ClusterCockpit/cc-metric-store
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cc-metric-store/e2/4929f05ad3/0/full.jsonl
Jan Eitzinger d38bf70f44 Checkpoint: e24929f05ad3 
Entire-Session: b03cb029-abe2-43af-9bd1-80d5278334c4
Entire-Strategy: manual-commit
Entire-Agent: Claude Code
Ephemeral-branch: entire/41fb959-e3b0c4
2026-04-01 15:37:36 +02:00

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This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package main\n 7→\n 8→import (\n 9→\t\"context\"\n 10→\t\"flag\"\n 11→\t\"fmt\"\n 12→\t\"os\"\n 13→\t\"os/signal\"\n 14→\t\"runtime/debug\"\n 15→\t\"sync\"\n 16→\t\"syscall\"\n 17→\n 18→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 19→\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n 20→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 22→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 23→\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n 24→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 25→\t\"github.com/google/gops/agent\"\n 26→)\n 27→\n 28→const (\n 29→\tenvGOGC = \"GOGC\"\n 30→)\n 31→\n 32→var (\n 33→\tdate string\n 34→\tcommit string\n 35→\tversion string\n 36→)\n 37→\n 38→var (\n 39→\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n 40→\tflagConfigFile, flagLogLevel string\n 41→)\n 42→\n 43→func printVersion() {\n 44→\tfmt.Printf(\"Version:\\t%s\\n\", version)\n 45→\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n 46→\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n 47→}\n 48→\n 49→func runServer(ctx context.Context) error {\n 50→\tvar wg sync.WaitGroup\n 51→\n 52→\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n 53→\tif mscfg == nil {\n 54→\t\treturn fmt.Errorf(\"missing metrics configuration\")\n 55→\t}\n 56→\tconfig.InitMetrics(mscfg)\n 57→\n 58→\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n 59→\tif mscfg == nil {\n 60→\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n 61→\t}\n 62→\n 63→\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n 64→\n 65→\t// Set GC percent if not configured\n 66→\tif os.Getenv(envGOGC) == \"\" {\n 67→\t\tdebug.SetGCPercent(15)\n 68→\t}\n 69→\n 70→\tif config.Keys.BackendURL != \"\" {\n 71→\t\tms := metricstore.GetMemoryStore()\n 72→\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n 73→\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n 74→\t}\n 75→\n 76→\t// Initialize HTTP server\n 77→\tsrv, err := NewServer(version, commit, date)\n 78→\tif err != nil {\n 79→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n 80→\t}\n 81→\n 82→\t// Channel to collect errors from server\n 83→\terrChan := make(chan error, 1)\n 84→\n 85→\t// Start HTTP server\n 86→\twg.Go(func() {\n 87→\t\tif err := srv.Start(ctx); err != nil {\n 88→\t\t\terrChan <- err\n 89→\t\t}\n 90→\t})\n 91→\n 92→\t// Handle shutdown signals\n 93→\twg.Add(1)\n 94→\tsigs := make(chan os.Signal, 1)\n 95→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n 96→\tgo func() {\n 97→\t\tdefer wg.Done()\n 98→\t\tselect {\n 99→\t\tcase <-sigs:\n 100→\t\t\tcclog.Info(\"Shutdown signal received\")\n 101→\t\tcase <-ctx.Done():\n 102→\t\t}\n 103→\n 104→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n 105→\t\tsrv.Shutdown(ctx)\n 106→\t}()\n 107→\n 108→\truntime.SystemdNotify(true, \"running\")\n 109→\n 110→\t// Wait for completion or errors\n 111→\tgo func() {\n 112→\t\twg.Wait()\n 113→\t\tclose(errChan)\n 114→\t}()\n 115→\n 116→\t// Wait for either server startup error or shutdown completion\n 117→\tif err := <-errChan; err != nil {\n 118→\t\treturn err\n 119→\t}\n 120→\n 121→\tcclog.Print(\"Graceful shutdown completed!\")\n 122→\treturn nil\n 123→}\n 124→\n 125→func run() error {\n 126→\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n 127→\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n 128→\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n 129→\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n 130→\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n 131→\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n 132→\tflag.Parse()\n 133→\n 134→\tif flagVersion {\n 135→\t\tprintVersion()\n 136→\t\treturn nil\n 137→\t}\n 138→\n 139→\tcclog.Init(flagLogLevel, flagLogDateTime)\n 140→\n 141→\tif flagGops || config.Keys.Debug.EnableGops {\n 142→\t\tif err := agent.Listen(agent.Options{}); err != nil {\n 143→\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n 144→\t\t}\n 145→\t}\n 146→\n 147→\tccconf.Init(flagConfigFile)\n 148→\n 149→\tcfg := ccconf.GetPackageConfig(\"main\")\n 150→\tif cfg == nil {\n 151→\t\treturn fmt.Errorf(\"main configuration must be present\")\n 152→\t}\n 153→\n 154→\tconfig.Init(cfg)\n 155→\n 156→\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n 157→\tif err := nats.Init(natsConfig); err != nil {\n 158→\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n 159→\t}\n 160→\tnats.Connect()\n 161→\n 162→\tctx, cancel := context.WithCancel(context.Background())\n 163→\tdefer cancel()\n 164→\n 165→\treturn runServer(ctx)\n 166→}\n 167→\n 168→func main() {\n 169→\tif err := run(); err != nil {\n 170→\t\tcclog.Error(err.Error())\n 171→\t\tos.Exit(1)\n 172→\t}\n 173→}\n 174→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"db3e1d42-0d29-4bde-9e36-80146de7949a","timestamp":"2026-04-01T13:15:52.551Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"e2d00524-f7d9-432e-b24d-cdd528db58b7","timestamp":"2026-04-01T13:15:52.653Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"e2d00524-f7d9-432e-b24d-cdd528db58b7","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:15:52.665Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01GEYCnVopudma2xEJaU3z3B","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01EgkwP1X5uri1XMrw1reVrj","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/config.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":7,"cache_creation_input_tokens":801,"cache_read_input_tokens":15323,"cache_creation":{"ephemeral_5m_input_tokens":801,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7YXPMcyyJSEWuzBrdh","uuid":"0d67c06e-8a77-4e45-89cc-4e9f75451f74"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"7202a617-6fe6-4cd8-b682-a9f1e7acc9aa","timestamp":"2026-04-01T13:15:52.665Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"7202a617-6fe6-4cd8-b682-a9f1e7acc9aa","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01EgkwP1X5uri1XMrw1reVrj","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package config\n 7→\n 8→import (\n 9→\t\"bytes\"\n 10→\t\"encoding/json\"\n 11→\t\"fmt\"\n 12→\n 13→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 14→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 15→)\n 16→\n 17→var metrics map[string]metricstore.MetricConfig\n 18→\n 19→type Config struct {\n 20→\tAddress string `json:\"addr\"`\n 21→\tCertFile string `json:\"https-cert-file\"`\n 22→\tKeyFile string `json:\"https-key-file\"`\n 23→\tUser string `json:\"user\"`\n 24→\tGroup string `json:\"group\"`\n 25→\tBackendURL string `json:\"backend-url\"`\n 26→\tDebug struct {\n 27→\t\tDumpToFile string `json:\"dump-to-file\"`\n 28→\t\tEnableGops bool `json:\"gops\"`\n 29→\t} `json:\"debug\"`\n 30→\tJwtPublicKey string `json:\"jwt-public-key\"`\n 31→}\n 32→\n 33→var Keys Config\n 34→\n 35→type metricConfigJSON struct {\n 36→\tFrequency int64 `json:\"frequency\"`\n 37→\tAggregation string `json:\"aggregation\"`\n 38→}\n 39→\n 40→func InitMetrics(metricConfig json.RawMessage) {\n 41→\tValidate(metricConfigSchema, metricConfig)\n 42→\n 43→\tvar tempMetrics map[string]metricConfigJSON\n 44→\tdec := json.NewDecoder(bytes.NewReader(metricConfig))\n 45→\tdec.DisallowUnknownFields()\n 46→\tif err := dec.Decode(&tempMetrics); err != nil {\n 47→\t\tcclog.Abortf(\"Config Init: Could not decode config file '%s'.\\nError: %s\\n\", metricConfig, err.Error())\n 48→\t}\n 49→\n 50→\tmetrics = make(map[string]metricstore.MetricConfig)\n 51→\tfor name, cfg := range tempMetrics {\n 52→\t\tagg, err := metricstore.AssignAggregationStrategy(cfg.Aggregation)\n 53→\t\tif err != nil {\n 54→\t\t\tcclog.Warnf(\"Could not parse aggregation strategy for metric '%s': %s\", name, err.Error())\n 55→\t\t}\n 56→\t\tmetrics[name] = metricstore.MetricConfig{\n 57→\t\t\tFrequency: cfg.Frequency,\n 58→\t\t\tAggregation: agg,\n 59→\t\t}\n 60→\t}\n 61→}\n 62→\n 63→func Init(mainConfig json.RawMessage) {\n 64→\tValidate(configSchema, mainConfig)\n 65→\tdec := json.NewDecoder(bytes.NewReader(mainConfig))\n 66→\tdec.DisallowUnknownFields()\n 67→\tif err := dec.Decode(&Keys); err != nil {\n 68→\t\tcclog.Abortf(\"Config Init: Could not decode config file '%s'.\\nError: %s\\n\", mainConfig, err.Error())\n 69→\t}\n 70→}\n 71→\n 72→func GetMetricFrequency(metricName string) (int64, error) {\n 73→\tif metric, ok := metrics[metricName]; ok {\n 74→\t\treturn metric.Frequency, nil\n 75→\t}\n 76→\treturn 0, fmt.Errorf(\"metric %s not found\", metricName)\n 77→}\n 78→\n 79→func GetMetrics() map[string]metricstore.MetricConfig {\n 80→\treturn metrics\n 81→}\n 82→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"eb772d26-703f-4cee-be9d-8a4d2ab9c12b","timestamp":"2026-04-01T13:15:52.690Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"ad0bae59-db66-42af-ab87-45ba51adcb74","timestamp":"2026-04-01T13:15:52.864Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"ad0bae59-db66-42af-ab87-45ba51adcb74","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:15:52.873Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01GEYCnVopudma2xEJaU3z3B","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01CChaa8GrS5AifwRUwmvFpU","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/schema.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":7,"cache_creation_input_tokens":801,"cache_read_input_tokens":15323,"cache_creation":{"ephemeral_5m_input_tokens":801,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7YXPMcyyJSEWuzBrdh","uuid":"b0ee594f-6601-41df-be28-695d51ac632a"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"e722439a-c8aa-4e44-8d02-2871610f2346","timestamp":"2026-04-01T13:15:52.878Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"e722439a-c8aa-4e44-8d02-2871610f2346","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01CChaa8GrS5AifwRUwmvFpU","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package config\n 7→\n 8→var configSchema = `\n 9→{\n 10→ \"type\": \"object\",\n 11→ \"properties\": {\n 12→ \"addr\": {\n 13→ \"description\": \"Address where the http (or https) server will listen on (for example: 'localhost:8080').\",\n 14→ \"type\": \"string\"\n 15→ },\n 16→ \"https-cert-file\": {\n 17→ \"description\": \"Filepath to SSL certificate. If also https-key-file is set, use HTTPS.\",\n 18→ \"type\": \"string\"\n 19→ },\n 20→ \"https-key-file\": {\n 21→ \"description\": \"Filepath to SSL key file. If also https-cert-file is set, use HTTPS.\",\n 22→ \"type\": \"string\"\n 23→ },\n 24→ \"user\": {\n 25→ \"description\": \"Drop root permissions once the port was taken. Only applicable if using privileged port.\",\n 26→ \"type\": \"string\"\n 27→ },\n 28→ \"group\": {\n 29→ \"description\": \"Drop root permissions once the port was taken. Only applicable if using privileged port.\",\n 30→ \"type\": \"string\"\n 31→ },\n 32→ \"backend-url\": {\n 33→ \"description\": \"URL of cc-backend for querying job information (e.g., 'https://localhost:8080').\",\n 34→ \"type\": \"string\"\n 35→ },\n 36→ \"debug\": {\n 37→ \"description\": \"Debug options.\",\n 38→ \"type\": \"object\",\n 39→ \"properties\": {\n 40→ \"dump-to-file\": {\n 41→ \"description\": \"Path to file for dumping internal state.\",\n 42→ \"type\": \"string\"\n 43→ },\n 44→ \"gops\": {\n 45→ \"description\": \"Enable gops agent for debugging.\",\n 46→ \"type\": \"boolean\"\n 47→ }\n 48→ }\n 49→ },\n 50→ \"jwt-public-key\": {\n 51→ \"description\": \"Ed25519 public key for JWT verification.\",\n 52→ \"type\": \"string\"\n 53→ }\n 54→ }\n 55→}`\n 56→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"742ed49b-b98e-4766-8dab-b444010dd7f5","timestamp":"2026-04-01T13:15:52.895Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"bf46b736-5e01-4b80-b5e8-06ec4850a562","timestamp":"2026-04-01T13:15:53.075Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"7991527d-a3c3-4462-8b03-08c7b1337003","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01R2sy24exePPkDd2jFPxXiA","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package config\n 7→\n 8→import (\n 9→\t\"encoding/json\"\n 10→\n 11→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 12→\t\"github.com/santhosh-tekuri/jsonschema/v5\"\n 13→)\n 14→\n 15→func Validate(schema string, instance json.RawMessage) {\n 16→\tsch, err := jsonschema.CompileString(\"schema.json\", schema)\n 17→\tif err != nil {\n 18→\t\tcclog.Fatalf(\"%#v\", err)\n 19→\t}\n 20→\n 21→\tvar v any\n 22→\tif err := json.Unmarshal([]byte(instance), &v); err != nil {\n 23→\t\tcclog.Fatal(err)\n 24→\t}\n 25→\n 26→\tif err = sch.Validate(v); err != nil {\n 27→\t\tcclog.Fatalf(\"%#v\", err)\n 28→\t}\n 29→}\n 30→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"0a13ba69-a4c7-4c1f-9c76-8a3772bab145","timestamp":"2026-04-01T13:15:53.100Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"45e253c1-88ea-4c30-a8b8-41f51409f194","timestamp":"2026-04-01T13:15:53.287Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"0d0dc8a6-887b-4438-bfdb-dd5fda35b95d","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01HiXz76PqaupAVB4K3TT3KR","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package config\n 7→\n 8→var metricConfigSchema = `\n 9→{\n 10→ \"type\": \"object\",\n 11→ \"description\": \"Map of metric names to their configuration.\",\n 12→ \"additionalProperties\": {\n 13→ \"type\": \"object\",\n 14→ \"properties\": {\n 15→ \"frequency\": {\n 16→ \"description\": \"Sampling frequency in seconds.\",\n 17→ \"type\": \"integer\"\n 18→ },\n 19→ \"aggregation\": {\n 20→ \"description\": \"Aggregation strategy: 'sum', 'avg', or 'null'.\",\n 21→ \"type\": [\"string\", \"null\"]\n 22→ }\n 23→ },\n 24→ \"required\": [\"frequency\", \"aggregation\"]\n 25→ }\n 26→}`\n 27→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"74c37d04-8bb2-44a5-9b27-acef32143995","timestamp":"2026-04-01T13:15:53.308Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"d8223281-ccb6-4cea-ac18-654bd3d7f5ba","timestamp":"2026-04-01T13:15:53.474Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"1f9bb514-5ba2-4f49-861a-e6cf6f0e7b9b","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Tr7xFXGLYotq4uynoXFnNk","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package main provides the entry point for the ClusterCockpit metric store server.\n 7→// This file contains HTTP server setup, routing configuration.\n 8→package main\n 9→\n 10→import (\n 11→\t\"context\"\n 12→\t\"crypto/tls\"\n 13→\t\"fmt\"\n 14→\t\"net\"\n 15→\t\"net/http\"\n 16→\t\"time\"\n 17→\n 18→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 19→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 20→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 22→\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n 23→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 24→\thttpSwagger \"github.com/swaggo/http-swagger/v2\"\n 25→)\n 26→\n 27→// Server encapsulates the HTTP server state and dependencies\n 28→type Server struct {\n 29→\trouter *http.ServeMux\n 30→\tserver *http.Server\n 31→}\n 32→\n 33→// NewServer creates and initializes a new Server instance\n 34→func NewServer(version, commit, buildDate string) (*Server, error) {\n 35→\ts := &Server{\n 36→\t\trouter: http.NewServeMux(),\n 37→\t}\n 38→\n 39→\tif err := s.init(); err != nil {\n 40→\t\treturn nil, err\n 41→\t}\n 42→\n 43→\treturn s, nil\n 44→}\n 45→\n 46→func (s *Server) init() error {\n 47→\tapi.MountRoutes(s.router)\n 48→\n 49→\tif flagDev {\n 50→\t\tcclog.Print(\"Enable Swagger UI!\")\n 51→\t\ts.router.HandleFunc(\"GET /swagger/\", httpSwagger.Handler(\n 52→\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Address+\"/swagger/doc.json\")))\n 53→\t}\n 54→\n 55→\treturn nil\n 56→}\n 57→\n 58→// Server timeout defaults (in seconds)\n 59→const (\n 60→\tdefaultReadTimeout = 30\n 61→\tdefaultWriteTimeout = 30\n 62→)\n 63→\n 64→func (s *Server) Start(ctx context.Context) error {\n 65→\t// Use configurable timeouts with defaults\n 66→\treadTimeout := time.Duration(defaultReadTimeout) * time.Second\n 67→\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n 68→\n 69→\ts.server = &http.Server{\n 70→\t\tReadTimeout: readTimeout,\n 71→\t\tWriteTimeout: writeTimeout,\n 72→\t\tHandler: s.router,\n 73→\t\tAddr: config.Keys.Address,\n 74→\t}\n 75→\n 76→\t// Start http or https server\n 77→\tlistener, err := net.Listen(\"tcp\", config.Keys.Address)\n 78→\tif err != nil {\n 79→\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Address, err)\n 80→\t}\n 81→\n 82→\tif config.Keys.CertFile != \"\" && config.Keys.KeyFile != \"\" {\n 83→\t\tcert, err := tls.LoadX509KeyPair(\n 84→\t\t\tconfig.Keys.CertFile, config.Keys.KeyFile)\n 85→\t\tif err != nil {\n 86→\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n 87→\t\t}\n 88→\t\tlistener = tls.NewListener(listener, &tls.Config{\n 89→\t\t\tCertificates: []tls.Certificate{cert},\n 90→\t\t\tCipherSuites: []uint16{\n 91→\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n 92→\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n 93→\t\t\t},\n 94→\t\t\tMinVersion: tls.VersionTLS12,\n 95→\t\t\tPreferServerCipherSuites: true,\n 96→\t\t})\n 97→\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Address)\n 98→\t} else {\n 99→\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Address)\n 100→\t}\n 101→\n 102→\t// Because this program will want to bind to a privileged port (like 80), the listener must\n 103→\t// be established first, then the user can be changed, and after that,\n 104→\t// the actual http server can be started.\n 105→\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n 106→\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n 107→\t}\n 108→\n 109→\t// Handle context cancellation for graceful shutdown\n 110→\tgo func() {\n 111→\t\t<-ctx.Done()\n 112→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n 113→\t\tdefer cancel()\n 114→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n 115→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n 116→\t\t}\n 117→\t}()\n 118→\n 119→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n 120→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n 121→\t}\n 122→\treturn nil\n 123→}\n 124→\n 125→func (s *Server) Shutdown(ctx context.Context) {\n 126→\t// Create a shutdown context with timeout\n 127→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n 128→\tdefer cancel()\n 129→\n 130→\tnc := nats.GetClient()\n 131→\tif nc != nil {\n 132→\t\tnc.Close()\n 133→\t}\n 134→\n 135→\t// First shut down the server gracefully (waiting for all ongoing requests)\n 136→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n 137→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n 138→\t}\n 139→\n 140→\t// Archive all the metric store data\n 141→\tmetricstore.Shutdown()\n 142→}\n 143→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"10aed219-120e-4649-a7e8-b86f452cf24e","timestamp":"2026-04-01T13:15:57.132Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"7ec706c2-3770-4475-9b80-74d8822e81c3","timestamp":"2026-04-01T13:15:57.305Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"31aa2305-6125-424e-8f0a-40c81209c0c1","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01W75fAtWkFGYuUpkyaTyucc","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package api\n 7→\n 8→import (\n 9→\t\"crypto/ed25519\"\n 10→\t\"encoding/base64\"\n 11→\t\"log\"\n 12→\t\"net/http\"\n 13→\n 14→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 15→)\n 16→\n 17→func MountRoutes(r *http.ServeMux) {\n 18→\tif len(config.Keys.JwtPublicKey) > 0 {\n 19→\t\tbuf, err := base64.StdEncoding.DecodeString(config.Keys.JwtPublicKey)\n 20→\t\tif err != nil {\n 21→\t\t\tlog.Fatalf(\"starting server failed: %v\", err)\n 22→\t\t}\n 23→\t\tpublicKey := ed25519.PublicKey(buf)\n 24→\t\t// Compatibility\n 25→\t\tr.Handle(\"POST /api/free\", authHandler(http.HandlerFunc(freeMetrics), publicKey))\n 26→\t\tr.Handle(\"POST /api/write\", authHandler(http.HandlerFunc(writeMetrics), publicKey))\n 27→\t\tr.Handle(\"GET /api/query\", authHandler(http.HandlerFunc(handleQuery), publicKey))\n 28→\t\tr.Handle(\"GET /api/debug\", authHandler(http.HandlerFunc(debugMetrics), publicKey))\n 29→\t\tr.Handle(\"GET /api/healthcheck\", authHandler(http.HandlerFunc(metricsHealth), publicKey))\n 30→\t\t// Refactor\n 31→\t\tr.Handle(\"POST /api/free/\", authHandler(http.HandlerFunc(freeMetrics), publicKey))\n 32→\t\tr.Handle(\"POST /api/write/\", authHandler(http.HandlerFunc(writeMetrics), publicKey))\n 33→\t\tr.Handle(\"GET /api/query/\", authHandler(http.HandlerFunc(handleQuery), publicKey))\n 34→\t\tr.Handle(\"GET /api/debug/\", authHandler(http.HandlerFunc(debugMetrics), publicKey))\n 35→\t\tr.Handle(\"GET /api/healthcheck/\", authHandler(http.HandlerFunc(metricsHealth), publicKey))\n 36→\t} else {\n 37→\t\t// Compatibility\n 38→\t\tr.HandleFunc(\"POST /api/free\", freeMetrics)\n 39→\t\tr.HandleFunc(\"POST /api/write\", writeMetrics)\n 40→\t\tr.HandleFunc(\"GET /api/query\", handleQuery)\n 41→\t\tr.HandleFunc(\"GET /api/debug\", debugMetrics)\n 42→\t\tr.HandleFunc(\"GET /api/healthcheck\", metricsHealth)\n 43→\t\t// Refactor\n 44→\t\tr.HandleFunc(\"POST /api/free/\", freeMetrics)\n 45→\t\tr.HandleFunc(\"POST /api/write/\", writeMetrics)\n 46→\t\tr.HandleFunc(\"GET /api/query/\", handleQuery)\n 47→\t\tr.HandleFunc(\"GET /api/debug/\", debugMetrics)\n 48→\t\tr.HandleFunc(\"GET /api/healthcheck/\", metricsHealth)\n 49→\t}\n 50→}\n 51→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"22ef9cd0-690e-4a2d-b58c-9c5bdaf73162","timestamp":"2026-04-01T13:15:57.346Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"904d67c0-7621-42fa-b85a-0d9e69fb3047","timestamp":"2026-04-01T13:15:57.530Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"1a6b911a-1618-4a36-9ffc-e1e887286f7c","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01S8uQc1rgLWLLk6K4CGFqZo","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package api provides the REST API for cc-metric-store.\n 7→//\n 8→// @title cc-metric-store REST API\n 9→// @version 1.0.0\n 10→// @description API for cc-metric-store\n 11→//\n 12→// @contact.name ClusterCockpit Project\n 13→// @contact.url https://clustercockpit.org\n 14→// @contact.email support@clustercockpit.org\n 15→//\n 16→// @license.name MIT License\n 17→// @license.url https://opensource.org/licenses/MIT\n 18→//\n 19→// @host localhost:8082\n 20→// @basePath /api/\n 21→//\n 22→// @securityDefinitions.apikey ApiKeyAuth\n 23→// @in header\n 24→// @name X-Auth-Token\n 25→package api\n 26→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"64218845-0ae8-493f-a508-a96a3173ba9c","timestamp":"2026-04-01T13:15:57.574Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"59cdf048-7e16-41fe-b324-bfb4ea1aeb6a","timestamp":"2026-04-01T13:15:57.576Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"d0e6a5d5-8a91-43bd-848b-1aa485b15e1d","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:15:59.368Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01WLHLWJrsD5aDbQVLuWfBAL","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_0153yZuZ3F2kS5Nd2wRphG67","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/nodeprovider.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":7,"cache_creation_input_tokens":3934,"cache_read_input_tokens":24815,"cache_creation":{"ephemeral_5m_input_tokens":3934,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7Yz8Bx9tU6zb4yN3Lz","uuid":"2e531794-7695-4057-9fe3-3323d00bdae0"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"1443e866-50a2-4d76-8bed-281639e447b5","timestamp":"2026-04-01T13:15:59.369Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"1443e866-50a2-4d76-8bed-281639e447b5","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0153yZuZ3F2kS5Nd2wRphG67","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package api\n 7→\n 8→import (\n 9→\t\"encoding/json\"\n 10→\t\"fmt\"\n 11→\t\"net/http\"\n 12→\t\"time\"\n 13→)\n 14→\n 15→// BackendNodeProvider implements metricstore.NodeProvider by querying\n 16→// the cc-backend /api/jobs/used_nodes endpoint.\n 17→type BackendNodeProvider struct {\n 18→\tbackendURL string\n 19→\tclient *http.Client\n 20→}\n 21→\n 22→// NewBackendNodeProvider creates a new BackendNodeProvider that queries\n 23→// the given cc-backend URL for used nodes information.\n 24→func NewBackendNodeProvider(backendURL string) *BackendNodeProvider {\n 25→\treturn &BackendNodeProvider{\n 26→\t\tbackendURL: backendURL,\n 27→\t\tclient: &http.Client{\n 28→\t\t\tTimeout: 10 * time.Second,\n 29→\t\t},\n 30→\t}\n 31→}\n 32→\n 33→// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n 34→// that are currently in use by jobs that started before the given timestamp.\n 35→func (p *BackendNodeProvider) GetUsedNodes(ts int64) (map[string][]string, error) {\n 36→\turl := fmt.Sprintf(\"%s/api/jobs/used_nodes?ts=%d\", p.backendURL, ts)\n 37→\n 38→\tresp, err := p.client.Get(url)\n 39→\tif err != nil {\n 40→\t\treturn nil, fmt.Errorf(\"querying used nodes from backend: %w\", err)\n 41→\t}\n 42→\tdefer resp.Body.Close()\n 43→\n 44→\tif resp.StatusCode != http.StatusOK {\n 45→\t\treturn nil, fmt.Errorf(\"backend returned status %d\", resp.StatusCode)\n 46→\t}\n 47→\n 48→\tvar result map[string][]string\n 49→\tif err := json.NewDecoder(resp.Body).Decode(&result); err != nil {\n 50→\t\treturn nil, fmt.Errorf(\"decoding used nodes response: %w\", err)\n 51→\t}\n 52→\n 53→\treturn result, nil\n 54→}\n 55→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"fe85c4dd-1a31-4686-8374-db342fe9ad05","timestamp":"2026-04-01T13:15:59.392Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"2a3af06d-7de5-4286-aaee-e84f29e9399d","timestamp":"2026-04-01T13:15:59.515Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"2a3af06d-7de5-4286-aaee-e84f29e9399d","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:15:59.539Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01WLHLWJrsD5aDbQVLuWfBAL","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01MoRnWzTmnKi1VxyL9xaRiv","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/authentication.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":7,"cache_creation_input_tokens":3934,"cache_read_input_tokens":24815,"cache_creation":{"ephemeral_5m_input_tokens":3934,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7Yz8Bx9tU6zb4yN3Lz","uuid":"c374bbb1-6b41-4cba-b2b9-486b4022d5dc"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"534f8643-28e5-429f-b1b4-4c1385e6e359","timestamp":"2026-04-01T13:15:59.540Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"534f8643-28e5-429f-b1b4-4c1385e6e359","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01MoRnWzTmnKi1VxyL9xaRiv","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package api\n 7→\n 8→import (\n 9→\t\"crypto/ed25519\"\n 10→\t\"errors\"\n 11→\t\"net/http\"\n 12→\t\"strings\"\n 13→\t\"sync\"\n 14→\n 15→\t\"github.com/golang-jwt/jwt/v4\"\n 16→)\n 17→\n 18→func authHandler(next http.Handler, publicKey ed25519.PublicKey) http.Handler {\n 19→\tcacheLock := sync.RWMutex{}\n 20→\tcache := map[string]*jwt.Token{}\n 21→\n 22→\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n 23→\t\tauthheader := r.Header.Get(\"Authorization\")\n 24→\t\tif authheader == \"\" || !strings.HasPrefix(authheader, \"Bearer \") {\n 25→\t\t\thttp.Error(rw, \"Use JWT Authentication\", http.StatusUnauthorized)\n 26→\t\t\treturn\n 27→\t\t}\n 28→\n 29→\t\trawtoken := authheader[len(\"Bearer \"):]\n 30→\t\tcacheLock.RLock()\n 31→\t\ttoken, ok := cache[rawtoken]\n 32→\t\tcacheLock.RUnlock()\n 33→\t\tif ok && token.Claims.Valid() == nil {\n 34→\t\t\tnext.ServeHTTP(rw, r)\n 35→\t\t\treturn\n 36→\t\t}\n 37→\n 38→\t\t// The actual token is ignored for now.\n 39→\t\t// In case expiration and so on are specified, the Parse function\n 40→\t\t// already returns an error for expired tokens.\n 41→\t\tvar err error\n 42→\t\ttoken, err = jwt.Parse(rawtoken, func(t *jwt.Token) (any, error) {\n 43→\t\t\tif t.Method != jwt.SigningMethodEdDSA {\n 44→\t\t\t\treturn nil, errors.New(\"only Ed25519/EdDSA supported\")\n 45→\t\t\t}\n 46→\n 47→\t\t\treturn publicKey, nil\n 48→\t\t})\n 49→\t\tif err != nil {\n 50→\t\t\thttp.Error(rw, err.Error(), http.StatusUnauthorized)\n 51→\t\t\treturn\n 52→\t\t}\n 53→\n 54→\t\tcacheLock.Lock()\n 55→\t\tcache[rawtoken] = token\n 56→\t\tcacheLock.Unlock()\n 57→\n 58→\t\t// Let request through...\n 59→\t\tnext.ServeHTTP(rw, r)\n 60→\t})\n 61→}\n 62→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"ee797dee-b66a-4ad3-af58-1f85dbc2f035","timestamp":"2026-04-01T13:15:59.550Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"92913835-020e-4bb8-b9da-ecaec08d4f48","timestamp":"2026-04-01T13:15:59.551Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"92913835-020e-4bb8-b9da-ecaec08d4f48","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_013N1J32b7bmaR4AqYwJ6eCg","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package api\n 7→\n 8→import (\n 9→\t\"bufio\"\n 10→\t\"encoding/json\"\n 11→\t\"errors\"\n 12→\t\"fmt\"\n 13→\t\"log\"\n 14→\t\"math\"\n 15→\t\"net/http\"\n 16→\t\"strconv\"\n 17→\t\"strings\"\n 18→\n 19→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 20→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 22→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 23→\t\"github.com/ClusterCockpit/cc-line-protocol/v2/lineprotocol\"\n 24→)\n 25→\n 26→// ErrorResponse model\n 27→type ErrorResponse struct {\n 28→\t// Statustext of Errorcode\n 29→\tStatus string `json:\"status\"`\n 30→\tError string `json:\"error\"` // Error Message\n 31→}\n 32→\n 33→// DefaultAPIResponse model\n 34→type DefaultAPIResponse struct {\n 35→\tMessage string `json:\"msg\"`\n 36→}\n 37→\n 38→// handleError writes a standardized JSON error response with the given status code.\n 39→// It logs the error at WARN level and ensures proper Content-Type headers are set.\n 40→func handleError(err error, statusCode int, rw http.ResponseWriter) {\n 41→\tcclog.Warnf(\"REST ERROR : %s\", err.Error())\n 42→\trw.Header().Add(\"Content-Type\", \"application/json\")\n 43→\trw.WriteHeader(statusCode)\n 44→\tif err := json.NewEncoder(rw).Encode(ErrorResponse{\n 45→\t\tStatus: http.StatusText(statusCode),\n 46→\t\tError: err.Error(),\n 47→\t}); err != nil {\n 48→\t\tcclog.Errorf(\"Failed to encode error response: %v\", err)\n 49→\t}\n 50→}\n 51→\n 52→type APIMetricData struct {\n 53→\tError *string `json:\"error,omitempty\"`\n 54→\tData schema.FloatArray `json:\"data,omitempty\" swaggertype:\"array,number\"`\n 55→\tFrom int64 `json:\"from\"`\n 56→\tTo int64 `json:\"to\"`\n 57→\tResolution int64 `json:\"resolution\"`\n 58→\tAvg schema.Float `json:\"avg\" swaggertype:\"number\"`\n 59→\tMin schema.Float `json:\"min\" swaggertype:\"number\"`\n 60→\tMax schema.Float `json:\"max\" swaggertype:\"number\"`\n 61→}\n 62→\n 63→// TODO: Optimize this, just like the stats endpoint!\n 64→func (data *APIMetricData) AddStats() {\n 65→\tn := 0\n 66→\tsum, min, max := 0.0, math.MaxFloat64, -math.MaxFloat64\n 67→\tfor _, x := range data.Data {\n 68→\t\tif x.IsNaN() {\n 69→\t\t\tcontinue\n 70→\t\t}\n 71→\n 72→\t\tn += 1\n 73→\t\tsum += float64(x)\n 74→\t\tmin = math.Min(min, float64(x))\n 75→\t\tmax = math.Max(max, float64(x))\n 76→\t}\n 77→\n 78→\tif n > 0 {\n 79→\t\tavg := sum / float64(n)\n 80→\t\tdata.Avg = schema.Float(avg)\n 81→\t\tdata.Min = schema.Float(min)\n 82→\t\tdata.Max = schema.Float(max)\n 83→\t} else {\n 84→\t\tdata.Avg, data.Min, data.Max = schema.NaN, schema.NaN, schema.NaN\n 85→\t}\n 86→}\n 87→\n 88→func (data *APIMetricData) ScaleBy(f schema.Float) {\n 89→\tif f == 0 || f == 1 {\n 90→\t\treturn\n 91→\t}\n 92→\n 93→\tdata.Avg *= f\n 94→\tdata.Min *= f\n 95→\tdata.Max *= f\n 96→\tfor i := 0; i < len(data.Data); i++ {\n 97→\t\tdata.Data[i] *= f\n 98→\t}\n 99→}\n 100→\n 101→func (data *APIMetricData) PadDataWithNull(ms *metricstore.MemoryStore, from, to int64, metric string) {\n 102→\tminfo, ok := ms.Metrics[metric]\n 103→\tif !ok {\n 104→\t\treturn\n 105→\t}\n 106→\n 107→\tif (data.From / minfo.Frequency) > (from / minfo.Frequency) {\n 108→\t\tpadfront := int((data.From / minfo.Frequency) - (from / minfo.Frequency))\n 109→\t\tndata := make([]schema.Float, 0, padfront+len(data.Data))\n 110→\t\tfor range padfront {\n 111→\t\t\tndata = append(ndata, schema.NaN)\n 112→\t\t}\n 113→\t\tfor j := 0; j < len(data.Data); j++ {\n 114→\t\t\tndata = append(ndata, data.Data[j])\n 115→\t\t}\n 116→\t\tdata.Data = ndata\n 117→\t}\n 118→}\n 119→\n 120→type APIQueryRequest struct {\n 121→\tCluster string `json:\"cluster\"`\n 122→\tQueries []APIQuery `json:\"queries\"`\n 123→\tForAllNodes []string `json:\"for-all-nodes\"`\n 124→\tFrom int64 `json:\"from\"`\n 125→\tTo int64 `json:\"to\"`\n 126→\tWithStats bool `json:\"with-stats\"`\n 127→\tWithData bool `json:\"with-data\"`\n 128→\tWithPadding bool `json:\"with-padding\"`\n 129→}\n 130→\n 131→type APIQueryResponse struct {\n 132→\tQueries []APIQuery `json:\"queries,omitempty\"`\n 133→\tResults [][]APIMetricData `json:\"results\"`\n 134→}\n 135→\n 136→type APIQuery struct {\n 137→\tType *string `json:\"type,omitempty\"`\n 138→\tSubType *string `json:\"subtype,omitempty\"`\n 139→\tMetric string `json:\"metric\"`\n 140→\tHostname string `json:\"host\"`\n 141→\tResolution int64 `json:\"resolution\"`\n 142→\tTypeIds []string `json:\"type-ids,omitempty\"`\n 143→\tSubTypeIds []string `json:\"subtype-ids,omitempty\"`\n 144→\tScaleFactor schema.Float `json:\"scale-by,omitempty\" swaggertype:\"number\"`\n 145→\tAggregate bool `json:\"aggreg\"`\n 146→}\n 147→\n 148→// handleQuery godoc\n 149→// @summary Query metrics\n 150→// @tags query\n 151→// @description This endpoint allows the users to retrieve data from the\n 152→// in-memory database. The CCMS will return data in JSON format for the\n 153→// specified interval requested by the user\n 154→// @accept json\n 155→// @produce json\n 156→// @param request body APIQueryRequest true \"API query payload object\"\n 157→// @success 200 {object} APIQueryResponse \"API query response object\"\n 158→// @failure 400 {object} ErrorResponse \"Bad Request\"\n 159→// @failure 401 \t\t {object} ErrorResponse \"Unauthorized\"\n 160→// @failure 403 {object} ErrorResponse \"Forbidden\"\n 161→// @failure 500 {object} ErrorResponse \"Internal Server Error\"\n 162→// @security ApiKeyAuth\n 163→// @router /query/ [get]\n 164→func handleQuery(rw http.ResponseWriter, r *http.Request) {\n 165→\tvar err error\n 166→\tver := r.URL.Query().Get(\"version\")\n 167→\tif ver == \"\" {\n 168→\t\tver = \"v2\"\n 169→\t}\n 170→\treq := APIQueryRequest{WithStats: true, WithData: true, WithPadding: true}\n 171→\tif err := json.NewDecoder(r.Body).Decode(&req); err != nil {\n 172→\t\thandleError(err, http.StatusBadRequest, rw)\n 173→\t\treturn\n 174→\t}\n 175→\n 176→\tms := metricstore.GetMemoryStore()\n 177→\n 178→\tresponse := APIQueryResponse{\n 179→\t\tResults: make([][]APIMetricData, 0, len(req.Queries)),\n 180→\t}\n 181→\tif req.ForAllNodes != nil {\n 182→\t\tnodes := ms.ListChildren([]string{req.Cluster})\n 183→\t\tfor _, node := range nodes {\n 184→\t\t\tfor _, metric := range req.ForAllNodes {\n 185→\t\t\t\tq := APIQuery{\n 186→\t\t\t\t\tMetric: metric,\n 187→\t\t\t\t\tHostname: node,\n 188→\t\t\t\t}\n 189→\t\t\t\treq.Queries = append(req.Queries, q)\n 190→\t\t\t\tresponse.Queries = append(response.Queries, q)\n 191→\t\t\t}\n 192→\t\t}\n 193→\t}\n 194→\n 195→\tfor _, query := range req.Queries {\n 196→\t\tsels := make([]util.Selector, 0, 1)\n 197→\t\tif query.Aggregate || query.Type == nil {\n 198→\t\t\tsel := util.Selector{{String: req.Cluster}, {String: query.Hostname}}\n 199→\t\t\tif query.Type != nil {\n 200→\t\t\t\tif len(query.TypeIds) == 1 {\n 201→\t\t\t\t\tsel = append(sel, util.SelectorElement{String: *query.Type + query.TypeIds[0]})\n 202→\t\t\t\t} else {\n 203→\t\t\t\t\tids := make([]string, len(query.TypeIds))\n 204→\t\t\t\t\tfor i, id := range query.TypeIds {\n 205→\t\t\t\t\t\tids[i] = *query.Type + id\n 206→\t\t\t\t\t}\n 207→\t\t\t\t\tsel = append(sel, util.SelectorElement{Group: ids})\n 208→\t\t\t\t}\n 209→\n 210→\t\t\t\tif query.SubType != nil {\n 211→\t\t\t\t\tif len(query.SubTypeIds) == 1 {\n 212→\t\t\t\t\t\tsel = append(sel, util.SelectorElement{String: *query.SubType + query.SubTypeIds[0]})\n 213→\t\t\t\t\t} else {\n 214→\t\t\t\t\t\tids := make([]string, len(query.SubTypeIds))\n 215→\t\t\t\t\t\tfor i, id := range query.SubTypeIds {\n 216→\t\t\t\t\t\t\tids[i] = *query.SubType + id\n 217→\t\t\t\t\t\t}\n 218→\t\t\t\t\t\tsel = append(sel, util.SelectorElement{Group: ids})\n 219→\t\t\t\t\t}\n 220→\t\t\t\t}\n 221→\t\t\t}\n 222→\t\t\tsels = append(sels, sel)\n 223→\t\t} else {\n 224→\t\t\tfor _, typeID := range query.TypeIds {\n 225→\t\t\t\tif query.SubType != nil {\n 226→\t\t\t\t\tfor _, subTypeID := range query.SubTypeIds {\n 227→\t\t\t\t\t\tsels = append(sels, util.Selector{\n 228→\t\t\t\t\t\t\t{String: req.Cluster},\n 229→\t\t\t\t\t\t\t{String: query.Hostname},\n 230→\t\t\t\t\t\t\t{String: *query.Type + typeID},\n 231→\t\t\t\t\t\t\t{String: *query.SubType + subTypeID},\n 232→\t\t\t\t\t\t})\n 233→\t\t\t\t\t}\n 234→\t\t\t\t} else {\n 235→\t\t\t\t\tsels = append(sels, util.Selector{\n 236→\t\t\t\t\t\t{String: req.Cluster},\n 237→\t\t\t\t\t\t{String: query.Hostname},\n 238→\t\t\t\t\t\t{String: *query.Type + typeID},\n 239→\t\t\t\t\t})\n 240→\t\t\t\t}\n 241→\t\t\t}\n 242→\t\t}\n 243→\n 244→\t\t// log.Printf(\"query: %#v\\n\", query)\n 245→\t\t// log.Printf(\"sels: %#v\\n\", sels)\n 246→\n 247→\t\tres := make([]APIMetricData, 0, len(sels))\n 248→\t\tfor _, sel := range sels {\n 249→\t\t\tdata := APIMetricData{}\n 250→\n 251→\t\t\tdata.Data, data.From, data.To, data.Resolution, err = ms.Read(sel, query.Metric, req.From, req.To, query.Resolution)\n 252→\t\t\tif err != nil {\n 253→\t\t\t\t// Skip Error If Just Missing Host or Metric, Continue\n 254→\t\t\t\t// Empty Return For Metric Handled Gracefully By Frontend\n 255→\t\t\t\tif err != metricstore.ErrNoHostOrMetric {\n 256→\t\t\t\t\tmsg := err.Error()\n 257→\t\t\t\t\tdata.Error = &msg\n 258→\t\t\t\t\tres = append(res, data)\n 259→\t\t\t\t} else {\n 260→\t\t\t\t\tcclog.Warnf(\"failed to fetch '%s' from host '%s' (cluster: %s): %s\", query.Metric, query.Hostname, req.Cluster, err.Error())\n 261→\t\t\t\t}\n 262→\t\t\t\tcontinue\n 263→\t\t\t}\n 264→\n 265→\t\t\tif req.WithStats {\n 266→\t\t\t\tdata.AddStats()\n 267→\t\t\t}\n 268→\t\t\tif query.ScaleFactor != 0 {\n 269→\t\t\t\tdata.ScaleBy(query.ScaleFactor)\n 270→\t\t\t}\n 271→\t\t\tif req.WithPadding {\n 272→\t\t\t\tdata.PadDataWithNull(ms, req.From, req.To, query.Metric)\n 273→\t\t\t}\n 274→\t\t\tif !req.WithData {\n 275→\t\t\t\tdata.Data = nil\n 276→\t\t\t}\n 277→\t\t\tres = append(res, data)\n 278→\t\t}\n 279→\t\tresponse.Results = append(response.Results, res)\n 280→\t}\n 281→\n 282→\trw.Header().Set(\"Content-Type\", \"application/json\")\n 283→\tbw := bufio.NewWriter(rw)\n 284→\tdefer bw.Flush()\n 285→\tif err := json.NewEncoder(bw).Encode(response); err != nil {\n 286→\t\tlog.Print(err)\n 287→\t\treturn\n 288→\t}\n 289→}\n 290→\n 291→// handleFree godoc\n 292→// @summary\n 293→// @tags free\n 294→// @description This endpoint allows the users to free the Buffers from the\n 295→// metric store. This endpoint offers the users to remove then systematically\n 296→// and also allows then to prune the data under node, if they do not want to\n 297→// remove the whole node.\n 298→// @produce json\n 299→// @param to query string false \"up to timestamp\"\n 300→// @success 200 {string} string \"ok\"\n 301→// @failure 400 {object} ErrorResponse \"Bad Request\"\n 302→// @failure 401 {object} ErrorResponse \"Unauthorized\"\n 303→// @failure 403 {object} ErrorResponse \"Forbidden\"\n 304→// @failure 500 {object} ErrorResponse \"Internal Server Error\"\n 305→// @security ApiKeyAuth\n 306→// @router /free/ [post]\n 307→func freeMetrics(rw http.ResponseWriter, r *http.Request) {\n 308→\trawTo := r.URL.Query().Get(\"to\")\n 309→\tif rawTo == \"\" {\n 310→\t\thandleError(errors.New(\"'to' is a required query parameter\"), http.StatusBadRequest, rw)\n 311→\t\treturn\n 312→\t}\n 313→\n 314→\tto, err := strconv.ParseInt(rawTo, 10, 64)\n 315→\tif err != nil {\n 316→\t\thandleError(err, http.StatusInternalServerError, rw)\n 317→\t\treturn\n 318→\t}\n 319→\n 320→\tbodyDec := json.NewDecoder(r.Body)\n 321→\tvar selectors [][]string\n 322→\terr = bodyDec.Decode(&selectors)\n 323→\tif err != nil {\n 324→\t\thttp.Error(rw, err.Error(), http.StatusBadRequest)\n 325→\t\treturn\n 326→\t}\n 327→\n 328→\tms := metricstore.GetMemoryStore()\n 329→\tn := 0\n 330→\tfor _, sel := range selectors {\n 331→\t\tbn, err := ms.Free(sel, to)\n 332→\t\tif err != nil {\n 333→\t\t\thandleError(err, http.StatusInternalServerError, rw)\n 334→\t\t\treturn\n 335→\t\t}\n 336→\n 337→\t\tn += bn\n 338→\t}\n 339→\n 340→\trw.WriteHeader(http.StatusOK)\n 341→\tfmt.Fprintf(rw, \"buffers freed: %d\\n\", n)\n 342→}\n 343→\n 344→// handleWrite godoc\n 345→// @summary Receive metrics in InfluxDB line-protocol\n 346→// @tags write\n 347→// @description Write data to the in-memory store in the InfluxDB line-protocol using [this format](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md)\n 348→\n 349→// @accept plain\n 350→// @produce json\n 351→// @param cluster query string false \"If the lines in the body do not have a cluster tag, use this value instead.\"\n 352→// @success 200 {string} string \"ok\"\n 353→// @failure 400 {object} ErrorResponse \"Bad Request\"\n 354→// @failure 401 {object} ErrorResponse \"Unauthorized\"\n 355→// @failure 403 {object} ErrorResponse \"Forbidden\"\n 356→// @failure 500 {object} ErrorResponse \"Internal Server Error\"\n 357→// @security ApiKeyAuth\n 358→// @router /write/ [post]\n 359→func writeMetrics(rw http.ResponseWriter, r *http.Request) {\n 360→\trw.Header().Add(\"Content-Type\", \"application/json\")\n 361→\n 362→\t// Extract the \"cluster\" query parameter without allocating a url.Values map.\n 363→\tcluster := queryParam(r.URL.RawQuery, \"cluster\")\n 364→\n 365→\t// Stream directly from the request body instead of copying it into a\n 366→\t// temporary buffer via io.ReadAll. The line-protocol decoder supports\n 367→\t// io.Reader natively, so this avoids the largest heap allocation.\n 368→\tms := metricstore.GetMemoryStore()\n 369→\tdec := lineprotocol.NewDecoder(r.Body)\n 370→\tif err := metricstore.DecodeLine(dec, ms, cluster); err != nil {\n 371→\t\tcclog.Errorf(\"/api/write error: %s\", err.Error())\n 372→\t\thandleError(err, http.StatusBadRequest, rw)\n 373→\t\treturn\n 374→\t}\n 375→\trw.WriteHeader(http.StatusOK)\n 376→}\n 377→\n 378→// handleDebug godoc\n 379→// @summary Debug endpoint\n 380→// @tags debug\n 381→// @description This endpoint allows the users to print the content of\n 382→// nodes/clusters/metrics to review the state of the data.\n 383→// @produce json\n 384→// @param selector query string false \"Selector\"\n 385→// @success 200 {string} string \"Debug dump\"\n 386→// @failure 400 {object} ErrorResponse \"Bad Request\"\n 387→// @failure 401 {object} ErrorResponse \"Unauthorized\"\n 388→// @failure 403 {object} ErrorResponse \"Forbidden\"\n 389→// @failure 500 {object} ErrorResponse \"Internal Server Error\"\n 390→// @security ApiKeyAuth\n 391→// @router /debug/ [post]\n 392→func debugMetrics(rw http.ResponseWriter, r *http.Request) {\n 393→\traw := r.URL.Query().Get(\"selector\")\n 394→\trw.Header().Add(\"Content-Type\", \"application/json\")\n 395→\tselector := []string{}\n 396→\tif len(raw) != 0 {\n 397→\t\tselector = strings.Split(raw, \":\")\n 398→\t}\n 399→\n 400→\tms := metricstore.GetMemoryStore()\n 401→\tif err := ms.DebugDump(bufio.NewWriter(rw), selector); err != nil {\n 402→\t\thandleError(err, http.StatusBadRequest, rw)\n 403→\t\treturn\n 404→\t}\n 405→}\n 406→\n 407→// handleHealthCheck godoc\n 408→// @summary HealthCheck endpoint\n 409→// @tags healthcheck\n 410→// @description This endpoint allows the users to check if a node is healthy\n 411→// @produce json\n 412→// @param selector query string false \"Selector\"\n 413→// @success 200 {string} string \"Debug dump\"\n 414→// @failure 400 {object} ErrorResponse \"Bad Request\"\n 415→// @failure 401 {object} ErrorResponse \"Unauthorized\"\n 416→// @failure 403 {object} ErrorResponse \"Forbidden\"\n 417→// @failure 500 {object} ErrorResponse \"Internal Server Error\"\n 418→// @security ApiKeyAuth\n 419→// @router /healthcheck/ [get]\n 420→func metricsHealth(rw http.ResponseWriter, r *http.Request) {\n 421→\treq := metricstore.HealthCheckReq{}\n 422→\n 423→\tdec := json.NewDecoder(r.Body)\n 424→\tdec.DisallowUnknownFields()\n 425→\n 426→\tif err := dec.Decode(&req); err != nil {\n 427→\t\thandleError(fmt.Errorf(\"parsing request body failed: %w\", err),\n 428→\t\t\thttp.StatusBadRequest, rw)\n 429→\t\treturn\n 430→\t}\n 431→\n 432→\trw.Header().Add(\"Content-Type\", \"application/json\")\n 433→\n 434→\tms := metricstore.GetMemoryStore()\n 435→\tresults, err := ms.HealthCheck(req.Cluster, req.Nodes, req.MetricNames)\n 436→\tif err != nil {\n 437→\t\thandleError(err, http.StatusBadRequest, rw)\n 438→\t\treturn\n 439→\t}\n 440→\n 441→\trw.Header().Set(\"Content-Type\", \"application/json\")\n 442→\tbw := bufio.NewWriter(rw)\n 443→\tdefer bw.Flush()\n 444→\tif err := json.NewEncoder(bw).Encode(results); err != nil {\n 445→\t\tlog.Print(err)\n 446→\t\treturn\n 447→\t}\n 448→}\n 449→\n 450→// queryParam extracts a single query parameter value from a raw query string\n 451→// without allocating a url.Values map.\n 452→func queryParam(rawQuery, key string) string {\n 453→\tfor rawQuery != \"\" {\n 454→\t\tvar kv string\n 455→\t\tif before, after, ok := strings.Cut(rawQuery, \"&\"); ok {\n 456→\t\t\tkv, rawQuery = before, after\n 457→\t\t} else {\n 458→\t\t\tkv, rawQuery = rawQuery, \"\"\n 459→\t\t}\n 460→\t\tif before, after, ok := strings.Cut(kv, \"=\"); ok {\n 461→\t\t\tif before == key {\n 462→\t\t\t\treturn after\n 463→\t\t\t}\n 464→\t\t} else if kv == key {\n 465→\t\t\treturn \"\"\n 466→\t\t}\n 467→\t}\n 468→\treturn \"\"\n 469→}\n 470→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"36615ea2-7a88-466c-b31a-b297793319f7","timestamp":"2026-04-01T13:15:59.570Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"ad570252-1221-44a6-afc8-a9634209dc0c","timestamp":"2026-04-01T13:15:59.571Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"ad570252-1221-44a6-afc8-a9634209dc0c","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:16:01.447Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_018EhujzRac1pcZf6qwUe337","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01GYHmBwXi1jdsrJWDBM7ULq","name":"Bash","input":{"command":"find /Users/jan/prg/ClusterCockpit/cc-metric-store -type f -name \"*.go\" | wc -l && find /Users/jan/prg/ClusterCockpit/cc-metric-store -type f \\( -name \"*.json\" -o -name \"*.md\" \\) | head -20"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1635,"cache_creation_input_tokens":6858,"cache_read_input_tokens":28749,"cache_creation":{"ephemeral_5m_input_tokens":6858,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7Z8Tk46dh9YKN9wc9H","uuid":"11ffc039-a26d-4b3f-85e8-eb757025b90a"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"bc1cc036-2ef4-40ca-8644-026043bfcb06","timestamp":"2026-04-01T13:16:01.448Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"bc1cc036-2ef4-40ca-8644-026043bfcb06","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01GYHmBwXi1jdsrJWDBM7ULq","type":"tool_result","content":" 13\n/Users/jan/prg/ClusterCockpit/cc-metric-store/config.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.claude/settings.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.claude/settings.local.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/ReleaseNotes.md\n/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md\n/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config-nats.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/api/swagger.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.git/entire-sessions/b03cb029-abe2-43af-9bd1-80d5278334c4.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.entire/settings.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.entire/settings.local.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.entire/tmp/pre-prompt-b03cb029-abe2-43af-9bd1-80d5278334c4.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.entire/tmp/REDACTED.json\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.entire/metadata/2ae52553-8b77-41f7-ac23-2703eee15145/context.md\n/Users/jan/prg/ClusterCockpit/cc-metric-store/.entire/metadata/5bdec311-7e4d-4543-91ea-fce0dbab2f32/context.md","is_error":false}]},"uuid":"2c92611d-0b9c-4f44-93df-e1d18b100c7c","timestamp":"2026-04-01T13:17:08.118Z"},"type":"agent_progress","prompt":"","agentId":"ac332d8e505687c35"},"toolUseID":"agent_msg_019qxT3qZBaHG1qyHtEKCms6","parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","uuid":"8a2aa067-30c7-4333-b4c5-a3e9c47abadf","timestamp":"2026-04-01T13:17:08.119Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"8a2aa067-30c7-4333-b4c5-a3e9c47abadf","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Agent","command":"entire hooks claude-code post-task"},"parentToolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","toolUseID":"toolu_019GzWFTS5ou46JPaWpcwcFk","timestamp":"2026-04-01T13:17:25.165Z","uuid":"9eaa3064-7357-4599-8166-ccb2bb85e5eb","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"8f174596-9627-4e21-bb50-76f6adb95c7b","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019GzWFTS5ou46JPaWpcwcFk","type":"tool_result","content":[{"type":"text","text":"Perfect! I have now explored all the relevant files. Let me provide you with a comprehensive summary of the findings:\n\n## Exploration Summary: cc-metric-store Codebase\n\nI have successfully explored the cc-metric-store codebase and extracted all the key files you requested. Here's what I found:\n\n### Main Entry Point\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go`**\n\nThe main entry point orchestrates the application startup with these key operations:\n\n1. **Flag parsing**: Accepts `-config`, `-loglevel`, `-dev`, `-version`, `-gops`, `-logdate` flags\n2. **Initialization sequence**:\n - Initializes cclog (logging)\n - Optionally starts gops agent for debugging\n - Loads config via `ccconf.Init()`\n - Gets main config and initializes it\n - Initializes NATS client (optional)\n - Starts runServer with context\n\n3. **Server startup** (`runServer` function):\n - Initializes metrics config via `config.InitMetrics()`\n - Initializes metricstore via `metricstore.Init()`\n - Sets GC percent to 15 if not configured\n - Optionally sets node provider with backend URL\n - Creates HTTP server via `NewServer()`\n - Manages shutdown signals (SIGINT, SIGTERM)\n - Notifies systemd when ready\n - Gracefully shuts down on termination\n\n### Configuration Management\n\n**Files in `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/`**\n\n**`config.go`** - Main config struct and initialization:\n- `Config` struct with: `Address`, `CertFile`, `KeyFile`, `User`, `Group`, `BackendURL`, `Debug`, `JwtPublicKey`\n- `InitMetrics()` - Parses metric configuration with frequency and aggregation strategy\n- `Init()` - Parses main configuration from JSON with schema validation\n- `metricConfigJSON` struct for metric config parsing\n\n**`schema.go`** - JSON schema for main config validation:\n```\n- addr: server address (e.g., localhost:8080)\n- https-cert-file, https-key-file: TLS configuration\n- user, group: privilege dropping for privileged ports\n- backend-url: cc-backend URL for job queries\n- debug.dump-to-file: dump internal state path\n- debug.gops: enable gops debugging\n- jwt-public-key: Ed25519 public key for JWT verification\n```\n\n**`metricSchema.go`** - JSON schema for metrics validation:\n- Each metric has `frequency` (sampling frequency in seconds) and `aggregation` (sum/avg/null)\n\n**`validate.go`** - JSON schema validation:\n- Uses `santhosh-tekuri/jsonschema/v5` library\n- Validates configurations against schemas\n\n### Configuration Template\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`**\n\nComplete configuration with:\n- **main section**: Server address (0.0.0.0:8082), JWT public key, optional HTTPS\n- **nats section**: NATS connection details (address, username, password)\n- **metric-store section**:\n - Checkpoints: interval (12h), directory\n - Memory cap: 100\n - Retention: 48h\n - Cleanup: archive mode, interval, directory\n - NATS subscriptions with cluster tags\n- **metrics section**: 40+ metrics with frequency and aggregation strategies (CPU, memory, GPU, network, file metrics)\n\n### Server Setup\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/server.go`**\n\n- `NewServer()` - Creates server instance and calls init\n- `init()` - Mounts routes via `api.MountRoutes()`, optionally adds Swagger UI\n- `Start()` - Sets up HTTP/HTTPS listener with timeouts (30s read/write), TLS if configured, drops privileges, serves\n- `Shutdown()` - **Critical shutdown sequence**:\n 1. Closes NATS client if connected (`nats.GetClient().Close()`)\n 2. Gracefully shuts down HTTP server (30s timeout)\n 3. Archives all metric store data (`metricstore.Shutdown()`)\n\n### NATS Integration\n\nFound in main.go and server.go:\n\n**Initialization** (main.go lines 156-160):\n```go\nnatsConfig := ccconf.GetPackageConfig(\"nats\")\nif err := nats.Init(natsConfig); err != nil {\n cclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n}\nnats.Connect()\n```\n\n**Shutdown** (server.go lines 130-133):\n```go\nnc := nats.GetClient()\nif nc != nil {\n nc.Close()\n}\n```\n\nThe NATS module is imported from `github.com/ClusterCockpit/cc-lib/v2/nats` and is optional (warnings, not errors).\n\n### API Endpoints\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/api.go`** and related files\n\n**Route mounting** (`api.go`):\n- All endpoints support optional JWT authentication (Ed25519)\n- POST /api/write/ - Receive metrics in InfluxDB line protocol\n- GET /api/query/ - Query metrics with selectors\n- POST /api/free/ - Free buffers up to timestamp\n- GET /api/debug/ - Dump internal state\n- GET /api/healthcheck/ - Node health status\n\n**Authentication** (`authentication.go`):\n- Validates JWT tokens with Ed25519 signatures\n- Caches valid tokens for performance\n- Returns 401 Unauthorized if missing or invalid\n\n**Metric Store** (`metricstore.go`):\n- Reads/writes metrics via `metricstore.MemoryStore`\n- Supports hierarchical selectors (cluster → host → resource type)\n- Scaling, statistics, and padding operations\n\n**Node Provider** (`nodeprovider.go`):\n- Queries cc-backend for used nodes\n- 10-second timeout for backend queries\n\n### All Relevant Files (Absolute Paths)\n\n1. `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go`\n2. `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/server.go`\n3. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/config.go`\n4. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/schema.go`\n5. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/metricSchema.go`\n6. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/validate.go`\n7. `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n8. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/api.go`\n9. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/server.go` (separate from cmd/server.go)\n10. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/metricstore.go`\n11. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/authentication.go`\n12. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/nodeprovider.go`"},{"type":"text","text":"agentId: ac332d8e505687c35 (use SendMessage with to: 'ac332d8e505687c35' to continue this agent)\n<usage>total_tokens: 40172\ntool_uses: 19\nduration_ms: 96723</usage>"}]}]},"uuid":"c72116ab-df0f-432f-abc1-6c0540c9c764","timestamp":"2026-04-01T13:17:25.165Z","toolUseResult":{"status":"completed","prompt":"Explore the cc-metric-store codebase at /Users/jan/prg/ClusterCockpit/cc-metric-store. Focus on:\n\n1. The main entry point: cmd/cc-metric-store/main.go - read it fully\n2. The config loading: internal/config/ - read all files\n3. The config template: configs/config.json\n4. Any NATS-related code\n5. How the metric store is initialized and shut down\n\nReturn the full content of all relevant files.","agentId":"ac332d8e505687c35","content":[{"type":"text","text":"Perfect! I have now explored all the relevant files. Let me provide you with a comprehensive summary of the findings:\n\n## Exploration Summary: cc-metric-store Codebase\n\nI have successfully explored the cc-metric-store codebase and extracted all the key files you requested. Here's what I found:\n\n### Main Entry Point\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go`**\n\nThe main entry point orchestrates the application startup with these key operations:\n\n1. **Flag parsing**: Accepts `-config`, `-loglevel`, `-dev`, `-version`, `-gops`, `-logdate` flags\n2. **Initialization sequence**:\n - Initializes cclog (logging)\n - Optionally starts gops agent for debugging\n - Loads config via `ccconf.Init()`\n - Gets main config and initializes it\n - Initializes NATS client (optional)\n - Starts runServer with context\n\n3. **Server startup** (`runServer` function):\n - Initializes metrics config via `config.InitMetrics()`\n - Initializes metricstore via `metricstore.Init()`\n - Sets GC percent to 15 if not configured\n - Optionally sets node provider with backend URL\n - Creates HTTP server via `NewServer()`\n - Manages shutdown signals (SIGINT, SIGTERM)\n - Notifies systemd when ready\n - Gracefully shuts down on termination\n\n### Configuration Management\n\n**Files in `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/`**\n\n**`config.go`** - Main config struct and initialization:\n- `Config` struct with: `Address`, `CertFile`, `KeyFile`, `User`, `Group`, `BackendURL`, `Debug`, `JwtPublicKey`\n- `InitMetrics()` - Parses metric configuration with frequency and aggregation strategy\n- `Init()` - Parses main configuration from JSON with schema validation\n- `metricConfigJSON` struct for metric config parsing\n\n**`schema.go`** - JSON schema for main config validation:\n```\n- addr: server address (e.g., localhost:8080)\n- https-cert-file, https-key-file: TLS configuration\n- user, group: privilege dropping for privileged ports\n- backend-url: cc-backend URL for job queries\n- debug.dump-to-file: dump internal state path\n- debug.gops: enable gops debugging\n- jwt-public-key: Ed25519 public key for JWT verification\n```\n\n**`metricSchema.go`** - JSON schema for metrics validation:\n- Each metric has `frequency` (sampling frequency in seconds) and `aggregation` (sum/avg/null)\n\n**`validate.go`** - JSON schema validation:\n- Uses `santhosh-tekuri/jsonschema/v5` library\n- Validates configurations against schemas\n\n### Configuration Template\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`**\n\nComplete configuration with:\n- **main section**: Server address (0.0.0.0:8082), JWT public key, optional HTTPS\n- **nats section**: NATS connection details (address, username, password)\n- **metric-store section**:\n - Checkpoints: interval (12h), directory\n - Memory cap: 100\n - Retention: 48h\n - Cleanup: archive mode, interval, directory\n - NATS subscriptions with cluster tags\n- **metrics section**: 40+ metrics with frequency and aggregation strategies (CPU, memory, GPU, network, file metrics)\n\n### Server Setup\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/server.go`**\n\n- `NewServer()` - Creates server instance and calls init\n- `init()` - Mounts routes via `api.MountRoutes()`, optionally adds Swagger UI\n- `Start()` - Sets up HTTP/HTTPS listener with timeouts (30s read/write), TLS if configured, drops privileges, serves\n- `Shutdown()` - **Critical shutdown sequence**:\n 1. Closes NATS client if connected (`nats.GetClient().Close()`)\n 2. Gracefully shuts down HTTP server (30s timeout)\n 3. Archives all metric store data (`metricstore.Shutdown()`)\n\n### NATS Integration\n\nFound in main.go and server.go:\n\n**Initialization** (main.go lines 156-160):\n```go\nnatsConfig := ccconf.GetPackageConfig(\"nats\")\nif err := nats.Init(natsConfig); err != nil {\n cclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n}\nnats.Connect()\n```\n\n**Shutdown** (server.go lines 130-133):\n```go\nnc := nats.GetClient()\nif nc != nil {\n nc.Close()\n}\n```\n\nThe NATS module is imported from `github.com/ClusterCockpit/cc-lib/v2/nats` and is optional (warnings, not errors).\n\n### API Endpoints\n\n**File: `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/api.go`** and related files\n\n**Route mounting** (`api.go`):\n- All endpoints support optional JWT authentication (Ed25519)\n- POST /api/write/ - Receive metrics in InfluxDB line protocol\n- GET /api/query/ - Query metrics with selectors\n- POST /api/free/ - Free buffers up to timestamp\n- GET /api/debug/ - Dump internal state\n- GET /api/healthcheck/ - Node health status\n\n**Authentication** (`authentication.go`):\n- Validates JWT tokens with Ed25519 signatures\n- Caches valid tokens for performance\n- Returns 401 Unauthorized if missing or invalid\n\n**Metric Store** (`metricstore.go`):\n- Reads/writes metrics via `metricstore.MemoryStore`\n- Supports hierarchical selectors (cluster → host → resource type)\n- Scaling, statistics, and padding operations\n\n**Node Provider** (`nodeprovider.go`):\n- Queries cc-backend for used nodes\n- 10-second timeout for backend queries\n\n### All Relevant Files (Absolute Paths)\n\n1. `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go`\n2. `/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/server.go`\n3. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/config.go`\n4. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/schema.go`\n5. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/metricSchema.go`\n6. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/validate.go`\n7. `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n8. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/api.go`\n9. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/server.go` (separate from cmd/server.go)\n10. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/metricstore.go`\n11. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/authentication.go`\n12. `/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/api/nodeprovider.go`"}],"totalDurationMs":96723,"totalTokens":40172,"totalToolUseCount":19,"usage":{"input_tokens":5,"cache_creation_input_tokens":2629,"cache_read_input_tokens":35607,"output_tokens":1931,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":2629},"inference_geo":"","iterations":[],"speed":"standard"}},"sourceToolAssistantUUID":"8f174596-9627-4e21-bb50-76f6adb95c7b","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"dbb47c14-5527-41e5-afda-46d6ca080d75","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01KmPV3xRjh1PgVGznwkVDdn","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides config.go: Configuration structures and metric management.\n 7→//\n 8→// # Configuration Hierarchy\n 9→//\n 10→// The metricstore package uses nested configuration structures:\n 11→//\n 12→//\tMetricStoreConfig (Keys)\n 13→//\t├─ NumWorkers: Parallel checkpoint/archive workers\n 14→//\t├─ RetentionInMemory: How long to keep data in RAM (also used as cleanup interval)\n 15→//\t├─ MemoryCap: Memory limit in bytes (triggers forceFree)\n 16→//\t├─ Checkpoints: Persistence configuration\n 17→//\t│ ├─ FileFormat: \"json\" or \"wal\" (default: \"wal\")\n 18→//\t│ └─ RootDir: Checkpoint storage path\n 19→//\t├─ Cleanup: Long-term storage configuration (interval = RetentionInMemory)\n 20→//\t│ ├─ RootDir: Archive storage path (archive mode only)\n 21→//\t│ └─ Mode: \"delete\" or \"archive\"\n 22→//\t├─ Debug: Development/debugging options\n 23→//\t└─ Subscriptions: NATS topic subscriptions for metric ingestion\n 24→//\n 25→// # Metric Configuration\n 26→//\n 27→// Each metric (e.g., \"cpu_load\", \"mem_used\") has a MetricConfig entry in the global\n 28→// Metrics map, defining:\n 29→//\n 30→// - Frequency: Measurement interval in seconds\n 31→// - Aggregation: How to combine values (sum/avg/none) when transforming scopes\n 32→// - offset: Internal index into Level.metrics slice (assigned during Init)\n 33→//\n 34→// # AggregationStrategy\n 35→//\n 36→// Determines how to combine metric values when aggregating from finer to coarser scopes:\n 37→//\n 38→// - NoAggregation: Do not combine (incompatible scopes)\n 39→// - SumAggregation: Add values (e.g., power consumption: core→socket)\n 40→// - AvgAggregation: Average values (e.g., temperature: core→socket)\n 41→package metricstore\n 42→\n 43→import (\n 44→\t\"fmt\"\n 45→\t\"time\"\n 46→\n 47→\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n 48→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 49→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 50→)\n 51→\n 52→const (\n 53→\tDefaultMaxWorkers = 10\n 54→\tDefaultBufferCapacity = 512\n 55→\tDefaultGCTriggerInterval = 100\n 56→\tDefaultMemoryUsageTrackerInterval = 5 * time.Minute\n 57→)\n 58→\n 59→// Checkpoints configures periodic persistence of in-memory metric data.\n 60→//\n 61→// Fields:\n 62→// - FileFormat: \"json\" (human-readable, periodic) or \"wal\" (binary snapshot + WAL, crash-safe); default is \"wal\"\n 63→// - RootDir: Filesystem path for checkpoint files (created if missing)\n 64→// - MaxWALSize: Maximum size in bytes for a single host's WAL file; 0 = unlimited (default).\n 65→// When exceeded the WAL is force-rotated to prevent unbounded disk growth.\n 66→type Checkpoints struct {\n 67→\tFileFormat string `json:\"file-format\"`\n 68→\tRootDir string `json:\"directory\"`\n 69→\tMaxWALSize int64 `json:\"max-wal-size,omitempty\"`\n 70→}\n 71→\n 72→// Debug provides development and profiling options.\n 73→//\n 74→// Fields:\n 75→// - DumpToFile: Path to dump checkpoint data for inspection (empty = disabled)\n 76→// - EnableGops: Enable gops agent for live runtime debugging (https://github.com/google/gops)\n 77→type Debug struct {\n 78→\tDumpToFile string `json:\"dump-to-file\"`\n 79→\tEnableGops bool `json:\"gops\"`\n 80→}\n 81→\n 82→// Cleanup configures long-term storage of old metric data.\n 83→//\n 84→// Data older than RetentionInMemory is archived to disk or deleted.\n 85→// The cleanup interval is always RetentionInMemory.\n 86→//\n 87→// Fields:\n 88→// - RootDir: Filesystem path for archived data (used in \"archive\" mode)\n 89→// - Mode: \"delete\" (discard old data) or \"archive\" (write to RootDir)\n 90→type Cleanup struct {\n 91→\tRootDir string `json:\"directory\"`\n 92→\tMode string `json:\"mode\"`\n 93→}\n 94→\n 95→// Subscriptions defines NATS topics to subscribe to for metric ingestion.\n 96→//\n 97→// Each subscription receives metrics via NATS messaging, enabling real-time\n 98→// data collection from compute nodes.\n 99→//\n 100→// Fields:\n 101→// - SubscribeTo: NATS subject/channel name (e.g., \"metrics.compute.*\")\n 102→// - ClusterTag: Default cluster name for metrics without cluster tag (optional)\n 103→type Subscriptions []struct {\n 104→\t// Channel name\n 105→\tSubscribeTo string `json:\"subscribe-to\"`\n 106→\n 107→\t// Allow lines without a cluster tag, use this as default, optional\n 108→\tClusterTag string `json:\"cluster-tag\"`\n 109→}\n 110→\n 111→// MetricStoreConfig defines the main configuration for the metricstore.\n 112→//\n 113→// Loaded from cc-backend's config.json \"metricstore\" section. Controls memory usage,\n 114→// persistence, archiving, and metric ingestion.\n 115→//\n 116→// Fields:\n 117→// - NumWorkers: Parallel workers for checkpoint/archive (0 = auto: min(NumCPU/2+1, 10))\n 118→// - RetentionInMemory: Duration string (e.g., \"48h\") for in-memory data retention\n 119→// - MemoryCap: Max memory in GB for buffer data (0 = unlimited); triggers forceFree when exceeded\n 120→// - Checkpoints: Periodic persistence configuration\n 121→// - Debug: Development/profiling options (nil = disabled)\n 122→// - Archive: Long-term storage configuration (nil = disabled)\n 123→// - Subscriptions: NATS topics for metric ingestion (nil = polling only)\n 124→type MetricStoreConfig struct {\n 125→\t// Number of concurrent workers for checkpoint and archive operations.\n 126→\t// If not set or 0, defaults to min(runtime.NumCPU()/2+1, 10)\n 127→\tNumWorkers int `json:\"num-workers\"`\n 128→\tRetentionInMemory string `json:\"retention-in-memory\"`\n 129→\tCheckpointInterval string `json:\"checkpoint-interval,omitempty\"`\n 130→\tMemoryCap int `json:\"memory-cap\"`\n 131→\tCheckpoints Checkpoints `json:\"checkpoints\"`\n 132→\tDebug *Debug `json:\"debug\"`\n 133→\tCleanup *Cleanup `json:\"cleanup\"`\n 134→\tSubscriptions *Subscriptions `json:\"nats-subscriptions\"`\n 135→}\n 136→\n 137→// Keys is the global metricstore configuration instance.\n 138→//\n 139→// Initialized with defaults, then overwritten by cc-backend's config.json.\n 140→// Accessed by Init(), Checkpointing(), and other lifecycle functions.\n 141→var Keys MetricStoreConfig = MetricStoreConfig{\n 142→\tCheckpoints: Checkpoints{\n 143→\t\tFileFormat: \"wal\",\n 144→\t\tRootDir: \"./var/checkpoints\",\n 145→\t},\n 146→\tCleanup: &Cleanup{\n 147→\t\tMode: \"delete\",\n 148→\t},\n 149→}\n 150→\n 151→// AggregationStrategy defines how to combine metric values across hierarchy levels.\n 152→//\n 153→// Used when transforming data from finer-grained scopes (e.g., core) to coarser scopes\n 154→// (e.g., socket). This is SPATIAL aggregation, not TEMPORAL (time-based) aggregation.\n 155→//\n 156→// Values:\n 157→// - NoAggregation: Do not aggregate (incompatible scopes or non-aggregatable metrics)\n 158→// - SumAggregation: Add values (e.g., power: sum core power → socket power)\n 159→// - AvgAggregation: Average values (e.g., temperature: average core temps → socket temp)\n 160→type AggregationStrategy int\n 161→\n 162→const (\n 163→\tNoAggregation AggregationStrategy = iota // Do not aggregate\n 164→\tSumAggregation // Sum values (e.g., power, energy)\n 165→\tAvgAggregation // Average values (e.g., temperature, utilization)\n 166→)\n 167→\n 168→// AssignAggregationStrategy parses a string into an AggregationStrategy value.\n 169→//\n 170→// Used when loading metric configurations from JSON/YAML files.\n 171→//\n 172→// Parameters:\n 173→// - str: \"sum\", \"avg\", or \"\" (empty string for NoAggregation)\n 174→//\n 175→// Returns:\n 176→// - AggregationStrategy: Parsed value\n 177→// - error: Non-nil if str is unrecognized\n 178→func AssignAggregationStrategy(str string) (AggregationStrategy, error) {\n 179→\tswitch str {\n 180→\tcase \"\":\n 181→\t\treturn NoAggregation, nil\n 182→\tcase \"sum\":\n 183→\t\treturn SumAggregation, nil\n 184→\tcase \"avg\":\n 185→\t\treturn AvgAggregation, nil\n 186→\tdefault:\n 187→\t\treturn NoAggregation, fmt.Errorf(\"[METRICSTORE]> unknown aggregation strategy: %s\", str)\n 188→\t}\n 189→}\n 190→\n 191→// MetricConfig defines configuration for a single metric type.\n 192→//\n 193→// Stored in the global Metrics map, keyed by metric name (e.g., \"cpu_load\").\n 194→//\n 195→// Fields:\n 196→// - Frequency: Measurement interval in seconds (e.g., 60 for 1-minute granularity)\n 197→// - Aggregation: How to combine values across hierarchy levels (sum/avg/none)\n 198→// - offset: Internal index into Level.metrics slice (assigned during Init)\n 199→type MetricConfig struct {\n 200→\t// Interval in seconds at which measurements are stored\n 201→\tFrequency int64\n 202→\n 203→\t// Can be 'sum', 'avg' or null. Describes how to aggregate metrics from the same timestep over the hierarchy.\n 204→\tAggregation AggregationStrategy\n 205→\n 206→\t// Private, used internally...\n 207→\toffset int\n 208→}\n 209→\n 210→func BuildMetricList() map[string]MetricConfig {\n 211→\tvar metrics map[string]MetricConfig = make(map[string]MetricConfig)\n 212→\n 213→\taddMetric := func(name string, metric MetricConfig) error {\n 214→\t\tif metrics == nil {\n 215→\t\t\tmetrics = make(map[string]MetricConfig, 0)\n 216→\t\t}\n 217→\n 218→\t\tif existingMetric, ok := metrics[name]; ok {\n 219→\t\t\tif existingMetric.Frequency != metric.Frequency {\n 220→\t\t\t\tif existingMetric.Frequency < metric.Frequency {\n 221→\t\t\t\t\texistingMetric.Frequency = metric.Frequency\n 222→\t\t\t\t\tmetrics[name] = existingMetric\n 223→\t\t\t\t}\n 224→\t\t\t}\n 225→\t\t} else {\n 226→\t\t\tmetrics[name] = metric\n 227→\t\t}\n 228→\n 229→\t\treturn nil\n 230→\t}\n 231→\n 232→\t// Helper function to add metric configuration\n 233→\taddMetricConfig := func(mc *schema.MetricConfig) {\n 234→\t\tagg, err := AssignAggregationStrategy(mc.Aggregation)\n 235→\t\tif err != nil {\n 236→\t\t\tcclog.Warnf(\"Could not find aggregation strategy for metric config '%s': %s\", mc.Name, err.Error())\n 237→\t\t}\n 238→\n 239→\t\taddMetric(mc.Name, MetricConfig{\n 240→\t\t\tFrequency: int64(mc.Timestep),\n 241→\t\t\tAggregation: agg,\n 242→\t\t})\n 243→\t}\n 244→\tfor _, c := range archive.Clusters {\n 245→\t\tfor _, mc := range c.MetricConfig {\n 246→\t\t\taddMetricConfig(mc)\n 247→\t\t}\n 248→\n 249→\t\tfor _, sc := range c.SubClusters {\n 250→\t\t\tfor _, mc := range sc.MetricConfig {\n 251→\t\t\t\taddMetricConfig(mc)\n 252→\t\t\t}\n 253→\t\t}\n 254→\t}\n 255→\n 256→\treturn metrics\n 257→}\n 258→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"0c1a5f66-b6f0-4e7c-8402-8a8191ddb9e5","timestamp":"2026-04-01T13:17:37.868Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"d2b4b82e-57ad-4757-818b-6fe0e3545528","timestamp":"2026-04-01T13:17:37.869Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"edeaeed5-b989-4658-b3de-fbbe5161800b","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01RM2r41xUE44wobU8Tuom5Q","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package metricstore\n 7→\n 8→const configSchema = `{\n 9→ \"type\": \"object\",\n 10→ \"description\": \"Configuration specific to built-in metric-store.\",\n 11→ \"properties\": {\n 12→ \"num-workers\": {\n 13→ \"description\": \"Number of concurrent workers for checkpoint and archive operations\",\n 14→ \"type\": \"integer\"\n 15→ },\n 16→ \"checkpoints\": {\n 17→ \"description\": \"Configuration for checkpointing the metrics buffers\",\n 18→ \"type\": \"object\",\n 19→ \"properties\": {\n 20→ \"file-format\": {\n 21→ \"description\": \"Specify the format for checkpoint files. Two variants: 'json' (human-readable, periodic) and 'wal' (binary snapshot + Write-Ahead Log, crash-safe). Default is 'wal'.\",\n 22→ \"type\": \"string\"\n 23→ },\n 24→ \"directory\": {\n 25→ \"description\": \"Path in which the checkpointed files should be placed.\",\n 26→ \"type\": \"string\"\n 27→ },\n 28→ \"max-wal-size\": {\n 29→ \"description\": \"Maximum size in bytes for a single host's WAL file. When exceeded the WAL is force-rotated to prevent unbounded disk growth. Only applies when file-format is 'wal'. 0 means unlimited (default).\",\n 30→ \"type\": \"integer\",\n 31→ \"minimum\": 0\n 32→ }\n 33→ }\n 34→ },\n 35→ \"cleanup\": {\n 36→ \"description\": \"Configuration for the cleanup process. The cleanup interval is always 'retention-in-memory'.\",\n 37→ \"type\": \"object\",\n 38→ \"properties\": {\n 39→ \"mode\": {\n 40→ \"description\": \"The operation mode (e.g., 'archive' or 'delete').\",\n 41→ \"type\": \"string\",\n 42→ \"enum\": [\"archive\", \"delete\"]\n 43→ },\n 44→ \"directory\": {\n 45→ \"description\": \"Target directory for archive operations.\",\n 46→ \"type\": \"string\"\n 47→ }\n 48→ },\n 49→ \"if\": {\n 50→ \"properties\": {\n 51→ \"mode\": { \"const\": \"archive\" }\n 52→ }\n 53→ },\n 54→ \"then\": {\n 55→ \"required\": [\"directory\"]\n 56→ }\n 57→ },\n 58→ \"retention-in-memory\": {\n 59→ \"description\": \"Keep the metrics within memory for given time interval. Retention for X hours, then the metrics would be freed.\",\n 60→ \"type\": \"string\"\n 61→ },\n 62→ \"checkpoint-interval\": {\n 63→ \"description\": \"Interval between checkpoints as a Go duration string (e.g., '12h', '6h', '30m'). Default is '12h'.\",\n 64→ \"type\": \"string\"\n 65→ },\n 66→ \"memory-cap\": {\n 67→ \"description\": \"Upper memory capacity limit used by metricstore in GB\",\n 68→ \"type\": \"integer\"\n 69→ },\n 70→ \"nats-subscriptions\": {\n 71→ \"description\": \"Array of various subscriptions. Allows to subscribe to different subjects and publishers.\",\n 72→ \"type\": \"array\",\n 73→ \"items\": {\n 74→ \"type\": \"object\",\n 75→ \"properties\": {\n 76→ \"subscribe-to\": {\n 77→ \"description\": \"Subject name\",\n 78→ \"type\": \"string\"\n 79→ },\n 80→ \"cluster-tag\": {\n 81→ \"description\": \"Optional: Allow lines without a cluster tag, use this as default\",\n 82→ \"type\": \"string\"\n 83→ }\n 84→ },\n 85→\t\t\t\t\"required\": [\"subscribe-to\"]\n 86→ }\n 87→ }\n 88→ },\n 89→ \"required\": [\"retention-in-memory\", \"memory-cap\"]\n 90→}`\n 91→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"7f443030-5c7a-4f53-9db9-72006e3d7b78","timestamp":"2026-04-01T13:17:37.957Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"dd360543-150e-466a-a0a7-5cbe80a80b51","timestamp":"2026-04-01T13:17:37.958Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"dd360543-150e-466a-a0a7-5cbe80a80b51","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01JBN2MqQmBTBamaS3Ark2fE","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides an efficient in-memory time-series metric storage system\n 7→// with support for hierarchical data organization, checkpointing, and archiving.\n 8→//\n 9→// The package organizes metrics in a tree structure (cluster → host → component) and\n 10→// provides concurrent read/write access to metric data with configurable aggregation strategies.\n 11→// Background goroutines handle periodic checkpointing (JSON or WAL/binary format), archiving old data,\n 12→// and enforcing retention policies.\n 13→//\n 14→// Key features:\n 15→// - In-memory metric storage with configurable retention\n 16→// - Hierarchical data organization (selectors)\n 17→// - Concurrent checkpoint/archive workers\n 18→// - Support for sum and average aggregation\n 19→// - NATS integration for metric ingestion via InfluxDB line protocol\n 20→package metricstore\n 21→\n 22→import (\n 23→\t\"bytes\"\n 24→\t\"context\"\n 25→\t\"encoding/json\"\n 26→\t\"errors\"\n 27→\t\"fmt\"\n 28→\t\"runtime\"\n 29→\t\"runtime/debug\"\n 30→\t\"slices\"\n 31→\t\"sync\"\n 32→\t\"time\"\n 33→\n 34→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n 35→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 36→\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n 37→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 38→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 39→)\n 40→\n 41→// GlobalState holds the global state for the metric store with thread-safe access.\n 42→type GlobalState struct {\n 43→\tmu sync.RWMutex\n 44→\tlastRetentionTime int64\n 45→\tselectorsExcluded bool\n 46→}\n 47→\n 48→var (\n 49→\tsingleton sync.Once\n 50→\tmsInstance *MemoryStore\n 51→\t// shutdownFunc stores the context cancellation function created in Init\n 52→\t// and is called during Shutdown to cancel all background goroutines\n 53→\tshutdownFunc context.CancelFunc\n 54→\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n 55→\t// Create a global instance\n 56→\tstate = &GlobalState{}\n 57→)\n 58→\n 59→// NodeProvider provides information about nodes currently in use by running jobs.\n 60→//\n 61→// This interface allows metricstore to query job information without directly\n 62→// depending on the repository package, breaking the import cycle.\n 63→//\n 64→// Implementations should return nodes that are actively processing jobs started\n 65→// before the given timestamp. These nodes will be excluded from retention-based\n 66→// garbage collection to prevent data loss for jobs that are still running or\n 67→// recently completed.\n 68→type NodeProvider interface {\n 69→\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n 70→\t// that are currently in use by jobs that started before the given timestamp.\n 71→\t//\n 72→\t// Parameters:\n 73→\t// - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n 74→\t//\n 75→\t// Returns:\n 76→\t// - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n 77→\t// - Error if the query fails\n 78→\tGetUsedNodes(ts int64) (map[string][]string, error)\n 79→}\n 80→\n 81→// Metric represents a single metric data point to be written to the store.\n 82→type Metric struct {\n 83→\tName string\n 84→\tValue schema.Float\n 85→\t// MetricConfig contains frequency and aggregation settings for this metric.\n 86→\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n 87→\tMetricConfig MetricConfig\n 88→}\n 89→\n 90→// MemoryStore is the main in-memory time-series metric storage implementation.\n 91→//\n 92→// It organizes metrics in a hierarchical tree structure where each level represents\n 93→// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n 94→// store multiple metrics as time-series buffers.\n 95→//\n 96→// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n 97→// All public methods are safe for concurrent use.\n 98→type MemoryStore struct {\n 99→\tMetrics map[string]MetricConfig\n 100→\troot Level\n 101→\tnodeProvider NodeProvider\n 102→}\n 103→\n 104→// Init initializes the metric store from configuration and starts background workers.\n 105→//\n 106→// This function must be called exactly once before any other metricstore operations.\n 107→// It performs the following initialization steps:\n 108→// 1. Validates and decodes the metric store configuration\n 109→// 2. Configures worker pool size (defaults to NumCPU/2+1, max 10)\n 110→// 3. Loads metric configurations from all registered clusters\n 111→// 4. Restores checkpoints within the retention window\n 112→// 5. Starts background workers for retention, checkpointing, archiving, and monitoring\n 113→// 6. Optionally subscribes to NATS for real-time metric ingestion\n 114→//\n 115→// Parameters:\n 116→// - rawConfig: JSON configuration for the metric store (see MetricStoreConfig); may be nil to use defaults\n 117→// - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n 118→// - wg: WaitGroup that will be incremented for each background goroutine started\n 119→//\n 120→// The function will call cclog.Fatal on critical errors during initialization.\n 121→// Use Shutdown() to cleanly stop all background workers started by Init().\n 122→//\n 123→// Note: Signal handling must be implemented by the caller. Call Shutdown() when\n 124→// receiving termination signals to ensure checkpoint data is persisted.\n 125→func Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n 126→\tstartupTime := time.Now()\n 127→\n 128→\tif rawConfig != nil {\n 129→\t\tconfig.Validate(configSchema, rawConfig)\n 130→\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n 131→\t\tdec.DisallowUnknownFields()\n 132→\t\tif err := dec.Decode(&Keys); err != nil {\n 133→\t\t\tcclog.Abortf(\"[METRICSTORE]> Metric Store Config Init: Could not decode config file '%s'.\\nError: %s\\n\", rawConfig, err.Error())\n 134→\t\t}\n 135→\t}\n 136→\n 137→\t// Set NumWorkers from config or use default\n 138→\tif Keys.NumWorkers <= 0 {\n 139→\t\tKeys.NumWorkers = min(runtime.NumCPU()/2+1, DefaultMaxWorkers)\n 140→\t}\n 141→\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n 142→\n 143→\t// Pass the config.MetricStoreKeys\n 144→\tInitMetrics(metrics)\n 145→\n 146→\tms := GetMemoryStore()\n 147→\n 148→\td, err := time.ParseDuration(Keys.RetentionInMemory)\n 149→\tif err != nil {\n 150→\t\tcclog.Fatal(err)\n 151→\t}\n 152→\n 153→\trestoreFrom := startupTime.Add(-d)\n 154→\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n 155→\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n 156→\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n 157→\tif err != nil {\n 158→\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n 159→\t} else {\n 160→\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n 161→\t}\n 162→\n 163→\t// Try to use less memory by forcing a GC run here and then\n 164→\t// lowering the target percentage. The default of 100 means\n 165→\t// that only once the ratio of new allocations execeds the\n 166→\t// previously active heap, a GC is triggered.\n 167→\t// Forcing a GC here will set the \"previously active heap\"\n 168→\t// to a minumum.\n 169→\t// runtime.GC()\n 170→\n 171→\tctx, shutdown := context.WithCancel(context.Background())\n 172→\n 173→\tRetention(wg, ctx)\n 174→\tCheckpointing(wg, ctx)\n 175→\tCleanUp(wg, ctx)\n 176→\tWALStaging(wg, ctx)\n 177→\tMemoryUsageTracker(wg, ctx)\n 178→\n 179→\t// Note: Signal handling has been removed from this function.\n 180→\t// The caller is responsible for handling shutdown signals and calling\n 181→\t// the shutdown() function when appropriate.\n 182→\t// Store the shutdown function for later use by Shutdown()\n 183→\tshutdownFuncMu.Lock()\n 184→\tshutdownFunc = shutdown\n 185→\tshutdownFuncMu.Unlock()\n 186→\n 187→\tif Keys.Subscriptions != nil {\n 188→\t\twg.Go(func() {\n 189→\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n 190→\t\t\t\tcclog.Fatal(err)\n 191→\t\t\t}\n 192→\t\t})\n 193→\t}\n 194→}\n 195→\n 196→// InitMetrics initializes the singleton MemoryStore instance with the given metric configurations.\n 197→//\n 198→// This function must be called before GetMemoryStore() and can only be called once due to\n 199→// the singleton pattern. It assigns each metric an internal offset for efficient buffer indexing.\n 200→//\n 201→// Parameters:\n 202→// - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n 203→//\n 204→// Panics if any metric has Frequency == 0, which indicates an invalid configuration.\n 205→//\n 206→// After this call, the global msInstance is ready for use via GetMemoryStore().\n 207→func InitMetrics(metrics map[string]MetricConfig) {\n 208→\tsingleton.Do(func() {\n 209→\t\toffset := 0\n 210→\t\tfor key, cfg := range metrics {\n 211→\t\t\tif cfg.Frequency == 0 {\n 212→\t\t\t\tpanic(\"[METRICSTORE]> invalid frequency\")\n 213→\t\t\t}\n 214→\n 215→\t\t\tmetrics[key] = MetricConfig{\n 216→\t\t\t\tFrequency: cfg.Frequency,\n 217→\t\t\t\tAggregation: cfg.Aggregation,\n 218→\t\t\t\toffset: offset,\n 219→\t\t\t}\n 220→\t\t\toffset += 1\n 221→\t\t}\n 222→\n 223→\t\tmsInstance = &MemoryStore{\n 224→\t\t\troot: Level{\n 225→\t\t\t\tmetrics: make([]*buffer, len(metrics)),\n 226→\t\t\t\tchildren: make(map[string]*Level),\n 227→\t\t\t},\n 228→\t\t\tMetrics: metrics,\n 229→\t\t}\n 230→\t})\n 231→}\n 232→\n 233→// GetMemoryStore returns the singleton MemoryStore instance.\n 234→//\n 235→// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n 236→//\n 237→// This function is safe for concurrent use after initialization.\n 238→func GetMemoryStore() *MemoryStore {\n 239→\tif msInstance == nil {\n 240→\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n 241→\t}\n 242→\n 243→\treturn msInstance\n 244→}\n 245→\n 246→func (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n 247→\tif metric, ok := ms.Metrics[metricName]; ok {\n 248→\t\treturn metric.Frequency, nil\n 249→\t}\n 250→\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n 251→}\n 252→\n 253→// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n 254→// This must be called during initialization to provide job state information\n 255→// for selective buffer retention during Free operations.\n 256→// If not set, the Free function will fall back to freeing all buffers.\n 257→func (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n 258→\tms.nodeProvider = provider\n 259→}\n 260→\n 261→// Shutdown performs a graceful shutdown of the metric store.\n 262→//\n 263→// This function cancels all background goroutines started by Init() and writes\n 264→// a final checkpoint to disk before returning. It should be called when the\n 265→// application receives a termination signal.\n 266→//\n 267→// The function will:\n 268→// 1. Cancel the context to stop all background workers\n 269→// 2. Close the WAL messages channel if using WAL format\n 270→// 3. Write a final checkpoint to preserve in-memory data\n 271→// 4. Log any errors encountered during shutdown\n 272→//\n 273→// Note: This function blocks until the final checkpoint is written.\n 274→func Shutdown() {\n 275→\ttotalStart := time.Now()\n 276→\n 277→\tshutdownFuncMu.Lock()\n 278→\tdefer shutdownFuncMu.Unlock()\n 279→\tif shutdownFunc != nil {\n 280→\t\tshutdownFunc()\n 281→\t}\n 282→\tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n 283→\n 284→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n 285→\t\t// Signal producers to stop sending before closing channels,\n 286→\t\t// preventing send-on-closed-channel panics from in-flight NATS workers.\n 287→\t\twalShuttingDown.Store(true)\n 288→\t\t// Brief grace period for in-flight DecodeLine calls to complete.\n 289→\t\ttime.Sleep(100 * time.Millisecond)\n 290→\n 291→\t\tfor _, ch := range walShardChs {\n 292→\t\t\tclose(ch)\n 293→\t\t}\n 294→\t\tdrainStart := time.Now()\n 295→\t\tWaitForWALStagingDrain()\n 296→\t\tcclog.Infof(\"[METRICSTORE]> WAL staging goroutines exited (%v)\", time.Since(drainStart))\n 297→\t}\n 298→\n 299→\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n 300→\tcheckpointStart := time.Now()\n 301→\tvar files int\n 302→\tvar err error\n 303→\n 304→\tms := GetMemoryStore()\n 305→\n 306→\tlastCheckpointMu.Lock()\n 307→\tfrom := lastCheckpoint\n 308→\tlastCheckpointMu.Unlock()\n 309→\n 310→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n 311→\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n 312→\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n 313→\t} else {\n 314→\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n 315→\t}\n 316→\n 317→\tif err != nil {\n 318→\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n 319→\t}\n 320→\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))\n 321→}\n 322→\n 323→// Retention starts a background goroutine that periodically frees old metric data.\n 324→//\n 325→// This worker runs at half the retention interval and calls Free() to remove buffers\n 326→// older than the configured retention time. It respects the NodeProvider to preserve\n 327→// data for nodes with active jobs.\n 328→//\n 329→// Parameters:\n 330→// - wg: WaitGroup to signal completion when context is cancelled\n 331→// - ctx: Context for cancellation signal\n 332→//\n 333→// The goroutine exits when ctx is cancelled.\n 334→func Retention(wg *sync.WaitGroup, ctx context.Context) {\n 335→\tms := GetMemoryStore()\n 336→\n 337→\twg.Go(func() {\n 338→\t\td, err := time.ParseDuration(Keys.RetentionInMemory)\n 339→\t\tif err != nil {\n 340→\t\t\tcclog.Fatal(err)\n 341→\t\t}\n 342→\t\tif d <= 0 {\n 343→\t\t\treturn\n 344→\t\t}\n 345→\n 346→\t\ttickInterval := d / 2\n 347→\t\tif tickInterval <= 0 {\n 348→\t\t\treturn\n 349→\t\t}\n 350→\t\tticker := time.NewTicker(tickInterval)\n 351→\t\tdefer ticker.Stop()\n 352→\n 353→\t\tfor {\n 354→\t\t\tselect {\n 355→\t\t\tcase <-ctx.Done():\n 356→\t\t\t\treturn\n 357→\t\t\tcase <-ticker.C:\n 358→\t\t\t\tstate.mu.Lock()\n 359→\n 360→\t\t\t\tt := time.Now().Add(-d)\n 361→\n 362→\t\t\t\tstate.lastRetentionTime = t.Unix()\n 363→\n 364→\t\t\t\tcclog.Infof(\"[METRICSTORE]> start freeing buffers (older than %s)...\\n\", t.Format(time.RFC3339))\n 365→\n 366→\t\t\t\tfreed, err := Free(ms, t)\n 367→\t\t\t\tif err != nil {\n 368→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> freeing up buffers failed: %s\\n\", err.Error())\n 369→\t\t\t\t} else {\n 370→\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d buffers freed\\n\", freed)\n 371→\t\t\t\t}\n 372→\n 373→\t\t\t\tstate.mu.Unlock()\n 374→\n 375→\t\t\t\t// Clean up the buffer pool\n 376→\t\t\t\tbufferPool.Clean(state.lastRetentionTime)\n 377→\t\t\t}\n 378→\t\t}\n 379→\t})\n 380→}\n 381→\n 382→// MemoryUsageTracker starts a background goroutine that monitors memory usage.\n 383→//\n 384→// This worker checks actual process memory usage (via runtime.MemStats) periodically\n 385→// and force-frees buffers if memory exceeds the configured cap. It uses FreeOSMemory()\n 386→// to return memory to the OS after freeing buffers, avoiding aggressive GC that causes\n 387→// performance issues.\n 388→//\n 389→// The tracker logs both actual memory usage (heap allocated) and metric data size for\n 390→// visibility into memory overhead from Go runtime structures and allocations.\n 391→//\n 392→// Parameters:\n 393→// - wg: WaitGroup to signal completion when context is cancelled\n 394→// - ctx: Context for cancellation signal\n 395→//\n 396→// The goroutine exits when ctx is cancelled.\n 397→func MemoryUsageTracker(wg *sync.WaitGroup, ctx context.Context) {\n 398→\tms := GetMemoryStore()\n 399→\n 400→\twg.Go(func() {\n 401→\t\tnormalInterval := DefaultMemoryUsageTrackerInterval\n 402→\t\tfastInterval := 30 * time.Second\n 403→\n 404→\t\tif normalInterval <= 0 {\n 405→\t\t\treturn\n 406→\t\t}\n 407→\n 408→\t\tticker := time.NewTicker(normalInterval)\n 409→\t\tdefer ticker.Stop()\n 410→\t\tcurrentInterval := normalInterval\n 411→\n 412→\t\tfor {\n 413→\t\t\tselect {\n 414→\t\t\tcase <-ctx.Done():\n 415→\t\t\t\treturn\n 416→\t\t\tcase <-ticker.C:\n 417→\t\t\t\tvar mem runtime.MemStats\n 418→\t\t\t\truntime.ReadMemStats(&mem)\n 419→\t\t\t\tactualMemoryGB := float64(mem.Alloc) / 1e9\n 420→\t\t\t\tmetricDataGB := ms.SizeInGB()\n 421→\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory usage: %.2f GB actual (%.2f GB metric data)\", actualMemoryGB, metricDataGB)\n 422→\n 423→\t\t\t\tfreedExcluded := 0\n 424→\t\t\t\tfreedEmergency := 0\n 425→\t\t\t\tvar err error\n 426→\n 427→\t\t\t\tstate.mu.RLock()\n 428→\t\t\t\tlastRetention := state.lastRetentionTime\n 429→\t\t\t\tselectorsExcluded := state.selectorsExcluded\n 430→\t\t\t\tstate.mu.RUnlock()\n 431→\n 432→\t\t\t\tif lastRetention != 0 && selectorsExcluded {\n 433→\t\t\t\t\tfreedExcluded, err = ms.Free(nil, lastRetention)\n 434→\t\t\t\t\tif err != nil {\n 435→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while force-freeing the excluded buffers: %s\", err)\n 436→\t\t\t\t\t}\n 437→\n 438→\t\t\t\t\tif freedExcluded > 0 {\n 439→\t\t\t\t\t\tdebug.FreeOSMemory()\n 440→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d excluded buffers force-freed\", freedExcluded)\n 441→\t\t\t\t\t}\n 442→\t\t\t\t}\n 443→\n 444→\t\t\t\truntime.ReadMemStats(&mem)\n 445→\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n 446→\n 447→\t\t\t\tif actualMemoryGB > float64(Keys.MemoryCap) {\n 448→\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> memory usage %.2f GB exceeds cap %d GB, starting emergency buffer freeing\", actualMemoryGB, Keys.MemoryCap)\n 449→\n 450→\t\t\t\t\t// Use progressive time-based Free with increasing threshold\n 451→\t\t\t\t\t// instead of ForceFree loop — fewer tree traversals, more effective\n 452→\t\t\t\t\td, parseErr := time.ParseDuration(Keys.RetentionInMemory)\n 453→\t\t\t\t\tif parseErr != nil {\n 454→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> cannot parse retention duration: %s\", parseErr)\n 455→\t\t\t\t\t} else {\n 456→\t\t\t\t\t\tthresholds := []float64{0.75, 0.5, 0.25}\n 457→\t\t\t\t\t\tfor _, fraction := range thresholds {\n 458→\t\t\t\t\t\t\tthreshold := time.Now().Add(-time.Duration(float64(d) * fraction))\n 459→\t\t\t\t\t\t\tfreed, freeErr := ms.Free(nil, threshold.Unix())\n 460→\t\t\t\t\t\t\tif freeErr != nil {\n 461→\t\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while freeing buffers at %.0f%% retention: %s\", fraction*100, freeErr)\n 462→\t\t\t\t\t\t\t}\n 463→\t\t\t\t\t\t\tfreedEmergency += freed\n 464→\n 465→\t\t\t\t\t\t\tbufferPool.Clear()\n 466→\t\t\t\t\t\t\truntime.GC()\n 467→\t\t\t\t\t\t\truntime.ReadMemStats(&mem)\n 468→\t\t\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n 469→\n 470→\t\t\t\t\t\t\tif actualMemoryGB < float64(Keys.MemoryCap) {\n 471→\t\t\t\t\t\t\t\tbreak\n 472→\t\t\t\t\t\t\t}\n 473→\t\t\t\t\t\t}\n 474→\t\t\t\t\t}\n 475→\n 476→\t\t\t\t\tbufferPool.Clear()\n 477→\t\t\t\t\tdebug.FreeOSMemory()\n 478→\n 479→\t\t\t\t\truntime.ReadMemStats(&mem)\n 480→\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n 481→\n 482→\t\t\t\t\tif actualMemoryGB >= float64(Keys.MemoryCap) {\n 483→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> after emergency frees (%d buffers), memory usage %.2f GB still at/above cap %d GB\", freedEmergency, actualMemoryGB, Keys.MemoryCap)\n 484→\t\t\t\t\t} else {\n 485→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> emergency freeing complete: %d buffers freed, memory now %.2f GB\", freedEmergency, actualMemoryGB)\n 486→\t\t\t\t\t}\n 487→\t\t\t\t}\n 488→\n 489→\t\t\t\t// Adaptive ticker: check more frequently when memory is high\n 490→\t\t\t\tmemoryRatio := actualMemoryGB / float64(Keys.MemoryCap)\n 491→\t\t\t\tif memoryRatio > 0.8 && currentInterval != fastInterval {\n 492→\t\t\t\t\tticker.Reset(fastInterval)\n 493→\t\t\t\t\tcurrentInterval = fastInterval\n 494→\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to fast check interval (30s)\", memoryRatio*100)\n 495→\t\t\t\t} else if memoryRatio <= 0.8 && currentInterval != normalInterval {\n 496→\t\t\t\t\tticker.Reset(normalInterval)\n 497→\t\t\t\t\tcurrentInterval = normalInterval\n 498→\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to normal check interval\", memoryRatio*100)\n 499→\t\t\t\t}\n 500→\t\t\t}\n 501→\t\t}\n 502→\t})\n 503→}\n 504→\n 505→// Free removes metric data older than the given time while preserving data for active nodes.\n 506→//\n 507→// This function implements intelligent retention by consulting the NodeProvider (if configured)\n 508→// to determine which nodes are currently in use by running jobs. Data for these nodes is\n 509→// preserved even if older than the retention time.\n 510→//\n 511→// Parameters:\n 512→// - ms: The MemoryStore instance\n 513→// - t: Time threshold - buffers with data older than this will be freed\n 514→//\n 515→// Returns:\n 516→// - Number of buffers freed\n 517→// - Error if NodeProvider query fails\n 518→//\n 519→// Behavior:\n 520→// - If no NodeProvider is set: frees all buffers older than t\n 521→// - If NodeProvider returns empty map: frees all buffers older than t\n 522→// - Otherwise: preserves buffers for nodes returned by GetUsedNodes(), frees others\n 523→func Free(ms *MemoryStore, t time.Time) (int, error) {\n 524→\t// If no NodeProvider is configured, free all buffers older than t\n 525→\tif ms.nodeProvider == nil {\n 526→\t\treturn ms.Free(nil, t.Unix())\n 527→\t}\n 528→\n 529→\texcludeSelectors, err := ms.nodeProvider.GetUsedNodes(t.Unix())\n 530→\tif err != nil {\n 531→\t\treturn 0, err\n 532→\t}\n 533→\n 534→\tswitch lenMap := len(excludeSelectors); lenMap {\n 535→\n 536→\t// If the length of the map returned by GetUsedNodes() is 0,\n 537→\t// then use default Free method with nil selector\n 538→\tcase 0:\n 539→\t\tstate.selectorsExcluded = false\n 540→\t\treturn ms.Free(nil, t.Unix())\n 541→\n 542→\t// Else formulate selectors, exclude those from the map\n 543→\t// and free the rest of the selectors\n 544→\tdefault:\n 545→\t\tstate.selectorsExcluded = true\n 546→\t\tselectors := GetSelectors(ms, excludeSelectors)\n 547→\t\treturn FreeSelected(ms, selectors, t)\n 548→\t}\n 549→}\n 550→\n 551→// FreeSelected frees buffers for specific selectors while preserving others.\n 552→//\n 553→// This function is used when we want to retain some specific nodes beyond the retention time.\n 554→// It iterates through the provided selectors and frees their associated buffers.\n 555→//\n 556→// Parameters:\n 557→// - ms: The MemoryStore instance\n 558→// - selectors: List of selector paths to free (e.g., [[\"cluster1\", \"node1\"], [\"cluster2\", \"node2\"]])\n 559→// - t: Time threshold for freeing buffers\n 560→//\n 561→// Returns the total number of buffers freed and any error encountered.\n 562→func FreeSelected(ms *MemoryStore, selectors [][]string, t time.Time) (int, error) {\n 563→\tfreed := 0\n 564→\n 565→\tfor _, selector := range selectors {\n 566→\n 567→\t\tfreedBuffers, err := ms.Free(selector, t.Unix())\n 568→\t\tif err != nil {\n 569→\t\t\tcclog.Errorf(\"error while freeing selected buffers: %#v\", err)\n 570→\t\t}\n 571→\t\tfreed += freedBuffers\n 572→\n 573→\t}\n 574→\n 575→\treturn freed, nil\n 576→}\n 577→\n 578→// GetSelectors returns all selectors at depth 2 (cluster/node level) that are NOT in the exclusion map.\n 579→//\n 580→// This function generates a list of selectors whose buffers should be freed by excluding\n 581→// selectors that correspond to nodes currently in use by running jobs.\n 582→//\n 583→// Parameters:\n 584→// - ms: The MemoryStore instance\n 585→// - excludeSelectors: Map of cluster names to node hostnames that should NOT be freed\n 586→//\n 587→// Returns a list of selectors ([]string paths) that can be safely freed.\n 588→//\n 589→// Example:\n 590→//\n 591→//\tIf the tree has paths [\"emmy\", \"node001\"] and [\"emmy\", \"node002\"],\n 592→//\tand excludeSelectors contains {\"emmy\": [\"node001\"]},\n 593→//\tthen only [[\"emmy\", \"node002\"]] is returned.\n 594→func GetSelectors(ms *MemoryStore, excludeSelectors map[string][]string) [][]string {\n 595→\tallSelectors := ms.GetPaths(2)\n 596→\n 597→\tfilteredSelectors := make([][]string, 0, len(allSelectors))\n 598→\n 599→\tfor _, path := range allSelectors {\n 600→\t\tif len(path) < 2 {\n 601→\t\t\tcontinue\n 602→\t\t}\n 603→\n 604→\t\tkey := path[0] // The \"Key\" (Level 1)\n 605→\t\tvalue := path[1] // The \"Value\" (Level 2)\n 606→\n 607→\t\texclude := false\n 608→\n 609→\t\t// Check if the key exists in our exclusion map\n 610→\t\tif excludedValues, exists := excludeSelectors[key]; exists {\n 611→\t\t\t// The key exists, now check if the specific value is in the exclusion list\n 612→\t\t\tif slices.Contains(excludedValues, value) {\n 613→\t\t\t\texclude = true\n 614→\t\t\t}\n 615→\t\t}\n 616→\n 617→\t\tif !exclude {\n 618→\t\t\tfilteredSelectors = append(filteredSelectors, path)\n 619→\t\t}\n 620→\t}\n 621→\n 622→\treturn filteredSelectors\n 623→}\n 624→\n 625→// GetPaths returns a list of lists (paths) to the specified depth.\n 626→func (ms *MemoryStore) GetPaths(targetDepth int) [][]string {\n 627→\tvar results [][]string\n 628→\n 629→\t// Start recursion. Initial path is empty.\n 630→\t// We treat Root as depth 0.\n 631→\tms.root.collectPaths(0, targetDepth, []string{}, &results)\n 632→\n 633→\treturn results\n 634→}\n 635→\n 636→// Write all values in `metrics` to the level specified by `selector` for time `ts`.\n 637→// Look at `findLevelOrCreate` for how selectors work.\n 638→func (m *MemoryStore) Write(selector []string, ts int64, metrics []Metric) error {\n 639→\tvar ok bool\n 640→\tfor i, metric := range metrics {\n 641→\t\tif metric.MetricConfig.Frequency == 0 {\n 642→\t\t\tmetric.MetricConfig, ok = m.Metrics[metric.Name]\n 643→\t\t\tif !ok {\n 644→\t\t\t\tcclog.Debugf(\"[METRICSTORE]> Unknown metric '%s' in Write() - skipping\", metric.Name)\n 645→\t\t\t\tmetric.MetricConfig.Frequency = 0\n 646→\t\t\t}\n 647→\t\t\tmetrics[i] = metric\n 648→\t\t}\n 649→\t}\n 650→\n 651→\treturn m.WriteToLevel(&m.root, selector, ts, metrics)\n 652→}\n 653→\n 654→func (m *MemoryStore) GetLevel(selector []string) *Level {\n 655→\treturn m.root.findLevelOrCreate(selector, len(m.Metrics))\n 656→}\n 657→\n 658→// WriteToLevel assumes that `minfo` in `metrics` is filled in\n 659→func (m *MemoryStore) WriteToLevel(l *Level, selector []string, ts int64, metrics []Metric) error {\n 660→\tl = l.findLevelOrCreate(selector, len(m.Metrics))\n 661→\tl.lock.Lock()\n 662→\tdefer l.lock.Unlock()\n 663→\n 664→\tfor _, metric := range metrics {\n 665→\t\tif metric.MetricConfig.Frequency == 0 {\n 666→\t\t\tcontinue\n 667→\t\t}\n 668→\n 669→\t\tb := l.metrics[metric.MetricConfig.offset]\n 670→\t\tif b == nil {\n 671→\t\t\t// First write to this metric and level\n 672→\t\t\tb = newBuffer(ts, metric.MetricConfig.Frequency)\n 673→\t\t\tl.metrics[metric.MetricConfig.offset] = b\n 674→\t\t}\n 675→\n 676→\t\tnb, err := b.write(ts, metric.Value)\n 677→\t\tif err != nil {\n 678→\t\t\treturn err\n 679→\t\t}\n 680→\n 681→\t\t// Last write created a new buffer...\n 682→\t\tif b != nb {\n 683→\t\t\tl.metrics[metric.MetricConfig.offset] = nb\n 684→\t\t}\n 685→\t}\n 686→\treturn nil\n 687→}\n 688→\n 689→// Read returns all values for metric `metric` from `from` to `to` for the selected level(s).\n 690→// If the level does not hold the metric itself, the data will be aggregated recursively from the children.\n 691→// The second and third return value are the actual from/to for the data. Those can be different from\n 692→// the range asked for if no data was available.\n 693→func (m *MemoryStore) Read(selector util.Selector, metric string, from, to, resolution int64) ([]schema.Float, int64, int64, int64, error) {\n 694→\tif from > to {\n 695→\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid time range\")\n 696→\t}\n 697→\n 698→\tminfo, ok := m.Metrics[metric]\n 699→\tif !ok {\n 700→\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> unknown metric: \" + metric)\n 701→\t}\n 702→\n 703→\tn, data := 0, make([]schema.Float, (to-from)/minfo.Frequency+1)\n 704→\n 705→\terr := m.root.findBuffers(selector, minfo.offset, func(b *buffer) error {\n 706→\t\tcdata, cfrom, cto, err := b.read(from, to, data)\n 707→\t\tif err != nil {\n 708→\t\t\treturn err\n 709→\t\t}\n 710→\n 711→\t\tif n == 0 {\n 712→\t\t\tfrom, to = cfrom, cto\n 713→\t\t} else if from != cfrom || to != cto || len(data) != len(cdata) {\n 714→\t\t\tmissingfront, missingback := int((from-cfrom)/minfo.Frequency), int((to-cto)/minfo.Frequency)\n 715→\t\t\tif missingfront != 0 {\n 716→\t\t\t\treturn ErrDataDoesNotAlignMissingFront\n 717→\t\t\t}\n 718→\n 719→\t\t\tnewlen := len(cdata) - missingback\n 720→\t\t\tif newlen < 1 {\n 721→\t\t\t\treturn ErrDataDoesNotAlignMissingBack\n 722→\t\t\t}\n 723→\t\t\tcdata = cdata[0:newlen]\n 724→\t\t\tif len(cdata) != len(data) {\n 725→\t\t\t\treturn ErrDataDoesNotAlignDataLenMismatch\n 726→\t\t\t}\n 727→\n 728→\t\t\tfrom, to = cfrom, cto\n 729→\t\t}\n 730→\n 731→\t\tdata = cdata\n 732→\t\tn += 1\n 733→\t\treturn nil\n 734→\t})\n 735→\n 736→\tif err != nil {\n 737→\t\treturn nil, 0, 0, 0, err\n 738→\t} else if n == 0 {\n 739→\t\treturn nil, 0, 0, 0, ErrNoHostOrMetric\n 740→\t} else if n > 1 {\n 741→\t\tif minfo.Aggregation == AvgAggregation {\n 742→\t\t\tnormalize := 1. / schema.Float(n)\n 743→\t\t\tfor i := 0; i < len(data); i++ {\n 744→\t\t\t\tdata[i] *= normalize\n 745→\t\t\t}\n 746→\t\t} else if minfo.Aggregation != SumAggregation {\n 747→\t\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid aggregation\")\n 748→\t\t}\n 749→\t}\n 750→\n 751→\tdata, resolution, err = resampler.LargestTriangleThreeBucket(data, minfo.Frequency, resolution)\n 752→\tif err != nil {\n 753→\t\treturn nil, 0, 0, 0, err\n 754→\t}\n 755→\n 756→\treturn data, from, to, resolution, nil\n 757→}\n 758→\n 759→// Free releases all buffers for the selected level and all its children that\n 760→// contain only values older than `t`.\n 761→func (m *MemoryStore) Free(selector []string, t int64) (int, error) {\n 762→\treturn m.GetLevel(selector).free(t)\n 763→}\n 764→\n 765→// ForceFree unconditionally removes the oldest buffer from each metric chain.\n 766→func (m *MemoryStore) ForceFree() (int, error) {\n 767→\treturn m.GetLevel(nil).forceFree()\n 768→}\n 769→\n 770→func (m *MemoryStore) FreeAll() error {\n 771→\tm.root.lock.Lock()\n 772→\tdefer m.root.lock.Unlock()\n 773→\n 774→\tfor k := range m.root.children {\n 775→\t\tdelete(m.root.children, k)\n 776→\t}\n 777→\n 778→\treturn nil\n 779→}\n 780→\n 781→func (m *MemoryStore) SizeInBytes() int64 {\n 782→\treturn m.root.sizeInBytes()\n 783→}\n 784→\n 785→func (m *MemoryStore) SizeInGB() float64 {\n 786→\treturn float64(m.root.sizeInBytes()) / 1e9\n 787→}\n 788→\n 789→// ListChildren , given a selector, returns a list of all children of the level\n 790→// selected.\n 791→func (m *MemoryStore) ListChildren(selector []string) []string {\n 792→\tlvl := &m.root\n 793→\tfor lvl != nil && len(selector) != 0 {\n 794→\t\tlvl.lock.RLock()\n 795→\t\tnext := lvl.children[selector[0]]\n 796→\t\tlvl.lock.RUnlock()\n 797→\t\tlvl = next\n 798→\t\tselector = selector[1:]\n 799→\t}\n 800→\n 801→\tif lvl == nil {\n 802→\t\treturn nil\n 803→\t}\n 804→\n 805→\tlvl.lock.RLock()\n 806→\tdefer lvl.lock.RUnlock()\n 807→\n 808→\tchildren := make([]string, 0, len(lvl.children))\n 809→\tfor child := range lvl.children {\n 810→\t\tchildren = append(children, child)\n 811→\t}\n 812→\n 813→\treturn children\n 814→}\n 815→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"533ef5d4-caac-4dbf-b8c5-a91199928ed6","timestamp":"2026-04-01T13:17:38.113Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"03dab2e8-3641-4f97-aea5-63cdd4b49efb","timestamp":"2026-04-01T13:17:38.114Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"03dab2e8-3641-4f97-aea5-63cdd4b49efb","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Dh1GSzNqBbHBUouE9iRi3y","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// This file implements checkpoint persistence for the in-memory metric store.\n 7→//\n 8→// Checkpoints enable graceful restarts by periodically saving in-memory metric\n 9→// data to disk in JSON or binary format. The checkpoint system:\n 10→//\n 11→// Key Features:\n 12→// - Periodic background checkpointing via the Checkpointing() worker\n 13→// - Two format families: JSON (human-readable) and WAL+binary (compact, crash-safe)\n 14→// - Parallel checkpoint creation and loading using worker pools\n 15→// - Hierarchical file organization: checkpoint_dir/cluster/host/timestamp.{json|bin}\n 16→// - WAL file: checkpoint_dir/cluster/host/current.wal (append-only, per-entry)\n 17→// - Only saves unarchived data (archived data is already persisted elsewhere)\n 18→// - GC optimization during loading to prevent excessive heap growth\n 19→//\n 20→// Checkpoint Workflow:\n 21→// 1. Init() loads checkpoints within retention window at startup\n 22→// 2. Checkpointing() worker periodically saves new data\n 23→// 3. Shutdown() writes final checkpoint before exit\n 24→//\n 25→// File Organization:\n 26→//\n 27→//\tcheckpoints/\n 28→//\t cluster1/\n 29→//\t host001/\n 30→//\t 1234567890.json (JSON format: full subtree snapshot)\n 31→//\t 1234567890.bin (binary format: full subtree snapshot)\n 32→//\t current.wal (WAL format: append-only per-entry log)\n 33→//\t host002/\n 34→//\t ...\n 35→package metricstore\n 36→\n 37→import (\n 38→\t\"bufio\"\n 39→\t\"context\"\n 40→\t\"encoding/json\"\n 41→\t\"errors\"\n 42→\t\"fmt\"\n 43→\t\"io/fs\"\n 44→\t\"os\"\n 45→\t\"path\"\n 46→\t\"path/filepath\"\n 47→\t\"sort\"\n 48→\t\"strconv\"\n 49→\t\"strings\"\n 50→\t\"sync\"\n 51→\t\"sync/atomic\"\n 52→\t\"time\"\n 53→\n 54→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 55→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 56→)\n 57→\n 58→const (\n 59→\tCheckpointFilePerms = 0o644 // File permissions for checkpoint files\n 60→\tCheckpointDirPerms = 0o755 // Directory permissions for checkpoint directories\n 61→\tGCTriggerInterval = DefaultGCTriggerInterval // Interval for triggering GC during checkpoint loading\n 62→)\n 63→\n 64→// CheckpointMetrics represents metric data in a checkpoint file.\n 65→// Whenever the structure changes, update MarshalJSON as well!\n 66→type CheckpointMetrics struct {\n 67→\tData []schema.Float `json:\"data\"`\n 68→\tFrequency int64 `json:\"frequency\"`\n 69→\tStart int64 `json:\"start\"`\n 70→}\n 71→\n 72→// CheckpointFile represents the hierarchical structure of a checkpoint file.\n 73→// It mirrors the Level tree structure from the MemoryStore.\n 74→type CheckpointFile struct {\n 75→\tMetrics map[string]*CheckpointMetrics `json:\"metrics\"`\n 76→\tChildren map[string]*CheckpointFile `json:\"children\"`\n 77→\tFrom int64 `json:\"from\"`\n 78→\tTo int64 `json:\"to\"`\n 79→}\n 80→\n 81→// lastCheckpoint tracks the timestamp of the last checkpoint creation.\n 82→var (\n 83→\tlastCheckpoint time.Time\n 84→\tlastCheckpointMu sync.Mutex\n 85→)\n 86→\n 87→// Checkpointing starts a background worker that periodically saves metric data to disk.\n 88→//\n 89→// The checkpoint interval is read from Keys.CheckpointInterval (default: 12 hours).\n 90→//\n 91→// Format behaviour:\n 92→// - \"json\": Writes a JSON snapshot file per host every interval\n 93→// - \"wal\": Writes a binary snapshot file per host every interval, then rotates\n 94→// the current.wal files for all successfully checkpointed hosts\n 95→func Checkpointing(wg *sync.WaitGroup, ctx context.Context) {\n 96→\tlastCheckpointMu.Lock()\n 97→\tlastCheckpoint = time.Now()\n 98→\tlastCheckpointMu.Unlock()\n 99→\n 100→\tms := GetMemoryStore()\n 101→\n 102→\twg.Go(func() {\n 103→\t\td := 12 * time.Hour // default checkpoint interval\n 104→\t\tif Keys.CheckpointInterval != \"\" {\n 105→\t\t\tparsed, err := time.ParseDuration(Keys.CheckpointInterval)\n 106→\t\t\tif err != nil {\n 107→\t\t\t\tcclog.Errorf(\"[METRICSTORE]> invalid checkpoint-interval %q: %s, using default 12h\", Keys.CheckpointInterval, err)\n 108→\t\t\t} else {\n 109→\t\t\t\td = parsed\n 110→\t\t\t}\n 111→\t\t}\n 112→\n 113→\t\tticker := time.NewTicker(d)\n 114→\t\tdefer ticker.Stop()\n 115→\n 116→\t\tfor {\n 117→\t\t\tselect {\n 118→\t\t\tcase <-ctx.Done():\n 119→\t\t\t\treturn\n 120→\t\t\tcase <-ticker.C:\n 121→\t\t\t\tlastCheckpointMu.Lock()\n 122→\t\t\t\tfrom := lastCheckpoint\n 123→\t\t\t\tlastCheckpointMu.Unlock()\n 124→\n 125→\t\t\t\tnow := time.Now()\n 126→\t\t\t\tcclog.Infof(\"[METRICSTORE]> start checkpointing (starting at %s)...\", from.Format(time.RFC3339))\n 127→\n 128→\t\t\t\tif Keys.Checkpoints.FileFormat == \"wal\" {\n 129→\t\t\t\t\t// Pause WAL writes: the binary snapshot captures all in-memory\n 130→\t\t\t\t\t// data, so WAL records written during checkpoint are redundant\n 131→\t\t\t\t\t// and would be deleted during rotation anyway.\n 132→\t\t\t\t\twalCheckpointActive.Store(true)\n 133→\t\t\t\t\tn, hostDirs, err := ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n 134→\t\t\t\t\tif err != nil {\n 135→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpointing failed: %s\", err.Error())\n 136→\t\t\t\t\t}\n 137→\t\t\t\t\tif n > 0 {\n 138→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d binary snapshot files created\", n)\n 139→\t\t\t\t\t\tlastCheckpointMu.Lock()\n 140→\t\t\t\t\t\tlastCheckpoint = now\n 141→\t\t\t\t\t\tlastCheckpointMu.Unlock()\n 142→\t\t\t\t\t\t// Rotate WAL files for successfully checkpointed hosts.\n 143→\t\t\t\t\t\tRotateWALFiles(hostDirs)\n 144→\t\t\t\t\t}\n 145→\t\t\t\t\twalCheckpointActive.Store(false)\n 146→\t\t\t\t\twalDropped.Store(0)\n 147→\t\t\t\t} else {\n 148→\t\t\t\t\tn, err := ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), now.Unix())\n 149→\t\t\t\t\tif err != nil {\n 150→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> checkpointing failed: %s\", err.Error())\n 151→\t\t\t\t\t} else {\n 152→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoint files created\", n)\n 153→\t\t\t\t\t\tlastCheckpointMu.Lock()\n 154→\t\t\t\t\t\tlastCheckpoint = now\n 155→\t\t\t\t\t\tlastCheckpointMu.Unlock()\n 156→\t\t\t\t\t}\n 157→\t\t\t\t}\n 158→\t\t\t}\n 159→\t\t}\n 160→\t})\n 161→}\n 162→\n 163→// MarshalJSON provides optimized JSON encoding for CheckpointMetrics.\n 164→//\n 165→// Since schema.Float has custom MarshalJSON, serializing []Float has significant overhead.\n 166→// This method manually constructs JSON to avoid allocations and interface conversions.\n 167→func (cm *CheckpointMetrics) MarshalJSON() ([]byte, error) {\n 168→\tbuf := make([]byte, 0, 128+len(cm.Data)*8)\n 169→\tbuf = append(buf, `{\"frequency\":`...)\n 170→\tbuf = strconv.AppendInt(buf, cm.Frequency, 10)\n 171→\tbuf = append(buf, `,\"start\":`...)\n 172→\tbuf = strconv.AppendInt(buf, cm.Start, 10)\n 173→\tbuf = append(buf, `,\"data\":[`...)\n 174→\tfor i, x := range cm.Data {\n 175→\t\tif i != 0 {\n 176→\t\t\tbuf = append(buf, ',')\n 177→\t\t}\n 178→\t\tif x.IsNaN() {\n 179→\t\t\tbuf = append(buf, `null`...)\n 180→\t\t} else {\n 181→\t\t\tbuf = strconv.AppendFloat(buf, float64(x), 'f', 1, 32)\n 182→\t\t}\n 183→\t}\n 184→\tbuf = append(buf, `]}`...)\n 185→\treturn buf, nil\n 186→}\n 187→\n 188→// ToCheckpoint writes metric data to checkpoint files in parallel (JSON format).\n 189→//\n 190→// Metrics at root and cluster levels are skipped. One file per host is created.\n 191→// Uses worker pool (Keys.NumWorkers) for parallel processing. Only locks one host\n 192→// at a time, allowing concurrent writes/reads to other hosts.\n 193→//\n 194→// Returns the number of checkpoint files created and any errors encountered.\n 195→func (m *MemoryStore) ToCheckpoint(dir string, from, to int64) (int, error) {\n 196→\t// Pre-calculate capacity by counting cluster/host pairs\n 197→\tm.root.lock.RLock()\n 198→\ttotalHosts := 0\n 199→\tfor _, l1 := range m.root.children {\n 200→\t\tl1.lock.RLock()\n 201→\t\ttotalHosts += len(l1.children)\n 202→\t\tl1.lock.RUnlock()\n 203→\t}\n 204→\tm.root.lock.RUnlock()\n 205→\n 206→\tlevels := make([]*Level, 0, totalHosts)\n 207→\tselectors := make([][]string, 0, totalHosts)\n 208→\n 209→\tm.root.lock.RLock()\n 210→\tfor sel1, l1 := range m.root.children {\n 211→\t\tl1.lock.RLock()\n 212→\t\tfor sel2, l2 := range l1.children {\n 213→\t\t\tlevels = append(levels, l2)\n 214→\t\t\tselectors = append(selectors, []string{sel1, sel2})\n 215→\t\t}\n 216→\t\tl1.lock.RUnlock()\n 217→\t}\n 218→\tm.root.lock.RUnlock()\n 219→\n 220→\ttype workItem struct {\n 221→\t\tlevel *Level\n 222→\t\tdir string\n 223→\t\tselector []string\n 224→\t}\n 225→\n 226→\tn, errs := int32(0), int32(0)\n 227→\n 228→\tvar wg sync.WaitGroup\n 229→\twg.Add(Keys.NumWorkers)\n 230→\twork := make(chan workItem, Keys.NumWorkers*2)\n 231→\tfor worker := 0; worker < Keys.NumWorkers; worker++ {\n 232→\t\tgo func() {\n 233→\t\t\tdefer wg.Done()\n 234→\n 235→\t\t\tfor workItem := range work {\n 236→\t\t\t\tif err := workItem.level.toCheckpoint(workItem.dir, from, to, m); err != nil {\n 237→\t\t\t\t\tif err == ErrNoNewArchiveData {\n 238→\t\t\t\t\t\tcontinue\n 239→\t\t\t\t\t}\n 240→\n 241→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while checkpointing %#v: %s\", workItem.selector, err.Error())\n 242→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n 243→\t\t\t\t} else {\n 244→\t\t\t\t\tatomic.AddInt32(&n, 1)\n 245→\t\t\t\t}\n 246→\t\t\t}\n 247→\t\t}()\n 248→\t}\n 249→\n 250→\tfor i := 0; i < len(levels); i++ {\n 251→\t\tdir := path.Join(dir, path.Join(selectors[i]...))\n 252→\t\twork <- workItem{\n 253→\t\t\tlevel: levels[i],\n 254→\t\t\tdir: dir,\n 255→\t\t\tselector: selectors[i],\n 256→\t\t}\n 257→\t}\n 258→\n 259→\tclose(work)\n 260→\twg.Wait()\n 261→\n 262→\tif errs > 0 {\n 263→\t\treturn int(n), fmt.Errorf(\"[METRICSTORE]> %d errors happened while creating checkpoints (%d successes)\", errs, n)\n 264→\t}\n 265→\treturn int(n), nil\n 266→}\n 267→\n 268→// toCheckpointFile recursively converts a Level tree to CheckpointFile structure.\n 269→// Skips metrics that are already archived. Returns nil if no unarchived data exists.\n 270→func (l *Level) toCheckpointFile(from, to int64, m *MemoryStore) (*CheckpointFile, error) {\n 271→\tl.lock.RLock()\n 272→\tdefer l.lock.RUnlock()\n 273→\n 274→\tretval := &CheckpointFile{\n 275→\t\tFrom: from,\n 276→\t\tTo: to,\n 277→\t\tMetrics: make(map[string]*CheckpointMetrics),\n 278→\t\tChildren: make(map[string]*CheckpointFile),\n 279→\t}\n 280→\n 281→\tfor metric, minfo := range m.Metrics {\n 282→\t\tb := l.metrics[minfo.offset]\n 283→\t\tif b == nil {\n 284→\t\t\tcontinue\n 285→\t\t}\n 286→\n 287→\t\tallArchived := true\n 288→\t\tb.iterFromTo(from, to, func(b *buffer) error {\n 289→\t\t\tif !b.archived {\n 290→\t\t\t\tallArchived = false\n 291→\t\t\t\treturn fmt.Errorf(\"stop\") // Early termination signal\n 292→\t\t\t}\n 293→\t\t\treturn nil\n 294→\t\t})\n 295→\n 296→\t\tif allArchived {\n 297→\t\t\tcontinue\n 298→\t\t}\n 299→\n 300→\t\tdata := make([]schema.Float, (to-from)/b.frequency+1)\n 301→\t\tdata, start, end, err := b.read(from, to, data)\n 302→\t\tif err != nil {\n 303→\t\t\treturn nil, err\n 304→\t\t}\n 305→\n 306→\t\tfor i := int((end - start) / b.frequency); i < len(data); i++ {\n 307→\t\t\tdata[i] = schema.NaN\n 308→\t\t}\n 309→\n 310→\t\tretval.Metrics[metric] = &CheckpointMetrics{\n 311→\t\t\tFrequency: b.frequency,\n 312→\t\t\tStart: start,\n 313→\t\t\tData: data,\n 314→\t\t}\n 315→\t}\n 316→\n 317→\tfor name, child := range l.children {\n 318→\t\tval, err := child.toCheckpointFile(from, to, m)\n 319→\t\tif err != nil {\n 320→\t\t\treturn nil, err\n 321→\t\t}\n 322→\n 323→\t\tif val != nil {\n 324→\t\t\tretval.Children[name] = val\n 325→\t\t}\n 326→\t}\n 327→\n 328→\tif len(retval.Children) == 0 && len(retval.Metrics) == 0 {\n 329→\t\treturn nil, nil\n 330→\t}\n 331→\n 332→\treturn retval, nil\n 333→}\n 334→\n 335→// toCheckpoint writes a Level's data to a JSON checkpoint file.\n 336→// Creates directory if needed. Returns ErrNoNewArchiveData if nothing to save.\n 337→func (l *Level) toCheckpoint(dir string, from, to int64, m *MemoryStore) error {\n 338→\tcf, err := l.toCheckpointFile(from, to, m)\n 339→\tif err != nil {\n 340→\t\treturn err\n 341→\t}\n 342→\n 343→\tif cf == nil {\n 344→\t\treturn ErrNoNewArchiveData\n 345→\t}\n 346→\n 347→\tfilepath := path.Join(dir, fmt.Sprintf(\"%d.json\", from))\n 348→\tf, err := os.OpenFile(filepath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n 349→\tif err != nil && os.IsNotExist(err) {\n 350→\t\terr = os.MkdirAll(dir, CheckpointDirPerms)\n 351→\t\tif err == nil {\n 352→\t\t\tf, err = os.OpenFile(filepath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n 353→\t\t}\n 354→\t}\n 355→\tif err != nil {\n 356→\t\treturn err\n 357→\t}\n 358→\tdefer f.Close()\n 359→\n 360→\tbw := bufio.NewWriter(f)\n 361→\tif err = json.NewEncoder(bw).Encode(cf); err != nil {\n 362→\t\treturn err\n 363→\t}\n 364→\n 365→\treturn bw.Flush()\n 366→}\n 367→\n 368→// enqueueCheckpointHosts traverses checkpoint directory and enqueues cluster/host pairs.\n 369→// Returns error if directory structure is invalid.\n 370→func enqueueCheckpointHosts(dir string, work chan<- [2]string) error {\n 371→\tclustersDir, err := os.ReadDir(dir)\n 372→\tif err != nil {\n 373→\t\treturn err\n 374→\t}\n 375→\n 376→\tfor _, clusterDir := range clustersDir {\n 377→\t\tif !clusterDir.IsDir() {\n 378→\t\t\treturn errors.New(\"[METRICSTORE]> expected only directories at first level of checkpoints/ directory\")\n 379→\t\t}\n 380→\n 381→\t\thostsDir, err := os.ReadDir(filepath.Join(dir, clusterDir.Name()))\n 382→\t\tif err != nil {\n 383→\t\t\treturn err\n 384→\t\t}\n 385→\n 386→\t\tfor _, hostDir := range hostsDir {\n 387→\t\t\tif !hostDir.IsDir() {\n 388→\t\t\t\treturn errors.New(\"[METRICSTORE]> expected only directories at second level of checkpoints/ directory\")\n 389→\t\t\t}\n 390→\n 391→\t\t\twork <- [2]string{clusterDir.Name(), hostDir.Name()}\n 392→\t\t}\n 393→\t}\n 394→\n 395→\treturn nil\n 396→}\n 397→\n 398→// FromCheckpoint loads checkpoint files from disk into memory in parallel.\n 399→//\n 400→// Uses worker pool to load cluster/host combinations. Returns number of files\n 401→// loaded and any errors.\n 402→func (m *MemoryStore) FromCheckpoint(dir string, from int64) (int, error) {\n 403→\tvar wg sync.WaitGroup\n 404→\twork := make(chan [2]string, Keys.NumWorkers*4)\n 405→\tn, errs := int32(0), int32(0)\n 406→\n 407→\twg.Add(Keys.NumWorkers)\n 408→\tfor worker := 0; worker < Keys.NumWorkers; worker++ {\n 409→\t\tgo func() {\n 410→\t\t\tdefer wg.Done()\n 411→\t\t\tfor host := range work {\n 412→\t\t\t\tlvl := m.root.findLevelOrCreate(host[:], len(m.Metrics))\n 413→\t\t\t\tnn, err := lvl.fromCheckpoint(m, filepath.Join(dir, host[0], host[1]), from)\n 414→\t\t\t\tif err != nil {\n 415→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while loading checkpoints for %s/%s: %s\", host[0], host[1], err.Error())\n 416→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n 417→\t\t\t\t}\n 418→\t\t\t\tatomic.AddInt32(&n, int32(nn))\n 419→\t\t\t}\n 420→\t\t}()\n 421→\t}\n 422→\n 423→\terr := enqueueCheckpointHosts(dir, work)\n 424→\tclose(work)\n 425→\twg.Wait()\n 426→\n 427→\tif err != nil {\n 428→\t\treturn int(n), err\n 429→\t}\n 430→\n 431→\tif errs > 0 {\n 432→\t\treturn int(n), fmt.Errorf(\"[METRICSTORE]> %d errors happened while creating checkpoints (%d successes)\", errs, n)\n 433→\t}\n 434→\treturn int(n), nil\n 435→}\n 436→\n 437→// FromCheckpointFiles is the main entry point for loading checkpoints at startup.\n 438→//\n 439→// Creates checkpoint directory if it doesn't exist. This function must be called\n 440→// before any writes or reads, and can only be called once.\n 441→func (m *MemoryStore) FromCheckpointFiles(dir string, from int64) (int, error) {\n 442→\tif _, err := os.Stat(dir); os.IsNotExist(err) {\n 443→\t\terr := os.MkdirAll(dir, CheckpointDirPerms)\n 444→\t\tif err != nil {\n 445→\t\t\tcclog.Fatalf(\"[METRICSTORE]> Error creating directory: %#v\\n\", err)\n 446→\t\t}\n 447→\t\tcclog.Debugf(\"[METRICSTORE]> %#v Directory created successfully\", dir)\n 448→\t}\n 449→\n 450→\treturn m.FromCheckpoint(dir, from)\n 451→}\n 452→\n 453→func (l *Level) loadJSONFile(m *MemoryStore, f *os.File, from int64) error {\n 454→\tbr := bufio.NewReader(f)\n 455→\tcf := &CheckpointFile{}\n 456→\tif err := json.NewDecoder(br).Decode(cf); err != nil {\n 457→\t\treturn err\n 458→\t}\n 459→\n 460→\tif cf.To != 0 && cf.To < from {\n 461→\t\treturn nil\n 462→\t}\n 463→\n 464→\tif err := l.loadFile(cf, m); err != nil {\n 465→\t\treturn err\n 466→\t}\n 467→\n 468→\treturn nil\n 469→}\n 470→\n 471→func (l *Level) loadFile(cf *CheckpointFile, m *MemoryStore) error {\n 472→\tfor name, metric := range cf.Metrics {\n 473→\t\tn := len(metric.Data)\n 474→\t\tb := &buffer{\n 475→\t\t\tfrequency: metric.Frequency,\n 476→\t\t\tstart: metric.Start,\n 477→\t\t\tdata: metric.Data[0:n:n],\n 478→\t\t\tprev: nil,\n 479→\t\t\tnext: nil,\n 480→\t\t\tarchived: true,\n 481→\t\t}\n 482→\n 483→\t\tminfo, ok := m.Metrics[name]\n 484→\t\tif !ok {\n 485→\t\t\tcontinue\n 486→\t\t}\n 487→\n 488→\t\tprev := l.metrics[minfo.offset]\n 489→\t\tif prev == nil {\n 490→\t\t\tl.metrics[minfo.offset] = b\n 491→\t\t} else {\n 492→\t\t\tif prev.start > b.start {\n 493→\t\t\t\treturn fmt.Errorf(\"[METRICSTORE]> buffer start time %d is before previous buffer start %d\", b.start, prev.start)\n 494→\t\t\t}\n 495→\n 496→\t\t\tb.prev = prev\n 497→\t\t\tprev.next = b\n 498→\t\t}\n 499→\t\tl.metrics[minfo.offset] = b\n 500→\t}\n 501→\n 502→\tif len(cf.Children) > 0 && l.children == nil {\n 503→\t\tl.children = make(map[string]*Level)\n 504→\t}\n 505→\n 506→\tfor sel, childCf := range cf.Children {\n 507→\t\tchild, ok := l.children[sel]\n 508→\t\tif !ok {\n 509→\t\t\tchild = &Level{\n 510→\t\t\t\tmetrics: make([]*buffer, len(m.Metrics)),\n 511→\t\t\t\tchildren: nil,\n 512→\t\t\t}\n 513→\t\t\tl.children[sel] = child\n 514→\t\t}\n 515→\n 516→\t\tif err := child.loadFile(childCf, m); err != nil {\n 517→\t\t\treturn err\n 518→\t\t}\n 519→\t}\n 520→\n 521→\treturn nil\n 522→}\n 523→\n 524→// fromCheckpoint loads all checkpoint files (JSON, binary snapshot, WAL) for a\n 525→// single host directory. Snapshot files are loaded first (sorted by timestamp),\n 526→// then current.wal is replayed on top.\n 527→func (l *Level) fromCheckpoint(m *MemoryStore, dir string, from int64) (int, error) {\n 528→\tdirentries, err := os.ReadDir(dir)\n 529→\tif err != nil {\n 530→\t\tif os.IsNotExist(err) {\n 531→\t\t\treturn 0, nil\n 532→\t\t}\n 533→\t\treturn 0, err\n 534→\t}\n 535→\n 536→\tallFiles := make([]fs.DirEntry, 0)\n 537→\tvar walEntry fs.DirEntry\n 538→\tfilesLoaded := 0\n 539→\n 540→\tfor _, e := range direntries {\n 541→\t\tif e.IsDir() {\n 542→\t\t\t// Legacy: skip subdirectories (only used by old Avro format).\n 543→\t\t\t// These are ignored; their data is not loaded.\n 544→\t\t\tcclog.Debugf(\"[METRICSTORE]> skipping subdirectory %s in checkpoint dir %s\", e.Name(), dir)\n 545→\t\t\tcontinue\n 546→\t\t}\n 547→\n 548→\t\tname := e.Name()\n 549→\t\tif strings.HasSuffix(name, \".json\") || strings.HasSuffix(name, \".bin\") {\n 550→\t\t\tallFiles = append(allFiles, e)\n 551→\t\t} else if name == \"current.wal\" {\n 552→\t\t\twalEntry = e\n 553→\t\t}\n 554→\t\t// Silently ignore other files (e.g., .tmp, .bin.tmp from interrupted writes).\n 555→\t}\n 556→\n 557→\tfiles, err := findFiles(allFiles, from, true)\n 558→\tif err != nil {\n 559→\t\treturn filesLoaded, err\n 560→\t}\n 561→\n 562→\tloaders := map[string]func(*MemoryStore, *os.File, int64) error{\n 563→\t\t\".json\": l.loadJSONFile,\n 564→\t\t\".bin\": l.loadBinaryFile,\n 565→\t}\n 566→\n 567→\tfor _, filename := range files {\n 568→\t\text := filepath.Ext(filename)\n 569→\t\tloader := loaders[ext]\n 570→\t\tif loader == nil {\n 571→\t\t\tcclog.Warnf(\"[METRICSTORE]> unknown extension for checkpoint file %s\", filename)\n 572→\t\t\tcontinue\n 573→\t\t}\n 574→\n 575→\t\terr := func() error {\n 576→\t\t\tf, err := os.Open(path.Join(dir, filename))\n 577→\t\t\tif err != nil {\n 578→\t\t\t\treturn err\n 579→\t\t\t}\n 580→\t\t\tdefer f.Close()\n 581→\t\t\treturn loader(m, f, from)\n 582→\t\t}()\n 583→\t\tif err != nil {\n 584→\t\t\treturn filesLoaded, err\n 585→\t\t}\n 586→\t\tfilesLoaded++\n 587→\t}\n 588→\n 589→\t// Replay WAL after all snapshot files so it fills in data since the last snapshot.\n 590→\tif walEntry != nil {\n 591→\t\terr := func() error {\n 592→\t\t\tf, err := os.Open(path.Join(dir, walEntry.Name()))\n 593→\t\t\tif err != nil {\n 594→\t\t\t\treturn err\n 595→\t\t\t}\n 596→\t\t\tdefer f.Close()\n 597→\t\t\treturn l.loadWALFile(m, f, from)\n 598→\t\t}()\n 599→\t\tif err != nil {\n 600→\t\t\t// WAL errors are non-fatal: the snapshot already loaded the bulk of data.\n 601→\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL replay error for %s: %v (data since last snapshot may be missing)\", dir, err)\n 602→\t\t} else {\n 603→\t\t\tfilesLoaded++\n 604→\t\t}\n 605→\t}\n 606→\n 607→\treturn filesLoaded, nil\n 608→}\n 609→\n 610→// parseTimestampFromFilename extracts a Unix timestamp from a checkpoint filename.\n 611→// Supports \".json\" (format: \"<ts>.json\") and \".bin\" (format: \"<ts>.bin\").\n 612→func parseTimestampFromFilename(name string) (int64, error) {\n 613→\tswitch {\n 614→\tcase strings.HasSuffix(name, \".json\"):\n 615→\t\treturn strconv.ParseInt(name[:len(name)-5], 10, 64)\n 616→\tcase strings.HasSuffix(name, \".bin\"):\n 617→\t\treturn strconv.ParseInt(name[:len(name)-4], 10, 64)\n 618→\tdefault:\n 619→\t\treturn 0, fmt.Errorf(\"unknown checkpoint extension for file %q\", name)\n 620→\t}\n 621→}\n 622→\n 623→// findFiles returns filenames from direntries whose timestamps satisfy the filter.\n 624→// If findMoreRecentFiles is true, returns files with timestamps >= t (plus the\n 625→// last file before t if t falls between two files).\n 626→func findFiles(direntries []fs.DirEntry, t int64, findMoreRecentFiles bool) ([]string, error) {\n 627→\tnums := map[string]int64{}\n 628→\tfor _, e := range direntries {\n 629→\t\tname := e.Name()\n 630→\t\tif !strings.HasSuffix(name, \".json\") && !strings.HasSuffix(name, \".bin\") {\n 631→\t\t\tcontinue\n 632→\t\t}\n 633→\n 634→\t\tts, err := parseTimestampFromFilename(name)\n 635→\t\tif err != nil {\n 636→\t\t\treturn nil, err\n 637→\t\t}\n 638→\t\tnums[name] = ts\n 639→\t}\n 640→\n 641→\tsort.Slice(direntries, func(i, j int) bool {\n 642→\t\ta, b := direntries[i], direntries[j]\n 643→\t\treturn nums[a.Name()] < nums[b.Name()]\n 644→\t})\n 645→\n 646→\tif len(nums) == 0 {\n 647→\t\treturn nil, nil\n 648→\t}\n 649→\n 650→\tfilenames := make([]string, 0)\n 651→\n 652→\tfor i, e := range direntries {\n 653→\t\tts1 := nums[e.Name()]\n 654→\n 655→\t\tif findMoreRecentFiles && t <= ts1 {\n 656→\t\t\tfilenames = append(filenames, e.Name())\n 657→\t\t} else if !findMoreRecentFiles && ts1 <= t && ts1 != 0 {\n 658→\t\t\tfilenames = append(filenames, e.Name())\n 659→\t\t}\n 660→\n 661→\t\tif i == len(direntries)-1 {\n 662→\t\t\tcontinue\n 663→\t\t}\n 664→\n 665→\t\tenext := direntries[i+1]\n 666→\t\tts2 := nums[enext.Name()]\n 667→\n 668→\t\tif findMoreRecentFiles {\n 669→\t\t\tif ts1 < t && t < ts2 {\n 670→\t\t\t\tfilenames = append(filenames, e.Name())\n 671→\t\t\t}\n 672→\t\t}\n 673→\t}\n 674→\n 675→\treturn filenames, nil\n 676→}\n 677→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"03ae6091-bb48-4d25-953f-fe0eaa798ebb","timestamp":"2026-04-01T13:17:38.181Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"a4b49eaa-5d09-4452-918e-70bca63595d5","timestamp":"2026-04-01T13:17:38.182Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"a4b49eaa-5d09-4452-918e-70bca63595d5","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:17:41.482Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_014W6iaNP43Y5nvc6DHrX86L","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_014k1U9SQxcMsYynTUp54K5o","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":25450,"cache_read_input_tokens":16312,"cache_creation":{"ephemeral_5m_input_tokens":25450,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7gQ1aRp92YkXMUpXNc","uuid":"acc7655b-bc56-4eb3-a2fb-a53153f36eb4"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"e1b0497a-f1d0-4188-a98c-cd6568a4a5ba","timestamp":"2026-04-01T13:17:41.483Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"e1b0497a-f1d0-4188-a98c-cd6568a4a5ba","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"File content (10360 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.","is_error":true,"tool_use_id":"toolu_014k1U9SQxcMsYynTUp54K5o"}]},"uuid":"076804ed-d544-43bf-b33b-0ee32328aa1b","timestamp":"2026-04-01T13:17:41.756Z","toolUseResult":"Error: File content (10360 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file."},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"1a4b4568-4f79-4ab0-8659-53ec1c79cca8","timestamp":"2026-04-01T13:17:41.758Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"1a4b4568-4f79-4ab0-8659-53ec1c79cca8","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:17:41.796Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_014W6iaNP43Y5nvc6DHrX86L","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01H5zNPjGbfNem1YnGxDEqTF","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/archive.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":25450,"cache_read_input_tokens":16312,"cache_creation":{"ephemeral_5m_input_tokens":25450,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7gQ1aRp92YkXMUpXNc","uuid":"cfd9a3db-19d1-4657-bb84-faca73280a6f"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"448e9405-bf33-4be1-a1c7-3878036e73aa","timestamp":"2026-04-01T13:17:41.797Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"448e9405-bf33-4be1-a1c7-3878036e73aa","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:17:41.916Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_014W6iaNP43Y5nvc6DHrX86L","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_015mzV4vTf1ybAoEmXSZsxTT","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/level.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":25450,"cache_read_input_tokens":16312,"cache_creation":{"ephemeral_5m_input_tokens":25450,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7gQ1aRp92YkXMUpXNc","uuid":"f5627def-54ea-42bf-958d-da8f90acda3f"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"aa883d2f-8501-4bbe-938e-7f98eed37b68","timestamp":"2026-04-01T13:17:41.916Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"aa883d2f-8501-4bbe-938e-7f98eed37b68","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01H5zNPjGbfNem1YnGxDEqTF","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// This file implements the cleanup (archiving or deletion) of old checkpoint files.\n 7→//\n 8→// The CleanUp worker runs on a timer equal to RetentionInMemory. In \"archive\" mode\n 9→// it converts checkpoint files older than the retention window into per-cluster\n 10→// Parquet files and then deletes the originals. In \"delete\" mode it simply removes\n 11→// old checkpoint files.\n 12→package metricstore\n 13→\n 14→import (\n 15→\t\"context\"\n 16→\t\"errors\"\n 17→\t\"fmt\"\n 18→\t\"os\"\n 19→\t\"path/filepath\"\n 20→\t\"strings\"\n 21→\t\"sync\"\n 22→\t\"sync/atomic\"\n 23→\t\"time\"\n 24→\n 25→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 26→)\n 27→\n 28→// CleanUp starts a background worker that periodically removes or archives\n 29→// checkpoint files older than the configured retention window.\n 30→//\n 31→// In \"archive\" mode, old checkpoint files are converted to Parquet and stored\n 32→// under Keys.Cleanup.RootDir. In \"delete\" mode they are simply removed.\n 33→// The cleanup interval equals Keys.RetentionInMemory.\n 34→func CleanUp(wg *sync.WaitGroup, ctx context.Context) {\n 35→\tif Keys.Cleanup.Mode == \"archive\" {\n 36→\t\tcclog.Info(\"[METRICSTORE]> enable archive cleanup to parquet\")\n 37→\t\t// Run as Archiver\n 38→\t\tcleanUpWorker(wg, ctx,\n 39→\t\t\tKeys.RetentionInMemory,\n 40→\t\t\t\"archiving\",\n 41→\t\t\tKeys.Cleanup.RootDir,\n 42→\t\t\tfalse,\n 43→\t\t)\n 44→\t} else {\n 45→\t\t// Run as Deleter\n 46→\t\tcleanUpWorker(wg, ctx,\n 47→\t\t\tKeys.RetentionInMemory,\n 48→\t\t\t\"deleting\",\n 49→\t\t\t\"\",\n 50→\t\t\ttrue,\n 51→\t\t)\n 52→\t}\n 53→}\n 54→\n 55→// cleanUpWorker takes simple values to configure what it does\n 56→func cleanUpWorker(wg *sync.WaitGroup, ctx context.Context, interval string, mode string, cleanupDir string, delete bool) {\n 57→\twg.Go(func() {\n 58→\t\td, err := time.ParseDuration(interval)\n 59→\t\tif err != nil {\n 60→\t\t\tcclog.Fatalf(\"[METRICSTORE]> error parsing %s interval duration: %v\\n\", mode, err)\n 61→\t\t}\n 62→\t\tif d <= 0 {\n 63→\t\t\treturn\n 64→\t\t}\n 65→\n 66→\t\tticker := time.NewTicker(d)\n 67→\t\tdefer ticker.Stop()\n 68→\n 69→\t\tfor {\n 70→\t\t\tselect {\n 71→\t\t\tcase <-ctx.Done():\n 72→\t\t\t\treturn\n 73→\t\t\tcase <-ticker.C:\n 74→\t\t\t\tt := time.Now().Add(-d)\n 75→\t\t\t\tcclog.Infof(\"[METRICSTORE]> start %s checkpoints (older than %s)...\", mode, t.Format(time.RFC3339))\n 76→\n 77→\t\t\t\tn, err := CleanupCheckpoints(Keys.Checkpoints.RootDir, cleanupDir, t.Unix(), delete)\n 78→\n 79→\t\t\t\tif err != nil {\n 80→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> %s failed: %s\", mode, err.Error())\n 81→\t\t\t\t} else {\n 82→\t\t\t\t\tif delete {\n 83→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoints deleted\", n)\n 84→\t\t\t\t\t} else {\n 85→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoint files archived to parquet\", n)\n 86→\t\t\t\t\t}\n 87→\t\t\t\t}\n 88→\t\t\t}\n 89→\t\t}\n 90→\t})\n 91→}\n 92→\n 93→var ErrNoNewArchiveData error = errors.New(\"all data already archived\")\n 94→\n 95→// CleanupCheckpoints deletes or archives all checkpoint files older than `from`.\n 96→// When archiving, consolidates all hosts per cluster into a single Parquet file.\n 97→func CleanupCheckpoints(checkpointsDir, cleanupDir string, from int64, deleteInstead bool) (int, error) {\n 98→\tif deleteInstead {\n 99→\t\treturn deleteCheckpoints(checkpointsDir, from)\n 100→\t}\n 101→\n 102→\treturn archiveCheckpoints(checkpointsDir, cleanupDir, from)\n 103→}\n 104→\n 105→// deleteCheckpoints removes checkpoint files older than `from` across all clusters/hosts.\n 106→func deleteCheckpoints(checkpointsDir string, from int64) (int, error) {\n 107→\tentries1, err := os.ReadDir(checkpointsDir)\n 108→\tif err != nil {\n 109→\t\treturn 0, err\n 110→\t}\n 111→\n 112→\ttype workItem struct {\n 113→\t\tdir string\n 114→\t\tcluster, host string\n 115→\t}\n 116→\n 117→\tvar wg sync.WaitGroup\n 118→\tn, errs := int32(0), int32(0)\n 119→\twork := make(chan workItem, Keys.NumWorkers)\n 120→\n 121→\twg.Add(Keys.NumWorkers)\n 122→\tfor worker := 0; worker < Keys.NumWorkers; worker++ {\n 123→\t\tgo func() {\n 124→\t\t\tdefer wg.Done()\n 125→\t\t\tfor item := range work {\n 126→\t\t\t\tentries, err := os.ReadDir(item.dir)\n 127→\t\t\t\tif err != nil {\n 128→\t\t\t\t\tcclog.Errorf(\"error reading %s/%s: %s\", item.cluster, item.host, err.Error())\n 129→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n 130→\t\t\t\t\tcontinue\n 131→\t\t\t\t}\n 132→\n 133→\t\t\t\tfiles, err := findFiles(entries, from, false)\n 134→\t\t\t\tif err != nil {\n 135→\t\t\t\t\tcclog.Errorf(\"error finding files in %s/%s: %s\", item.cluster, item.host, err.Error())\n 136→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n 137→\t\t\t\t\tcontinue\n 138→\t\t\t\t}\n 139→\n 140→\t\t\t\tfor _, checkpoint := range files {\n 141→\t\t\t\t\tif err := os.Remove(filepath.Join(item.dir, checkpoint)); err != nil {\n 142→\t\t\t\t\t\tcclog.Errorf(\"error deleting %s/%s/%s: %s\", item.cluster, item.host, checkpoint, err.Error())\n 143→\t\t\t\t\t\tatomic.AddInt32(&errs, 1)\n 144→\t\t\t\t\t} else {\n 145→\t\t\t\t\t\tatomic.AddInt32(&n, 1)\n 146→\t\t\t\t\t}\n 147→\t\t\t\t}\n 148→\t\t\t}\n 149→\t\t}()\n 150→\t}\n 151→\n 152→\tfor _, de1 := range entries1 {\n 153→\t\tentries2, e := os.ReadDir(filepath.Join(checkpointsDir, de1.Name()))\n 154→\t\tif e != nil {\n 155→\t\t\terr = e\n 156→\t\t\tcontinue\n 157→\t\t}\n 158→\n 159→\t\tfor _, de2 := range entries2 {\n 160→\t\t\twork <- workItem{\n 161→\t\t\t\tdir: filepath.Join(checkpointsDir, de1.Name(), de2.Name()),\n 162→\t\t\t\tcluster: de1.Name(),\n 163→\t\t\t\thost: de2.Name(),\n 164→\t\t\t}\n 165→\t\t}\n 166→\t}\n 167→\n 168→\tclose(work)\n 169→\twg.Wait()\n 170→\n 171→\tif err != nil {\n 172→\t\treturn int(n), err\n 173→\t}\n 174→\tif errs > 0 {\n 175→\t\treturn int(n), fmt.Errorf(\"%d errors happened while deleting (%d successes)\", errs, n)\n 176→\t}\n 177→\treturn int(n), nil\n 178→}\n 179→\n 180→// archiveCheckpoints archives checkpoint files to Parquet format.\n 181→// Produces one Parquet file per cluster: <cleanupDir>/<cluster>/<timestamp>.parquet\n 182→// Workers load checkpoint files from disk and send CheckpointFile trees on a\n 183→// back-pressured channel. The main thread streams each tree directly to Parquet\n 184→// rows without materializing all rows in memory.\n 185→func archiveCheckpoints(checkpointsDir, cleanupDir string, from int64) (int, error) {\n 186→\tcclog.Info(\"[METRICSTORE]> start archiving checkpoints to parquet\")\n 187→\tstartTime := time.Now()\n 188→\n 189→\tclusterEntries, err := os.ReadDir(checkpointsDir)\n 190→\tif err != nil {\n 191→\t\treturn 0, err\n 192→\t}\n 193→\n 194→\ttotalFiles := 0\n 195→\tvar clusterErrors []string\n 196→\n 197→\tfor _, clusterEntry := range clusterEntries {\n 198→\t\tif !clusterEntry.IsDir() {\n 199→\t\t\tcontinue\n 200→\t\t}\n 201→\n 202→\t\tcluster := clusterEntry.Name()\n 203→\t\thostEntries, err := os.ReadDir(filepath.Join(checkpointsDir, cluster))\n 204→\t\tif err != nil {\n 205→\t\t\tcclog.Errorf(\"[METRICSTORE]> error reading host entries for cluster %s: %s\", cluster, err.Error())\n 206→\t\t\tclusterErrors = append(clusterErrors, cluster)\n 207→\t\t\tcontinue\n 208→\t\t}\n 209→\n 210→\t\t// Workers load checkpoint files from disk; main thread writes to parquet.\n 211→\t\ttype hostResult struct {\n 212→\t\t\tcheckpoints []*CheckpointFile\n 213→\t\t\thostname string\n 214→\t\t\tfiles []string // checkpoint filenames to delete after successful write\n 215→\t\t\tdir string // checkpoint directory for this host\n 216→\t\t}\n 217→\n 218→\t\t// Small buffer provides back-pressure: at most NumWorkers+2 results in flight.\n 219→\t\tresults := make(chan hostResult, 2)\n 220→\t\twork := make(chan struct {\n 221→\t\t\tdir, host string\n 222→\t\t}, Keys.NumWorkers)\n 223→\n 224→\t\tvar wg sync.WaitGroup\n 225→\t\terrs := int32(0)\n 226→\n 227→\t\twg.Add(Keys.NumWorkers)\n 228→\t\tfor w := 0; w < Keys.NumWorkers; w++ {\n 229→\t\t\tgo func() {\n 230→\t\t\t\tdefer wg.Done()\n 231→\t\t\t\tfor item := range work {\n 232→\t\t\t\t\tcheckpoints, files, err := loadCheckpointFiles(item.dir, from)\n 233→\t\t\t\t\tif err != nil {\n 234→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error reading checkpoints for %s/%s: %s\", cluster, item.host, err.Error())\n 235→\t\t\t\t\t\tatomic.AddInt32(&errs, 1)\n 236→\t\t\t\t\t\tcontinue\n 237→\t\t\t\t\t}\n 238→\t\t\t\t\tif len(checkpoints) > 0 {\n 239→\t\t\t\t\t\tresults <- hostResult{\n 240→\t\t\t\t\t\t\tcheckpoints: checkpoints,\n 241→\t\t\t\t\t\t\thostname: item.host,\n 242→\t\t\t\t\t\t\tfiles: files,\n 243→\t\t\t\t\t\t\tdir: item.dir,\n 244→\t\t\t\t\t\t}\n 245→\t\t\t\t\t}\n 246→\t\t\t\t}\n 247→\t\t\t}()\n 248→\t\t}\n 249→\n 250→\t\tgo func() {\n 251→\t\t\tfor _, hostEntry := range hostEntries {\n 252→\t\t\t\tif !hostEntry.IsDir() {\n 253→\t\t\t\t\tcontinue\n 254→\t\t\t\t}\n 255→\t\t\t\tdir := filepath.Join(checkpointsDir, cluster, hostEntry.Name())\n 256→\t\t\t\twork <- struct {\n 257→\t\t\t\t\tdir, host string\n 258→\t\t\t\t}{dir: dir, host: hostEntry.Name()}\n 259→\t\t\t}\n 260→\t\t\tclose(work)\n 261→\t\t\twg.Wait()\n 262→\t\t\tclose(results)\n 263→\t\t}()\n 264→\n 265→\t\t// Open streaming writer and write each host's checkpoint files as a row group\n 266→\t\tparquetFile := filepath.Join(cleanupDir, cluster, fmt.Sprintf(\"%d.parquet\", from))\n 267→\t\twriter, err := newParquetArchiveWriter(parquetFile)\n 268→\t\tif err != nil {\n 269→\t\t\t// Drain results channel to unblock workers\n 270→\t\t\tfor range results {\n 271→\t\t\t}\n 272→\t\t\tcclog.Errorf(\"[METRICSTORE]> error creating parquet writer for cluster %s: %s\", cluster, err.Error())\n 273→\t\t\tclusterErrors = append(clusterErrors, cluster)\n 274→\t\t\tcontinue\n 275→\t\t}\n 276→\n 277→\t\ttype deleteItem struct {\n 278→\t\t\tdir string\n 279→\t\t\tfiles []string\n 280→\t\t}\n 281→\t\tvar toDelete []deleteItem\n 282→\t\twriteErr := error(nil)\n 283→\n 284→\t\tfor r := range results {\n 285→\t\t\tif writeErr == nil {\n 286→\t\t\t\t// Stream each checkpoint file directly to parquet rows.\n 287→\t\t\t\t// Each checkpoint is processed and discarded before the next.\n 288→\t\t\t\tfor _, cf := range r.checkpoints {\n 289→\t\t\t\t\tif err := writer.WriteCheckpointFile(cf, cluster, r.hostname, \"node\", \"\"); err != nil {\n 290→\t\t\t\t\t\twriteErr = err\n 291→\t\t\t\t\t\tbreak\n 292→\t\t\t\t\t}\n 293→\t\t\t\t}\n 294→\t\t\t\t// Flush once per host to keep row group count within parquet limits.\n 295→\t\t\t\tif writeErr == nil {\n 296→\t\t\t\t\tif err := writer.FlushRowGroup(); err != nil {\n 297→\t\t\t\t\t\twriteErr = err\n 298→\t\t\t\t\t}\n 299→\t\t\t\t}\n 300→\t\t\t}\n 301→\t\t\t// Always track files for deletion (even if write failed, we still drain)\n 302→\t\t\ttoDelete = append(toDelete, deleteItem{dir: r.dir, files: r.files})\n 303→\t\t}\n 304→\n 305→\t\tif err := writer.Close(); err != nil && writeErr == nil {\n 306→\t\t\twriteErr = err\n 307→\t\t}\n 308→\n 309→\t\tif errs > 0 {\n 310→\t\t\tcclog.Errorf(\"[METRICSTORE]> %d errors reading checkpoints for cluster %s\", errs, cluster)\n 311→\t\t\tclusterErrors = append(clusterErrors, cluster)\n 312→\t\t\tos.Remove(parquetFile)\n 313→\t\t\tcontinue\n 314→\t\t}\n 315→\n 316→\t\tif writer.count == 0 {\n 317→\t\t\t// No data written — remove empty file\n 318→\t\t\tos.Remove(parquetFile)\n 319→\t\t\tcontinue\n 320→\t\t}\n 321→\n 322→\t\tif writeErr != nil {\n 323→\t\t\tos.Remove(parquetFile)\n 324→\t\t\tcclog.Errorf(\"[METRICSTORE]> error writing parquet archive for cluster %s: %s\", cluster, writeErr.Error())\n 325→\t\t\tclusterErrors = append(clusterErrors, cluster)\n 326→\t\t\tcontinue\n 327→\t\t}\n 328→\n 329→\t\t// Delete archived checkpoint files\n 330→\t\tfor _, item := range toDelete {\n 331→\t\t\tfor _, file := range item.files {\n 332→\t\t\t\tfilename := filepath.Join(item.dir, file)\n 333→\t\t\t\tif err := os.Remove(filename); err != nil {\n 334→\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> could not remove archived checkpoint %s: %v\", filename, err)\n 335→\t\t\t\t} else {\n 336→\t\t\t\t\ttotalFiles++\n 337→\t\t\t\t}\n 338→\t\t\t}\n 339→\t\t}\n 340→\n 341→\t\tcclog.Infof(\"[METRICSTORE]> archived %d rows from %d files for cluster %s to %s\",\n 342→\t\t\twriter.count, totalFiles, cluster, parquetFile)\n 343→\t}\n 344→\n 345→\tcclog.Infof(\"[METRICSTORE]> archiving checkpoints completed in %s (%d files)\", time.Since(startTime).Round(time.Millisecond), totalFiles)\n 346→\n 347→\tif len(clusterErrors) > 0 {\n 348→\t\treturn totalFiles, fmt.Errorf(\"archiving failed for clusters: %s\", strings.Join(clusterErrors, \", \"))\n 349→\t}\n 350→\n 351→\treturn totalFiles, nil\n 352→}\n 353→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"ca3a8dc7-5798-4369-8e10-32848db0c893","timestamp":"2026-04-01T13:17:42.035Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"5a3269e5-8c15-40a6-9048-e7c17152ec63","timestamp":"2026-04-01T13:17:42.149Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"5a3269e5-8c15-40a6-9048-e7c17152ec63","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015mzV4vTf1ybAoEmXSZsxTT","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides level.go: Hierarchical tree structure for metric storage.\n 7→//\n 8→// # Level Architecture\n 9→//\n 10→// The Level type forms a tree structure where each node represents a level in the\n 11→// ClusterCockpit hierarchy: cluster → host → socket → core → hwthread, with special\n 12→// nodes for memory domains and accelerators.\n 13→//\n 14→// Structure:\n 15→//\n 16→//\tRoot Level (cluster=\"emmy\")\n 17→//\t├─ Level (host=\"node001\")\n 18→//\t│ ├─ Level (socket=\"0\")\n 19→//\t│ │ ├─ Level (core=\"0\") [stores cpu0 metrics]\n 20→//\t│ │ └─ Level (core=\"1\") [stores cpu1 metrics]\n 21→//\t│ └─ Level (socket=\"1\")\n 22→//\t│ └─ ...\n 23→//\t└─ Level (host=\"node002\")\n 24→//\t └─ ...\n 25→//\n 26→// Each Level can:\n 27→// - Hold data (metrics slice of buffer pointers)\n 28→// - Have child nodes (children map[string]*Level)\n 29→// - Both simultaneously (inner nodes can store aggregated metrics)\n 30→//\n 31→// # Selector Paths\n 32→//\n 33→// Selectors are hierarchical paths: []string{\"cluster\", \"host\", \"component\"}.\n 34→// Example: []string{\"emmy\", \"node001\", \"cpu0\"} navigates to the cpu0 core level.\n 35→//\n 36→// # Concurrency\n 37→//\n 38→// RWMutex protects children map and metrics slice. Read-heavy workload (metric reads)\n 39→// uses RLock. Writes (new levels, buffer updates) use Lock. Double-checked locking\n 40→// prevents races during level creation.\n 41→package metricstore\n 42→\n 43→import (\n 44→\t\"sync\"\n 45→\t\"time\"\n 46→\t\"unsafe\"\n 47→\n 48→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 49→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 50→)\n 51→\n 52→// Level represents a node in the hierarchical metric storage tree.\n 53→//\n 54→// Can be both a leaf or inner node. Inner nodes hold data in 'metrics' for aggregated\n 55→// values (e.g., socket-level metrics derived from core-level data). Named \"Level\"\n 56→// instead of \"node\" to avoid confusion with cluster nodes (hosts).\n 57→//\n 58→// Fields:\n 59→// - children: Map of child level names to Level pointers (e.g., \"cpu0\" → Level)\n 60→// - metrics: Slice of buffer pointers (one per metric, indexed by MetricConfig.offset)\n 61→// - lock: RWMutex for concurrent access (read-heavy, write-rare)\n 62→type Level struct {\n 63→\tchildren map[string]*Level\n 64→\tmetrics []*buffer\n 65→\tlock sync.RWMutex\n 66→}\n 67→\n 68→// findLevelOrCreate navigates to or creates the level specified by selector.\n 69→//\n 70→// Recursively descends the tree, creating missing levels as needed. Uses double-checked\n 71→// locking: RLock first (fast path), then Lock if creation needed (slow path), then\n 72→// re-check after acquiring Lock to handle races.\n 73→//\n 74→// Example selector: []string{\"emmy\", \"node001\", \"cpu0\"}\n 75→// Navigates: root → emmy → node001 → cpu0, creating levels as needed.\n 76→//\n 77→// Parameters:\n 78→// - selector: Hierarchical path (consumed recursively, decreasing depth)\n 79→// - nMetrics: Number of metric slots to allocate in new levels\n 80→//\n 81→// Returns:\n 82→// - *Level: The target level (existing or newly created)\n 83→//\n 84→// Note: sync.Map may improve performance for high-concurrency writes, but current\n 85→// approach suffices for read-heavy workload.\n 86→func (l *Level) findLevelOrCreate(selector []string, nMetrics int) *Level {\n 87→\tif len(selector) == 0 {\n 88→\t\treturn l\n 89→\t}\n 90→\n 91→\t// Allow concurrent reads:\n 92→\tl.lock.RLock()\n 93→\tvar child *Level\n 94→\tvar ok bool\n 95→\tif l.children == nil {\n 96→\t\t// Children map needs to be created...\n 97→\t\tl.lock.RUnlock()\n 98→\t} else {\n 99→\t\tchild, ok = l.children[selector[0]]\n 100→\t\tl.lock.RUnlock()\n 101→\t\tif ok {\n 102→\t\t\treturn child.findLevelOrCreate(selector[1:], nMetrics)\n 103→\t\t}\n 104→\t}\n 105→\n 106→\t// The level does not exist, take write lock for unique access:\n 107→\tl.lock.Lock()\n 108→\t// While this thread waited for the write lock, another thread\n 109→\t// could have created the child node.\n 110→\tif l.children != nil {\n 111→\t\tchild, ok = l.children[selector[0]]\n 112→\t\tif ok {\n 113→\t\t\tl.lock.Unlock()\n 114→\t\t\treturn child.findLevelOrCreate(selector[1:], nMetrics)\n 115→\t\t}\n 116→\t}\n 117→\n 118→\tchild = &Level{\n 119→\t\tmetrics: make([]*buffer, nMetrics),\n 120→\t\tchildren: nil,\n 121→\t}\n 122→\n 123→\tif l.children != nil {\n 124→\t\tl.children[selector[0]] = child\n 125→\t} else {\n 126→\t\tl.children = map[string]*Level{selector[0]: child}\n 127→\t}\n 128→\tl.lock.Unlock()\n 129→\treturn child.findLevelOrCreate(selector[1:], nMetrics)\n 130→}\n 131→\n 132→// collectPaths gathers all selector paths at the specified depth in the tree.\n 133→//\n 134→// Recursively traverses children, collecting paths when currentDepth+1 == targetDepth.\n 135→// Each path is a selector that can be used with findLevel() or findBuffers().\n 136→//\n 137→// Explicitly copies slices to avoid shared underlying arrays between siblings, preventing\n 138→// unintended mutations.\n 139→//\n 140→// Parameters:\n 141→// - currentDepth: Depth of current level (0 = root)\n 142→// - targetDepth: Depth to collect paths from\n 143→// - currentPath: Path accumulated so far\n 144→// - results: Output slice (appended to)\n 145→//\n 146→// Example: collectPaths(0, 2, []string{}, &results) collects all 2-level paths\n 147→// like []string{\"emmy\", \"node001\"}, []string{\"emmy\", \"node002\"}, etc.\n 148→func (l *Level) collectPaths(currentDepth, targetDepth int, currentPath []string, results *[][]string) {\n 149→\tl.lock.RLock()\n 150→\tdefer l.lock.RUnlock()\n 151→\n 152→\tfor key, child := range l.children {\n 153→\t\tif child == nil {\n 154→\t\t\tcontinue\n 155→\t\t}\n 156→\n 157→\t\t// We explicitly make a new slice and copy data to avoid sharing underlying arrays between siblings\n 158→\t\tnewPath := make([]string, len(currentPath))\n 159→\t\tcopy(newPath, currentPath)\n 160→\t\tnewPath = append(newPath, key)\n 161→\n 162→\t\t// Check depth, and just return if depth reached\n 163→\t\tif currentDepth+1 == targetDepth {\n 164→\t\t\t*results = append(*results, newPath)\n 165→\t\t} else {\n 166→\t\t\tchild.collectPaths(currentDepth+1, targetDepth, newPath, results)\n 167→\t\t}\n 168→\t}\n 169→}\n 170→\n 171→// free removes buffers older than the retention threshold from the entire subtree.\n 172→//\n 173→// Recursively frees buffers in this level's metrics and all child levels. Buffers\n 174→// with standard capacity (BufferCap) are returned to the pool. Called by the\n 175→// retention worker to enforce retention policies.\n 176→//\n 177→// Parameters:\n 178→// - t: Retention threshold timestamp (Unix seconds)\n 179→//\n 180→// Returns:\n 181→// - int: Total number of buffers freed in this subtree\n 182→// - error: Non-nil on failure (propagated from children)\n 183→func (l *Level) free(t int64) (int, error) {\n 184→\tn, _, err := l.freeAndCheckEmpty(t)\n 185→\treturn n, err\n 186→}\n 187→\n 188→// freeAndCheckEmpty performs free() and atomically checks if the level is empty\n 189→// while still holding its own lock, avoiding a TOCTOU race between free() and\n 190→// a separate isEmpty() call.\n 191→func (l *Level) freeAndCheckEmpty(t int64) (int, bool, error) {\n 192→\tl.lock.Lock()\n 193→\tdefer l.lock.Unlock()\n 194→\n 195→\tn := 0\n 196→\tfor i, b := range l.metrics {\n 197→\t\tif b != nil {\n 198→\t\t\tdelme, m := b.free(t)\n 199→\t\t\tn += m\n 200→\t\t\tif delme {\n 201→\t\t\t\tif cap(b.data) != BufferCap {\n 202→\t\t\t\t\tb.data = make([]schema.Float, 0, BufferCap)\n 203→\t\t\t\t}\n 204→\t\t\t\tb.lastUsed = time.Now().Unix()\n 205→\t\t\t\tbufferPool.Put(b)\n 206→\t\t\t\tl.metrics[i] = nil\n 207→\t\t\t}\n 208→\t\t}\n 209→\t}\n 210→\n 211→\tfor key, child := range l.children {\n 212→\t\tm, empty, err := child.freeAndCheckEmpty(t)\n 213→\t\tn += m\n 214→\t\tif err != nil {\n 215→\t\t\treturn n, false, err\n 216→\t\t}\n 217→\t\tif empty {\n 218→\t\t\tdelete(l.children, key)\n 219→\t\t}\n 220→\t}\n 221→\n 222→\t// Check emptiness while still holding the lock\n 223→\tempty := len(l.children) == 0\n 224→\tif empty {\n 225→\t\tfor _, b := range l.metrics {\n 226→\t\t\tif b != nil {\n 227→\t\t\t\tempty = false\n 228→\t\t\t\tbreak\n 229→\t\t\t}\n 230→\t\t}\n 231→\t}\n 232→\n 233→\treturn n, empty, nil\n 234→}\n 235→\n 236→// forceFree removes the oldest buffer from each metric chain in the subtree.\n 237→//\n 238→// Unlike free(), which removes based on time threshold, this unconditionally removes\n 239→// the oldest buffer in each chain. Used by MemoryUsageTracker when memory cap is\n 240→// exceeded and time-based retention is insufficient.\n 241→//\n 242→// Recursively processes current level's metrics and all child levels.\n 243→//\n 244→// Returns:\n 245→// - int: Total number of buffers freed in this subtree\n 246→// - error: Non-nil on failure (propagated from children)\n 247→func (l *Level) forceFree() (int, error) {\n 248→\tl.lock.Lock()\n 249→\tdefer l.lock.Unlock()\n 250→\n 251→\tn := 0\n 252→\n 253→\t// Iterate over metrics in the current level\n 254→\tfor i, b := range l.metrics {\n 255→\t\tif b != nil {\n 256→\t\t\t// Attempt to free the oldest buffer in this chain\n 257→\t\t\tdelme, freedCount := b.forceFreeOldest()\n 258→\t\t\tn += freedCount\n 259→\n 260→\t\t\t// If delme is true, it means 'b' itself (the head) was the oldest\n 261→\t\t\t// and needs to be removed from the slice.\n 262→\t\t\tif delme {\n 263→\t\t\t\tb.next = nil\n 264→\t\t\t\tb.prev = nil\n 265→\t\t\t\tif cap(b.data) != BufferCap {\n 266→\t\t\t\t\tb.data = make([]schema.Float, 0, BufferCap)\n 267→\t\t\t\t}\n 268→\t\t\t\tb.lastUsed = time.Now().Unix()\n 269→\t\t\t\tbufferPool.Put(b)\n 270→\t\t\t\tl.metrics[i] = nil\n 271→\t\t\t}\n 272→\t\t}\n 273→\t}\n 274→\n 275→\t// Recursively traverse children\n 276→\tfor _, child := range l.children {\n 277→\t\tm, err := child.forceFree()\n 278→\t\tn += m\n 279→\t\tif err != nil {\n 280→\t\t\treturn n, err\n 281→\t\t}\n 282→\t}\n 283→\n 284→\treturn n, nil\n 285→}\n 286→\n 287→// sizeInBytes calculates the total memory usage of all buffers in the subtree.\n 288→//\n 289→// Recursively sums buffer data sizes (count of Float values × sizeof(Float)) across\n 290→// this level's metrics and all child levels. Used by MemoryUsageTracker to enforce\n 291→// memory cap limits.\n 292→//\n 293→// Returns:\n 294→// - int64: Total bytes used by buffer data in this subtree\n 295→func (l *Level) sizeInBytes() int64 {\n 296→\tl.lock.RLock()\n 297→\tdefer l.lock.RUnlock()\n 298→\tsize := int64(0)\n 299→\n 300→\tfor _, b := range l.metrics {\n 301→\t\tif b != nil {\n 302→\t\t\tsize += b.count() * int64(unsafe.Sizeof(schema.Float(0)))\n 303→\t\t\tsize += b.bufferCount() * int64(unsafe.Sizeof(buffer{}))\n 304→\t\t}\n 305→\t}\n 306→\n 307→\tfor _, child := range l.children {\n 308→\t\tsize += child.sizeInBytes()\n 309→\t}\n 310→\n 311→\treturn size\n 312→}\n 313→\n 314→// findLevel navigates to the level specified by selector, returning nil if not found.\n 315→//\n 316→// Read-only variant of findLevelOrCreate. Does not create missing levels.\n 317→// Recursively descends the tree following the selector path.\n 318→//\n 319→// Parameters:\n 320→// - selector: Hierarchical path (e.g., []string{\"emmy\", \"node001\", \"cpu0\"})\n 321→//\n 322→// Returns:\n 323→// - *Level: The target level, or nil if any component in the path does not exist\n 324→func (l *Level) findLevel(selector []string) *Level {\n 325→\tif len(selector) == 0 {\n 326→\t\treturn l\n 327→\t}\n 328→\n 329→\tl.lock.RLock()\n 330→\tdefer l.lock.RUnlock()\n 331→\n 332→\tlvl := l.children[selector[0]]\n 333→\tif lvl == nil {\n 334→\t\treturn nil\n 335→\t}\n 336→\n 337→\treturn lvl.findLevel(selector[1:])\n 338→}\n 339→\n 340→// findBuffers invokes callback on all buffers matching the selector pattern.\n 341→//\n 342→// Supports flexible selector patterns (from cc-lib/util.Selector):\n 343→// - Exact match: Selector element with String set (e.g., \"node001\")\n 344→// - Group match: Selector element with Group set (e.g., [\"cpu0\", \"cpu2\", \"cpu4\"])\n 345→// - Wildcard: Selector element with Any=true (matches all children)\n 346→//\n 347→// Empty selector (len==0) matches current level's buffer at 'offset' and recursively\n 348→// all descendant buffers at the same offset (used for aggregation queries).\n 349→//\n 350→// Parameters:\n 351→// - selector: Pattern to match (consumed recursively)\n 352→// - offset: Metric index in metrics slice (from MetricConfig.offset)\n 353→// - f: Callback invoked on each matching buffer\n 354→//\n 355→// Returns:\n 356→// - error: First error returned by callback, or nil if all succeeded\n 357→//\n 358→// Example:\n 359→//\n 360→//\t// Find all cpu0 buffers across all hosts:\n 361→//\tfindBuffers([]Selector{{Any: true}, {String: \"cpu0\"}}, metricOffset, callback)\n 362→func (l *Level) findBuffers(selector util.Selector, offset int, f func(b *buffer) error) error {\n 363→\tl.lock.RLock()\n 364→\tdefer l.lock.RUnlock()\n 365→\n 366→\tif len(selector) == 0 {\n 367→\t\tb := l.metrics[offset]\n 368→\t\tif b != nil {\n 369→\t\t\treturn f(b)\n 370→\t\t}\n 371→\n 372→\t\tfor _, lvl := range l.children {\n 373→\t\t\terr := lvl.findBuffers(nil, offset, f)\n 374→\t\t\tif err != nil {\n 375→\t\t\t\treturn err\n 376→\t\t\t}\n 377→\t\t}\n 378→\t\treturn nil\n 379→\t}\n 380→\n 381→\tsel := selector[0]\n 382→\tif len(sel.String) != 0 && l.children != nil {\n 383→\t\tlvl, ok := l.children[sel.String]\n 384→\t\tif ok {\n 385→\t\t\terr := lvl.findBuffers(selector[1:], offset, f)\n 386→\t\t\tif err != nil {\n 387→\t\t\t\treturn err\n 388→\t\t\t}\n 389→\t\t}\n 390→\t\treturn nil\n 391→\t}\n 392→\n 393→\tif sel.Group != nil && l.children != nil {\n 394→\t\tfor _, key := range sel.Group {\n 395→\t\t\tlvl, ok := l.children[key]\n 396→\t\t\tif ok {\n 397→\t\t\t\terr := lvl.findBuffers(selector[1:], offset, f)\n 398→\t\t\t\tif err != nil {\n 399→\t\t\t\t\treturn err\n 400→\t\t\t\t}\n 401→\t\t\t}\n 402→\t\t}\n 403→\t\treturn nil\n 404→\t}\n 405→\n 406→\tif sel.Any && l.children != nil {\n 407→\t\tfor _, lvl := range l.children {\n 408→\t\t\tif err := lvl.findBuffers(selector[1:], offset, f); err != nil {\n 409→\t\t\t\treturn err\n 410→\t\t\t}\n 411→\t\t}\n 412→\t\treturn nil\n 413→\t}\n 414→\n 415→\treturn nil\n 416→}\n 417→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"5b554b18-ccff-4ac9-83a3-6e99e1357d0c","timestamp":"2026-04-01T13:17:42.147Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"eb1eb325-1740-4a83-91d1-5eef639bee43","timestamp":"2026-04-01T13:17:42.149Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"daf79893-ef94-467e-9d15-69f42cfbe94b","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01XNSPzacsMmBUU5HqnSbTzf","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides buffer.go: Time-series data buffer implementation.\n 7→//\n 8→// # Buffer Architecture\n 9→//\n 10→// Each metric at each hierarchical level (cluster/host/cpu/etc.) uses a linked-list\n 11→// chain of fixed-size buffers to store time-series data. This design:\n 12→//\n 13→// - Avoids reallocation/copying when growing (new links added instead)\n 14→// - Enables efficient pooling (buffers returned to sync.Pool)\n 15→// - Supports traversal back in time (via prev pointers)\n 16→// - Maintains temporal ordering (newer data in later buffers)\n 17→//\n 18→// # Buffer Chain Example\n 19→//\n 20→//\t[oldest buffer] <- prev -- [older] <- prev -- [newest buffer (head)]\n 21→//\t start=1000 start=1512 start=2024\n 22→//\t data=[v0...v511] data=[v0...v511] data=[v0...v42]\n 23→//\n 24→// When the head buffer reaches capacity (BufferCap = 512), a new buffer becomes\n 25→// the new head and the old head is linked via prev.\n 26→//\n 27→// # Pooling Strategy\n 28→//\n 29→// sync.Pool reduces GC pressure for the common case (BufferCap-sized allocations).\n 30→// Non-standard capacity buffers are not pooled (e.g., from checkpoint deserialization).\n 31→//\n 32→// # Time Alignment\n 33→//\n 34→// Timestamps are aligned to measurement frequency intervals:\n 35→//\n 36→//\tindex = (timestamp - buffer.start) / buffer.frequency\n 37→//\tactualTime = buffer.start + (frequency / 2) + (index * frequency)\n 38→//\n 39→// Missing data points are represented as NaN values. The read() function performs\n 40→// linear interpolation where possible.\n 41→package metricstore\n 42→\n 43→import (\n 44→\t\"errors\"\n 45→\t\"sync\"\n 46→\t\"time\"\n 47→\n 48→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 49→)\n 50→\n 51→// BufferCap is the default buffer capacity.\n 52→// buffer.data will only ever grow up to its capacity and a new link\n 53→// in the buffer chain will be created if needed so that no copying\n 54→// of data or reallocation needs to happen on writes.\n 55→const BufferCap int = DefaultBufferCapacity\n 56→\n 57→// BufferPool is the global instance.\n 58→// It is initialized immediately when the package loads.\n 59→var bufferPool = NewPersistentBufferPool()\n 60→\n 61→type PersistentBufferPool struct {\n 62→\tpool []*buffer\n 63→\tmu sync.Mutex\n 64→}\n 65→\n 66→// NewPersistentBufferPool creates a dynamic pool for buffers.\n 67→func NewPersistentBufferPool() *PersistentBufferPool {\n 68→\treturn &PersistentBufferPool{\n 69→\t\tpool: make([]*buffer, 0),\n 70→\t}\n 71→}\n 72→\n 73→func (p *PersistentBufferPool) Get() *buffer {\n 74→\tp.mu.Lock()\n 75→\tdefer p.mu.Unlock()\n 76→\n 77→\tn := len(p.pool)\n 78→\tif n == 0 {\n 79→\t\t// Pool is empty, allocate a new one\n 80→\t\treturn &buffer{\n 81→\t\t\tdata: make([]schema.Float, 0, BufferCap),\n 82→\t\t}\n 83→\t}\n 84→\n 85→\t// Reuse existing buffer from the pool\n 86→\tb := p.pool[n-1]\n 87→\tp.pool[n-1] = nil // Avoid memory leak\n 88→\tp.pool = p.pool[:n-1]\n 89→\treturn b\n 90→}\n 91→\n 92→// Put returns b to the pool. The caller must set b.lastUsed = time.Now().Unix()\n 93→// before calling Put so that Clean() can evict idle entries correctly.\n 94→func (p *PersistentBufferPool) Put(b *buffer) {\n 95→\t// Reset the buffer before putting it back\n 96→\tb.data = b.data[:0]\n 97→\n 98→\tp.mu.Lock()\n 99→\tdefer p.mu.Unlock()\n 100→\n 101→\tp.pool = append(p.pool, b)\n 102→}\n 103→\n 104→// GetSize returns the exact number of buffers currently sitting in the pool.\n 105→func (p *PersistentBufferPool) GetSize() int {\n 106→\tp.mu.Lock()\n 107→\tdefer p.mu.Unlock()\n 108→\treturn len(p.pool)\n 109→}\n 110→\n 111→// Clear drains all buffers currently in the pool, allowing the GC to collect them.\n 112→func (p *PersistentBufferPool) Clear() {\n 113→\tp.mu.Lock()\n 114→\tdefer p.mu.Unlock()\n 115→\tfor i := range p.pool {\n 116→\t\tp.pool[i] = nil\n 117→\t}\n 118→\tp.pool = p.pool[:0]\n 119→}\n 120→\n 121→// Clean removes buffers from the pool that haven't been used in the given duration.\n 122→// It uses a simple LRU approach based on the lastUsed timestamp.\n 123→func (p *PersistentBufferPool) Clean(threshold int64) {\n 124→\tp.mu.Lock()\n 125→\tdefer p.mu.Unlock()\n 126→\n 127→\t// Filter in place, retaining only buffers returned to the pool recently enough.\n 128→\tactive := p.pool[:0]\n 129→\tfor _, b := range p.pool {\n 130→\t\tif b.lastUsed >= threshold {\n 131→\t\t\tactive = append(active, b)\n 132→\t\t}\n 133→\t}\n 134→\n 135→\t// Nullify the rest to prevent memory leaks\n 136→\tfor i := len(active); i < len(p.pool); i++ {\n 137→\t\tp.pool[i] = nil\n 138→\t}\n 139→\n 140→\tp.pool = active\n 141→}\n 142→\n 143→var (\n 144→\t// ErrNoData indicates no time-series data exists for the requested metric/level.\n 145→\tErrNoData error = errors.New(\"[METRICSTORE]> no data for this metric/level\")\n 146→\n 147→\t// ErrDataDoesNotAlign indicates that aggregated data from child scopes\n 148→\t// does not align with the parent scope's expected timestamps/intervals.\n 149→\tErrDataDoesNotAlignMissingFront error = errors.New(\"[METRICSTORE]> data from lower granularities does not align (missing data prior to start of the buffers)\")\n 150→\tErrDataDoesNotAlignMissingBack error = errors.New(\"[METRICSTORE]> data from lower granularities does not align (missing data after the end of the buffers)\")\n 151→\tErrDataDoesNotAlignDataLenMismatch error = errors.New(\"[METRICSTORE]> data from lower granularities does not align (collected data length is different than expected data length)\")\n 152→)\n 153→\n 154→// buffer stores time-series data for a single metric at a specific hierarchical level.\n 155→//\n 156→// Buffers form doubly-linked chains ordered by time. When capacity is reached,\n 157→// a new buffer becomes the head and the old head is linked via prev/next.\n 158→//\n 159→// Fields:\n 160→// - prev: Link to older buffer in the chain (nil if this is oldest)\n 161→// - next: Link to newer buffer in the chain (nil if this is newest/head)\n 162→// - data: Time-series values (schema.Float supports NaN for missing data)\n 163→// - frequency: Measurement interval in seconds\n 164→// - start: Start timestamp (adjusted by -frequency/2 for alignment)\n 165→// - archived: True if data has been persisted to disk archive\n 166→// - closed: True if buffer is no longer accepting writes\n 167→//\n 168→// Index calculation: index = (timestamp - start) / frequency\n 169→// Actual data timestamp: start + (frequency / 2) + (index * frequency)\n 170→type buffer struct {\n 171→\tprev *buffer\n 172→\tnext *buffer\n 173→\tdata []schema.Float\n 174→\tfrequency int64\n 175→\tstart int64\n 176→\tarchived bool\n 177→\tclosed bool\n 178→\tlastUsed int64\n 179→}\n 180→\n 181→func newBuffer(ts, freq int64) *buffer {\n 182→\tb := bufferPool.Get()\n 183→\tb.frequency = freq\n 184→\tb.start = ts - (freq / 2)\n 185→\tb.prev = nil\n 186→\tb.next = nil\n 187→\tb.archived = false\n 188→\tb.closed = false\n 189→\tb.data = b.data[:0]\n 190→\treturn b\n 191→}\n 192→\n 193→// write appends a timestamped value to the buffer chain.\n 194→//\n 195→// Returns the head buffer (which may be newly created if capacity was reached).\n 196→// Timestamps older than the buffer's start are rejected. If the calculated index\n 197→// exceeds capacity, a new buffer is allocated and linked as the new head.\n 198→//\n 199→// Missing timestamps are automatically filled with NaN values to maintain alignment.\n 200→// Overwrites are allowed if the index is already within the existing data slice.\n 201→//\n 202→// Parameters:\n 203→// - ts: Unix timestamp in seconds\n 204→// - value: Metric value (can be schema.NaN for missing data)\n 205→//\n 206→// Returns:\n 207→// - *buffer: The new head buffer (same as b if no new buffer created)\n 208→// - error: Non-nil if timestamp is before buffer start\n 209→func (b *buffer) write(ts int64, value schema.Float) (*buffer, error) {\n 210→\tif ts < b.start {\n 211→\t\treturn nil, errors.New(\"[METRICSTORE]> cannot write value to buffer from past\")\n 212→\t}\n 213→\n 214→\t// idx := int((ts - b.start + (b.frequency / 3)) / b.frequency)\n 215→\tidx := int((ts - b.start) / b.frequency)\n 216→\tif idx >= cap(b.data) {\n 217→\t\tnewbuf := newBuffer(ts, b.frequency)\n 218→\t\tnewbuf.prev = b\n 219→\t\tb.next = newbuf\n 220→\t\tb = newbuf\n 221→\t\tidx = 0\n 222→\t}\n 223→\n 224→\t// Overwriting value or writing value from past\n 225→\tif idx < len(b.data) {\n 226→\t\tb.data[idx] = value\n 227→\t\treturn b, nil\n 228→\t}\n 229→\n 230→\t// Fill up unwritten slots with NaN\n 231→\tfor i := len(b.data); i < idx; i++ {\n 232→\t\tb.data = append(b.data, schema.NaN)\n 233→\t}\n 234→\n 235→\tb.data = append(b.data, value)\n 236→\treturn b, nil\n 237→}\n 238→\n 239→func (b *buffer) end() int64 {\n 240→\treturn b.firstWrite() + int64(len(b.data))*b.frequency\n 241→}\n 242→\n 243→func (b *buffer) firstWrite() int64 {\n 244→\treturn b.start + (b.frequency / 2)\n 245→}\n 246→\n 247→// read retrieves time-series data from the buffer chain for the specified time range.\n 248→//\n 249→// Traverses the buffer chain backwards (via prev links) if 'from' precedes the current\n 250→// buffer's start. Missing data points are represented as NaN. Values are accumulated\n 251→// into the provided 'data' slice (using +=, so caller must zero-initialize if needed).\n 252→//\n 253→// The function adjusts the actual time range returned if data is unavailable at the\n 254→// boundaries (returned via adjusted from/to timestamps).\n 255→//\n 256→// Parameters:\n 257→// - from: Start timestamp (Unix seconds)\n 258→// - to: End timestamp (Unix seconds, exclusive)\n 259→// - data: Pre-allocated slice to accumulate results (must be large enough)\n 260→//\n 261→// Returns:\n 262→// - []schema.Float: Slice of data (may be shorter than input 'data' slice)\n 263→// - int64: Actual start timestamp with available data\n 264→// - int64: Actual end timestamp (exclusive)\n 265→// - error: Non-nil on failure\n 266→//\n 267→// Panics if 'data' slice is too small to hold all values in [from, to).\n 268→func (b *buffer) read(from, to int64, data []schema.Float) ([]schema.Float, int64, int64, error) {\n 269→\t// Walk back to the buffer that covers 'from', adjusting if we hit the oldest.\n 270→\tfor from < b.firstWrite() {\n 271→\t\tif b.prev == nil {\n 272→\t\t\tfrom = b.firstWrite()\n 273→\t\t\tbreak\n 274→\t\t}\n 275→\t\tb = b.prev\n 276→\t}\n 277→\n 278→\ti := 0\n 279→\tt := from\n 280→\tfor ; t < to; t += b.frequency {\n 281→\t\tidx := int((t - b.start) / b.frequency)\n 282→\t\tif idx >= cap(b.data) {\n 283→\t\t\tif b.next == nil {\n 284→\t\t\t\tbreak\n 285→\t\t\t}\n 286→\t\t\tb = b.next\n 287→\t\t\t// Recalculate idx in the new buffer; a gap between buffers may exist.\n 288→\t\t\tidx = int((t - b.start) / b.frequency)\n 289→\t\t}\n 290→\n 291→\t\tif idx >= len(b.data) {\n 292→\t\t\tif b.next == nil || to <= b.next.start {\n 293→\t\t\t\tbreak\n 294→\t\t\t}\n 295→\t\t\tdata[i] += schema.NaN // NaN + anything = NaN; propagates missing data\n 296→\t\t} else if t < b.start {\n 297→\t\t\tdata[i] += schema.NaN // gap before this buffer's first write\n 298→\t\t} else {\n 299→\t\t\tdata[i] += b.data[idx]\n 300→\t\t}\n 301→\t\ti++\n 302→\t}\n 303→\n 304→\treturn data[:i], from, t, nil\n 305→}\n 306→\n 307→// free removes buffers older than the specified timestamp from the chain.\n 308→//\n 309→// Recursively traverses backwards (via prev) and unlinks buffers whose end time\n 310→// is before the retention threshold. Freed buffers are returned to the pool if\n 311→// they have the standard capacity (BufferCap).\n 312→//\n 313→// Parameters:\n 314→// - t: Retention threshold timestamp (Unix seconds)\n 315→//\n 316→// Returns:\n 317→// - delme: True if the current buffer itself should be deleted by caller\n 318→// - n: Number of buffers freed in this subtree\n 319→func (b *buffer) free(t int64) (delme bool, n int) {\n 320→\tif b.prev != nil {\n 321→\t\tdelme, m := b.prev.free(t)\n 322→\t\tn += m\n 323→\t\tif delme {\n 324→\t\t\tb.prev.next = nil\n 325→\t\t\tif cap(b.prev.data) != BufferCap {\n 326→\t\t\t\tb.prev.data = make([]schema.Float, 0, BufferCap)\n 327→\t\t\t}\n 328→\t\t\tb.prev.lastUsed = time.Now().Unix()\n 329→\t\t\tbufferPool.Put(b.prev)\n 330→\t\t\tb.prev = nil\n 331→\t\t}\n 332→\t}\n 333→\n 334→\tend := b.end()\n 335→\tif end < t {\n 336→\t\treturn true, n + 1\n 337→\t}\n 338→\n 339→\treturn false, n\n 340→}\n 341→\n 342→// forceFreeOldest recursively finds the end of the linked list (the oldest buffer)\n 343→// and removes it.\n 344→// Returns:\n 345→//\n 346→//\tdelme: true if 'b' itself is the oldest and should be removed by the caller\n 347→//\tn: the number of buffers freed (will be 1 or 0)\n 348→func (b *buffer) forceFreeOldest() (delme bool, n int) {\n 349→\t// If there is a previous buffer, recurse down to find the oldest\n 350→\tif b.prev != nil {\n 351→\t\tdelPrev, freed := b.prev.forceFreeOldest()\n 352→\n 353→\t\t// If the previous buffer signals it should be deleted:\n 354→\t\tif delPrev {\n 355→\t\t\tb.prev.next = nil\n 356→\t\t\tif cap(b.prev.data) != BufferCap {\n 357→\t\t\t\tb.prev.data = make([]schema.Float, 0, BufferCap)\n 358→\t\t\t}\n 359→\t\t\tb.prev.lastUsed = time.Now().Unix()\n 360→\t\t\tbufferPool.Put(b.prev)\n 361→\t\t\tb.prev = nil\n 362→\t\t}\n 363→\t\treturn false, freed\n 364→\t}\n 365→\n 366→\t// If b.prev is nil, THIS buffer is the oldest.\n 367→\t// We return true so the parent (or the Level loop) knows to delete reference to 'b'.\n 368→\treturn true, 1\n 369→}\n 370→\n 371→// iterFromTo invokes callback on every buffer in the chain that overlaps [from, to].\n 372→//\n 373→// Traverses backwards (via prev) first, then processes current buffer if it overlaps\n 374→// the time range. Used for checkpoint/archive operations that need to serialize buffers\n 375→// within a specific time window.\n 376→//\n 377→// Parameters:\n 378→// - from: Start timestamp (Unix seconds, inclusive)\n 379→// - to: End timestamp (Unix seconds, inclusive)\n 380→// - callback: Function to invoke on each overlapping buffer\n 381→//\n 382→// Returns:\n 383→// - error: First error returned by callback, or nil if all succeeded\n 384→func (b *buffer) iterFromTo(from, to int64, callback func(b *buffer) error) error {\n 385→\tif b == nil {\n 386→\t\treturn nil\n 387→\t}\n 388→\n 389→\t// Collect overlapping buffers walking backwards (newest → oldest).\n 390→\tvar matching []*buffer\n 391→\tfor cur := b; cur != nil; cur = cur.prev {\n 392→\t\tif from <= cur.end() && cur.start <= to {\n 393→\t\t\tmatching = append(matching, cur)\n 394→\t\t}\n 395→\t}\n 396→\n 397→\t// Invoke callback in chronological order (oldest → newest).\n 398→\tfor i := len(matching) - 1; i >= 0; i-- {\n 399→\t\tif err := callback(matching[i]); err != nil {\n 400→\t\t\treturn err\n 401→\t\t}\n 402→\t}\n 403→\treturn nil\n 404→}\n 405→\n 406→func (b *buffer) count() int64 {\n 407→\tvar res int64\n 408→\tfor ; b != nil; b = b.prev {\n 409→\t\tres += int64(len(b.data))\n 410→\t}\n 411→\treturn res\n 412→}\n 413→\n 414→// bufferCount returns the number of buffer nodes in the linked list.\n 415→func (b *buffer) bufferCount() int64 {\n 416→\tvar n int64\n 417→\tfor ; b != nil; b = b.prev {\n 418→\t\tn++\n 419→\t}\n 420→\treturn n\n 421→}\n 422→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"1adde63b-aa34-430d-a970-4876e26758ef","timestamp":"2026-04-01T13:17:42.425Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"0f5b3747-d3dc-435e-858b-61e0998aa4aa","timestamp":"2026-04-01T13:17:42.426Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"3b5d7787-a8f0-4516-9d35-8307f9e1a735","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01GebZETCTJ8PjGa3VzMTUqG","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides walCheckpoint.go: WAL-based checkpoint implementation.\n 7→//\n 8→// This replaces the Avro shadow tree with an append-only Write-Ahead Log (WAL)\n 9→// per host, eliminating the extra memory overhead of the AvroStore and providing\n 10→// truly continuous (per-write) crash safety.\n 11→//\n 12→// # Architecture\n 13→//\n 14→//\tMetric write (DecodeLine)\n 15→//\t │\n 16→//\t ├─► WriteToLevel() → main MemoryStore (unchanged)\n 17→//\t │\n 18→//\t └─► WALMessages channel\n 19→//\t │\n 20→//\t ▼\n 21→//\t WALStaging goroutine\n 22→//\t │\n 23→//\t ▼\n 24→//\t checkpoints/cluster/host/current.wal (append-only, binary)\n 25→//\n 26→//\tPeriodic checkpoint (Checkpointing goroutine):\n 27→//\t 1. Write <timestamp>.bin snapshot (column-oriented, from main tree)\n 28→//\t 2. Signal WALStaging to truncate current.wal per host\n 29→//\n 30→//\tOn restart (FromCheckpoint):\n 31→//\t 1. Load most recent <timestamp>.bin snapshot\n 32→//\t 2. Replay current.wal (overwrite-safe: buffer.write handles duplicate timestamps)\n 33→//\n 34→// # WAL Record Format\n 35→//\n 36→//\t[4B magic 0xCC1DA7A1][4B payload_len][payload][4B CRC32]\n 37→//\n 38→//\tpayload:\n 39→//\t [8B timestamp int64]\n 40→//\t [2B metric_name_len uint16][N metric name bytes]\n 41→//\t [1B selector_count uint8]\n 42→//\t per selector: [1B selector_len uint8][M selector bytes]\n 43→//\t [4B value float32 bits]\n 44→//\n 45→// # Binary Snapshot Format\n 46→//\n 47→//\t[4B magic 0xCC5B0001][8B from int64][8B to int64]\n 48→//\tLevel tree (recursive):\n 49→//\t [4B num_metrics uint32]\n 50→//\t per metric:\n 51→//\t [2B name_len uint16][N name bytes]\n 52→//\t [8B frequency int64][8B start int64]\n 53→//\t [4B num_values uint32][num_values × 4B float32]\n 54→//\t [4B num_children uint32]\n 55→//\t per child: [2B name_len uint16][N name bytes] + Level (recursive)\n 56→package metricstore\n 57→\n 58→import (\n 59→\t\"bufio\"\n 60→\t\"context\"\n 61→\t\"encoding/binary\"\n 62→\t\"fmt\"\n 63→\t\"hash/crc32\"\n 64→\t\"hash/fnv\"\n 65→\t\"io\"\n 66→\t\"math\"\n 67→\t\"os\"\n 68→\t\"path\"\n 69→\t\"strings\"\n 70→\t\"sync\"\n 71→\t\"sync/atomic\"\n 72→\t\"time\"\n 73→\n 74→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 75→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 76→)\n 77→\n 78→// Magic numbers for binary formats.\n 79→const (\n 80→\twalFileMagic = uint32(0xCC1DA701) // WAL file header magic\n 81→\twalRecordMagic = uint32(0xCC1DA7A1) // WAL record magic\n 82→\tsnapFileMagic = uint32(0xCC5B0001) // Binary snapshot magic\n 83→)\n 84→\n 85→// walShardChs holds per-shard channels for WAL messages.\n 86→// Initialized by WALStaging; nil when WAL is not active.\n 87→var walShardChs []chan *WALMessage\n 88→\n 89→// walShardRotateChs holds per-shard channels for WAL rotation requests.\n 90→var walShardRotateChs []chan walRotateReq\n 91→\n 92→// walNumShards stores the number of shards (set during WALStaging init).\n 93→var walNumShards int\n 94→\n 95→// walStagingWg tracks WALStaging goroutine exits for shutdown synchronization.\n 96→var walStagingWg sync.WaitGroup\n 97→\n 98→// walShuttingDown is set before closing shard channels to prevent\n 99→// SendWALMessage from sending on a closed channel (which panics in Go).\n 100→var walShuttingDown atomic.Bool\n 101→\n 102→// walCheckpointActive is set during binary checkpoint writes.\n 103→// While active, SendWALMessage skips sending (returns true) because the\n 104→// snapshot captures all in-memory data, making WAL writes redundant.\n 105→var walCheckpointActive atomic.Bool\n 106→\n 107→// WALMessage represents a single metric write to be appended to the WAL.\n 108→// Cluster and Node are NOT stored in the WAL record (inferred from file path).\n 109→type WALMessage struct {\n 110→\tMetricName string\n 111→\tCluster string\n 112→\tNode string\n 113→\tSelector []string\n 114→\tValue schema.Float\n 115→\tTimestamp int64\n 116→}\n 117→\n 118→// walRotateReq requests WAL file rotation for a specific host directory.\n 119→// The done channel is closed by the WAL goroutine when rotation is complete.\n 120→type walRotateReq struct {\n 121→\thostDir string\n 122→\tdone chan struct{}\n 123→}\n 124→\n 125→// walFileState holds an open WAL file handle and buffered writer for one host directory.\n 126→type walFileState struct {\n 127→\tf *os.File\n 128→\tw *bufio.Writer\n 129→\tdirty bool\n 130→\tsize int64 // approximate bytes written (tracked from open + writes)\n 131→}\n 132→\n 133→// walFlushInterval controls how often dirty WAL files are flushed to disk.\n 134→// Decoupling flushes from message processing lets the consumer run at memory\n 135→// speed, amortizing syscall overhead across many writes.\n 136→const walFlushInterval = 1 * time.Second\n 137→\n 138→// walShardIndex computes which shard a message belongs to based on cluster+node.\n 139→// Uses FNV-1a hash for fast, well-distributed mapping.\n 140→func walShardIndex(cluster, node string) int {\n 141→\th := fnv.New32a()\n 142→\th.Write([]byte(cluster))\n 143→\th.Write([]byte{0})\n 144→\th.Write([]byte(node))\n 145→\treturn int(h.Sum32()) % walNumShards\n 146→}\n 147→\n 148→// SendWALMessage routes a WAL message to the appropriate shard channel.\n 149→// Returns false if the channel is full or shutdown is in progress.\n 150→func SendWALMessage(msg *WALMessage) bool {\n 151→\tif walShardChs == nil || walShuttingDown.Load() {\n 152→\t\treturn false\n 153→\t}\n 154→\tif walCheckpointActive.Load() {\n 155→\t\treturn true // Data safe in memory; snapshot will capture it\n 156→\t}\n 157→\tshard := walShardIndex(msg.Cluster, msg.Node)\n 158→\tselect {\n 159→\tcase walShardChs[shard] <- msg:\n 160→\t\treturn true\n 161→\tdefault:\n 162→\t\treturn false\n 163→\t}\n 164→}\n 165→\n 166→// WALStaging starts N sharded background goroutines that receive WALMessage items\n 167→// and append binary WAL records to per-host current.wal files.\n 168→// Each shard owns a subset of hosts (determined by hash of cluster+node),\n 169→// parallelizing serialization and I/O while keeping per-host writes serial.\n 170→func WALStaging(wg *sync.WaitGroup, ctx context.Context) {\n 171→\tif Keys.Checkpoints.FileFormat == \"json\" {\n 172→\t\treturn\n 173→\t}\n 174→\n 175→\twalNumShards = max(Keys.NumWorkers, 1)\n 176→\tchBufSize := max(65536/walNumShards, 1024)\n 177→\n 178→\twalShardChs = make([]chan *WALMessage, walNumShards)\n 179→\twalShardRotateChs = make([]chan walRotateReq, walNumShards)\n 180→\n 181→\tfor i := range walNumShards {\n 182→\t\twalShardChs[i] = make(chan *WALMessage, chBufSize)\n 183→\t\twalShardRotateChs[i] = make(chan walRotateReq, 64)\n 184→\t}\n 185→\n 186→\tfor i := range walNumShards {\n 187→\t\tmsgCh := walShardChs[i]\n 188→\t\trotateCh := walShardRotateChs[i]\n 189→\n 190→\t\twalStagingWg.Add(1)\n 191→\t\twg.Go(func() {\n 192→\t\t\tdefer walStagingWg.Done()\n 193→\t\t\thostFiles := make(map[string]*walFileState)\n 194→\n 195→\t\t\tdefer func() {\n 196→\t\t\t\tfor _, ws := range hostFiles {\n 197→\t\t\t\t\tif ws.f != nil {\n 198→\t\t\t\t\t\tws.w.Flush()\n 199→\t\t\t\t\t\tws.f.Close()\n 200→\t\t\t\t\t}\n 201→\t\t\t\t}\n 202→\t\t\t}()\n 203→\n 204→\t\t\tgetOrOpenWAL := func(hostDir string) *walFileState {\n 205→\t\t\t\tws, ok := hostFiles[hostDir]\n 206→\t\t\t\tif ok {\n 207→\t\t\t\t\treturn ws\n 208→\t\t\t\t}\n 209→\n 210→\t\t\t\tif err := os.MkdirAll(hostDir, CheckpointDirPerms); err != nil {\n 211→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: mkdir %s: %v\", hostDir, err)\n 212→\t\t\t\t\treturn nil\n 213→\t\t\t\t}\n 214→\n 215→\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n 216→\t\t\t\tf, err := os.OpenFile(walPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, CheckpointFilePerms)\n 217→\t\t\t\tif err != nil {\n 218→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: open %s: %v\", walPath, err)\n 219→\t\t\t\t\treturn nil\n 220→\t\t\t\t}\n 221→\n 222→\t\t\t\tw := bufio.NewWriter(f)\n 223→\n 224→\t\t\t\t// Write file header magic if file is new (empty).\n 225→\t\t\t\tinfo, err := f.Stat()\n 226→\t\t\t\tvar fileSize int64\n 227→\t\t\t\tif err == nil {\n 228→\t\t\t\t\tfileSize = info.Size()\n 229→\t\t\t\t}\n 230→\t\t\t\tif err == nil && fileSize == 0 {\n 231→\t\t\t\t\tvar hdr [4]byte\n 232→\t\t\t\t\tbinary.LittleEndian.PutUint32(hdr[:], walFileMagic)\n 233→\t\t\t\t\tif _, err := w.Write(hdr[:]); err != nil {\n 234→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write header %s: %v\", walPath, err)\n 235→\t\t\t\t\t\tf.Close()\n 236→\t\t\t\t\t\treturn nil\n 237→\t\t\t\t\t}\n 238→\t\t\t\t\tfileSize = 4\n 239→\t\t\t\t}\n 240→\n 241→\t\t\t\tws = &walFileState{f: f, w: w, size: fileSize}\n 242→\t\t\t\thostFiles[hostDir] = ws\n 243→\t\t\t\treturn ws\n 244→\t\t\t}\n 245→\n 246→\t\t\tprocessMsg := func(msg *WALMessage) {\n 247→\t\t\t\thostDir := path.Join(Keys.Checkpoints.RootDir, msg.Cluster, msg.Node)\n 248→\t\t\t\tws := getOrOpenWAL(hostDir)\n 249→\t\t\t\tif ws == nil {\n 250→\t\t\t\t\treturn\n 251→\t\t\t\t}\n 252→\n 253→\t\t\t\t// Enforce max WAL size: force-rotate before writing if limit is exceeded.\n 254→\t\t\t\t// The in-memory store still holds the data; only crash-recovery coverage is lost.\n 255→\t\t\t\tif maxSize := Keys.Checkpoints.MaxWALSize; maxSize > 0 && ws.size >= maxSize {\n 256→\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL: force-rotating %s (size %d >= limit %d)\",\n 257→\t\t\t\t\t\thostDir, ws.size, maxSize)\n 258→\t\t\t\t\tws.w.Flush()\n 259→\t\t\t\t\tws.f.Close()\n 260→\t\t\t\t\twalPath := path.Join(hostDir, \"current.wal\")\n 261→\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n 262→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n 263→\t\t\t\t\t}\n 264→\t\t\t\t\tdelete(hostFiles, hostDir)\n 265→\t\t\t\t\tws = getOrOpenWAL(hostDir)\n 266→\t\t\t\t\tif ws == nil {\n 267→\t\t\t\t\t\treturn\n 268→\t\t\t\t\t}\n 269→\t\t\t\t}\n 270→\n 271→\t\t\t\tn, err := writeWALRecordDirect(ws.w, msg)\n 272→\t\t\t\tif err != nil {\n 273→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: write record: %v\", err)\n 274→\t\t\t\t}\n 275→\t\t\t\tws.size += int64(n)\n 276→\t\t\t\tws.dirty = true\n 277→\t\t\t}\n 278→\n 279→\t\t\tprocessRotate := func(req walRotateReq) {\n 280→\t\t\t\tws, ok := hostFiles[req.hostDir]\n 281→\t\t\t\tif ok && ws.f != nil {\n 282→\t\t\t\t\tws.w.Flush()\n 283→\t\t\t\t\tws.f.Close()\n 284→\t\t\t\t\twalPath := path.Join(req.hostDir, \"current.wal\")\n 285→\t\t\t\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n 286→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n 287→\t\t\t\t\t}\n 288→\t\t\t\t\tdelete(hostFiles, req.hostDir)\n 289→\t\t\t\t}\n 290→\t\t\t\tclose(req.done)\n 291→\t\t\t}\n 292→\n 293→\t\t\tflushDirty := func() {\n 294→\t\t\t\tfor _, ws := range hostFiles {\n 295→\t\t\t\t\tif ws.dirty {\n 296→\t\t\t\t\t\tws.w.Flush()\n 297→\t\t\t\t\t\tws.dirty = false\n 298→\t\t\t\t\t}\n 299→\t\t\t\t}\n 300→\t\t\t}\n 301→\n 302→\t\t\tticker := time.NewTicker(walFlushInterval)\n 303→\t\t\tdefer ticker.Stop()\n 304→\n 305→\t\t\t// drainBatch processes up to 4096 pending messages without blocking.\n 306→\t\t\t// Returns false if the channel was closed.\n 307→\t\t\tdrainBatch := func() bool {\n 308→\t\t\t\tfor range 4096 {\n 309→\t\t\t\t\tselect {\n 310→\t\t\t\t\tcase msg, ok := <-msgCh:\n 311→\t\t\t\t\t\tif !ok {\n 312→\t\t\t\t\t\t\tflushDirty()\n 313→\t\t\t\t\t\t\treturn false\n 314→\t\t\t\t\t\t}\n 315→\t\t\t\t\t\tprocessMsg(msg)\n 316→\t\t\t\t\tcase req := <-rotateCh:\n 317→\t\t\t\t\t\tprocessRotate(req)\n 318→\t\t\t\t\tdefault:\n 319→\t\t\t\t\t\treturn true\n 320→\t\t\t\t\t}\n 321→\t\t\t\t}\n 322→\t\t\t\treturn true\n 323→\t\t\t}\n 324→\n 325→\t\t\tfor {\n 326→\t\t\t\tselect {\n 327→\t\t\t\tcase <-ctx.Done():\n 328→\t\t\t\t\t// On shutdown, skip draining buffered messages — a full binary\n 329→\t\t\t\t\t// checkpoint will be written from in-memory state, making\n 330→\t\t\t\t\t// buffered WAL records redundant.\n 331→\t\t\t\t\tflushDirty()\n 332→\t\t\t\t\treturn\n 333→\t\t\t\tcase msg, ok := <-msgCh:\n 334→\t\t\t\t\tif !ok {\n 335→\t\t\t\t\t\treturn\n 336→\t\t\t\t\t}\n 337→\t\t\t\t\tprocessMsg(msg)\n 338→\t\t\t\t\tif !drainBatch() {\n 339→\t\t\t\t\t\treturn\n 340→\t\t\t\t\t}\n 341→\t\t\t\t\t// No flush here — timer handles periodic flushing.\n 342→\t\t\t\tcase <-ticker.C:\n 343→\t\t\t\t\tflushDirty()\n 344→\t\t\t\tcase req := <-rotateCh:\n 345→\t\t\t\t\tprocessRotate(req)\n 346→\t\t\t\t}\n 347→\t\t\t}\n 348→\t\t})\n 349→\t}\n 350→}\n 351→\n 352→// WaitForWALStagingDrain blocks until all WALStaging goroutines have exited.\n 353→// Must be called after closing walShardChs to ensure all file handles are\n 354→// flushed and closed before checkpoint writes begin.\n 355→func WaitForWALStagingDrain() {\n 356→\twalStagingWg.Wait()\n 357→}\n 358→\n 359→// RotateWALFiles sends rotation requests for the given host directories\n 360→// and blocks until all rotations complete. Each request is routed to the\n 361→// shard that owns the host directory.\n 362→//\n 363→// If shutdown is in progress (WAL staging goroutines may have exited),\n 364→// rotation is skipped to avoid deadlocking on abandoned channels.\n 365→func RotateWALFiles(hostDirs []string) {\n 366→\tif walShardRotateChs == nil || walShuttingDown.Load() {\n 367→\t\treturn\n 368→\t}\n 369→\tdeadline := time.After(2 * time.Minute)\n 370→\tdones := make([]chan struct{}, 0, len(hostDirs))\n 371→\tfor _, dir := range hostDirs {\n 372→\t\tdone := make(chan struct{})\n 373→\t\tshard := walShardIndexFromDir(dir)\n 374→\t\tselect {\n 375→\t\tcase walShardRotateChs[shard] <- walRotateReq{hostDir: dir, done: done}:\n 376→\t\t\tdones = append(dones, done)\n 377→\t\tcase <-deadline:\n 378→\t\t\tcclog.Warnf(\"[METRICSTORE]> WAL rotation send timed out, %d of %d hosts remaining\",\n 379→\t\t\t\tlen(hostDirs)-len(dones), len(hostDirs))\n 380→\t\t\tgoto waitDones\n 381→\t\t}\n 382→\t}\n 383→waitDones:\n 384→\tfor _, done := range dones {\n 385→\t\tselect {\n 386→\t\tcase <-done:\n 387→\t\tcase <-time.After(30 * time.Second):\n 388→\t\t\tcclog.Warn(\"[METRICSTORE]> WAL rotation completion timed out, continuing\")\n 389→\t\t\treturn\n 390→\t\t}\n 391→\t}\n 392→}\n 393→\n 394→// walShardIndexFromDir extracts cluster and node from a host directory path\n 395→// and returns the shard index. The path format is: rootDir/cluster/node\n 396→func walShardIndexFromDir(hostDir string) int {\n 397→\t// hostDir = .../cluster/node — extract last two path components\n 398→\tnode := path.Base(hostDir)\n 399→\tcluster := path.Base(path.Dir(hostDir))\n 400→\treturn walShardIndex(cluster, node)\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"ae7e4f4a-8ed9-49b3-ae7e-9edf6bb7004f","timestamp":"2026-04-01T13:17:46.512Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"2cf38639-0bdc-457e-959e-8fc9e8415fe5","timestamp":"2026-04-01T13:17:46.560Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"745878f2-d03b-48c4-871a-61a295705aea","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01R7Z89Cnu3TT2GUwscx1jcK","type":"tool_result","content":" 400→\treturn walShardIndex(cluster, node)\n 401→}\n 402→\n 403→// RotateWALFilesAfterShutdown directly removes current.wal files for the given\n 404→// host directories. Used after shutdown, when WALStaging goroutines have already\n 405→// exited and the channel-based RotateWALFiles is no longer safe to call.\n 406→func RotateWALFilesAfterShutdown(hostDirs []string) {\n 407→\tfor _, dir := range hostDirs {\n 408→\t\twalPath := path.Join(dir, \"current.wal\")\n 409→\t\tif err := os.Remove(walPath); err != nil && !os.IsNotExist(err) {\n 410→\t\t\tcclog.Errorf(\"[METRICSTORE]> WAL: remove %s: %v\", walPath, err)\n 411→\t\t}\n 412→\t}\n 413→}\n 414→\n 415→// writeWALRecordDirect encodes a WAL record into a contiguous buffer first,\n 416→// then writes it to the bufio.Writer in a single call. This prevents partial\n 417→// records in the write buffer if a write error occurs mid-record (e.g. disk full).\n 418→// Returns the number of bytes written and any error.\n 419→func writeWALRecordDirect(w *bufio.Writer, msg *WALMessage) (int, error) {\n 420→\t// Compute payload and total record size.\n 421→\tpayloadSize := 8 + 2 + len(msg.MetricName) + 1 + 4\n 422→\tfor _, s := range msg.Selector {\n 423→\t\tpayloadSize += 1 + len(s)\n 424→\t}\n 425→\t// Total: 8 (header) + payload + 4 (CRC).\n 426→\ttotalSize := 8 + payloadSize + 4\n 427→\n 428→\t// Use stack buffer for typical small records, heap-allocate only for large ones.\n 429→\tvar stackBuf [256]byte\n 430→\tvar buf []byte\n 431→\tif totalSize <= len(stackBuf) {\n 432→\t\tbuf = stackBuf[:totalSize]\n 433→\t} else {\n 434→\t\tbuf = make([]byte, totalSize)\n 435→\t}\n 436→\n 437→\t// Header: magic + payload length.\n 438→\tbinary.LittleEndian.PutUint32(buf[0:4], walRecordMagic)\n 439→\tbinary.LittleEndian.PutUint32(buf[4:8], uint32(payloadSize))\n 440→\n 441→\t// Payload starts at offset 8.\n 442→\tp := 8\n 443→\n 444→\t// Timestamp (8 bytes).\n 445→\tbinary.LittleEndian.PutUint64(buf[p:p+8], uint64(msg.Timestamp))\n 446→\tp += 8\n 447→\n 448→\t// Metric name length (2 bytes) + metric name.\n 449→\tbinary.LittleEndian.PutUint16(buf[p:p+2], uint16(len(msg.MetricName)))\n 450→\tp += 2\n 451→\tp += copy(buf[p:], msg.MetricName)\n 452→\n 453→\t// Selector count (1 byte).\n 454→\tbuf[p] = byte(len(msg.Selector))\n 455→\tp++\n 456→\n 457→\t// Selectors (1-byte length + bytes each).\n 458→\tfor _, sel := range msg.Selector {\n 459→\t\tbuf[p] = byte(len(sel))\n 460→\t\tp++\n 461→\t\tp += copy(buf[p:], sel)\n 462→\t}\n 463→\n 464→\t// Value (4 bytes, float32 bits).\n 465→\tbinary.LittleEndian.PutUint32(buf[p:p+4], math.Float32bits(float32(msg.Value)))\n 466→\tp += 4\n 467→\n 468→\t// CRC32 over payload (bytes 8..8+payloadSize).\n 469→\tcrc := crc32.ChecksumIEEE(buf[8 : 8+payloadSize])\n 470→\tbinary.LittleEndian.PutUint32(buf[p:p+4], crc)\n 471→\n 472→\t// Single atomic write to the buffered writer.\n 473→\tn, err := w.Write(buf)\n 474→\treturn n, err\n 475→}\n 476→\n 477→// readWALRecord reads one WAL record from the reader.\n 478→// Returns (nil, nil) on clean EOF. Returns error on data corruption.\n 479→// A CRC mismatch indicates a truncated trailing record (expected on crash).\n 480→func readWALRecord(r io.Reader) (*WALMessage, error) {\n 481→\tvar magic uint32\n 482→\tif err := binary.Read(r, binary.LittleEndian, &magic); err != nil {\n 483→\t\tif err == io.EOF {\n 484→\t\t\treturn nil, nil // Clean EOF\n 485→\t\t}\n 486→\t\treturn nil, fmt.Errorf(\"read record magic: %w\", err)\n 487→\t}\n 488→\n 489→\tif magic != walRecordMagic {\n 490→\t\treturn nil, fmt.Errorf(\"invalid record magic 0x%08X (expected 0x%08X)\", magic, walRecordMagic)\n 491→\t}\n 492→\n 493→\tvar payloadLen uint32\n 494→\tif err := binary.Read(r, binary.LittleEndian, &payloadLen); err != nil {\n 495→\t\treturn nil, fmt.Errorf(\"read payload length: %w\", err)\n 496→\t}\n 497→\n 498→\tif payloadLen > 1<<20 { // 1 MB sanity limit\n 499→\t\treturn nil, fmt.Errorf(\"record payload too large: %d bytes\", payloadLen)\n 500→\t}\n 501→\n 502→\tpayload := make([]byte, payloadLen)\n 503→\tif _, err := io.ReadFull(r, payload); err != nil {\n 504→\t\treturn nil, fmt.Errorf(\"read payload: %w\", err)\n 505→\t}\n 506→\n 507→\tvar storedCRC uint32\n 508→\tif err := binary.Read(r, binary.LittleEndian, &storedCRC); err != nil {\n 509→\t\treturn nil, fmt.Errorf(\"read CRC: %w\", err)\n 510→\t}\n 511→\n 512→\tif crc32.ChecksumIEEE(payload) != storedCRC {\n 513→\t\treturn nil, fmt.Errorf(\"CRC mismatch (truncated write or corruption)\")\n 514→\t}\n 515→\n 516→\treturn parseWALPayload(payload)\n 517→}\n 518→\n 519→// parseWALPayload decodes a binary payload into a WALMessage.\n 520→func parseWALPayload(payload []byte) (*WALMessage, error) {\n 521→\tif len(payload) < 8+2+1+4 {\n 522→\t\treturn nil, fmt.Errorf(\"payload too short: %d bytes\", len(payload))\n 523→\t}\n 524→\n 525→\toffset := 0\n 526→\n 527→\t// Timestamp (8 bytes)\n 528→\tts := int64(binary.LittleEndian.Uint64(payload[offset : offset+8]))\n 529→\toffset += 8\n 530→\n 531→\t// Metric name (2-byte length + bytes)\n 532→\tif offset+2 > len(payload) {\n 533→\t\treturn nil, fmt.Errorf(\"metric name length overflows payload\")\n 534→\t}\n 535→\tmLen := int(binary.LittleEndian.Uint16(payload[offset : offset+2]))\n 536→\toffset += 2\n 537→\n 538→\tif offset+mLen > len(payload) {\n 539→\t\treturn nil, fmt.Errorf(\"metric name overflows payload\")\n 540→\t}\n 541→\tmetricName := string(payload[offset : offset+mLen])\n 542→\toffset += mLen\n 543→\n 544→\t// Selector count (1 byte)\n 545→\tif offset >= len(payload) {\n 546→\t\treturn nil, fmt.Errorf(\"selector count overflows payload\")\n 547→\t}\n 548→\tselCount := int(payload[offset])\n 549→\toffset++\n 550→\n 551→\tselectors := make([]string, selCount)\n 552→\tfor i := range selCount {\n 553→\t\tif offset >= len(payload) {\n 554→\t\t\treturn nil, fmt.Errorf(\"selector[%d] length overflows payload\", i)\n 555→\t\t}\n 556→\t\tsLen := int(payload[offset])\n 557→\t\toffset++\n 558→\n 559→\t\tif offset+sLen > len(payload) {\n 560→\t\t\treturn nil, fmt.Errorf(\"selector[%d] data overflows payload\", i)\n 561→\t\t}\n 562→\t\tselectors[i] = string(payload[offset : offset+sLen])\n 563→\t\toffset += sLen\n 564→\t}\n 565→\n 566→\t// Value (4 bytes, float32 bits)\n 567→\tif offset+4 > len(payload) {\n 568→\t\treturn nil, fmt.Errorf(\"value overflows payload\")\n 569→\t}\n 570→\tbits := binary.LittleEndian.Uint32(payload[offset : offset+4])\n 571→\tvalue := schema.Float(math.Float32frombits(bits))\n 572→\n 573→\treturn &WALMessage{\n 574→\t\tMetricName: metricName,\n 575→\t\tTimestamp: ts,\n 576→\t\tSelector: selectors,\n 577→\t\tValue: value,\n 578→\t}, nil\n 579→}\n 580→\n 581→// loadWALFile reads a WAL file and replays all valid records into the Level tree.\n 582→// l is the host-level node. Corrupt or partial trailing records are silently skipped\n 583→// (expected on crash). Records older than 'from' are skipped.\n 584→func (l *Level) loadWALFile(m *MemoryStore, f *os.File, from int64) error {\n 585→\tbr := bufio.NewReader(f)\n 586→\n 587→\t// Verify file header magic.\n 588→\tvar fileMagic uint32\n 589→\tif err := binary.Read(br, binary.LittleEndian, &fileMagic); err != nil {\n 590→\t\tif err == io.EOF {\n 591→\t\t\treturn nil // Empty file, no data\n 592→\t\t}\n 593→\t\treturn fmt.Errorf(\"[METRICSTORE]> WAL: read file header: %w\", err)\n 594→\t}\n 595→\n 596→\tif fileMagic != walFileMagic {\n 597→\t\treturn fmt.Errorf(\"[METRICSTORE]> WAL: invalid file magic 0x%08X (expected 0x%08X)\", fileMagic, walFileMagic)\n 598→\t}\n 599→\n 600→\t// Cache level lookups to avoid repeated tree traversal.\n 601→\tlvlCache := make(map[string]*Level)\n 602→\n 603→\tfor {\n 604→\t\tmsg, err := readWALRecord(br)\n 605→\t\tif err != nil {\n 606→\t\t\t// Truncated trailing record is expected after a crash; stop replaying.\n 607→\t\t\tcclog.Debugf(\"[METRICSTORE]> WAL: stopping replay at corrupted/partial record: %v\", err)\n 608→\t\t\tbreak\n 609→\t\t}\n 610→\t\tif msg == nil {\n 611→\t\t\tbreak // Clean EOF\n 612→\t\t}\n 613→\n 614→\t\tif msg.Timestamp < from {\n 615→\t\t\tcontinue // Older than retention window\n 616→\t\t}\n 617→\n 618→\t\tminfo, ok := m.Metrics[msg.MetricName]\n 619→\t\tif !ok {\n 620→\t\t\tcontinue // Unknown metric (config may have changed)\n 621→\t\t}\n 622→\n 623→\t\t// Cache key is the null-separated selector path.\n 624→\t\tcacheKey := joinSelector(msg.Selector)\n 625→\t\tlvl, ok := lvlCache[cacheKey]\n 626→\t\tif !ok {\n 627→\t\t\tlvl = l.findLevelOrCreate(msg.Selector, len(m.Metrics))\n 628→\t\t\tlvlCache[cacheKey] = lvl\n 629→\t\t}\n 630→\n 631→\t\t// Write directly to the buffer, same as WriteToLevel but without the\n 632→\t\t// global level lookup (we already have the right level).\n 633→\t\tlvl.lock.Lock()\n 634→\t\tb := lvl.metrics[minfo.offset]\n 635→\t\tif b == nil {\n 636→\t\t\tb = newBuffer(msg.Timestamp, minfo.Frequency)\n 637→\t\t\tlvl.metrics[minfo.offset] = b\n 638→\t\t}\n 639→\t\tnb, writeErr := b.write(msg.Timestamp, msg.Value)\n 640→\t\tif writeErr == nil && b != nb {\n 641→\t\t\tlvl.metrics[minfo.offset] = nb\n 642→\t\t}\n 643→\t\t// Ignore write errors for timestamps before buffer start (can happen when\n 644→\t\t// replaying WAL entries that predate a loaded snapshot's start time).\n 645→\t\tlvl.lock.Unlock()\n 646→\t}\n 647→\n 648→\treturn nil\n 649→}\n 650→\n 651→// joinSelector builds a cache key from a selector slice using null bytes as separators.\n 652→func joinSelector(sel []string) string {\n 653→\tif len(sel) == 0 {\n 654→\t\treturn \"\"\n 655→\t}\n 656→\tvar result strings.Builder\n 657→\tresult.WriteString(sel[0])\n 658→\tfor i := 1; i < len(sel); i++ {\n 659→\t\tresult.WriteString(\"\\x00\" + sel[i])\n 660→\t}\n 661→\treturn result.String()\n 662→}\n 663→\n 664→// ToCheckpointWAL writes binary snapshot files for all hosts in parallel.\n 665→// Returns the number of files written, the list of host directories that were\n 666→// successfully checkpointed (for WAL rotation), and any errors.\n 667→func (m *MemoryStore) ToCheckpointWAL(dir string, from, to int64) (int, []string, error) {\n 668→\t// Collect all cluster/host pairs.\n 669→\tm.root.lock.RLock()\n 670→\ttotalHosts := 0\n 671→\tfor _, l1 := range m.root.children {\n 672→\t\tl1.lock.RLock()\n 673→\t\ttotalHosts += len(l1.children)\n 674→\t\tl1.lock.RUnlock()\n 675→\t}\n 676→\tm.root.lock.RUnlock()\n 677→\n 678→\tlevels := make([]*Level, 0, totalHosts)\n 679→\tselectors := make([][]string, 0, totalHosts)\n 680→\n 681→\tm.root.lock.RLock()\n 682→\tfor sel1, l1 := range m.root.children {\n 683→\t\tl1.lock.RLock()\n 684→\t\tfor sel2, l2 := range l1.children {\n 685→\t\t\tlevels = append(levels, l2)\n 686→\t\t\tselectors = append(selectors, []string{sel1, sel2})\n 687→\t\t}\n 688→\t\tl1.lock.RUnlock()\n 689→\t}\n 690→\tm.root.lock.RUnlock()\n 691→\n 692→\ttype workItem struct {\n 693→\t\tlevel *Level\n 694→\t\thostDir string\n 695→\t\tselector []string\n 696→\t}\n 697→\n 698→\ttotalWork := len(levels)\n 699→\tcclog.Infof(\"[METRICSTORE]> Starting binary checkpoint for %d hosts with %d workers\", totalWork, Keys.NumWorkers)\n 700→\n 701→\tn, errs, completed := int32(0), int32(0), int32(0)\n 702→\tvar successDirs []string\n 703→\tvar successMu sync.Mutex\n 704→\n 705→\tvar wg sync.WaitGroup\n 706→\twg.Add(Keys.NumWorkers)\n 707→\twork := make(chan workItem, Keys.NumWorkers*2)\n 708→\n 709→\t// Progress logging goroutine.\n 710→\tstopProgress := make(chan struct{})\n 711→\tgo func() {\n 712→\t\tticker := time.NewTicker(10 * time.Second)\n 713→\t\tdefer ticker.Stop()\n 714→\t\tfor {\n 715→\t\t\tselect {\n 716→\t\t\tcase <-ticker.C:\n 717→\t\t\t\tcclog.Infof(\"[METRICSTORE]> Checkpoint progress: %d/%d hosts (%d written, %d errors)\",\n 718→\t\t\t\t\tatomic.LoadInt32(&completed), totalWork, atomic.LoadInt32(&n), atomic.LoadInt32(&errs))\n 719→\t\t\tcase <-stopProgress:\n 720→\t\t\t\treturn\n 721→\t\t\t}\n 722→\t\t}\n 723→\t}()\n 724→\n 725→\tfor range Keys.NumWorkers {\n 726→\t\tgo func() {\n 727→\t\t\tdefer wg.Done()\n 728→\t\t\tfor wi := range work {\n 729→\t\t\t\terr := wi.level.toCheckpointBinary(wi.hostDir, from, to, m)\n 730→\t\t\t\tif err != nil {\n 731→\t\t\t\t\tif err == ErrNoNewArchiveData {\n 732→\t\t\t\t\t\tatomic.AddInt32(&completed, 1)\n 733→\t\t\t\t\t\tcontinue\n 734→\t\t\t\t\t}\n 735→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> binary checkpoint error for %s: %v\", wi.hostDir, err)\n 736→\t\t\t\t\tatomic.AddInt32(&errs, 1)\n 737→\t\t\t\t} else {\n 738→\t\t\t\t\tatomic.AddInt32(&n, 1)\n 739→\t\t\t\t\tsuccessMu.Lock()\n 740→\t\t\t\t\tsuccessDirs = append(successDirs, wi.hostDir)\n 741→\t\t\t\t\tsuccessMu.Unlock()\n 742→\t\t\t\t}\n 743→\t\t\t\tatomic.AddInt32(&completed, 1)\n 744→\t\t\t}\n 745→\t\t}()\n 746→\t}\n 747→\n 748→\tfor i := range levels {\n 749→\t\thostDir := path.Join(dir, path.Join(selectors[i]...))\n 750→\t\twork <- workItem{\n 751→\t\t\tlevel: levels[i],\n 752→\t\t\thostDir: hostDir,\n 753→\t\t\tselector: selectors[i],\n 754→\t\t}\n 755→\t}\n 756→\tclose(work)\n 757→\twg.Wait()\n 758→\tclose(stopProgress)\n 759→\n 760→\tif errs > 0 {\n 761→\t\treturn int(n), successDirs, fmt.Errorf(\"[METRICSTORE]> %d errors during binary checkpoint (%d successes)\", errs, n)\n 762→\t}\n 763→\treturn int(n), successDirs, nil\n 764→}\n 765→\n 766→// toCheckpointBinary writes a binary snapshot file for a single host-level node.\n 767→// Uses atomic rename (write to .tmp then rename) to avoid partial reads on crash.\n 768→func (l *Level) toCheckpointBinary(dir string, from, to int64, m *MemoryStore) error {\n 769→\tcf, err := l.toCheckpointFile(from, to, m)\n 770→\tif err != nil {\n 771→\t\treturn err\n 772→\t}\n 773→\tif cf == nil {\n 774→\t\treturn ErrNoNewArchiveData\n 775→\t}\n 776→\n 777→\tif err := os.MkdirAll(dir, CheckpointDirPerms); err != nil {\n 778→\t\treturn fmt.Errorf(\"mkdir %s: %w\", dir, err)\n 779→\t}\n 780→\n 781→\t// Write to a temp file first, then rename (atomic on POSIX).\n 782→\ttmpPath := path.Join(dir, fmt.Sprintf(\"%d.bin.tmp\", from))\n 783→\tfinalPath := path.Join(dir, fmt.Sprintf(\"%d.bin\", from))\n 784→\n 785→\tf, err := os.OpenFile(tmpPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n 786→\tif err != nil {\n 787→\t\treturn fmt.Errorf(\"open binary snapshot %s: %w\", tmpPath, err)\n 788→\t}\n 789→\n 790→\tbw := bufio.NewWriter(f)\n 791→\tif err := writeBinarySnapshotFile(bw, cf); err != nil {\n 792→\t\tf.Close()\n 793→\t\tos.Remove(tmpPath)\n 794→\t\treturn fmt.Errorf(\"write binary snapshot: %w\", err)\n 795→\t}\n 796→\tif err := bw.Flush(); err != nil {\n 797→\t\tf.Close()\n 798→\t\tos.Remove(tmpPath)\n 799→\t\treturn err\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"ccac5daa-b7bb-461d-951e-96fb1a4d85ad","timestamp":"2026-04-01T13:17:46.827Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"b9187308-bb73-4be5-8d9d-b61cd5a2c0e6","timestamp":"2026-04-01T13:17:46.835Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"b9b4ef03-8c9f-457f-b331-53ea5043da03","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01EM4drophNjGrT2p8hetqUx","type":"tool_result","content":" 800→\t}\n 801→\tf.Close()\n 802→\n 803→\treturn os.Rename(tmpPath, finalPath)\n 804→}\n 805→\n 806→// writeBinarySnapshotFile writes the binary snapshot file header and level tree.\n 807→func writeBinarySnapshotFile(w io.Writer, cf *CheckpointFile) error {\n 808→\tif err := binary.Write(w, binary.LittleEndian, snapFileMagic); err != nil {\n 809→\t\treturn err\n 810→\t}\n 811→\tif err := binary.Write(w, binary.LittleEndian, cf.From); err != nil {\n 812→\t\treturn err\n 813→\t}\n 814→\tif err := binary.Write(w, binary.LittleEndian, cf.To); err != nil {\n 815→\t\treturn err\n 816→\t}\n 817→\treturn writeBinaryLevel(w, cf)\n 818→}\n 819→\n 820→// writeBinaryLevel recursively writes a CheckpointFile level in binary format.\n 821→func writeBinaryLevel(w io.Writer, cf *CheckpointFile) error {\n 822→\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Metrics))); err != nil {\n 823→\t\treturn err\n 824→\t}\n 825→\n 826→\tfor name, metric := range cf.Metrics {\n 827→\t\tif err := writeString16(w, name); err != nil {\n 828→\t\t\treturn err\n 829→\t\t}\n 830→\t\tif err := binary.Write(w, binary.LittleEndian, metric.Frequency); err != nil {\n 831→\t\t\treturn err\n 832→\t\t}\n 833→\t\tif err := binary.Write(w, binary.LittleEndian, metric.Start); err != nil {\n 834→\t\t\treturn err\n 835→\t\t}\n 836→\t\tif err := binary.Write(w, binary.LittleEndian, uint32(len(metric.Data))); err != nil {\n 837→\t\t\treturn err\n 838→\t\t}\n 839→\t\tfor _, v := range metric.Data {\n 840→\t\t\tif err := binary.Write(w, binary.LittleEndian, math.Float32bits(float32(v))); err != nil {\n 841→\t\t\t\treturn err\n 842→\t\t\t}\n 843→\t\t}\n 844→\t}\n 845→\n 846→\tif err := binary.Write(w, binary.LittleEndian, uint32(len(cf.Children))); err != nil {\n 847→\t\treturn err\n 848→\t}\n 849→\n 850→\tfor name, child := range cf.Children {\n 851→\t\tif err := writeString16(w, name); err != nil {\n 852→\t\t\treturn err\n 853→\t\t}\n 854→\t\tif err := writeBinaryLevel(w, child); err != nil {\n 855→\t\t\treturn err\n 856→\t\t}\n 857→\t}\n 858→\n 859→\treturn nil\n 860→}\n 861→\n 862→// writeString16 writes a 2-byte length-prefixed string to w.\n 863→func writeString16(w io.Writer, s string) error {\n 864→\tif err := binary.Write(w, binary.LittleEndian, uint16(len(s))); err != nil {\n 865→\t\treturn err\n 866→\t}\n 867→\t_, err := io.WriteString(w, s)\n 868→\treturn err\n 869→}\n 870→\n 871→// loadBinaryFile reads a binary snapshot file and loads data into the Level tree.\n 872→// The retention check (from) is applied to the file's 'to' timestamp.\n 873→func (l *Level) loadBinaryFile(m *MemoryStore, f *os.File, from int64) error {\n 874→\tbr := bufio.NewReader(f)\n 875→\n 876→\tvar magic uint32\n 877→\tif err := binary.Read(br, binary.LittleEndian, &magic); err != nil {\n 878→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read magic: %w\", err)\n 879→\t}\n 880→\tif magic != snapFileMagic {\n 881→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: invalid magic 0x%08X (expected 0x%08X)\", magic, snapFileMagic)\n 882→\t}\n 883→\n 884→\tvar fileFrom, fileTo int64\n 885→\tif err := binary.Read(br, binary.LittleEndian, &fileFrom); err != nil {\n 886→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read from: %w\", err)\n 887→\t}\n 888→\tif err := binary.Read(br, binary.LittleEndian, &fileTo); err != nil {\n 889→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read to: %w\", err)\n 890→\t}\n 891→\n 892→\tif fileTo != 0 && fileTo < from {\n 893→\t\treturn nil // File is older than retention window, skip it\n 894→\t}\n 895→\n 896→\tcf, err := readBinaryLevel(br)\n 897→\tif err != nil {\n 898→\t\treturn fmt.Errorf(\"[METRICSTORE]> binary snapshot: read level tree: %w\", err)\n 899→\t}\n 900→\tcf.From = fileFrom\n 901→\tcf.To = fileTo\n 902→\n 903→\treturn l.loadFile(cf, m)\n 904→}\n 905→\n 906→// readBinaryLevel recursively reads a level from the binary snapshot format.\n 907→func readBinaryLevel(r io.Reader) (*CheckpointFile, error) {\n 908→\tcf := &CheckpointFile{\n 909→\t\tMetrics: make(map[string]*CheckpointMetrics),\n 910→\t\tChildren: make(map[string]*CheckpointFile),\n 911→\t}\n 912→\n 913→\tvar numMetrics uint32\n 914→\tif err := binary.Read(r, binary.LittleEndian, &numMetrics); err != nil {\n 915→\t\treturn nil, fmt.Errorf(\"read num_metrics: %w\", err)\n 916→\t}\n 917→\n 918→\tfor range numMetrics {\n 919→\t\tname, err := readString16(r)\n 920→\t\tif err != nil {\n 921→\t\t\treturn nil, fmt.Errorf(\"read metric name: %w\", err)\n 922→\t\t}\n 923→\n 924→\t\tvar freq, start int64\n 925→\t\tif err := binary.Read(r, binary.LittleEndian, &freq); err != nil {\n 926→\t\t\treturn nil, fmt.Errorf(\"read frequency for %s: %w\", name, err)\n 927→\t\t}\n 928→\t\tif err := binary.Read(r, binary.LittleEndian, &start); err != nil {\n 929→\t\t\treturn nil, fmt.Errorf(\"read start for %s: %w\", name, err)\n 930→\t\t}\n 931→\n 932→\t\tvar numValues uint32\n 933→\t\tif err := binary.Read(r, binary.LittleEndian, &numValues); err != nil {\n 934→\t\t\treturn nil, fmt.Errorf(\"read num_values for %s: %w\", name, err)\n 935→\t\t}\n 936→\n 937→\t\tdata := make([]schema.Float, numValues)\n 938→\t\tfor i := range numValues {\n 939→\t\t\tvar bits uint32\n 940→\t\t\tif err := binary.Read(r, binary.LittleEndian, &bits); err != nil {\n 941→\t\t\t\treturn nil, fmt.Errorf(\"read value[%d] for %s: %w\", i, name, err)\n 942→\t\t\t}\n 943→\t\t\tdata[i] = schema.Float(math.Float32frombits(bits))\n 944→\t\t}\n 945→\n 946→\t\tcf.Metrics[name] = &CheckpointMetrics{\n 947→\t\t\tFrequency: freq,\n 948→\t\t\tStart: start,\n 949→\t\t\tData: data,\n 950→\t\t}\n 951→\t}\n 952→\n 953→\tvar numChildren uint32\n 954→\tif err := binary.Read(r, binary.LittleEndian, &numChildren); err != nil {\n 955→\t\treturn nil, fmt.Errorf(\"read num_children: %w\", err)\n 956→\t}\n 957→\n 958→\tfor range numChildren {\n 959→\t\tchildName, err := readString16(r)\n 960→\t\tif err != nil {\n 961→\t\t\treturn nil, fmt.Errorf(\"read child name: %w\", err)\n 962→\t\t}\n 963→\n 964→\t\tchild, err := readBinaryLevel(r)\n 965→\t\tif err != nil {\n 966→\t\t\treturn nil, fmt.Errorf(\"read child %s: %w\", childName, err)\n 967→\t\t}\n 968→\t\tcf.Children[childName] = child\n 969→\t}\n 970→\n 971→\treturn cf, nil\n 972→}\n 973→\n 974→// readString16 reads a 2-byte length-prefixed string from r.\n 975→func readString16(r io.Reader) (string, error) {\n 976→\tvar sLen uint16\n 977→\tif err := binary.Read(r, binary.LittleEndian, &sLen); err != nil {\n 978→\t\treturn \"\", err\n 979→\t}\n 980→\tbuf := make([]byte, sLen)\n 981→\tif _, err := io.ReadFull(r, buf); err != nil {\n 982→\t\treturn \"\", err\n 983→\t}\n 984→\treturn string(buf), nil\n 985→}\n 986→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"cdd74ed0-d217-44ce-8d3c-b72086c3ee6c","timestamp":"2026-04-01T13:17:47.272Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"ea4dac08-5bce-4fb7-8b44-a3f346c6de40","timestamp":"2026-04-01T13:17:47.310Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"ea4dac08-5bce-4fb7-8b44-a3f346c6de40","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:17:49.250Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_014KQ7dnuoLbAeSFK4PsTe2J","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_019ncSdCjYGRQDQ1Egy87WND","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/api.go","limit":200},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":14113,"cache_read_input_tokens":57893,"cache_creation":{"ephemeral_5m_input_tokens":14113,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7h55KmcfnYdoknqqJt","uuid":"09c30f07-5a43-4169-84e1-c8cfee00f719"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"1bf9ecec-8974-4fb9-bee4-50b72697f610","timestamp":"2026-04-01T13:17:49.251Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"1bf9ecec-8974-4fb9-bee4-50b72697f610","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019ncSdCjYGRQDQ1Egy87WND","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// This file contains the API types and data fetching logic for querying metric data\n 7→// from the in-memory metric store. It provides structures for building complex queries\n 8→// with support for aggregation, scaling, padding, and statistics computation.\n 9→package metricstore\n 10→\n 11→import (\n 12→\t\"errors\"\n 13→\t\"fmt\"\n 14→\t\"math\"\n 15→\n 16→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 17→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 18→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 19→)\n 20→\n 21→var (\n 22→\t// ErrNoHostOrMetric is returned when the metric store does not find the host or the metric\n 23→\tErrNoHostOrMetric error = errors.New(\"[METRICSTORE]> metric or host not found\")\n 24→\t// ErrInvalidTimeRange is returned when a query has 'from' >= 'to'\n 25→\tErrInvalidTimeRange = errors.New(\"[METRICSTORE]> invalid time range: 'from' must be before 'to'\")\n 26→\t// ErrEmptyCluster is returned when a query with ForAllNodes has no cluster specified\n 27→\tErrEmptyCluster = errors.New(\"[METRICSTORE]> cluster name cannot be empty\")\n 28→)\n 29→\n 30→// APIMetricData represents the response data for a single metric query.\n 31→//\n 32→// It contains both the time-series data points and computed statistics (avg, min, max).\n 33→// If an error occurred during data retrieval, the Error field will be set and other\n 34→// fields may be incomplete.\n 35→type APIMetricData struct {\n 36→\tError *string `json:\"error,omitempty\"`\n 37→\tData schema.FloatArray `json:\"data,omitempty\"`\n 38→\tFrom int64 `json:\"from\"`\n 39→\tTo int64 `json:\"to\"`\n 40→\tResolution int64 `json:\"resolution\"`\n 41→\tAvg schema.Float `json:\"avg\"`\n 42→\tMin schema.Float `json:\"min\"`\n 43→\tMax schema.Float `json:\"max\"`\n 44→}\n 45→\n 46→// APIQueryRequest represents a batch query request for metric data.\n 47→//\n 48→// It supports two modes of operation:\n 49→// 1. Explicit queries via the Queries field\n 50→// 2. Automatic query generation via ForAllNodes (queries all specified metrics for all nodes in the cluster)\n 51→//\n 52→// The request can be customized with flags to include/exclude statistics, raw data, and padding.\n 53→type APIQueryRequest struct {\n 54→\tCluster string `json:\"cluster\"`\n 55→\tQueries []APIQuery `json:\"queries\"`\n 56→\tForAllNodes []string `json:\"for-all-nodes\"`\n 57→\tFrom int64 `json:\"from\"`\n 58→\tTo int64 `json:\"to\"`\n 59→\tWithStats bool `json:\"with-stats\"`\n 60→\tWithData bool `json:\"with-data\"`\n 61→\tWithPadding bool `json:\"with-padding\"`\n 62→}\n 63→\n 64→// APIQueryResponse represents the response to an APIQueryRequest.\n 65→//\n 66→// Results is a 2D array where each outer element corresponds to a query,\n 67→// and each inner element corresponds to a selector within that query\n 68→// (e.g., multiple CPUs or cores).\n 69→type APIQueryResponse struct {\n 70→\tQueries []APIQuery `json:\"queries,omitempty\"`\n 71→\tResults [][]APIMetricData `json:\"results\"`\n 72→}\n 73→\n 74→// APIQuery represents a single metric query with optional hierarchical selectors.\n 75→//\n 76→// The hierarchical selection works as follows:\n 77→// - Hostname: The node to query\n 78→// - Type + TypeIds: First level of hierarchy (e.g., \"cpu\" + [\"0\", \"1\", \"2\"])\n 79→// - SubType + SubTypeIds: Second level of hierarchy (e.g., \"core\" + [\"0\", \"1\"])\n 80→//\n 81→// If Aggregate is true, data from multiple type/subtype IDs will be aggregated according\n 82→// to the metric's aggregation strategy. Otherwise, separate results are returned for each combination.\n 83→type APIQuery struct {\n 84→\tType *string `json:\"type,omitempty\"`\n 85→\tSubType *string `json:\"subtype,omitempty\"`\n 86→\tMetric string `json:\"metric\"`\n 87→\tHostname string `json:\"host\"`\n 88→\tResolution int64 `json:\"resolution\"`\n 89→\tTypeIds []string `json:\"type-ids,omitempty\"`\n 90→\tSubTypeIds []string `json:\"subtype-ids,omitempty\"`\n 91→\tScaleFactor schema.Float `json:\"scale-by,omitempty\"`\n 92→\tAggregate bool `json:\"aggreg\"`\n 93→}\n 94→\n 95→// AddStats computes and populates the Avg, Min, and Max fields from the Data array.\n 96→//\n 97→// NaN values in the data are ignored during computation. If all values are NaN,\n 98→// the statistics fields will be set to NaN.\n 99→//\n 100→// TODO: Optimize this, just like the stats endpoint!\n 101→func (data *APIMetricData) AddStats() {\n 102→\tn := 0\n 103→\tsum, min, max := 0.0, math.MaxFloat64, -math.MaxFloat64\n 104→\tfor _, x := range data.Data {\n 105→\t\tif x.IsNaN() {\n 106→\t\t\tcontinue\n 107→\t\t}\n 108→\n 109→\t\tn += 1\n 110→\t\tsum += float64(x)\n 111→\t\tmin = math.Min(min, float64(x))\n 112→\t\tmax = math.Max(max, float64(x))\n 113→\t}\n 114→\n 115→\tif n > 0 {\n 116→\t\tavg := sum / float64(n)\n 117→\t\tdata.Avg = schema.Float(avg)\n 118→\t\tdata.Min = schema.Float(min)\n 119→\t\tdata.Max = schema.Float(max)\n 120→\t} else {\n 121→\t\tdata.Avg, data.Min, data.Max = schema.NaN, schema.NaN, schema.NaN\n 122→\t}\n 123→}\n 124→\n 125→// ScaleBy multiplies all data points and statistics by the given factor.\n 126→//\n 127→// This is commonly used for unit conversion (e.g., bytes to gigabytes).\n 128→// Scaling by 0 or 1 is a no-op for performance reasons.\n 129→func (data *APIMetricData) ScaleBy(f schema.Float) {\n 130→\tif f == 1 {\n 131→\t\treturn\n 132→\t}\n 133→\n 134→\tdata.Avg *= f\n 135→\tdata.Min *= f\n 136→\tdata.Max *= f\n 137→\tfor i := 0; i < len(data.Data); i++ {\n 138→\t\tdata.Data[i] *= f\n 139→\t}\n 140→}\n 141→\n 142→// PadDataWithNull pads the beginning of the data array with NaN values if needed.\n 143→//\n 144→// This ensures that the data aligns with the requested 'from' timestamp, even if\n 145→// the metric store doesn't have data for the earliest time points. This is useful\n 146→// for maintaining consistent array indexing across multiple queries.\n 147→//\n 148→// Parameters:\n 149→// - ms: MemoryStore instance to lookup metric configuration\n 150→// - from: The requested start timestamp\n 151→// - to: The requested end timestamp (unused but kept for API consistency)\n 152→// - metric: The metric name to lookup frequency information\n 153→func (data *APIMetricData) PadDataWithNull(ms *MemoryStore, from, to int64, metric string) {\n 154→\tminfo, ok := ms.Metrics[metric]\n 155→\tif !ok {\n 156→\t\treturn\n 157→\t}\n 158→\n 159→\tif (data.From / minfo.Frequency) > (from / minfo.Frequency) {\n 160→\t\tpadfront := int((data.From / minfo.Frequency) - (from / minfo.Frequency))\n 161→\t\tndata := make([]schema.Float, 0, padfront+len(data.Data))\n 162→\t\tfor range padfront {\n 163→\t\t\tndata = append(ndata, schema.NaN)\n 164→\t\t}\n 165→\t\tfor j := 0; j < len(data.Data); j++ {\n 166→\t\t\tndata = append(ndata, data.Data[j])\n 167→\t\t}\n 168→\t\tdata.Data = ndata\n 169→\t}\n 170→}\n 171→\n 172→// FetchData executes a batch metric query request and returns the results.\n 173→//\n 174→// This is the primary API for retrieving metric data from the memory store. It supports:\n 175→// - Individual queries via req.Queries\n 176→// - Batch queries for all nodes via req.ForAllNodes\n 177→// - Hierarchical selector construction (cluster → host → type → subtype)\n 178→// - Optional statistics computation (avg, min, max)\n 179→// - Optional data scaling\n 180→// - Optional data padding with NaN values\n 181→//\n 182→// The function constructs selectors based on the query parameters and calls MemoryStore.Read()\n 183→// for each selector. If a query specifies Aggregate=false with multiple type/subtype IDs,\n 184→// separate results are returned for each combination.\n 185→//\n 186→// Parameters:\n 187→// - req: The query request containing queries, time range, and options\n 188→//\n 189→// Returns:\n 190→// - APIQueryResponse containing results for each query, or error if validation fails\n 191→//\n 192→// Errors:\n 193→// - ErrInvalidTimeRange if req.From > req.To\n 194→// - ErrEmptyCluster if req.ForAllNodes is used without specifying a cluster\n 195→// - Error if MemoryStore is not initialized\n 196→// - Individual query errors are stored in APIMetricData.Error field\n 197→func FetchData(req APIQueryRequest) (*APIQueryResponse, error) {\n 198→\tif req.From > req.To {\n 199→\t\treturn nil, ErrInvalidTimeRange\n 200→\t}\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"df254cd9-42e7-4ab7-b2fd-bd6ab0d33569","timestamp":"2026-04-01T13:17:49.264Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"02125548-4df5-4200-97ed-a45eb7a8cdf0","timestamp":"2026-04-01T13:17:49.295Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"02125548-4df5-4200-97ed-a45eb7a8cdf0","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:17:49.453Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_014KQ7dnuoLbAeSFK4PsTe2J","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_019ghDxJcp3eTzdwgJdYrf1H","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/lineprotocol.go","limit":200},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":6,"cache_creation_input_tokens":14113,"cache_read_input_tokens":57893,"cache_creation":{"ephemeral_5m_input_tokens":14113,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd7h55KmcfnYdoknqqJt","uuid":"552c36da-2968-4b5f-82f5-dfa93dd4cfcd"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"11ed4a52-6d13-4b25-9483-6cef2fc1a7bf","timestamp":"2026-04-01T13:17:49.454Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"11ed4a52-6d13-4b25-9483-6cef2fc1a7bf","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019ghDxJcp3eTzdwgJdYrf1H","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// This file implements ingestion of InfluxDB line-protocol metric data received\n 7→// over NATS. Each line encodes one metric sample with the following structure:\n 8→//\n 9→//\t<measurement>[,cluster=<c>][,hostname=<h>][,type=<t>][,type-id=<id>][,subtype=<s>][,stype-id=<id>] value=<v> [<timestamp>]\n 10→//\n 11→// The measurement name identifies the metric (e.g. \"cpu_load\"). Tags provide\n 12→// routing information (cluster, host) and optional sub-device selectors (type,\n 13→// subtype). Only one field is expected per line: \"value\".\n 14→//\n 15→// After decoding, each sample is:\n 16→// 1. Written to the in-memory store via ms.WriteToLevel.\n 17→// 2. If the checkpoint format is \"wal\", also forwarded to the WAL staging\n 18→// goroutine via the WALMessages channel for durable write-ahead logging.\n 19→package metricstore\n 20→\n 21→import (\n 22→\t\"bytes\"\n 23→\t\"context\"\n 24→\t\"fmt\"\n 25→\t\"sync\"\n 26→\t\"sync/atomic\"\n 27→\t\"time\"\n 28→\n 29→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 30→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 31→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 32→\t\"github.com/ClusterCockpit/cc-line-protocol/v2/lineprotocol\"\n 33→)\n 34→\n 35→// ReceiveNats subscribes to all configured NATS subjects and feeds incoming\n 36→// line-protocol messages into the MemoryStore.\n 37→//\n 38→// When workers > 1 a pool of goroutines drains a shared channel so that\n 39→// multiple messages can be decoded in parallel. With workers == 1 the NATS\n 40→// callback decodes inline (no channel overhead, lower latency).\n 41→//\n 42→// The function blocks until ctx is cancelled and all worker goroutines have\n 43→// finished. It returns nil when the NATS client is not configured; callers\n 44→// should treat that as a no-op rather than an error.\n 45→func ReceiveNats(ms *MemoryStore,\n 46→\tworkers int,\n 47→\tctx context.Context,\n 48→) error {\n 49→\tnc := nats.GetClient()\n 50→\n 51→\tif nc == nil {\n 52→\t\tcclog.Warn(\"NATS client not initialized\")\n 53→\t\treturn nil\n 54→\t}\n 55→\n 56→\tvar wg sync.WaitGroup\n 57→\tmsgs := make(chan []byte, max(workers*256, 8192))\n 58→\n 59→\tfor _, sc := range *Keys.Subscriptions {\n 60→\t\tclusterTag := sc.ClusterTag\n 61→\t\tif workers > 1 {\n 62→\t\t\twg.Add(workers)\n 63→\n 64→\t\t\tfor range workers {\n 65→\t\t\t\tgo func() {\n 66→\t\t\t\t\tdefer wg.Done()\n 67→\t\t\t\t\tfor m := range msgs {\n 68→\t\t\t\t\t\tdec := lineprotocol.NewDecoderWithBytes(m)\n 69→\t\t\t\t\t\tif err := DecodeLine(dec, ms, clusterTag); err != nil {\n 70→\t\t\t\t\t\t\tcclog.Errorf(\"error: %s\", err.Error())\n 71→\t\t\t\t\t\t}\n 72→\t\t\t\t\t}\n 73→\t\t\t\t}()\n 74→\t\t\t}\n 75→\n 76→\t\t\tnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n 77→\t\t\t\tselect {\n 78→\t\t\t\tcase msgs <- data:\n 79→\t\t\t\tcase <-ctx.Done():\n 80→\t\t\t\t}\n 81→\t\t\t})\n 82→\t\t} else {\n 83→\t\t\tnc.Subscribe(sc.SubscribeTo, func(subject string, data []byte) {\n 84→\t\t\t\tdec := lineprotocol.NewDecoderWithBytes(data)\n 85→\t\t\t\tif err := DecodeLine(dec, ms, clusterTag); err != nil {\n 86→\t\t\t\t\tcclog.Errorf(\"error: %s\", err.Error())\n 87→\t\t\t\t}\n 88→\t\t\t})\n 89→\t\t}\n 90→\t\tcclog.Infof(\"NATS subscription to '%s' established\", sc.SubscribeTo)\n 91→\t}\n 92→\n 93→\tgo func() {\n 94→\t\t<-ctx.Done()\n 95→\t\tclose(msgs)\n 96→\t}()\n 97→\n 98→\twg.Wait()\n 99→\n 100→\treturn nil\n 101→}\n 102→\n 103→// reorder prepends prefix to buf in-place when buf has enough spare capacity,\n 104→// avoiding an allocation. Falls back to a regular append otherwise.\n 105→//\n 106→// It is used to assemble the \"type<type-id>\" and \"subtype<stype-id>\" selector\n 107→// strings when the type tag arrives before the type-id tag in the line, so the\n 108→// two byte slices need to be concatenated in tag-declaration order regardless\n 109→// of wire order.\n 110→func reorder(buf, prefix []byte) []byte {\n 111→\tn := len(prefix)\n 112→\tm := len(buf)\n 113→\tif cap(buf) < m+n {\n 114→\t\treturn append(prefix[:n:n], buf...)\n 115→\t} else {\n 116→\t\tbuf = buf[:n+m]\n 117→\t\tfor i := m - 1; i >= 0; i-- {\n 118→\t\t\tbuf[i+n] = buf[i]\n 119→\t\t}\n 120→\t\tfor i := range n {\n 121→\t\t\tbuf[i] = prefix[i]\n 122→\t\t}\n 123→\t\treturn buf\n 124→\t}\n 125→}\n 126→\n 127→// walDropped counts WAL messages dropped due to a full channel.\n 128→// Logged periodically; not critical since binary snapshots capture the data.\n 129→var walDropped atomic.Int64\n 130→\n 131→// decodeState holds the per-call scratch buffers used by DecodeLine.\n 132→// Instances are recycled via decodeStatePool to avoid repeated allocations\n 133→// during high-throughput ingestion.\n 134→type decodeState struct {\n 135→\t// metricBuf holds a copy of the current measurement name (line-protocol\n 136→\t// measurement field). Copied because dec.Measurement() returns a slice\n 137→\t// that is invalidated by the next decoder call.\n 138→\tmetricBuf []byte\n 139→\n 140→\t// selector is the sub-device path passed to WriteToLevel and WALMessage\n 141→\t// (e.g. [\"socket0\"] or [\"socket0\", \"memctrl1\"]). Reused across lines.\n 142→\tselector []string\n 143→\n 144→\t// typeBuf accumulates the concatenated \"type\"+\"type-id\" tag value for the\n 145→\t// current line. Reset at the start of each line's tag-decode loop.\n 146→\ttypeBuf []byte\n 147→\n 148→\t// subTypeBuf accumulates the concatenated \"subtype\"+\"stype-id\" tag value.\n 149→\t// Reset at the start of each line's tag-decode loop.\n 150→\tsubTypeBuf []byte\n 151→\n 152→\t// prevTypeBytes / prevTypeStr cache the last seen typeBuf content and its\n 153→\t// string conversion. Because consecutive lines in a batch typically address\n 154→\t// the same sub-device, the cache hit rate is very high and avoids\n 155→\t// repeated []byte→string allocations.\n 156→\tprevTypeBytes []byte\n 157→\tprevTypeStr string\n 158→\n 159→\t// prevSubTypeBytes / prevSubTypeStr are the same cache for the subtype.\n 160→\tprevSubTypeBytes []byte\n 161→\tprevSubTypeStr string\n 162→}\n 163→\n 164→// decodeStatePool recycles decodeState values across DecodeLine calls to\n 165→// reduce GC pressure during sustained metric ingestion.\n 166→var decodeStatePool = sync.Pool{\n 167→\tNew: func() any {\n 168→\t\treturn &decodeState{\n 169→\t\t\tmetricBuf: make([]byte, 0, 16),\n 170→\t\t\tselector: make([]string, 0, 4),\n 171→\t\t\ttypeBuf: make([]byte, 0, 16),\n 172→\t\t\tsubTypeBuf: make([]byte, 0, 16),\n 173→\t\t}\n 174→\t},\n 175→}\n 176→\n 177→// DecodeLine reads all lines from dec (InfluxDB line-protocol) and writes each\n 178→// decoded metric sample into ms.\n 179→//\n 180→// clusterDefault is used as the cluster name for lines that do not carry a\n 181→// \"cluster\" tag. Callers typically supply the ClusterTag value from the NATS\n 182→// subscription configuration.\n 183→//\n 184→// Performance notes:\n 185→// - A decodeState is obtained from decodeStatePool to reuse scratch buffers.\n 186→// - The Level pointer (host-level node in the metric tree) is cached across\n 187→// consecutive lines that share the same cluster+host pair to avoid\n 188→// repeated lock acquisitions on the root and cluster levels.\n 189→// - []byte→string conversions for type/subtype selectors are cached via\n 190→// prevType*/prevSubType* fields because batches typically repeat the same\n 191→// sub-device identifiers.\n 192→// - Timestamp parsing tries Second precision first; if that fails it retries\n 193→// Millisecond, Microsecond, and Nanosecond in turn. A missing timestamp\n 194→// falls back to time.Now().\n 195→//\n 196→// When the checkpoint format is \"wal\" each successfully decoded sample is also\n 197→// sent to WALMessages so the WAL staging goroutine can persist it durably\n 198→// before the next binary snapshot.\n 199→func DecodeLine(dec *lineprotocol.Decoder,\n 200→\tms *MemoryStore,\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"67ad1036-73d1-4f16-8ffa-cc04cb2bb906","timestamp":"2026-04-01T13:17:49.473Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"088a249b-9a46-4679-95e9-fd7753951ca3","timestamp":"2026-04-01T13:17:49.540Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"fe4897b4-c089-4d18-9213-d79822a52448","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_012QihwLcrSqM9RGYaCb7fum","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package metricstore\n 7→\n 8→import (\n 9→\t\"bufio\"\n 10→\t\"encoding/binary\"\n 11→\t\"encoding/json\"\n 12→\t\"fmt\"\n 13→\t\"os\"\n 14→\t\"path/filepath\"\n 15→\t\"sort\"\n 16→\n 17→\tpq \"github.com/parquet-go/parquet-go\"\n 18→)\n 19→\n 20→// ParquetMetricRow is the long-format schema for archived metric data.\n 21→// One row per (host, metric, scope, scope_id, timestamp) data point.\n 22→// Sorted by (cluster, hostname, metric, timestamp) for optimal compression.\n 23→type ParquetMetricRow struct {\n 24→\tCluster string `parquet:\"cluster\"`\n 25→\tHostname string `parquet:\"hostname\"`\n 26→\tMetric string `parquet:\"metric\"`\n 27→\tScope string `parquet:\"scope\"`\n 28→\tScopeID string `parquet:\"scope_id\"`\n 29→\tTimestamp int64 `parquet:\"timestamp\"`\n 30→\tFrequency int64 `parquet:\"frequency\"`\n 31→\tValue float32 `parquet:\"value\"`\n 32→}\n 33→\n 34→// parseScopeFromName infers scope and scope_id from a child level name.\n 35→// Examples: \"socket0\" → (\"socket\", \"0\"), \"core12\" → (\"core\", \"12\"),\n 36→// \"a0\" (accelerator) → (\"accelerator\", \"0\").\n 37→// If the name doesn't match known patterns, it's used as-is for scope with empty scope_id.\n 38→func parseScopeFromName(name string) (string, string) {\n 39→\tprefixes := []struct {\n 40→\t\tprefix string\n 41→\t\tscope string\n 42→\t}{\n 43→\t\t{\"socket\", \"socket\"},\n 44→\t\t{\"memoryDomain\", \"memoryDomain\"},\n 45→\t\t{\"core\", \"core\"},\n 46→\t\t{\"hwthread\", \"hwthread\"},\n 47→\t\t{\"cpu\", \"hwthread\"},\n 48→\t\t{\"accelerator\", \"accelerator\"},\n 49→\t}\n 50→\n 51→\tfor _, p := range prefixes {\n 52→\t\tif len(name) > len(p.prefix) && name[:len(p.prefix)] == p.prefix {\n 53→\t\t\tid := name[len(p.prefix):]\n 54→\t\t\tif len(id) > 0 && id[0] >= '0' && id[0] <= '9' {\n 55→\t\t\t\treturn p.scope, id\n 56→\t\t\t}\n 57→\t\t}\n 58→\t}\n 59→\n 60→\treturn name, \"\"\n 61→}\n 62→\n 63→// parquetArchiveWriter supports incremental writes to a Parquet file.\n 64→// Uses streaming writes to avoid accumulating all rows in memory.\n 65→type parquetArchiveWriter struct {\n 66→\twriter *pq.GenericWriter[ParquetMetricRow]\n 67→\tbw *bufio.Writer\n 68→\tf *os.File\n 69→\tbatch []ParquetMetricRow // reusable batch buffer\n 70→\tcount int\n 71→}\n 72→\n 73→const parquetBatchSize = 1024\n 74→\n 75→// newParquetArchiveWriter creates a streaming Parquet writer with Zstd compression.\n 76→func newParquetArchiveWriter(filename string) (*parquetArchiveWriter, error) {\n 77→\tif err := os.MkdirAll(filepath.Dir(filename), CheckpointDirPerms); err != nil {\n 78→\t\treturn nil, fmt.Errorf(\"creating archive directory: %w\", err)\n 79→\t}\n 80→\n 81→\tf, err := os.OpenFile(filename, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, CheckpointFilePerms)\n 82→\tif err != nil {\n 83→\t\treturn nil, fmt.Errorf(\"creating parquet file: %w\", err)\n 84→\t}\n 85→\n 86→\tbw := bufio.NewWriterSize(f, 1<<20) // 1MB write buffer\n 87→\n 88→\twriter := pq.NewGenericWriter[ParquetMetricRow](bw,\n 89→\t\tpq.Compression(&pq.Zstd),\n 90→\t)\n 91→\n 92→\treturn &parquetArchiveWriter{\n 93→\t\twriter: writer,\n 94→\t\tbw: bw,\n 95→\t\tf: f,\n 96→\t\tbatch: make([]ParquetMetricRow, 0, parquetBatchSize),\n 97→\t}, nil\n 98→}\n 99→\n 100→// WriteCheckpointFile streams a CheckpointFile tree directly to Parquet rows,\n 101→// writing metrics in sorted order without materializing all rows in memory.\n 102→// Call FlushRowGroup() after writing all checkpoint files for a host.\n 103→func (w *parquetArchiveWriter) WriteCheckpointFile(cf *CheckpointFile, cluster, hostname, scope, scopeID string) error {\n 104→\tw.writeLevel(cf, cluster, hostname, scope, scopeID)\n 105→\n 106→\t// Flush remaining batch\n 107→\tif len(w.batch) > 0 {\n 108→\t\tif _, err := w.writer.Write(w.batch); err != nil {\n 109→\t\t\treturn fmt.Errorf(\"writing parquet rows: %w\", err)\n 110→\t\t}\n 111→\t\tw.count += len(w.batch)\n 112→\t\tw.batch = w.batch[:0]\n 113→\t}\n 114→\n 115→\treturn nil\n 116→}\n 117→\n 118→// FlushRowGroup flushes the current row group to the Parquet file.\n 119→// Should be called once per host after all checkpoint files for that host are written.\n 120→func (w *parquetArchiveWriter) FlushRowGroup() error {\n 121→\tif err := w.writer.Flush(); err != nil {\n 122→\t\treturn fmt.Errorf(\"flushing parquet row group: %w\", err)\n 123→\t}\n 124→\treturn nil\n 125→}\n 126→\n 127→// writeLevel recursively writes metrics from a CheckpointFile level.\n 128→// Metric names and child names are sorted for deterministic, compression-friendly output.\n 129→func (w *parquetArchiveWriter) writeLevel(cf *CheckpointFile, cluster, hostname, scope, scopeID string) {\n 130→\t// Sort metric names for deterministic order\n 131→\tmetricNames := make([]string, 0, len(cf.Metrics))\n 132→\tfor name := range cf.Metrics {\n 133→\t\tmetricNames = append(metricNames, name)\n 134→\t}\n 135→\tsort.Strings(metricNames)\n 136→\n 137→\tfor _, metricName := range metricNames {\n 138→\t\tcm := cf.Metrics[metricName]\n 139→\t\tts := cm.Start\n 140→\t\tfor _, v := range cm.Data {\n 141→\t\t\tif !v.IsNaN() {\n 142→\t\t\t\tw.batch = append(w.batch, ParquetMetricRow{\n 143→\t\t\t\t\tCluster: cluster,\n 144→\t\t\t\t\tHostname: hostname,\n 145→\t\t\t\t\tMetric: metricName,\n 146→\t\t\t\t\tScope: scope,\n 147→\t\t\t\t\tScopeID: scopeID,\n 148→\t\t\t\t\tTimestamp: ts,\n 149→\t\t\t\t\tFrequency: cm.Frequency,\n 150→\t\t\t\t\tValue: float32(v),\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"3f3d5477-3b1a-4a13-a633-beefb1385c55","timestamp":"2026-04-01T13:17:49.651Z"},"type":"agent_progress","prompt":"","agentId":"a45167c5a47159b8d"},"toolUseID":"agent_msg_01XaxHD6oArAycMKNnF7c7fY","parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","uuid":"9aab7c65-8c1b-4668-8a58-3d6a9a4dd258","timestamp":"2026-04-01T13:17:49.660Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"9aab7c65-8c1b-4668-8a58-3d6a9a4dd258","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Agent","command":"entire hooks claude-code post-task"},"parentToolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","toolUseID":"toolu_019DRm2hUZN4wfwCbZqu2T5s","timestamp":"2026-04-01T13:18:18.544Z","uuid":"7e7ead5f-9f26-467d-80bf-3f72b2fe1a12","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"eb00b815-88af-4c40-a9a5-17ae54590c68","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_019DRm2hUZN4wfwCbZqu2T5s","type":"tool_result","content":[{"type":"text","text":"Perfect! I now have a comprehensive understanding of the metricstore package. Let me provide you with a complete analysis.\n\n## Comprehensive Metricstore Package Analysis\n\n### 1. Init() Function Signature and Parameters\n\n**Location:** `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` (lines 125-194)\n\n```go\nfunc Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup)\n```\n\n**Parameters:**\n- `rawConfig`: JSON configuration for the metric store (MetricStoreConfig); may be nil to use defaults\n- `metrics`: Map of metric names to their configurations (frequency and aggregation strategy)\n- `wg`: WaitGroup that will be incremented for each background goroutine started\n\n**Key Initialization Steps:**\n1. Validates and decodes JSON metric store configuration\n2. Sets NumWorkers (defaults to min(NumCPU/2+1, 10), max 10)\n3. Calls InitMetrics() to create singleton MemoryStore\n4. Loads checkpoints within retention window from disk\n5. Starts 5 main background workers:\n - `Retention()` - frees old data per retention policy\n - `Checkpointing()` - periodic checkpoint creation\n - `CleanUp()` - archiving or deletion of old checkpoints\n - `WALStaging()` - WAL message processing (if WAL format enabled)\n - `MemoryUsageTracker()` - monitors and enforces memory cap\n6. Optional: Subscribes to NATS for real-time metric ingestion\n\n### 2. Shutdown() Function\n\n**Location:** `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` (lines 274-321)\n\n```go\nfunc Shutdown()\n```\n\n**Behavior:**\n1. Cancels context to stop all background workers\n2. If WAL format: sets shutdownFlag, sleeps 100ms, closes WAL channels, waits for drain\n3. Writes final checkpoint (JSON or WAL format)\n4. Logs timing information\n\n### 3. Configuration Structs\n\n**MetricStoreConfig** (main config):\n```go\ntype MetricStoreConfig struct {\n NumWorkers int // Workers for checkpoint/archive (default: auto)\n RetentionInMemory string // Duration string (e.g., \"48h\")\n CheckpointInterval string // Duration string (default: \"12h\")\n MemoryCap int // Memory cap in GB (triggers forceFree)\n Checkpoints Checkpoints // Checkpoint persistence config\n Debug *Debug // Dev/profiling options\n Cleanup *Cleanup // Long-term storage config\n Subscriptions *Subscriptions // NATS topics\n}\n```\n\n**Checkpoints** (persistence):\n```go\ntype Checkpoints struct {\n FileFormat string // \"json\" or \"wal\" (default: \"wal\")\n RootDir string // Checkpoint directory path\n MaxWALSize int64 // Max WAL file size (0 = unlimited)\n}\n```\n\n**Cleanup** (archiving):\n```go\ntype Cleanup struct {\n RootDir string // Archive path\n Mode string // \"delete\" or \"archive\"\n}\n```\n\n**Debug**:\n```go\ntype Debug struct {\n DumpToFile string // Dump checkpoint path\n EnableGops bool // Enable gops agent\n}\n```\n\n**Subscriptions**:\n```go\ntype Subscriptions []struct {\n SubscribeTo string // NATS subject name\n ClusterTag string // Optional default cluster\n}\n```\n\n**MetricConfig**:\n```go\ntype MetricConfig struct {\n Frequency int64 // Interval in seconds\n Aggregation AggregationStrategy // sum/avg/none\n offset int // Internal index (assigned during Init)\n}\n```\n\n**AggregationStrategy** (enum):\n- `NoAggregation` (0) - Do not aggregate\n- `SumAggregation` (1) - Sum values (e.g., power)\n- `AvgAggregation` (2) - Average values (e.g., temperature)\n\n### 4. Recent Features/Settings Added\n\n**WAL (Write-Ahead Log) Implementation** (walCheckpoint.go):\n- Binary snapshot format (`.bin` files) + append-only WAL (`.wal` files)\n- Replaces JSON snapshot with faster, more compact binary format\n- Per-host WAL files at `checkpoints/cluster/host/current.wal`\n- Magic numbers: `0xCC1DA701` (WAL file), `0xCC1DA7A1` (WAL record), `0xCC5B0001` (binary snapshot)\n- Supports WAL rotation and max WAL size limits\n- Crash-safe with CRC32 checksums on WAL records\n\n**Memory Usage Tracking** (MemoryUsageTracker):\n- Monitors actual heap memory usage (runtime.MemStats)\n- Compares against MemoryCap setting\n- Progressive emergency buffer freeing at 75%, 50%, 25% retention thresholds\n- Adaptive ticker intervals (5 min normal, 30 sec when >80% of cap)\n\n**Selective Buffer Retention** (NodeProvider interface):\n- `SetNodeProvider()` allows caller to provide job state information\n- `Free()` function consults NodeProvider to preserve data for nodes with active jobs\n- `GetUsedNodes()` returns map of cluster→hostnames in active use\n- Enables selective retention beyond retention window for running jobs\n\n**Parquet Archiving** (parquetArchive.go):\n- Long-format archive: one row per (host, metric, scope, timestamp) point\n- Streaming Parquet writer with Zstd compression\n- Parquet schema: cluster, hostname, metric, scope, scope_id, timestamp, frequency, value\n\n### 5. MemoryStore Type and Methods\n\n**MemoryStore** struct:\n```go\ntype MemoryStore struct {\n Metrics map[string]MetricConfig\n root Level\n nodeProvider NodeProvider\n}\n```\n\n**Key Public Methods:**\n- `Write(selector []string, ts int64, metrics []Metric)` - Write metrics at specific level\n- `Read(selector util.Selector, metric string, from, to, resolution int64)` - Query metrics with aggregation\n- `GetLevel(selector []string)` - Get/create level at selector path\n- `ListChildren(selector []string)` - List child names at selector\n- `Free(selector []string, t int64)` - Free buffers older than t\n- `ForceFree()` - Unconditionally remove oldest buffers\n- `FreeAll()` - Clear all data\n- `GetPaths(targetDepth int)` - Get selector paths at specific depth\n- `SizeInBytes()` / `SizeInGB()` - Memory usage statistics\n- `FromCheckpointFiles(dir string, from int64)` - Load checkpoints at startup\n- `ToCheckpoint(dir, from, to int64)` - Write JSON checkpoints\n- `ToCheckpointWAL(dir, from, to int64)` - Write binary snapshots + rotate WAL\n- `SetNodeProvider(provider NodeProvider)` - Set job state provider\n\n### 6. Checkpoint/Retention/Cleanup/NATS Structures and Functions\n\n**Checkpoint Functions:**\n- `Checkpointing(wg, ctx)` - Background worker, runs every 12h (default)\n- `FromCheckpoint(dir, from int64)` - Parallel checkpoint loading\n- `FromCheckpointFiles(dir, from int64)` - Entry point at startup\n- `ToCheckpoint(dir, from, to int64)` - JSON format (parallel with worker pool)\n- `ToCheckpointWAL(dir, from, to int64)` - Binary format with WAL rotation\n\n**WAL Functions:**\n- `WALStaging(wg, ctx)` - N sharded goroutines, hash-routed per cluster+node\n- `SendWALMessage(msg *WALMessage)` - Non-blocking send to WAL channel\n- `RotateWALFiles(hostDirs []string)` - Request WAL rotation after snapshot\n- `writeWALRecordDirect(w, msg)` - Write single WAL record with CRC\n- `readWALRecord(r)` - Read and validate one WAL record\n- `loadWALFile(m, f, from int64)` - Replay WAL on startup\n\n**Retention Functions:**\n- `Retention(wg, ctx)` - Background worker, runs every RetentionInMemory/2\n- `Free(ms *MemoryStore, t time.Time)` - Free buffers, respecting NodeProvider\n- `FreeSelected(ms, selectors, t)` - Free specific selector paths only\n- `GetSelectors(ms, excludeMap)` - Build list of selectors to free\n\n**Cleanup/Archive Functions:**\n- `CleanUp(wg, ctx)` - Background worker, interval = RetentionInMemory\n- `CleanupCheckpoints(dir, cleanupDir, from, deleteInstead)` - Delete or archive\n- `deleteCheckpoints(dir, from)` - Parallel deletion of old checkpoints\n- `archiveCheckpoints(dir, cleanupDir, from)` - Convert to Parquet + delete originals\n\n**Memory Monitoring:**\n- `MemoryUsageTracker(wg, ctx)` - Monitors heap usage, force-frees when over cap\n- `bufferPool` - PersistentBufferPool for buffer reuse\n\n**NATS Integration:**\n- `ReceiveNats(ms, workers, ctx)` - Subscribe to NATS topics, decode line protocol\n- `DecodeLine(dec, ms, clusterDefault)` - Parse InfluxDB line protocol\n- `Keys.Subscriptions` - Array of NATS subscription configs\n\n**Level (Hierarchical Tree Node):**\n```go\ntype Level struct {\n children map[string]*Level\n metrics []*buffer // One per metric\n lock sync.RWMutex\n}\n```\n\nMethods: `findLevelOrCreate()`, `findBuffers()`, `findLevel()`, `free()`, `forceFree()`, `sizeInBytes()`, `collectPaths()`\n\n**Buffer (Time-Series Storage):**\n```go\ntype buffer struct {\n prev *buffer\n next *buffer\n data []schema.Float\n frequency int64\n start int64\n archived bool\n closed bool\n lastUsed int64\n}\n```\n\nMethods: `write()`, `read()`, `free()`, `forceFreeOldest()`, `iterFromTo()`, linked-list chain with default capacity 512 floats.\n\n---\n\n**File Paths for Reference:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` - Core Init/Shutdown\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` - Configuration structs\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/checkpoint.go` - JSON checkpoint implementation\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go` - WAL + binary snapshot\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/archive.go` - Archive/cleanup worker\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/level.go` - Hierarchical tree structure\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/buffer.go` - Time-series buffer chains"},{"type":"text","text":"agentId: a45167c5a47159b8d (use SendMessage with to: 'a45167c5a47159b8d' to continue this agent)\n<usage>total_tokens: 83558\ntool_uses: 15\nduration_ms: 47169</usage>"}]}]},"uuid":"3534dd66-a658-4b13-a3a1-5d0bc6cdda11","timestamp":"2026-04-01T13:18:18.543Z","toolUseResult":{"status":"completed","prompt":"Explore the metricstore package in /Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/. Read ALL files in that directory. I need to understand:\n\n1. The Init() function signature and all parameters it accepts\n2. The Shutdown() function\n3. The configuration struct(s) used - what fields they have\n4. Any new features or settings added recently\n5. The MemoryStore type and its methods\n6. Any checkpoint, retention, cleanup, or NATS subscription related structs/functions\n\nReturn the full content of all files in that directory.","agentId":"a45167c5a47159b8d","content":[{"type":"text","text":"Perfect! I now have a comprehensive understanding of the metricstore package. Let me provide you with a complete analysis.\n\n## Comprehensive Metricstore Package Analysis\n\n### 1. Init() Function Signature and Parameters\n\n**Location:** `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` (lines 125-194)\n\n```go\nfunc Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup)\n```\n\n**Parameters:**\n- `rawConfig`: JSON configuration for the metric store (MetricStoreConfig); may be nil to use defaults\n- `metrics`: Map of metric names to their configurations (frequency and aggregation strategy)\n- `wg`: WaitGroup that will be incremented for each background goroutine started\n\n**Key Initialization Steps:**\n1. Validates and decodes JSON metric store configuration\n2. Sets NumWorkers (defaults to min(NumCPU/2+1, 10), max 10)\n3. Calls InitMetrics() to create singleton MemoryStore\n4. Loads checkpoints within retention window from disk\n5. Starts 5 main background workers:\n - `Retention()` - frees old data per retention policy\n - `Checkpointing()` - periodic checkpoint creation\n - `CleanUp()` - archiving or deletion of old checkpoints\n - `WALStaging()` - WAL message processing (if WAL format enabled)\n - `MemoryUsageTracker()` - monitors and enforces memory cap\n6. Optional: Subscribes to NATS for real-time metric ingestion\n\n### 2. Shutdown() Function\n\n**Location:** `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` (lines 274-321)\n\n```go\nfunc Shutdown()\n```\n\n**Behavior:**\n1. Cancels context to stop all background workers\n2. If WAL format: sets shutdownFlag, sleeps 100ms, closes WAL channels, waits for drain\n3. Writes final checkpoint (JSON or WAL format)\n4. Logs timing information\n\n### 3. Configuration Structs\n\n**MetricStoreConfig** (main config):\n```go\ntype MetricStoreConfig struct {\n NumWorkers int // Workers for checkpoint/archive (default: auto)\n RetentionInMemory string // Duration string (e.g., \"48h\")\n CheckpointInterval string // Duration string (default: \"12h\")\n MemoryCap int // Memory cap in GB (triggers forceFree)\n Checkpoints Checkpoints // Checkpoint persistence config\n Debug *Debug // Dev/profiling options\n Cleanup *Cleanup // Long-term storage config\n Subscriptions *Subscriptions // NATS topics\n}\n```\n\n**Checkpoints** (persistence):\n```go\ntype Checkpoints struct {\n FileFormat string // \"json\" or \"wal\" (default: \"wal\")\n RootDir string // Checkpoint directory path\n MaxWALSize int64 // Max WAL file size (0 = unlimited)\n}\n```\n\n**Cleanup** (archiving):\n```go\ntype Cleanup struct {\n RootDir string // Archive path\n Mode string // \"delete\" or \"archive\"\n}\n```\n\n**Debug**:\n```go\ntype Debug struct {\n DumpToFile string // Dump checkpoint path\n EnableGops bool // Enable gops agent\n}\n```\n\n**Subscriptions**:\n```go\ntype Subscriptions []struct {\n SubscribeTo string // NATS subject name\n ClusterTag string // Optional default cluster\n}\n```\n\n**MetricConfig**:\n```go\ntype MetricConfig struct {\n Frequency int64 // Interval in seconds\n Aggregation AggregationStrategy // sum/avg/none\n offset int // Internal index (assigned during Init)\n}\n```\n\n**AggregationStrategy** (enum):\n- `NoAggregation` (0) - Do not aggregate\n- `SumAggregation` (1) - Sum values (e.g., power)\n- `AvgAggregation` (2) - Average values (e.g., temperature)\n\n### 4. Recent Features/Settings Added\n\n**WAL (Write-Ahead Log) Implementation** (walCheckpoint.go):\n- Binary snapshot format (`.bin` files) + append-only WAL (`.wal` files)\n- Replaces JSON snapshot with faster, more compact binary format\n- Per-host WAL files at `checkpoints/cluster/host/current.wal`\n- Magic numbers: `0xCC1DA701` (WAL file), `0xCC1DA7A1` (WAL record), `0xCC5B0001` (binary snapshot)\n- Supports WAL rotation and max WAL size limits\n- Crash-safe with CRC32 checksums on WAL records\n\n**Memory Usage Tracking** (MemoryUsageTracker):\n- Monitors actual heap memory usage (runtime.MemStats)\n- Compares against MemoryCap setting\n- Progressive emergency buffer freeing at 75%, 50%, 25% retention thresholds\n- Adaptive ticker intervals (5 min normal, 30 sec when >80% of cap)\n\n**Selective Buffer Retention** (NodeProvider interface):\n- `SetNodeProvider()` allows caller to provide job state information\n- `Free()` function consults NodeProvider to preserve data for nodes with active jobs\n- `GetUsedNodes()` returns map of cluster→hostnames in active use\n- Enables selective retention beyond retention window for running jobs\n\n**Parquet Archiving** (parquetArchive.go):\n- Long-format archive: one row per (host, metric, scope, timestamp) point\n- Streaming Parquet writer with Zstd compression\n- Parquet schema: cluster, hostname, metric, scope, scope_id, timestamp, frequency, value\n\n### 5. MemoryStore Type and Methods\n\n**MemoryStore** struct:\n```go\ntype MemoryStore struct {\n Metrics map[string]MetricConfig\n root Level\n nodeProvider NodeProvider\n}\n```\n\n**Key Public Methods:**\n- `Write(selector []string, ts int64, metrics []Metric)` - Write metrics at specific level\n- `Read(selector util.Selector, metric string, from, to, resolution int64)` - Query metrics with aggregation\n- `GetLevel(selector []string)` - Get/create level at selector path\n- `ListChildren(selector []string)` - List child names at selector\n- `Free(selector []string, t int64)` - Free buffers older than t\n- `ForceFree()` - Unconditionally remove oldest buffers\n- `FreeAll()` - Clear all data\n- `GetPaths(targetDepth int)` - Get selector paths at specific depth\n- `SizeInBytes()` / `SizeInGB()` - Memory usage statistics\n- `FromCheckpointFiles(dir string, from int64)` - Load checkpoints at startup\n- `ToCheckpoint(dir, from, to int64)` - Write JSON checkpoints\n- `ToCheckpointWAL(dir, from, to int64)` - Write binary snapshots + rotate WAL\n- `SetNodeProvider(provider NodeProvider)` - Set job state provider\n\n### 6. Checkpoint/Retention/Cleanup/NATS Structures and Functions\n\n**Checkpoint Functions:**\n- `Checkpointing(wg, ctx)` - Background worker, runs every 12h (default)\n- `FromCheckpoint(dir, from int64)` - Parallel checkpoint loading\n- `FromCheckpointFiles(dir, from int64)` - Entry point at startup\n- `ToCheckpoint(dir, from, to int64)` - JSON format (parallel with worker pool)\n- `ToCheckpointWAL(dir, from, to int64)` - Binary format with WAL rotation\n\n**WAL Functions:**\n- `WALStaging(wg, ctx)` - N sharded goroutines, hash-routed per cluster+node\n- `SendWALMessage(msg *WALMessage)` - Non-blocking send to WAL channel\n- `RotateWALFiles(hostDirs []string)` - Request WAL rotation after snapshot\n- `writeWALRecordDirect(w, msg)` - Write single WAL record with CRC\n- `readWALRecord(r)` - Read and validate one WAL record\n- `loadWALFile(m, f, from int64)` - Replay WAL on startup\n\n**Retention Functions:**\n- `Retention(wg, ctx)` - Background worker, runs every RetentionInMemory/2\n- `Free(ms *MemoryStore, t time.Time)` - Free buffers, respecting NodeProvider\n- `FreeSelected(ms, selectors, t)` - Free specific selector paths only\n- `GetSelectors(ms, excludeMap)` - Build list of selectors to free\n\n**Cleanup/Archive Functions:**\n- `CleanUp(wg, ctx)` - Background worker, interval = RetentionInMemory\n- `CleanupCheckpoints(dir, cleanupDir, from, deleteInstead)` - Delete or archive\n- `deleteCheckpoints(dir, from)` - Parallel deletion of old checkpoints\n- `archiveCheckpoints(dir, cleanupDir, from)` - Convert to Parquet + delete originals\n\n**Memory Monitoring:**\n- `MemoryUsageTracker(wg, ctx)` - Monitors heap usage, force-frees when over cap\n- `bufferPool` - PersistentBufferPool for buffer reuse\n\n**NATS Integration:**\n- `ReceiveNats(ms, workers, ctx)` - Subscribe to NATS topics, decode line protocol\n- `DecodeLine(dec, ms, clusterDefault)` - Parse InfluxDB line protocol\n- `Keys.Subscriptions` - Array of NATS subscription configs\n\n**Level (Hierarchical Tree Node):**\n```go\ntype Level struct {\n children map[string]*Level\n metrics []*buffer // One per metric\n lock sync.RWMutex\n}\n```\n\nMethods: `findLevelOrCreate()`, `findBuffers()`, `findLevel()`, `free()`, `forceFree()`, `sizeInBytes()`, `collectPaths()`\n\n**Buffer (Time-Series Storage):**\n```go\ntype buffer struct {\n prev *buffer\n next *buffer\n data []schema.Float\n frequency int64\n start int64\n archived bool\n closed bool\n lastUsed int64\n}\n```\n\nMethods: `write()`, `read()`, `free()`, `forceFreeOldest()`, `iterFromTo()`, linked-list chain with default capacity 512 floats.\n\n---\n\n**File Paths for Reference:**\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go` - Core Init/Shutdown\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` - Configuration structs\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/checkpoint.go` - JSON checkpoint implementation\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/walCheckpoint.go` - WAL + binary snapshot\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/archive.go` - Archive/cleanup worker\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/level.go` - Hierarchical tree structure\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/buffer.go` - Time-series buffer chains"}],"totalDurationMs":47169,"totalTokens":83558,"totalToolUseCount":15,"usage":{"input_tokens":6,"cache_creation_input_tokens":8650,"cache_read_input_tokens":72006,"output_tokens":2896,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":8650},"inference_geo":"","iterations":[],"speed":"standard"}},"sourceToolAssistantUUID":"eb00b815-88af-4c40-a9a5-17ae54590c68","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"382d460c-cb43-4fdf-a492-0b8ccea063b0","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_012RsRzSBTvvoksHcPMQ7ALW","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package main\n 7→\n 8→import (\n 9→\t\"context\"\n 10→\t\"flag\"\n 11→\t\"fmt\"\n 12→\t\"os\"\n 13→\t\"os/signal\"\n 14→\t\"runtime/debug\"\n 15→\t\"sync\"\n 16→\t\"syscall\"\n 17→\n 18→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 19→\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n 20→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 22→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 23→\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n 24→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 25→\t\"github.com/google/gops/agent\"\n 26→)\n 27→\n 28→const (\n 29→\tenvGOGC = \"GOGC\"\n 30→)\n 31→\n 32→var (\n 33→\tdate string\n 34→\tcommit string\n 35→\tversion string\n 36→)\n 37→\n 38→var (\n 39→\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n 40→\tflagConfigFile, flagLogLevel string\n 41→)\n 42→\n 43→func printVersion() {\n 44→\tfmt.Printf(\"Version:\\t%s\\n\", version)\n 45→\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n 46→\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n 47→}\n 48→\n 49→func runServer(ctx context.Context) error {\n 50→\tvar wg sync.WaitGroup\n 51→\n 52→\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n 53→\tif mscfg == nil {\n 54→\t\treturn fmt.Errorf(\"missing metrics configuration\")\n 55→\t}\n 56→\tconfig.InitMetrics(mscfg)\n 57→\n 58→\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n 59→\tif mscfg == nil {\n 60→\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n 61→\t}\n 62→\n 63→\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n 64→\n 65→\t// Set GC percent if not configured\n 66→\tif os.Getenv(envGOGC) == \"\" {\n 67→\t\tdebug.SetGCPercent(15)\n 68→\t}\n 69→\n 70→\tif config.Keys.BackendURL != \"\" {\n 71→\t\tms := metricstore.GetMemoryStore()\n 72→\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n 73→\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n 74→\t}\n 75→\n 76→\t// Initialize HTTP server\n 77→\tsrv, err := NewServer(version, commit, date)\n 78→\tif err != nil {\n 79→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n 80→\t}\n 81→\n 82→\t// Channel to collect errors from server\n 83→\terrChan := make(chan error, 1)\n 84→\n 85→\t// Start HTTP server\n 86→\twg.Go(func() {\n 87→\t\tif err := srv.Start(ctx); err != nil {\n 88→\t\t\terrChan <- err\n 89→\t\t}\n 90→\t})\n 91→\n 92→\t// Handle shutdown signals\n 93→\twg.Add(1)\n 94→\tsigs := make(chan os.Signal, 1)\n 95→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n 96→\tgo func() {\n 97→\t\tdefer wg.Done()\n 98→\t\tselect {\n 99→\t\tcase <-sigs:\n 100→\t\t\tcclog.Info(\"Shutdown signal received\")\n 101→\t\tcase <-ctx.Done():\n 102→\t\t}\n 103→\n 104→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n 105→\t\tsrv.Shutdown(ctx)\n 106→\t}()\n 107→\n 108→\truntime.SystemdNotify(true, \"running\")\n 109→\n 110→\t// Wait for completion or errors\n 111→\tgo func() {\n 112→\t\twg.Wait()\n 113→\t\tclose(errChan)\n 114→\t}()\n 115→\n 116→\t// Wait for either server startup error or shutdown completion\n 117→\tif err := <-errChan; err != nil {\n 118→\t\treturn err\n 119→\t}\n 120→\n 121→\tcclog.Print(\"Graceful shutdown completed!\")\n 122→\treturn nil\n 123→}\n 124→\n 125→func run() error {\n 126→\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n 127→\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n 128→\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n 129→\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n 130→\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n 131→\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n 132→\tflag.Parse()\n 133→\n 134→\tif flagVersion {\n 135→\t\tprintVersion()\n 136→\t\treturn nil\n 137→\t}\n 138→\n 139→\tcclog.Init(flagLogLevel, flagLogDateTime)\n 140→\n 141→\tif flagGops || config.Keys.Debug.EnableGops {\n 142→\t\tif err := agent.Listen(agent.Options{}); err != nil {\n 143→\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n 144→\t\t}\n 145→\t}\n 146→\n 147→\tccconf.Init(flagConfigFile)\n 148→\n 149→\tcfg := ccconf.GetPackageConfig(\"main\")\n 150→\tif cfg == nil {\n 151→\t\treturn fmt.Errorf(\"main configuration must be present\")\n 152→\t}\n 153→\n 154→\tconfig.Init(cfg)\n 155→\n 156→\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n 157→\tif err := nats.Init(natsConfig); err != nil {\n 158→\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n 159→\t}\n 160→\tnats.Connect()\n 161→\n 162→\tctx, cancel := context.WithCancel(context.Background())\n 163→\tdefer cancel()\n 164→\n 165→\treturn runServer(ctx)\n 166→}\n 167→\n 168→func main() {\n 169→\tif err := run(); err != nil {\n 170→\t\tcclog.Error(err.Error())\n 171→\t\tos.Exit(1)\n 172→\t}\n 173→}\n 174→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"5c9c1a06-9ffa-4959-988f-d5c5c5807cb9","timestamp":"2026-04-01T13:18:22.319Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\t// Set GC percent if not configured\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","numLines":174,"startLine":1,"totalLines":174}},"sourceToolAssistantUUID":"382d460c-cb43-4fdf-a492-0b8ccea063b0","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"5c9c1a06-9ffa-4959-988f-d5c5c5807cb9","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_019anX79XZxA4Bic7pxjbC1n","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01JgDLAyFcdkXzCcEnbKkR7M","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3207,"cache_read_input_tokens":20598,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":3207},"output_tokens":29,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd7jP7LBGUjv4dy6x8NZ","type":"assistant","uuid":"8572a32d-40e7-4e70-ab4b-d5ba30e894c1","timestamp":"2026-04-01T13:18:22.734Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"8572a32d-40e7-4e70-ab4b-d5ba30e894c1","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_01JgDLAyFcdkXzCcEnbKkR7M","toolUseID":"toolu_01JgDLAyFcdkXzCcEnbKkR7M","timestamp":"2026-04-01T13:18:22.748Z","uuid":"65eafa00-8429-4dc2-a952-f52f8a0dbfb1","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"8572a32d-40e7-4e70-ab4b-d5ba30e894c1","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01JgDLAyFcdkXzCcEnbKkR7M","type":"tool_result","content":" 1→{\n 2→ \"main\": {\n 3→ \"addr\": \"0.0.0.0:8082\",\n 4→ \"https-cert-file\": \"\",\n 5→ \"https-key-file\": \"\",\n 6→ \"jwt-public-key\": \"REDACTED\"\n 7→ },\n 8→ \"nats\": {\n 9→ \"address\": \"nats://0.0.0.0:4222\",\n 10→ \"username\": \"root\",\n 11→ \"password\": \"root\"\n 12→ },\n 13→ \"metric-store\": {\n 14→ \"checkpoints\": {\n 15→ \"interval\": \"12h\",\n 16→ \"directory\": \"./var/checkpoints\"\n 17→ },\n 18→ \"memory-cap\": 100,\n 19→ \"retention-in-memory\": \"48h\",\n 20→ \"cleanup\": {\n 21→ \"mode\": \"archive\",\n 22→ \"interval\": \"48h\",\n 23→ \"directory\": \"./var/archive\"\n 24→ },\n 25→ \"nats-subscriptions\": [\n 26→ {\n 27→ \"subscribe-to\": \"hpc-nats\",\n 28→ \"cluster-tag\": \"fritz\"\n 29→ },\n 30→ {\n 31→ \"subscribe-to\": \"hpc-nats\",\n 32→ \"cluster-tag\": \"alex\"\n 33→ }\n 34→ ]\n 35→ },\n 36→ \"metrics\": {\n 37→ \"debug_metric\": {\n 38→ \"frequency\": 60,\n 39→ \"aggregation\": \"avg\"\n 40→ },\n 41→ \"clock\": {\n 42→ \"frequency\": 60,\n 43→ \"aggregation\": \"avg\"\n 44→ },\n 45→ \"cpu_idle\": {\n 46→ \"frequency\": 60,\n 47→ \"aggregation\": \"avg\"\n 48→ },\n 49→ \"cpu_iowait\": {\n 50→ \"frequency\": 60,\n 51→ \"aggregation\": \"avg\"\n 52→ },\n 53→ \"cpu_irq\": {\n 54→ \"frequency\": 60,\n 55→ \"aggregation\": \"avg\"\n 56→ },\n 57→ \"cpu_system\": {\n 58→ \"frequency\": 60,\n 59→ \"aggregation\": \"avg\"\n 60→ },\n 61→ \"cpu_user\": {\n 62→ \"frequency\": 60,\n 63→ \"aggregation\": \"avg\"\n 64→ },\n 65→ \"nv_mem_util\": {\n 66→ \"frequency\": 60,\n 67→ \"aggregation\": \"avg\"\n 68→ },\n 69→ \"nv_temp\": {\n 70→ \"frequency\": 60,\n 71→ \"aggregation\": \"avg\"\n 72→ },\n 73→ \"nv_sm_clock\": {\n 74→ \"frequency\": 60,\n 75→ \"aggregation\": \"avg\"\n 76→ },\n 77→ \"acc_utilization\": {\n 78→ \"frequency\": 60,\n 79→ \"aggregation\": \"avg\"\n 80→ },\n 81→ \"acc_mem_used\": {\n 82→ \"frequency\": 60,\n 83→ \"aggregation\": \"sum\"\n 84→ },\n 85→ \"acc_power\": {\n 86→ \"frequency\": 60,\n 87→ \"aggregation\": \"sum\"\n 88→ },\n 89→ \"flops_any\": {\n 90→ \"frequency\": 60,\n 91→ \"aggregation\": \"sum\"\n 92→ },\n 93→ \"flops_dp\": {\n 94→ \"frequency\": 60,\n 95→ \"aggregation\": \"sum\"\n 96→ },\n 97→ \"flops_sp\": {\n 98→ \"frequency\": 60,\n 99→ \"aggregation\": \"sum\"\n 100→ },\n 101→ \"ib_recv\": {\n 102→ \"frequency\": 60,\n 103→ \"aggregation\": \"sum\"\n 104→ },\n 105→ \"ib_xmit\": {\n 106→ \"frequency\": 60,\n 107→ \"aggregation\": \"sum\"\n 108→ },\n 109→ \"ib_recv_pkts\": {\n 110→ \"frequency\": 60,\n 111→ \"aggregation\": \"sum\"\n 112→ },\n 113→ \"ib_xmit_pkts\": {\n 114→ \"frequency\": 60,\n 115→ \"aggregation\": \"sum\"\n 116→ },\n 117→ \"cpu_power\": {\n 118→ \"frequency\": 60,\n 119→ \"aggregation\": \"sum\"\n 120→ },\n 121→ \"core_power\": {\n 122→ \"frequency\": 60,\n 123→ \"aggregation\": \"sum\"\n 124→ },\n 125→ \"mem_power\": {\n 126→ \"frequency\": 60,\n 127→ \"aggregation\": \"sum\"\n 128→ },\n 129→ \"ipc\": {\n 130→ \"frequency\": 60,\n 131→ \"aggregation\": \"avg\"\n 132→ },\n 133→ \"cpu_load\": {\n 134→ \"frequency\": 60,\n 135→ \"aggregation\": null\n 136→ },\n 137→ \"lustre_close\": {\n 138→ \"frequency\": 60,\n 139→ \"aggregation\": null\n 140→ },\n 141→ \"lustre_open\": {\n 142→ \"frequency\": 60,\n 143→ \"aggregation\": null\n 144→ },\n 145→ \"lustre_statfs\": {\n 146→ \"frequency\": 60,\n 147→ \"aggregation\": null\n 148→ },\n 149→ \"lustre_read_bytes\": {\n 150→ \"frequency\": 60,\n 151→ \"aggregation\": null\n 152→ },\n 153→ \"lustre_write_bytes\": {\n 154→ \"frequency\": 60,\n 155→ \"aggregation\": null\n 156→ },\n 157→ \"net_bw\": {\n 158→ \"frequency\": 60,\n 159→ \"aggregation\": null\n 160→ },\n 161→ \"file_bw\": {\n 162→ \"frequency\": 60,\n 163→ \"aggregation\": null\n 164→ },\n 165→ \"mem_bw\": {\n 166→ \"frequency\": 60,\n 167→ \"aggregation\": \"sum\"\n 168→ },\n 169→ \"mem_cached\": {\n 170→ \"frequency\": 60,\n 171→ \"aggregation\": null\n 172→ },\n 173→ \"mem_used\": {\n 174→ \"frequency\": 60,\n 175→ \"aggregation\": null\n 176→ },\n 177→ \"net_bytes_in\": {\n 178→ \"frequency\": 60,\n 179→ \"aggregation\": null\n 180→ },\n 181→ \"net_bytes_out\": {\n 182→ \"frequency\": 60,\n 183→ \"aggregation\": null\n 184→ },\n 185→ \"nfs4_read\": {\n 186→ \"frequency\": 60,\n 187→ \"aggregation\": null\n 188→ },\n 189→ \"nfs4_total\": {\n 190→ \"frequency\": 60,\n 191→ \"aggregation\": null\n 192→ },\n 193→ \"nfs4_write\": {\n 194→ \"frequency\": 60,\n 195→ \"aggregation\": null\n 196→ },\n 197→ \"vectorization_ratio\": {\n 198→ \"frequency\": 60,\n 199→ \"aggregation\": \"avg\"\n 200→ }\n 201→ }\n 202→}\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"64531cce-a4c1-4820-9674-907d3548d261","timestamp":"2026-04-01T13:18:22.747Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json","content":"{\n \"main\": {\n \"addr\": \"0.0.0.0:8082\",\n \"https-cert-file\": \"\",\n \"https-key-file\": \"\",\n \"jwt-public-key\": \"REDACTED\"\n },\n \"nats\": {\n \"address\": \"nats://0.0.0.0:4222\",\n \"username\": \"root\",\n \"password\": \"root\"\n },\n \"metric-store\": {\n \"checkpoints\": {\n \"interval\": \"12h\",\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"48h\",\n \"cleanup\": {\n \"mode\": \"archive\",\n \"interval\": \"48h\",\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [\n {\n \"subscribe-to\": \"hpc-nats\",\n \"cluster-tag\": \"fritz\"\n },\n {\n \"subscribe-to\": \"hpc-nats\",\n \"cluster-tag\": \"alex\"\n }\n ]\n },\n \"metrics\": {\n \"debug_metric\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"clock\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"cpu_idle\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"cpu_iowait\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"cpu_irq\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"cpu_system\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"cpu_user\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"nv_mem_util\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"nv_temp\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"nv_sm_clock\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"acc_utilization\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"acc_mem_used\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"acc_power\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"flops_any\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"flops_dp\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"flops_sp\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"ib_recv\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"ib_xmit\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"ib_recv_pkts\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"ib_xmit_pkts\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"cpu_power\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"core_power\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"mem_power\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"ipc\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n },\n \"cpu_load\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"lustre_close\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"lustre_open\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"lustre_statfs\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"lustre_read_bytes\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"lustre_write_bytes\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"net_bw\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"file_bw\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"mem_bw\": {\n \"frequency\": 60,\n \"aggregation\": \"sum\"\n },\n \"mem_cached\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"mem_used\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"net_bytes_in\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"net_bytes_out\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"nfs4_read\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"nfs4_total\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"nfs4_write\": {\n \"frequency\": 60,\n \"aggregation\": null\n },\n \"vectorization_ratio\": {\n \"frequency\": 60,\n \"aggregation\": \"avg\"\n }\n }\n}","numLines":202,"startLine":1,"totalLines":202}},"sourceToolAssistantUUID":"8572a32d-40e7-4e70-ab4b-d5ba30e894c1","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"a9e3bd2b-b613-4f35-a221-d6fab4a11434","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_017Wmf6nanscgmTF2Jd1jXPG","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides config.go: Configuration structures and metric management.\n 7→//\n 8→// # Configuration Hierarchy\n 9→//\n 10→// The metricstore package uses nested configuration structures:\n 11→//\n 12→//\tMetricStoreConfig (Keys)\n 13→//\t├─ NumWorkers: Parallel checkpoint/archive workers\n 14→//\t├─ RetentionInMemory: How long to keep data in RAM (also used as cleanup interval)\n 15→//\t├─ MemoryCap: Memory limit in bytes (triggers forceFree)\n 16→//\t├─ Checkpoints: Persistence configuration\n 17→//\t│ ├─ FileFormat: \"json\" or \"wal\" (default: \"wal\")\n 18→//\t│ └─ RootDir: Checkpoint storage path\n 19→//\t├─ Cleanup: Long-term storage configuration (interval = RetentionInMemory)\n 20→//\t│ ├─ RootDir: Archive storage path (archive mode only)\n 21→//\t│ └─ Mode: \"delete\" or \"archive\"\n 22→//\t├─ Debug: Development/debugging options\n 23→//\t└─ Subscriptions: NATS topic subscriptions for metric ingestion\n 24→//\n 25→// # Metric Configuration\n 26→//\n 27→// Each metric (e.g., \"cpu_load\", \"mem_used\") has a MetricConfig entry in the global\n 28→// Metrics map, defining:\n 29→//\n 30→// - Frequency: Measurement interval in seconds\n 31→// - Aggregation: How to combine values (sum/avg/none) when transforming scopes\n 32→// - offset: Internal index into Level.metrics slice (assigned during Init)\n 33→//\n 34→// # AggregationStrategy\n 35→//\n 36→// Determines how to combine metric values when aggregating from finer to coarser scopes:\n 37→//\n 38→// - NoAggregation: Do not combine (incompatible scopes)\n 39→// - SumAggregation: Add values (e.g., power consumption: core→socket)\n 40→// - AvgAggregation: Average values (e.g., temperature: core→socket)\n 41→package metricstore\n 42→\n 43→import (\n 44→\t\"fmt\"\n 45→\t\"time\"\n 46→\n 47→\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n 48→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 49→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 50→)\n 51→\n 52→const (\n 53→\tDefaultMaxWorkers = 10\n 54→\tDefaultBufferCapacity = 512\n 55→\tDefaultGCTriggerInterval = 100\n 56→\tDefaultMemoryUsageTrackerInterval = 5 * time.Minute\n 57→)\n 58→\n 59→// Checkpoints configures periodic persistence of in-memory metric data.\n 60→//\n 61→// Fields:\n 62→// - FileFormat: \"json\" (human-readable, periodic) or \"wal\" (binary snapshot + WAL, crash-safe); default is \"wal\"\n 63→// - RootDir: Filesystem path for checkpoint files (created if missing)\n 64→// - MaxWALSize: Maximum size in bytes for a single host's WAL file; 0 = unlimited (default).\n 65→// When exceeded the WAL is force-rotated to prevent unbounded disk growth.\n 66→type Checkpoints struct {\n 67→\tFileFormat string `json:\"file-format\"`\n 68→\tRootDir string `json:\"directory\"`\n 69→\tMaxWALSize int64 `json:\"max-wal-size,omitempty\"`\n 70→}\n 71→\n 72→// Debug provides development and profiling options.\n 73→//\n 74→// Fields:\n 75→// - DumpToFile: Path to dump checkpoint data for inspection (empty = disabled)\n 76→// - EnableGops: Enable gops agent for live runtime debugging (https://github.com/google/gops)\n 77→type Debug struct {\n 78→\tDumpToFile string `json:\"dump-to-file\"`\n 79→\tEnableGops bool `json:\"gops\"`\n 80→}\n 81→\n 82→// Cleanup configures long-term storage of old metric data.\n 83→//\n 84→// Data older than RetentionInMemory is archived to disk or deleted.\n 85→// The cleanup interval is always RetentionInMemory.\n 86→//\n 87→// Fields:\n 88→// - RootDir: Filesystem path for archived data (used in \"archive\" mode)\n 89→// - Mode: \"delete\" (discard old data) or \"archive\" (write to RootDir)\n 90→type Cleanup struct {\n 91→\tRootDir string `json:\"directory\"`\n 92→\tMode string `json:\"mode\"`\n 93→}\n 94→\n 95→// Subscriptions defines NATS topics to subscribe to for metric ingestion.\n 96→//\n 97→// Each subscription receives metrics via NATS messaging, enabling real-time\n 98→// data collection from compute nodes.\n 99→//\n 100→// Fields:\n 101→// - SubscribeTo: NATS subject/channel name (e.g., \"metrics.compute.*\")\n 102→// - ClusterTag: Default cluster name for metrics without cluster tag (optional)\n 103→type Subscriptions []struct {\n 104→\t// Channel name\n 105→\tSubscribeTo string `json:\"subscribe-to\"`\n 106→\n 107→\t// Allow lines without a cluster tag, use this as default, optional\n 108→\tClusterTag string `json:\"cluster-tag\"`\n 109→}\n 110→\n 111→// MetricStoreConfig defines the main configuration for the metricstore.\n 112→//\n 113→// Loaded from cc-backend's config.json \"metricstore\" section. Controls memory usage,\n 114→// persistence, archiving, and metric ingestion.\n 115→//\n 116→// Fields:\n 117→// - NumWorkers: Parallel workers for checkpoint/archive (0 = auto: min(NumCPU/2+1, 10))\n 118→// - RetentionInMemory: Duration string (e.g., \"48h\") for in-memory data retention\n 119→// - MemoryCap: Max memory in GB for buffer data (0 = unlimited); triggers forceFree when exceeded\n 120→// - Checkpoints: Periodic persistence configuration\n 121→// - Debug: Development/profiling options (nil = disabled)\n 122→// - Archive: Long-term storage configuration (nil = disabled)\n 123→// - Subscriptions: NATS topics for metric ingestion (nil = polling only)\n 124→type MetricStoreConfig struct {\n 125→\t// Number of concurrent workers for checkpoint and archive operations.\n 126→\t// If not set or 0, defaults to min(runtime.NumCPU()/2+1, 10)\n 127→\tNumWorkers int `json:\"num-workers\"`\n 128→\tRetentionInMemory string `json:\"retention-in-memory\"`\n 129→\tCheckpointInterval string `json:\"checkpoint-interval,omitempty\"`\n 130→\tMemoryCap int `json:\"memory-cap\"`\n 131→\tCheckpoints Checkpoints `json:\"checkpoints\"`\n 132→\tDebug *Debug `json:\"debug\"`\n 133→\tCleanup *Cleanup `json:\"cleanup\"`\n 134→\tSubscriptions *Subscriptions `json:\"nats-subscriptions\"`\n 135→}\n 136→\n 137→// Keys is the global metricstore configuration instance.\n 138→//\n 139→// Initialized with defaults, then overwritten by cc-backend's config.json.\n 140→// Accessed by Init(), Checkpointing(), and other lifecycle functions.\n 141→var Keys MetricStoreConfig = MetricStoreConfig{\n 142→\tCheckpoints: Checkpoints{\n 143→\t\tFileFormat: \"wal\",\n 144→\t\tRootDir: \"./var/checkpoints\",\n 145→\t},\n 146→\tCleanup: &Cleanup{\n 147→\t\tMode: \"delete\",\n 148→\t},\n 149→}\n 150→\n 151→// AggregationStrategy defines how to combine metric values across hierarchy levels.\n 152→//\n 153→// Used when transforming data from finer-grained scopes (e.g., core) to coarser scopes\n 154→// (e.g., socket). This is SPATIAL aggregation, not TEMPORAL (time-based) aggregation.\n 155→//\n 156→// Values:\n 157→// - NoAggregation: Do not aggregate (incompatible scopes or non-aggregatable metrics)\n 158→// - SumAggregation: Add values (e.g., power: sum core power → socket power)\n 159→// - AvgAggregation: Average values (e.g., temperature: average core temps → socket temp)\n 160→type AggregationStrategy int\n 161→\n 162→const (\n 163→\tNoAggregation AggregationStrategy = iota // Do not aggregate\n 164→\tSumAggregation // Sum values (e.g., power, energy)\n 165→\tAvgAggregation // Average values (e.g., temperature, utilization)\n 166→)\n 167→\n 168→// AssignAggregationStrategy parses a string into an AggregationStrategy value.\n 169→//\n 170→// Used when loading metric configurations from JSON/YAML files.\n 171→//\n 172→// Parameters:\n 173→// - str: \"sum\", \"avg\", or \"\" (empty string for NoAggregation)\n 174→//\n 175→// Returns:\n 176→// - AggregationStrategy: Parsed value\n 177→// - error: Non-nil if str is unrecognized\n 178→func AssignAggregationStrategy(str string) (AggregationStrategy, error) {\n 179→\tswitch str {\n 180→\tcase \"\":\n 181→\t\treturn NoAggregation, nil\n 182→\tcase \"sum\":\n 183→\t\treturn SumAggregation, nil\n 184→\tcase \"avg\":\n 185→\t\treturn AvgAggregation, nil\n 186→\tdefault:\n 187→\t\treturn NoAggregation, fmt.Errorf(\"[METRICSTORE]> unknown aggregation strategy: %s\", str)\n 188→\t}\n 189→}\n 190→\n 191→// MetricConfig defines configuration for a single metric type.\n 192→//\n 193→// Stored in the global Metrics map, keyed by metric name (e.g., \"cpu_load\").\n 194→//\n 195→// Fields:\n 196→// - Frequency: Measurement interval in seconds (e.g., 60 for 1-minute granularity)\n 197→// - Aggregation: How to combine values across hierarchy levels (sum/avg/none)\n 198→// - offset: Internal index into Level.metrics slice (assigned during Init)\n 199→type MetricConfig struct {\n 200→\t// Interval in seconds at which measurements are stored\n 201→\tFrequency int64\n 202→\n 203→\t// Can be 'sum', 'avg' or null. Describes how to aggregate metrics from the same timestep over the hierarchy.\n 204→\tAggregation AggregationStrategy\n 205→\n 206→\t// Private, used internally...\n 207→\toffset int\n 208→}\n 209→\n 210→func BuildMetricList() map[string]MetricConfig {\n 211→\tvar metrics map[string]MetricConfig = make(map[string]MetricConfig)\n 212→\n 213→\taddMetric := func(name string, metric MetricConfig) error {\n 214→\t\tif metrics == nil {\n 215→\t\t\tmetrics = make(map[string]MetricConfig, 0)\n 216→\t\t}\n 217→\n 218→\t\tif existingMetric, ok := metrics[name]; ok {\n 219→\t\t\tif existingMetric.Frequency != metric.Frequency {\n 220→\t\t\t\tif existingMetric.Frequency < metric.Frequency {\n 221→\t\t\t\t\texistingMetric.Frequency = metric.Frequency\n 222→\t\t\t\t\tmetrics[name] = existingMetric\n 223→\t\t\t\t}\n 224→\t\t\t}\n 225→\t\t} else {\n 226→\t\t\tmetrics[name] = metric\n 227→\t\t}\n 228→\n 229→\t\treturn nil\n 230→\t}\n 231→\n 232→\t// Helper function to add metric configuration\n 233→\taddMetricConfig := func(mc *schema.MetricConfig) {\n 234→\t\tagg, err := AssignAggregationStrategy(mc.Aggregation)\n 235→\t\tif err != nil {\n 236→\t\t\tcclog.Warnf(\"Could not find aggregation strategy for metric config '%s': %s\", mc.Name, err.Error())\n 237→\t\t}\n 238→\n 239→\t\taddMetric(mc.Name, MetricConfig{\n 240→\t\t\tFrequency: int64(mc.Timestep),\n 241→\t\t\tAggregation: agg,\n 242→\t\t})\n 243→\t}\n 244→\tfor _, c := range archive.Clusters {\n 245→\t\tfor _, mc := range c.MetricConfig {\n 246→\t\t\taddMetricConfig(mc)\n 247→\t\t}\n 248→\n 249→\t\tfor _, sc := range c.SubClusters {\n 250→\t\t\tfor _, mc := range sc.MetricConfig {\n 251→\t\t\t\taddMetricConfig(mc)\n 252→\t\t\t}\n 253→\t\t}\n 254→\t}\n 255→\n 256→\treturn metrics\n 257→}\n 258→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"74632cf2-be83-4c93-95ac-aacfc5cf9a8c","timestamp":"2026-04-01T13:18:23.097Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package metricstore provides config.go: Configuration structures and metric management.\n//\n// # Configuration Hierarchy\n//\n// The metricstore package uses nested configuration structures:\n//\n//\tMetricStoreConfig (Keys)\n//\t├─ NumWorkers: Parallel checkpoint/archive workers\n//\t├─ RetentionInMemory: How long to keep data in RAM (also used as cleanup interval)\n//\t├─ MemoryCap: Memory limit in bytes (triggers forceFree)\n//\t├─ Checkpoints: Persistence configuration\n//\t│ ├─ FileFormat: \"json\" or \"wal\" (default: \"wal\")\n//\t│ └─ RootDir: Checkpoint storage path\n//\t├─ Cleanup: Long-term storage configuration (interval = RetentionInMemory)\n//\t│ ├─ RootDir: Archive storage path (archive mode only)\n//\t│ └─ Mode: \"delete\" or \"archive\"\n//\t├─ Debug: Development/debugging options\n//\t└─ Subscriptions: NATS topic subscriptions for metric ingestion\n//\n// # Metric Configuration\n//\n// Each metric (e.g., \"cpu_load\", \"mem_used\") has a MetricConfig entry in the global\n// Metrics map, defining:\n//\n// - Frequency: Measurement interval in seconds\n// - Aggregation: How to combine values (sum/avg/none) when transforming scopes\n// - offset: Internal index into Level.metrics slice (assigned during Init)\n//\n// # AggregationStrategy\n//\n// Determines how to combine metric values when aggregating from finer to coarser scopes:\n//\n// - NoAggregation: Do not combine (incompatible scopes)\n// - SumAggregation: Add values (e.g., power consumption: core→socket)\n// - AvgAggregation: Average values (e.g., temperature: core→socket)\npackage metricstore\n\nimport (\n\t\"fmt\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n)\n\nconst (\n\tDefaultMaxWorkers = 10\n\tDefaultBufferCapacity = 512\n\tDefaultGCTriggerInterval = 100\n\tDefaultMemoryUsageTrackerInterval = 5 * time.Minute\n)\n\n// Checkpoints configures periodic persistence of in-memory metric data.\n//\n// Fields:\n// - FileFormat: \"json\" (human-readable, periodic) or \"wal\" (binary snapshot + WAL, crash-safe); default is \"wal\"\n// - RootDir: Filesystem path for checkpoint files (created if missing)\n// - MaxWALSize: Maximum size in bytes for a single host's WAL file; 0 = unlimited (default).\n// When exceeded the WAL is force-rotated to prevent unbounded disk growth.\ntype Checkpoints struct {\n\tFileFormat string `json:\"file-format\"`\n\tRootDir string `json:\"directory\"`\n\tMaxWALSize int64 `json:\"max-wal-size,omitempty\"`\n}\n\n// Debug provides development and profiling options.\n//\n// Fields:\n// - DumpToFile: Path to dump checkpoint data for inspection (empty = disabled)\n// - EnableGops: Enable gops agent for live runtime debugging (https://github.com/google/gops)\ntype Debug struct {\n\tDumpToFile string `json:\"dump-to-file\"`\n\tEnableGops bool `json:\"gops\"`\n}\n\n// Cleanup configures long-term storage of old metric data.\n//\n// Data older than RetentionInMemory is archived to disk or deleted.\n// The cleanup interval is always RetentionInMemory.\n//\n// Fields:\n// - RootDir: Filesystem path for archived data (used in \"archive\" mode)\n// - Mode: \"delete\" (discard old data) or \"archive\" (write to RootDir)\ntype Cleanup struct {\n\tRootDir string `json:\"directory\"`\n\tMode string `json:\"mode\"`\n}\n\n// Subscriptions defines NATS topics to subscribe to for metric ingestion.\n//\n// Each subscription receives metrics via NATS messaging, enabling real-time\n// data collection from compute nodes.\n//\n// Fields:\n// - SubscribeTo: NATS subject/channel name (e.g., \"metrics.compute.*\")\n// - ClusterTag: Default cluster name for metrics without cluster tag (optional)\ntype Subscriptions []struct {\n\t// Channel name\n\tSubscribeTo string `json:\"subscribe-to\"`\n\n\t// Allow lines without a cluster tag, use this as default, optional\n\tClusterTag string `json:\"cluster-tag\"`\n}\n\n// MetricStoreConfig defines the main configuration for the metricstore.\n//\n// Loaded from cc-backend's config.json \"metricstore\" section. Controls memory usage,\n// persistence, archiving, and metric ingestion.\n//\n// Fields:\n// - NumWorkers: Parallel workers for checkpoint/archive (0 = auto: min(NumCPU/2+1, 10))\n// - RetentionInMemory: Duration string (e.g., \"48h\") for in-memory data retention\n// - MemoryCap: Max memory in GB for buffer data (0 = unlimited); triggers forceFree when exceeded\n// - Checkpoints: Periodic persistence configuration\n// - Debug: Development/profiling options (nil = disabled)\n// - Archive: Long-term storage configuration (nil = disabled)\n// - Subscriptions: NATS topics for metric ingestion (nil = polling only)\ntype MetricStoreConfig struct {\n\t// Number of concurrent workers for checkpoint and archive operations.\n\t// If not set or 0, defaults to min(runtime.NumCPU()/2+1, 10)\n\tNumWorkers int `json:\"num-workers\"`\n\tRetentionInMemory string `json:\"retention-in-memory\"`\n\tCheckpointInterval string `json:\"checkpoint-interval,omitempty\"`\n\tMemoryCap int `json:\"memory-cap\"`\n\tCheckpoints Checkpoints `json:\"checkpoints\"`\n\tDebug *Debug `json:\"debug\"`\n\tCleanup *Cleanup `json:\"cleanup\"`\n\tSubscriptions *Subscriptions `json:\"nats-subscriptions\"`\n}\n\n// Keys is the global metricstore configuration instance.\n//\n// Initialized with defaults, then overwritten by cc-backend's config.json.\n// Accessed by Init(), Checkpointing(), and other lifecycle functions.\nvar Keys MetricStoreConfig = MetricStoreConfig{\n\tCheckpoints: Checkpoints{\n\t\tFileFormat: \"wal\",\n\t\tRootDir: \"./var/checkpoints\",\n\t},\n\tCleanup: &Cleanup{\n\t\tMode: \"delete\",\n\t},\n}\n\n// AggregationStrategy defines how to combine metric values across hierarchy levels.\n//\n// Used when transforming data from finer-grained scopes (e.g., core) to coarser scopes\n// (e.g., socket). This is SPATIAL aggregation, not TEMPORAL (time-based) aggregation.\n//\n// Values:\n// - NoAggregation: Do not aggregate (incompatible scopes or non-aggregatable metrics)\n// - SumAggregation: Add values (e.g., power: sum core power → socket power)\n// - AvgAggregation: Average values (e.g., temperature: average core temps → socket temp)\ntype AggregationStrategy int\n\nconst (\n\tNoAggregation AggregationStrategy = iota // Do not aggregate\n\tSumAggregation // Sum values (e.g., power, energy)\n\tAvgAggregation // Average values (e.g., temperature, utilization)\n)\n\n// AssignAggregationStrategy parses a string into an AggregationStrategy value.\n//\n// Used when loading metric configurations from JSON/YAML files.\n//\n// Parameters:\n// - str: \"sum\", \"avg\", or \"\" (empty string for NoAggregation)\n//\n// Returns:\n// - AggregationStrategy: Parsed value\n// - error: Non-nil if str is unrecognized\nfunc AssignAggregationStrategy(str string) (AggregationStrategy, error) {\n\tswitch str {\n\tcase \"\":\n\t\treturn NoAggregation, nil\n\tcase \"sum\":\n\t\treturn SumAggregation, nil\n\tcase \"avg\":\n\t\treturn AvgAggregation, nil\n\tdefault:\n\t\treturn NoAggregation, fmt.Errorf(\"[METRICSTORE]> unknown aggregation strategy: %s\", str)\n\t}\n}\n\n// MetricConfig defines configuration for a single metric type.\n//\n// Stored in the global Metrics map, keyed by metric name (e.g., \"cpu_load\").\n//\n// Fields:\n// - Frequency: Measurement interval in seconds (e.g., 60 for 1-minute granularity)\n// - Aggregation: How to combine values across hierarchy levels (sum/avg/none)\n// - offset: Internal index into Level.metrics slice (assigned during Init)\ntype MetricConfig struct {\n\t// Interval in seconds at which measurements are stored\n\tFrequency int64\n\n\t// Can be 'sum', 'avg' or null. Describes how to aggregate metrics from the same timestep over the hierarchy.\n\tAggregation AggregationStrategy\n\n\t// Private, used internally...\n\toffset int\n}\n\nfunc BuildMetricList() map[string]MetricConfig {\n\tvar metrics map[string]MetricConfig = make(map[string]MetricConfig)\n\n\taddMetric := func(name string, metric MetricConfig) error {\n\t\tif metrics == nil {\n\t\t\tmetrics = make(map[string]MetricConfig, 0)\n\t\t}\n\n\t\tif existingMetric, ok := metrics[name]; ok {\n\t\t\tif existingMetric.Frequency != metric.Frequency {\n\t\t\t\tif existingMetric.Frequency < metric.Frequency {\n\t\t\t\t\texistingMetric.Frequency = metric.Frequency\n\t\t\t\t\tmetrics[name] = existingMetric\n\t\t\t\t}\n\t\t\t}\n\t\t} else {\n\t\t\tmetrics[name] = metric\n\t\t}\n\n\t\treturn nil\n\t}\n\n\t// Helper function to add metric configuration\n\taddMetricConfig := func(mc *schema.MetricConfig) {\n\t\tagg, err := AssignAggregationStrategy(mc.Aggregation)\n\t\tif err != nil {\n\t\t\tcclog.Warnf(\"Could not find aggregation strategy for metric config '%s': %s\", mc.Name, err.Error())\n\t\t}\n\n\t\taddMetric(mc.Name, MetricConfig{\n\t\t\tFrequency: int64(mc.Timestep),\n\t\t\tAggregation: agg,\n\t\t})\n\t}\n\tfor _, c := range archive.Clusters {\n\t\tfor _, mc := range c.MetricConfig {\n\t\t\taddMetricConfig(mc)\n\t\t}\n\n\t\tfor _, sc := range c.SubClusters {\n\t\t\tfor _, mc := range sc.MetricConfig {\n\t\t\t\taddMetricConfig(mc)\n\t\t\t}\n\t\t}\n\t}\n\n\treturn metrics\n}\n","numLines":258,"startLine":1,"totalLines":258}},"sourceToolAssistantUUID":"a9e3bd2b-b613-4f35-a221-d6fab4a11434","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"20899f68-d47b-4971-b9e0-b69eb5665cd1","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01U5gSxH8rpgq71gqxQUHHHA","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package config\n 7→\n 8→import (\n 9→\t\"bytes\"\n 10→\t\"encoding/json\"\n 11→\t\"fmt\"\n 12→\n 13→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 14→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 15→)\n 16→\n 17→var metrics map[string]metricstore.MetricConfig\n 18→\n 19→type Config struct {\n 20→\tAddress string `json:\"addr\"`\n 21→\tCertFile string `json:\"https-cert-file\"`\n 22→\tKeyFile string `json:\"https-key-file\"`\n 23→\tUser string `json:\"user\"`\n 24→\tGroup string `json:\"group\"`\n 25→\tBackendURL string `json:\"backend-url\"`\n 26→\tDebug struct {\n 27→\t\tDumpToFile string `json:\"dump-to-file\"`\n 28→\t\tEnableGops bool `json:\"gops\"`\n 29→\t} `json:\"debug\"`\n 30→\tJwtPublicKey string `json:\"jwt-public-key\"`\n 31→}\n 32→\n 33→var Keys Config\n 34→\n 35→type metricConfigJSON struct {\n 36→\tFrequency int64 `json:\"frequency\"`\n 37→\tAggregation string `json:\"aggregation\"`\n 38→}\n 39→\n 40→func InitMetrics(metricConfig json.RawMessage) {\n 41→\tValidate(metricConfigSchema, metricConfig)\n 42→\n 43→\tvar tempMetrics map[string]metricConfigJSON\n 44→\tdec := json.NewDecoder(bytes.NewReader(metricConfig))\n 45→\tdec.DisallowUnknownFields()\n 46→\tif err := dec.Decode(&tempMetrics); err != nil {\n 47→\t\tcclog.Abortf(\"Config Init: Could not decode config file '%s'.\\nError: %s\\n\", metricConfig, err.Error())\n 48→\t}\n 49→\n 50→\tmetrics = make(map[string]metricstore.MetricConfig)\n 51→\tfor name, cfg := range tempMetrics {\n 52→\t\tagg, err := metricstore.AssignAggregationStrategy(cfg.Aggregation)\n 53→\t\tif err != nil {\n 54→\t\t\tcclog.Warnf(\"Could not parse aggregation strategy for metric '%s': %s\", name, err.Error())\n 55→\t\t}\n 56→\t\tmetrics[name] = metricstore.MetricConfig{\n 57→\t\t\tFrequency: cfg.Frequency,\n 58→\t\t\tAggregation: agg,\n 59→\t\t}\n 60→\t}\n 61→}\n 62→\n 63→func Init(mainConfig json.RawMessage) {\n 64→\tValidate(configSchema, mainConfig)\n 65→\tdec := json.NewDecoder(bytes.NewReader(mainConfig))\n 66→\tdec.DisallowUnknownFields()\n 67→\tif err := dec.Decode(&Keys); err != nil {\n 68→\t\tcclog.Abortf(\"Config Init: Could not decode config file '%s'.\\nError: %s\\n\", mainConfig, err.Error())\n 69→\t}\n 70→}\n 71→\n 72→func GetMetricFrequency(metricName string) (int64, error) {\n 73→\tif metric, ok := metrics[metricName]; ok {\n 74→\t\treturn metric.Frequency, nil\n 75→\t}\n 76→\treturn 0, fmt.Errorf(\"metric %s not found\", metricName)\n 77→}\n 78→\n 79→func GetMetrics() map[string]metricstore.MetricConfig {\n 80→\treturn metrics\n 81→}\n 82→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"0264b70f-8879-4208-a09f-d2c66054a7d1","timestamp":"2026-04-01T13:18:36.122Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/config.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage config\n\nimport (\n\t\"bytes\"\n\t\"encoding/json\"\n\t\"fmt\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n)\n\nvar metrics map[string]metricstore.MetricConfig\n\ntype Config struct {\n\tAddress string `json:\"addr\"`\n\tCertFile string `json:\"https-cert-file\"`\n\tKeyFile string `json:\"https-key-file\"`\n\tUser string `json:\"user\"`\n\tGroup string `json:\"group\"`\n\tBackendURL string `json:\"backend-url\"`\n\tDebug struct {\n\t\tDumpToFile string `json:\"dump-to-file\"`\n\t\tEnableGops bool `json:\"gops\"`\n\t} `json:\"debug\"`\n\tJwtPublicKey string `json:\"jwt-public-key\"`\n}\n\nvar Keys Config\n\ntype metricConfigJSON struct {\n\tFrequency int64 `json:\"frequency\"`\n\tAggregation string `json:\"aggregation\"`\n}\n\nfunc InitMetrics(metricConfig json.RawMessage) {\n\tValidate(metricConfigSchema, metricConfig)\n\n\tvar tempMetrics map[string]metricConfigJSON\n\tdec := json.NewDecoder(bytes.NewReader(metricConfig))\n\tdec.DisallowUnknownFields()\n\tif err := dec.Decode(&tempMetrics); err != nil {\n\t\tcclog.Abortf(\"Config Init: Could not decode config file '%s'.\\nError: %s\\n\", metricConfig, err.Error())\n\t}\n\n\tmetrics = make(map[string]metricstore.MetricConfig)\n\tfor name, cfg := range tempMetrics {\n\t\tagg, err := metricstore.AssignAggregationStrategy(cfg.Aggregation)\n\t\tif err != nil {\n\t\t\tcclog.Warnf(\"Could not parse aggregation strategy for metric '%s': %s\", name, err.Error())\n\t\t}\n\t\tmetrics[name] = metricstore.MetricConfig{\n\t\t\tFrequency: cfg.Frequency,\n\t\t\tAggregation: agg,\n\t\t}\n\t}\n}\n\nfunc Init(mainConfig json.RawMessage) {\n\tValidate(configSchema, mainConfig)\n\tdec := json.NewDecoder(bytes.NewReader(mainConfig))\n\tdec.DisallowUnknownFields()\n\tif err := dec.Decode(&Keys); err != nil {\n\t\tcclog.Abortf(\"Config Init: Could not decode config file '%s'.\\nError: %s\\n\", mainConfig, err.Error())\n\t}\n}\n\nfunc GetMetricFrequency(metricName string) (int64, error) {\n\tif metric, ok := metrics[metricName]; ok {\n\t\treturn metric.Frequency, nil\n\t}\n\treturn 0, fmt.Errorf(\"metric %s not found\", metricName)\n}\n\nfunc GetMetrics() map[string]metricstore.MetricConfig {\n\treturn metrics\n}\n","numLines":82,"startLine":1,"totalLines":82}},"sourceToolAssistantUUID":"20899f68-d47b-4971-b9e0-b69eb5665cd1","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"e5f54130-3e44-4a72-bf56-d44cf3a00352","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TrSWCC39QBYUdxd9WQ318D","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package config\n 7→\n 8→var configSchema = `\n 9→{\n 10→ \"type\": \"object\",\n 11→ \"properties\": {\n 12→ \"addr\": {\n 13→ \"description\": \"Address where the http (or https) server will listen on (for example: 'localhost:8080').\",\n 14→ \"type\": \"string\"\n 15→ },\n 16→ \"https-cert-file\": {\n 17→ \"description\": \"Filepath to SSL certificate. If also https-key-file is set, use HTTPS.\",\n 18→ \"type\": \"string\"\n 19→ },\n 20→ \"https-key-file\": {\n 21→ \"description\": \"Filepath to SSL key file. If also https-cert-file is set, use HTTPS.\",\n 22→ \"type\": \"string\"\n 23→ },\n 24→ \"user\": {\n 25→ \"description\": \"Drop root permissions once the port was taken. Only applicable if using privileged port.\",\n 26→ \"type\": \"string\"\n 27→ },\n 28→ \"group\": {\n 29→ \"description\": \"Drop root permissions once the port was taken. Only applicable if using privileged port.\",\n 30→ \"type\": \"string\"\n 31→ },\n 32→ \"backend-url\": {\n 33→ \"description\": \"URL of cc-backend for querying job information (e.g., 'https://localhost:8080').\",\n 34→ \"type\": \"string\"\n 35→ },\n 36→ \"debug\": {\n 37→ \"description\": \"Debug options.\",\n 38→ \"type\": \"object\",\n 39→ \"properties\": {\n 40→ \"dump-to-file\": {\n 41→ \"description\": \"Path to file for dumping internal state.\",\n 42→ \"type\": \"string\"\n 43→ },\n 44→ \"gops\": {\n 45→ \"description\": \"Enable gops agent for debugging.\",\n 46→ \"type\": \"boolean\"\n 47→ }\n 48→ }\n 49→ },\n 50→ \"jwt-public-key\": {\n 51→ \"description\": \"Ed25519 public key for JWT verification.\",\n 52→ \"type\": \"string\"\n 53→ }\n 54→ }\n 55→}`\n 56→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"6b1a6542-4bab-4c80-a333-e179ced85847","timestamp":"2026-04-01T13:18:36.493Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/internal/config/schema.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage config\n\nvar configSchema = `\n{\n \"type\": \"object\",\n \"properties\": {\n \"addr\": {\n \"description\": \"Address where the http (or https) server will listen on (for example: 'localhost:8080').\",\n \"type\": \"string\"\n },\n \"https-cert-file\": {\n \"description\": \"Filepath to SSL certificate. If also https-key-file is set, use HTTPS.\",\n \"type\": \"string\"\n },\n \"https-key-file\": {\n \"description\": \"Filepath to SSL key file. If also https-cert-file is set, use HTTPS.\",\n \"type\": \"string\"\n },\n \"user\": {\n \"description\": \"Drop root permissions once the port was taken. Only applicable if using privileged port.\",\n \"type\": \"string\"\n },\n \"group\": {\n \"description\": \"Drop root permissions once the port was taken. Only applicable if using privileged port.\",\n \"type\": \"string\"\n },\n \"backend-url\": {\n \"description\": \"URL of cc-backend for querying job information (e.g., 'https://localhost:8080').\",\n \"type\": \"string\"\n },\n \"debug\": {\n \"description\": \"Debug options.\",\n \"type\": \"object\",\n \"properties\": {\n \"dump-to-file\": {\n \"description\": \"Path to file for dumping internal state.\",\n \"type\": \"string\"\n },\n \"gops\": {\n \"description\": \"Enable gops agent for debugging.\",\n \"type\": \"boolean\"\n }\n }\n },\n \"jwt-public-key\": {\n \"description\": \"Ed25519 public key for JWT verification.\",\n \"type\": \"string\"\n }\n }\n}`\n","numLines":56,"startLine":1,"totalLines":56}},"sourceToolAssistantUUID":"e5f54130-3e44-4a72-bf56-d44cf3a00352","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"c10aab67-f8f0-4b00-a028-887e7f1ef837","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_014iGMqJod7TtCQ94vM1Sork","toolUseID":"toolu_014iGMqJod7TtCQ94vM1Sork","timestamp":"2026-04-01T13:18:37.110Z","uuid":"b35e06e4-ac7b-44f8-a110-019521082271","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"c10aab67-f8f0-4b00-a028-887e7f1ef837","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_014iGMqJod7TtCQ94vM1Sork","type":"tool_result","content":" 1→# ClusterCockpit Metric Store\n 2→\n 3→[![Build & Test](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml/badge.svg)](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml)\n 4→\n 5→The cc-metric-store provides a simple in-memory time series database for storing\n 6→metrics of cluster nodes at preconfigured intervals. It is meant to be used as\n 7→part of the [ClusterCockpit suite](https://github.com/ClusterCockpit). As all\n 8→data is kept in-memory, accessing it is very fast. It also provides topology aware\n 9→aggregations over time _and_ nodes/sockets/cpus.\n 10→\n 11→The storage engine is provided by the\n 12→[cc-backend](https://github.com/ClusterCockpit/cc-backend) package\n 13→(`cc-backend/pkg/metricstore`). This repository provides the HTTP API wrapper.\n 14→\n 15→The [NATS.io](https://nats.io/) based writing endpoint and the HTTP write\n 16→endpoint both consume messages in [this format of the InfluxDB line\n 17→protocol](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md).\n 18→\n 19→## Building\n 20→\n 21→`cc-metric-store` can be built using the provided `Makefile`.\n 22→It supports the following targets:\n 23→\n 24→- `make`: Build the application, copy an example configuration file and generate\n 25→ checkpoint folders if required.\n 26→- `make clean`: Clean the golang build cache and application binary\n 27→- `make distclean`: In addition to the clean target also remove the `./var`\n 28→ folder and `config.json`\n 29→- `make swagger`: Regenerate the Swagger files from the source comments.\n 30→- `make test`: Run tests and basic checks (`go build`, `go vet`, `go test`).\n 31→\n 32→## Running\n 33→\n 34→```sh\n 35→./cc-metric-store # Uses ./config.json\n 36→./cc-metric-store -config /path/to/config.json\n 37→./cc-metric-store -dev # Enable Swagger UI at /swagger/\n 38→./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n 39→./cc-metric-store -logdate # Add date and time to log messages\n 40→./cc-metric-store -version # Show version information and exit\n 41→./cc-metric-store -gops # Enable gops agent for debugging\n 42→```\n 43→\n 44→## REST API Endpoints\n 45→\n 46→The REST API is documented in [swagger.json](./api/swagger.json). You can\n 47→explore and try the REST API using the integrated [SwaggerUI web\n 48→interface](http://localhost:8082/swagger/) (requires the `-dev` flag).\n 49→\n 50→For more information on the `cc-metric-store` REST API have a look at the\n 51→ClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-rest-api/).\n 52→\n 53→All endpoints support both trailing-slash and non-trailing-slash variants:\n 54→\n 55→| Method | Path | Description |\n 56→| ------ | ------------------- | -------------------------------------- |\n 57→| `GET` | `/api/query/` | Query metrics with selectors |\n 58→| `POST` | `/api/write/` | Write metrics (InfluxDB line protocol) |\n 59→| `POST` | `/api/free/` | Free buffers up to a timestamp |\n 60→| `GET` | `/api/debug/` | Dump internal state |\n 61→| `GET` | `/api/healthcheck/` | Check node health status |\n 62→\n 63→If `jwt-public-key` is set in `config.json`, all endpoints require JWT\n 64→authentication using an Ed25519 key (`Authorization: Bearer <token>`).\n 65→\n 66→## Run tests\n 67→\n 68→Some benchmarks concurrently access the `MemoryStore`, so enabling the\n 69→[Race Detector](https://golang.org/doc/articles/race_detector) might be useful.\n 70→The benchmarks also work as tests as they do check if the returned values are as\n 71→expected.\n 72→\n 73→```sh\n 74→# Tests only\n 75→go test -v ./...\n 76→\n 77→# Benchmarks as well\n 78→go test -bench=. -race -v ./...\n 79→```\n 80→\n 81→## What are these selectors mentioned in the code?\n 82→\n 83→The cc-metric-store works as a time-series database and uses the InfluxDB line\n 84→protocol as input format. Unlike InfluxDB, the data is indexed by one single\n 85→strictly hierarchical tree structure. A selector is built out of the tags in the\n 86→InfluxDB line protocol, and can be used to select a node (not in the sense of a\n 87→compute node, can also be a socket, cpu, ...) in that tree. The implementation\n 88→calls those nodes `level` to avoid confusion. It is impossible to access data\n 89→only by knowing the _socket_ or _cpu_ tag — all higher up levels have to be\n 90→specified as well.\n 91→\n 92→This is what the hierarchy currently looks like:\n 93→\n 94→- cluster1\n 95→ - host1\n 96→ - socket0\n 97→ - socket1\n 98→ - ...\n 99→ - cpu1\n 100→ - cpu2\n 101→ - cpu3\n 102→ - cpu4\n 103→ - ...\n 104→ - gpu1\n 105→ - gpu2\n 106→ - host2\n 107→ - ...\n 108→- cluster2\n 109→- ...\n 110→\n 111→Example selectors:\n 112→\n 113→1. `[\"cluster1\", \"host1\", \"cpu0\"]`: Select only the cpu0 of host1 in cluster1\n 114→2. `[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\", \"cpu6\", \"cpu7\"]]`: Select only CPUs 4-7 of host1 in cluster1\n 115→3. `[\"cluster1\", \"host1\"]`: Select the complete node. If querying for a CPU-specific metric such as flops, all CPUs are implied\n 116→\n 117→## Config file\n 118→\n 119→The config file is a JSON document with four top-level sections.\n 120→\n 121→### `main`\n 122→\n 123→```json\n 124→\"main\": {\n 125→ \"addr\": \"0.0.0.0:8082\",\n 126→ \"https-cert-file\": \"\",\n 127→ \"https-key-file\": \"\",\n 128→ \"jwt-public-key\": \"<base64-encoded Ed25519 public key>\",\n 129→ \"user\": \"\",\n 130→ \"group\": \"\",\n 131→ \"backend-url\": \"\"\n 132→}\n 133→```\n 134→\n 135→- `addr`: Address and port to listen on (default: `0.0.0.0:8082`)\n 136→- `https-cert-file` / `https-key-file`: Paths to TLS certificate/key for HTTPS\n 137→- `jwt-public-key`: Base64-encoded Ed25519 public key for JWT authentication. If empty, no auth is required.\n 138→- `user` / `group`: Drop privileges to this user/group after startup\n 139→- `backend-url`: Optional URL of a cc-backend instance used as node provider\n 140→\n 141→### `metrics`\n 142→\n 143→Per-metric configuration. Each key is the metric name:\n 144→\n 145→```json\n 146→\"metrics\": {\n 147→ \"cpu_load\": { \"frequency\": 60, \"aggregation\": null },\n 148→ \"flops_any\": { \"frequency\": 60, \"aggregation\": \"sum\" },\n 149→ \"cpu_user\": { \"frequency\": 60, \"aggregation\": \"avg\" }\n 150→}\n 151→```\n 152→\n 153→- `frequency`: Sampling interval in seconds\n 154→- `aggregation`: How to aggregate sub-level data: `\"sum\"`, `\"avg\"`, or `null` (no aggregation)\n 155→\n 156→### `metric-store`\n 157→\n 158→```json\n 159→\"metric-store\": {\n 160→ \"checkpoints\": {\n 161→ \"file-format\": \"wal\",\n 162→ \"directory\": \"./var/checkpoints\"\n 163→ },\n 164→ \"memory-cap\": 100,\n 165→ \"retention-in-memory\": \"24h\",\n 166→ \"num-workers\": 0,\n 167→ \"cleanup\": {\n 168→ \"mode\": \"archive\",\n 169→ \"directory\": \"./var/archive\"\n 170→ },\n 171→ \"nats-subscriptions\": [\n 172→ { \"subscribe-to\": \"hpc-nats\", \"cluster-tag\": \"fritz\" }\n 173→ ]\n 174→}\n 175→```\n 176→\n 177→- `checkpoints.file-format`: Checkpoint format: `\"json\"` (default, human-readable) or `\"wal\"` (binary WAL, crash-safe). See [Checkpoint formats](#checkpoint-formats) below.\n 178→- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n 179→- `memory-cap`: Approximate memory cap in MB for metric buffers\n 180→- `retention-in-memory`: How long to keep data in memory (e.g. `\"48h\"`)\n 181→- `num-workers`: Number of parallel workers for checkpoint/archive I/O (0 = auto, capped at 10)\n 182→- `cleanup.mode`: What to do with data older than `retention-in-memory`: `\"archive\"` (write Parquet) or `\"delete\"`\n 183→- `cleanup.directory`: Root directory for Parquet archive files (required when `mode` is `\"archive\"`)\n 184→- `nats-subscriptions`: List of NATS subjects to subscribe to, with associated cluster tag\n 185→\n 186→### Checkpoint formats\n 187→\n 188→The `checkpoints.file-format` field controls how in-memory data is persisted to disk.\n 189→\n 190→**`\"json\"` (default)** — human-readable JSON snapshots written periodically. Each\n 191→snapshot is stored as `<dir>/<cluster>/<host>/<timestamp>.json` and contains the\n 192→full metric hierarchy. Easy to inspect and recover manually, but larger on disk\n 193→and slower to write.\n 194→\n 195→**`\"wal\"`** — binary Write-Ahead Log format designed for crash safety. Two file\n 196→types are used per host:\n 197→\n 198→- `current.wal` — append-only binary log. Every incoming data point is appended\n 199→ immediately (magic `0xCC1DA7A1`, 4-byte CRC32 per record). Truncated trailing\n 200→ records from unclean shutdowns are silently skipped on restart.\n 201→- `<timestamp>.bin` — binary snapshot written at each checkpoint interval\n 202→ (magic `0xCC5B0001`). Contains the complete hierarchical metric state\n 203→ column-by-column. Written atomically via a `.tmp` rename.\n 204→\n 205→On startup the most recent `.bin` snapshot is loaded, then any remaining WAL\n 206→entries are replayed on top. The WAL is rotated (old file deleted, new one\n 207→started) after each successful snapshot.\n 208→\n 209→The `\"wal\"` option is the default and will be the only supported option in the\n 210→future. The `\"json\"` checkpoint format is still provided to migrate from\n 211→previous cc-metric-store version.\n 212→\n 213→### Parquet archive\n 214→\n 215→When `cleanup.mode` is `\"archive\"`, data that ages out of the in-memory\n 216→retention window is written to [Apache Parquet](https://parquet.apache.org/)\n 217→files before being freed. Files are organized as:\n 218→\n 219→```\n 220→<cleanup.directory>/\n 221→ <cluster>/\n 222→ <timestamp>.parquet\n 223→```\n 224→\n 225→One Parquet file is produced per cluster per cleanup run, consolidating all\n 226→hosts. Rows use a long (tidy) schema:\n 227→\n 228→| Column | Type | Description |\n 229→| ----------- | ------- | ----------------------------------------------------------------------- |\n 230→| `cluster` | string | Cluster name |\n 231→| `hostname` | string | Host name |\n 232→| `metric` | string | Metric name |\n 233→| `scope` | string | Hardware scope (`node`, `socket`, `core`, `hwthread`, `accelerator`, …) |\n 234→| `scope_id` | string | Numeric ID within the scope (e.g. `\"0\"`) |\n 235→| `timestamp` | int64 | Unix timestamp (seconds) |\n 236→| `frequency` | int64 | Sampling interval in seconds |\n 237→| `value` | float32 | Metric value |\n 238→\n 239→Files are compressed with Zstandard and sorted by `(cluster, hostname, metric,\n 240→timestamp)` for efficient columnar reads. The `cpu` prefix in the tree is\n 241→treated as an alias for `hwthread` scope.\n 242→\n 243→### `nats`\n 244→\n 245→```json\n 246→\"nats\": {\n 247→ \"address\": \"nats://0.0.0.0:4222\",\n 248→ \"username\": \"root\",\n 249→ \"password\": \"root\"\n 250→}\n 251→```\n 252→\n 253→NATS connection is optional. If not configured, only the HTTP write endpoint is available.\n 254→\n 255→For more information see the ClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-configuration/).\n 256→\n 257→## Test the complete setup (excluding cc-backend itself)\n 258→\n 259→There are two ways for sending data to the cc-metric-store, both of which are\n 260→supported by the\n 261→[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector).\n 262→This example uses NATS; the alternative is to use HTTP.\n 263→\n 264→```sh\n 265→# Only needed once, downloads the docker image\n 266→docker pull nats:latest\n 267→\n 268→# Start the NATS server\n 269→docker run -p 4222:4222 -ti nats:latest\n 270→```\n 271→\n 272→Second, build and start the\n 273→[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector)\n 274→using the following as Sink-Config:\n 275→\n 276→```json\n 277→{\n 278→ \"type\": \"nats\",\n 279→ \"host\": \"localhost\",\n 280→ \"port\": \"4222\",\n 281→ \"database\": \"updates\"\n 282→}\n 283→```\n 284→\n 285→Third, build and start the metric store. For this example here, the\n 286→`config.json` file already in the repository should work just fine.\n 287→\n 288→```sh\n 289→# Assuming you have a clone of this repo in ./cc-metric-store:\n 290→cd cc-metric-store\n 291→make\n 292→./cc-metric-store\n 293→```\n 294→\n 295→And finally, use the API to fetch some data. The API is protected by JWT based\n 296→authentication if `jwt-public-key` is set in `config.json`. You can use this JWT\n 297→for testing:\n 298→`REDACTED`\n 299→\n 300→```sh\n 301→JWT=\"REDACTED\"\n 302→\n 303→# If the collector and store and nats-server have been running for at least 60 seconds on the same host:\n 304→curl -H \"Authorization: Bearer $JWT\" \\\n 305→ \"http://localhost:8082/api/query/\" \\\n 306→ -d '{\n 307→ \"cluster\": \"testcluster\",\n 308→ \"from\": '\"$(expr $(date +%s) - 60)\"',\n 309→ \"to\": '\"$(date +%s)\"',\n 310→ \"queries\": [{ \"metric\": \"cpu_load\", \"host\": \"'\"$(hostname)\"'\" }]\n 311→ }'\n 312→```\n 313→\n 314→For debugging, the debug endpoint dumps the current content to stdout:\n 315→\n 316→```sh\n 317→JWT=\"REDACTED\"\n 318→\n 319→# Dump everything\n 320→curl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/\"\n 321→\n 322→# Dump a specific selector (colon-separated path)\n 323→curl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/?selector=testcluster:host1\"\n 324→```\n 325→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"3d005549-c854-49c0-84f1-aa9df70196d9","timestamp":"2026-04-01T13:18:37.109Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md","content":"# ClusterCockpit Metric Store\n\n[![Build & Test](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml/badge.svg)](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml)\n\nThe cc-metric-store provides a simple in-memory time series database for storing\nmetrics of cluster nodes at preconfigured intervals. It is meant to be used as\npart of the [ClusterCockpit suite](https://github.com/ClusterCockpit). As all\ndata is kept in-memory, accessing it is very fast. It also provides topology aware\naggregations over time _and_ nodes/sockets/cpus.\n\nThe storage engine is provided by the\n[cc-backend](https://github.com/ClusterCockpit/cc-backend) package\n(`cc-backend/pkg/metricstore`). This repository provides the HTTP API wrapper.\n\nThe [NATS.io](https://nats.io/) based writing endpoint and the HTTP write\nendpoint both consume messages in [this format of the InfluxDB line\nprotocol](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md).\n\n## Building\n\n`cc-metric-store` can be built using the provided `Makefile`.\nIt supports the following targets:\n\n- `make`: Build the application, copy an example configuration file and generate\n checkpoint folders if required.\n- `make clean`: Clean the golang build cache and application binary\n- `make distclean`: In addition to the clean target also remove the `./var`\n folder and `config.json`\n- `make swagger`: Regenerate the Swagger files from the source comments.\n- `make test`: Run tests and basic checks (`go build`, `go vet`, `go test`).\n\n## Running\n\n```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n```\n\n## REST API Endpoints\n\nThe REST API is documented in [swagger.json](./api/swagger.json). You can\nexplore and try the REST API using the integrated [SwaggerUI web\ninterface](http://localhost:8082/swagger/) (requires the `-dev` flag).\n\nFor more information on the `cc-metric-store` REST API have a look at the\nClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-rest-api/).\n\nAll endpoints support both trailing-slash and non-trailing-slash variants:\n\n| Method | Path | Description |\n| ------ | ------------------- | -------------------------------------- |\n| `GET` | `/api/query/` | Query metrics with selectors |\n| `POST` | `/api/write/` | Write metrics (InfluxDB line protocol) |\n| `POST` | `/api/free/` | Free buffers up to a timestamp |\n| `GET` | `/api/debug/` | Dump internal state |\n| `GET` | `/api/healthcheck/` | Check node health status |\n\nIf `jwt-public-key` is set in `config.json`, all endpoints require JWT\nauthentication using an Ed25519 key (`Authorization: Bearer <token>`).\n\n## Run tests\n\nSome benchmarks concurrently access the `MemoryStore`, so enabling the\n[Race Detector](https://golang.org/doc/articles/race_detector) might be useful.\nThe benchmarks also work as tests as they do check if the returned values are as\nexpected.\n\n```sh\n# Tests only\ngo test -v ./...\n\n# Benchmarks as well\ngo test -bench=. -race -v ./...\n```\n\n## What are these selectors mentioned in the code?\n\nThe cc-metric-store works as a time-series database and uses the InfluxDB line\nprotocol as input format. Unlike InfluxDB, the data is indexed by one single\nstrictly hierarchical tree structure. A selector is built out of the tags in the\nInfluxDB line protocol, and can be used to select a node (not in the sense of a\ncompute node, can also be a socket, cpu, ...) in that tree. The implementation\ncalls those nodes `level` to avoid confusion. It is impossible to access data\nonly by knowing the _socket_ or _cpu_ tag — all higher up levels have to be\nspecified as well.\n\nThis is what the hierarchy currently looks like:\n\n- cluster1\n - host1\n - socket0\n - socket1\n - ...\n - cpu1\n - cpu2\n - cpu3\n - cpu4\n - ...\n - gpu1\n - gpu2\n - host2\n - ...\n- cluster2\n- ...\n\nExample selectors:\n\n1. `[\"cluster1\", \"host1\", \"cpu0\"]`: Select only the cpu0 of host1 in cluster1\n2. `[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\", \"cpu6\", \"cpu7\"]]`: Select only CPUs 4-7 of host1 in cluster1\n3. `[\"cluster1\", \"host1\"]`: Select the complete node. If querying for a CPU-specific metric such as flops, all CPUs are implied\n\n## Config file\n\nThe config file is a JSON document with four top-level sections.\n\n### `main`\n\n```json\n\"main\": {\n \"addr\": \"0.0.0.0:8082\",\n \"https-cert-file\": \"\",\n \"https-key-file\": \"\",\n \"jwt-public-key\": \"<base64-encoded Ed25519 public key>\",\n \"user\": \"\",\n \"group\": \"\",\n \"backend-url\": \"\"\n}\n```\n\n- `addr`: Address and port to listen on (default: `0.0.0.0:8082`)\n- `https-cert-file` / `https-key-file`: Paths to TLS certificate/key for HTTPS\n- `jwt-public-key`: Base64-encoded Ed25519 public key for JWT authentication. If empty, no auth is required.\n- `user` / `group`: Drop privileges to this user/group after startup\n- `backend-url`: Optional URL of a cc-backend instance used as node provider\n\n### `metrics`\n\nPer-metric configuration. Each key is the metric name:\n\n```json\n\"metrics\": {\n \"cpu_load\": { \"frequency\": 60, \"aggregation\": null },\n \"flops_any\": { \"frequency\": 60, \"aggregation\": \"sum\" },\n \"cpu_user\": { \"frequency\": 60, \"aggregation\": \"avg\" }\n}\n```\n\n- `frequency`: Sampling interval in seconds\n- `aggregation`: How to aggregate sub-level data: `\"sum\"`, `\"avg\"`, or `null` (no aggregation)\n\n### `metric-store`\n\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"file-format\": \"wal\",\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"24h\",\n \"num-workers\": 0,\n \"cleanup\": {\n \"mode\": \"archive\",\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [\n { \"subscribe-to\": \"hpc-nats\", \"cluster-tag\": \"fritz\" }\n ]\n}\n```\n\n- `checkpoints.file-format`: Checkpoint format: `\"json\"` (default, human-readable) or `\"wal\"` (binary WAL, crash-safe). See [Checkpoint formats](#checkpoint-formats) below.\n- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n- `memory-cap`: Approximate memory cap in MB for metric buffers\n- `retention-in-memory`: How long to keep data in memory (e.g. `\"48h\"`)\n- `num-workers`: Number of parallel workers for checkpoint/archive I/O (0 = auto, capped at 10)\n- `cleanup.mode`: What to do with data older than `retention-in-memory`: `\"archive\"` (write Parquet) or `\"delete\"`\n- `cleanup.directory`: Root directory for Parquet archive files (required when `mode` is `\"archive\"`)\n- `nats-subscriptions`: List of NATS subjects to subscribe to, with associated cluster tag\n\n### Checkpoint formats\n\nThe `checkpoints.file-format` field controls how in-memory data is persisted to disk.\n\n**`\"json\"` (default)** — human-readable JSON snapshots written periodically. Each\nsnapshot is stored as `<dir>/<cluster>/<host>/<timestamp>.json` and contains the\nfull metric hierarchy. Easy to inspect and recover manually, but larger on disk\nand slower to write.\n\n**`\"wal\"`** — binary Write-Ahead Log format designed for crash safety. Two file\ntypes are used per host:\n\n- `current.wal` — append-only binary log. Every incoming data point is appended\n immediately (magic `0xCC1DA7A1`, 4-byte CRC32 per record). Truncated trailing\n records from unclean shutdowns are silently skipped on restart.\n- `<timestamp>.bin` — binary snapshot written at each checkpoint interval\n (magic `0xCC5B0001`). Contains the complete hierarchical metric state\n column-by-column. Written atomically via a `.tmp` rename.\n\nOn startup the most recent `.bin` snapshot is loaded, then any remaining WAL\nentries are replayed on top. The WAL is rotated (old file deleted, new one\nstarted) after each successful snapshot.\n\nThe `\"wal\"` option is the default and will be the only supported option in the\nfuture. The `\"json\"` checkpoint format is still provided to migrate from\nprevious cc-metric-store version.\n\n### Parquet archive\n\nWhen `cleanup.mode` is `\"archive\"`, data that ages out of the in-memory\nretention window is written to [Apache Parquet](https://parquet.apache.org/)\nfiles before being freed. Files are organized as:\n\n```\n<cleanup.directory>/\n <cluster>/\n <timestamp>.parquet\n```\n\nOne Parquet file is produced per cluster per cleanup run, consolidating all\nhosts. Rows use a long (tidy) schema:\n\n| Column | Type | Description |\n| ----------- | ------- | ----------------------------------------------------------------------- |\n| `cluster` | string | Cluster name |\n| `hostname` | string | Host name |\n| `metric` | string | Metric name |\n| `scope` | string | Hardware scope (`node`, `socket`, `core`, `hwthread`, `accelerator`, …) |\n| `scope_id` | string | Numeric ID within the scope (e.g. `\"0\"`) |\n| `timestamp` | int64 | Unix timestamp (seconds) |\n| `frequency` | int64 | Sampling interval in seconds |\n| `value` | float32 | Metric value |\n\nFiles are compressed with Zstandard and sorted by `(cluster, hostname, metric,\ntimestamp)` for efficient columnar reads. The `cpu` prefix in the tree is\ntreated as an alias for `hwthread` scope.\n\n### `nats`\n\n```json\n\"nats\": {\n \"address\": \"nats://0.0.0.0:4222\",\n \"username\": \"root\",\n \"password\": \"root\"\n}\n```\n\nNATS connection is optional. If not configured, only the HTTP write endpoint is available.\n\nFor more information see the ClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-configuration/).\n\n## Test the complete setup (excluding cc-backend itself)\n\nThere are two ways for sending data to the cc-metric-store, both of which are\nsupported by the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector).\nThis example uses NATS; the alternative is to use HTTP.\n\n```sh\n# Only needed once, downloads the docker image\ndocker pull nats:latest\n\n# Start the NATS server\ndocker run -p 4222:4222 -ti nats:latest\n```\n\nSecond, build and start the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector)\nusing the following as Sink-Config:\n\n```json\n{\n \"type\": \"nats\",\n \"host\": \"localhost\",\n \"port\": \"4222\",\n \"database\": \"updates\"\n}\n```\n\nThird, build and start the metric store. For this example here, the\n`config.json` file already in the repository should work just fine.\n\n```sh\n# Assuming you have a clone of this repo in ./cc-metric-store:\ncd cc-metric-store\nmake\n./cc-metric-store\n```\n\nAnd finally, use the API to fetch some data. The API is protected by JWT based\nauthentication if `jwt-public-key` is set in `config.json`. You can use this JWT\nfor testing:\n`REDACTED`\n\n```sh\nJWT=\"REDACTED\"\n\n# If the collector and store and nats-server have been running for at least 60 seconds on the same host:\ncurl -H \"Authorization: Bearer $JWT\" \\\n \"http://localhost:8082/api/query/\" \\\n -d '{\n \"cluster\": \"testcluster\",\n \"from\": '\"$(expr $(date +%s) - 60)\"',\n \"to\": '\"$(date +%s)\"',\n \"queries\": [{ \"metric\": \"cpu_load\", \"host\": \"'\"$(hostname)\"'\" }]\n }'\n```\n\nFor debugging, the debug endpoint dumps the current content to stdout:\n\n```sh\nJWT=\"REDACTED\"\n\n# Dump everything\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/\"\n\n# Dump a specific selector (colon-separated path)\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/?selector=testcluster:host1\"\n```\n","numLines":325,"startLine":1,"totalLines":325}},"sourceToolAssistantUUID":"c10aab67-f8f0-4b00-a028-887e7f1ef837","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides an efficient in-memory time-series metric storage system\n 7→// with support for hierarchical data organization, checkpointing, and archiving.\n 8→//\n 9→// The package organizes metrics in a tree structure (cluster → host → component) and\n 10→// provides concurrent read/write access to metric data with configurable aggregation strategies.\n 11→// Background goroutines handle periodic checkpointing (JSON or WAL/binary format), archiving old data,\n 12→// and enforcing retention policies.\n 13→//\n 14→// Key features:\n 15→// - In-memory metric storage with configurable retention\n 16→// - Hierarchical data organization (selectors)\n 17→// - Concurrent checkpoint/archive workers\n 18→// - Support for sum and average aggregation\n 19→// - NATS integration for metric ingestion via InfluxDB line protocol\n 20→package metricstore\n 21→\n 22→import (\n 23→\t\"bytes\"\n 24→\t\"context\"\n 25→\t\"encoding/json\"\n 26→\t\"errors\"\n 27→\t\"fmt\"\n 28→\t\"runtime\"\n 29→\t\"runtime/debug\"\n 30→\t\"slices\"\n 31→\t\"sync\"\n 32→\t\"time\"\n 33→\n 34→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n 35→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 36→\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n 37→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 38→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 39→)\n 40→\n 41→// GlobalState holds the global state for the metric store with thread-safe access.\n 42→type GlobalState struct {\n 43→\tmu sync.RWMutex\n 44→\tlastRetentionTime int64\n 45→\tselectorsExcluded bool\n 46→}\n 47→\n 48→var (\n 49→\tsingleton sync.Once\n 50→\tmsInstance *MemoryStore\n 51→\t// shutdownFunc stores the context cancellation function created in Init\n 52→\t// and is called during Shutdown to cancel all background goroutines\n 53→\tshutdownFunc context.CancelFunc\n 54→\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n 55→\t// Create a global instance\n 56→\tstate = &GlobalState{}\n 57→)\n 58→\n 59→// NodeProvider provides information about nodes currently in use by running jobs.\n 60→//\n 61→// This interface allows metricstore to query job information without directly\n 62→// depending on the repository package, breaking the import cycle.\n 63→//\n 64→// Implementations should return nodes that are actively processing jobs started\n 65→// before the given timestamp. These nodes will be excluded from retention-based\n 66→// garbage collection to prevent data loss for jobs that are still running or\n 67→// recently completed.\n 68→type NodeProvider interface {\n 69→\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n 70→\t// that are currently in use by jobs that started before the given timestamp.\n 71→\t//\n 72→\t// Parameters:\n 73→\t// - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n 74→\t//\n 75→\t// Returns:\n 76→\t// - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n 77→\t// - Error if the query fails\n 78→\tGetUsedNodes(ts int64) (map[string][]string, error)\n 79→}\n 80→\n 81→// Metric represents a single metric data point to be written to the store.\n 82→type Metric struct {\n 83→\tName string\n 84→\tValue schema.Float\n 85→\t// MetricConfig contains frequency and aggregation settings for this metric.\n 86→\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n 87→\tMetricConfig MetricConfig\n 88→}\n 89→\n 90→// MemoryStore is the main in-memory time-series metric storage implementation.\n 91→//\n 92→// It organizes metrics in a hierarchical tree structure where each level represents\n 93→// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n 94→// store multiple metrics as time-series buffers.\n 95→//\n 96→// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n 97→// All public methods are safe for concurrent use.\n 98→type MemoryStore struct {\n 99→\tMetrics map[string]MetricConfig\n 100→\troot Level\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"e00ce570-1f6c-401d-9e75-104035c9ae7c","timestamp":"2026-04-01T13:18:54.879Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package metricstore provides an efficient in-memory time-series metric storage system\n// with support for hierarchical data organization, checkpointing, and archiving.\n//\n// The package organizes metrics in a tree structure (cluster → host → component) and\n// provides concurrent read/write access to metric data with configurable aggregation strategies.\n// Background goroutines handle periodic checkpointing (JSON or WAL/binary format), archiving old data,\n// and enforcing retention policies.\n//\n// Key features:\n// - In-memory metric storage with configurable retention\n// - Hierarchical data organization (selectors)\n// - Concurrent checkpoint/archive workers\n// - Support for sum and average aggregation\n// - NATS integration for metric ingestion via InfluxDB line protocol\npackage metricstore\n\nimport (\n\t\"bytes\"\n\t\"context\"\n\t\"encoding/json\"\n\t\"errors\"\n\t\"fmt\"\n\t\"runtime\"\n\t\"runtime/debug\"\n\t\"slices\"\n\t\"sync\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n)\n\n// GlobalState holds the global state for the metric store with thread-safe access.\ntype GlobalState struct {\n\tmu sync.RWMutex\n\tlastRetentionTime int64\n\tselectorsExcluded bool\n}\n\nvar (\n\tsingleton sync.Once\n\tmsInstance *MemoryStore\n\t// shutdownFunc stores the context cancellation function created in Init\n\t// and is called during Shutdown to cancel all background goroutines\n\tshutdownFunc context.CancelFunc\n\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n\t// Create a global instance\n\tstate = &GlobalState{}\n)\n\n// NodeProvider provides information about nodes currently in use by running jobs.\n//\n// This interface allows metricstore to query job information without directly\n// depending on the repository package, breaking the import cycle.\n//\n// Implementations should return nodes that are actively processing jobs started\n// before the given timestamp. These nodes will be excluded from retention-based\n// garbage collection to prevent data loss for jobs that are still running or\n// recently completed.\ntype NodeProvider interface {\n\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n\t// that are currently in use by jobs that started before the given timestamp.\n\t//\n\t// Parameters:\n\t// - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n\t//\n\t// Returns:\n\t// - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n\t// - Error if the query fails\n\tGetUsedNodes(ts int64) (map[string][]string, error)\n}\n\n// Metric represents a single metric data point to be written to the store.\ntype Metric struct {\n\tName string\n\tValue schema.Float\n\t// MetricConfig contains frequency and aggregation settings for this metric.\n\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n\tMetricConfig MetricConfig\n}\n\n// MemoryStore is the main in-memory time-series metric storage implementation.\n//\n// It organizes metrics in a hierarchical tree structure where each level represents\n// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n// store multiple metrics as time-series buffers.\n//\n// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n// All public methods are safe for concurrent use.\ntype MemoryStore struct {\n\tMetrics map[string]MetricConfig\n\troot Level","numLines":100,"startLine":1,"totalLines":815}},"sourceToolAssistantUUID":"dfcc438e-0c57-4625-9ba1-b4eea3f71192","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"dde7d7ea-23eb-4b0e-9079-376eb0beeac6","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015TQvizFXQLtZXhQmPrzwk2","type":"tool_result","content":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go:66: \"memory-cap\": {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go:89: \"required\": [\"retention-in-memory\", \"memory-cap\"]\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:447:\t\t\t\tif actualMemoryGB > float64(Keys.MemoryCap) {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:448:\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> memory usage %.2f GB exceeds cap %d GB, starting emergency buffer freeing\", actualMemoryGB, Keys.MemoryCap)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:470:\t\t\t\t\t\t\tif actualMemoryGB < float64(Keys.MemoryCap) {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:482:\t\t\t\t\tif actualMemoryGB >= float64(Keys.MemoryCap) {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:483:\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> after emergency frees (%d buffers), memory usage %.2f GB still at/above cap %d GB\", freedEmergency, actualMemoryGB, Keys.MemoryCap)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:490:\t\t\t\tmemoryRatio := actualMemoryGB / float64(Keys.MemoryCap)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go:15://\t├─ MemoryCap: Memory limit in bytes (triggers forceFree)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go:119:// - MemoryCap: Max memory in GB for buffer data (0 = unlimited); triggers forceFree when exceeded\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go:130:\tMemoryCap int `json:\"memory-cap\"`"}]},"uuid":"c704aba2-fb9c-4bd3-a873-c3db18abe9bb","timestamp":"2026-04-01T13:18:55.463Z","toolUseResult":{"mode":"content","numFiles":0,"filenames":[],"content":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go:66: \"memory-cap\": {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go:89: \"required\": [\"retention-in-memory\", \"memory-cap\"]\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:447:\t\t\t\tif actualMemoryGB > float64(Keys.MemoryCap) {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:448:\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> memory usage %.2f GB exceeds cap %d GB, starting emergency buffer freeing\", actualMemoryGB, Keys.MemoryCap)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:470:\t\t\t\t\t\t\tif actualMemoryGB < float64(Keys.MemoryCap) {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:482:\t\t\t\t\tif actualMemoryGB >= float64(Keys.MemoryCap) {\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:483:\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> after emergency frees (%d buffers), memory usage %.2f GB still at/above cap %d GB\", freedEmergency, actualMemoryGB, Keys.MemoryCap)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go:490:\t\t\t\tmemoryRatio := actualMemoryGB / float64(Keys.MemoryCap)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go:15://\t├─ MemoryCap: Memory limit in bytes (triggers forceFree)\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go:119:// - MemoryCap: Max memory in GB for buffer data (0 = unlimited); triggers forceFree when exceeded\n/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go:130:\tMemoryCap int `json:\"memory-cap\"`","numLines":11},"sourceToolAssistantUUID":"dde7d7ea-23eb-4b0e-9079-376eb0beeac6","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"7f765890-98da-4b1a-8703-94d79491a6b1","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01PGCME6wCLudKyxkmCqaGNh","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package metricstore\n 7→\n 8→const configSchema = `{\n 9→ \"type\": \"object\",\n 10→ \"description\": \"Configuration specific to built-in metric-store.\",\n 11→ \"properties\": {\n 12→ \"num-workers\": {\n 13→ \"description\": \"Number of concurrent workers for checkpoint and archive operations\",\n 14→ \"type\": \"integer\"\n 15→ },\n 16→ \"checkpoints\": {\n 17→ \"description\": \"Configuration for checkpointing the metrics buffers\",\n 18→ \"type\": \"object\",\n 19→ \"properties\": {\n 20→ \"file-format\": {\n 21→ \"description\": \"Specify the format for checkpoint files. Two variants: 'json' (human-readable, periodic) and 'wal' (binary snapshot + Write-Ahead Log, crash-safe). Default is 'wal'.\",\n 22→ \"type\": \"string\"\n 23→ },\n 24→ \"directory\": {\n 25→ \"description\": \"Path in which the checkpointed files should be placed.\",\n 26→ \"type\": \"string\"\n 27→ },\n 28→ \"max-wal-size\": {\n 29→ \"description\": \"Maximum size in bytes for a single host's WAL file. When exceeded the WAL is force-rotated to prevent unbounded disk growth. Only applies when file-format is 'wal'. 0 means unlimited (default).\",\n 30→ \"type\": \"integer\",\n 31→ \"minimum\": 0\n 32→ }\n 33→ }\n 34→ },\n 35→ \"cleanup\": {\n 36→ \"description\": \"Configuration for the cleanup process. The cleanup interval is always 'retention-in-memory'.\",\n 37→ \"type\": \"object\",\n 38→ \"properties\": {\n 39→ \"mode\": {\n 40→ \"description\": \"The operation mode (e.g., 'archive' or 'delete').\",\n 41→ \"type\": \"string\",\n 42→ \"enum\": [\"archive\", \"delete\"]\n 43→ },\n 44→ \"directory\": {\n 45→ \"description\": \"Target directory for archive operations.\",\n 46→ \"type\": \"string\"\n 47→ }\n 48→ },\n 49→ \"if\": {\n 50→ \"properties\": {\n 51→ \"mode\": { \"const\": \"archive\" }\n 52→ }\n 53→ },\n 54→ \"then\": {\n 55→ \"required\": [\"directory\"]\n 56→ }\n 57→ },\n 58→ \"retention-in-memory\": {\n 59→ \"description\": \"Keep the metrics within memory for given time interval. Retention for X hours, then the metrics would be freed.\",\n 60→ \"type\": \"string\"\n 61→ },\n 62→ \"checkpoint-interval\": {\n 63→ \"description\": \"Interval between checkpoints as a Go duration string (e.g., '12h', '6h', '30m'). Default is '12h'.\",\n 64→ \"type\": \"string\"\n 65→ },\n 66→ \"memory-cap\": {\n 67→ \"description\": \"Upper memory capacity limit used by metricstore in GB\",\n 68→ \"type\": \"integer\"\n 69→ },\n 70→ \"nats-subscriptions\": {\n 71→ \"description\": \"Array of various subscriptions. Allows to subscribe to different subjects and publishers.\",\n 72→ \"type\": \"array\",\n 73→ \"items\": {\n 74→ \"type\": \"object\",\n 75→ \"properties\": {\n 76→ \"subscribe-to\": {\n 77→ \"description\": \"Subject name\",\n 78→ \"type\": \"string\"\n 79→ },\n 80→ \"cluster-tag\": {\n 81→ \"description\": \"Optional: Allow lines without a cluster tag, use this as default\",\n 82→ \"type\": \"string\"\n 83→ }\n 84→ },\n 85→\t\t\t\t\"required\": [\"subscribe-to\"]\n 86→ }\n 87→ }\n 88→ },\n 89→ \"required\": [\"retention-in-memory\", \"memory-cap\"]\n 90→}`\n 91→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"8556a98c-6980-4f5e-b5a8-bcdb4de5e836","timestamp":"2026-04-01T13:18:59.991Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage metricstore\n\nconst configSchema = `{\n \"type\": \"object\",\n \"description\": \"Configuration specific to built-in metric-store.\",\n \"properties\": {\n \"num-workers\": {\n \"description\": \"Number of concurrent workers for checkpoint and archive operations\",\n \"type\": \"integer\"\n },\n \"checkpoints\": {\n \"description\": \"Configuration for checkpointing the metrics buffers\",\n \"type\": \"object\",\n \"properties\": {\n \"file-format\": {\n \"description\": \"Specify the format for checkpoint files. Two variants: 'json' (human-readable, periodic) and 'wal' (binary snapshot + Write-Ahead Log, crash-safe). Default is 'wal'.\",\n \"type\": \"string\"\n },\n \"directory\": {\n \"description\": \"Path in which the checkpointed files should be placed.\",\n \"type\": \"string\"\n },\n \"max-wal-size\": {\n \"description\": \"Maximum size in bytes for a single host's WAL file. When exceeded the WAL is force-rotated to prevent unbounded disk growth. Only applies when file-format is 'wal'. 0 means unlimited (default).\",\n \"type\": \"integer\",\n \"minimum\": 0\n }\n }\n },\n \"cleanup\": {\n \"description\": \"Configuration for the cleanup process. The cleanup interval is always 'retention-in-memory'.\",\n \"type\": \"object\",\n \"properties\": {\n \"mode\": {\n \"description\": \"The operation mode (e.g., 'archive' or 'delete').\",\n \"type\": \"string\",\n \"enum\": [\"archive\", \"delete\"]\n },\n \"directory\": {\n \"description\": \"Target directory for archive operations.\",\n \"type\": \"string\"\n }\n },\n \"if\": {\n \"properties\": {\n \"mode\": { \"const\": \"archive\" }\n }\n },\n \"then\": {\n \"required\": [\"directory\"]\n }\n },\n \"retention-in-memory\": {\n \"description\": \"Keep the metrics within memory for given time interval. Retention for X hours, then the metrics would be freed.\",\n \"type\": \"string\"\n },\n \"checkpoint-interval\": {\n \"description\": \"Interval between checkpoints as a Go duration string (e.g., '12h', '6h', '30m'). Default is '12h'.\",\n \"type\": \"string\"\n },\n \"memory-cap\": {\n \"description\": \"Upper memory capacity limit used by metricstore in GB\",\n \"type\": \"integer\"\n },\n \"nats-subscriptions\": {\n \"description\": \"Array of various subscriptions. Allows to subscribe to different subjects and publishers.\",\n \"type\": \"array\",\n \"items\": {\n \"type\": \"object\",\n \"properties\": {\n \"subscribe-to\": {\n \"description\": \"Subject name\",\n \"type\": \"string\"\n },\n \"cluster-tag\": {\n \"description\": \"Optional: Allow lines without a cluster tag, use this as default\",\n \"type\": \"string\"\n }\n },\n\t\t\t\t\"required\": [\"subscribe-to\"]\n }\n }\n },\n \"required\": [\"retention-in-memory\", \"memory-cap\"]\n}`\n","numLines":91,"startLine":1,"totalLines":91}},"sourceToolAssistantUUID":"7f765890-98da-4b1a-8703-94d79491a6b1","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"356967f5-77c0-4692-8bd4-650c4b366ba8","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01SMW83i6F28qV5TTa55CCcV","type":"message","role":"assistant","content":[{"type":"text","text":"Now I have enough information to plan. Let me write the plan."}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1426,"cache_read_input_tokens":43627,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":1426},"output_tokens":29,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd7nRyK45Zk26iqB1xcz","type":"assistant","uuid":"324e2ed4-cfad-4eff-884f-6664dc80e3bf","timestamp":"2026-04-01T13:19:39.228Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"324e2ed4-cfad-4eff-884f-6664dc80e3bf","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01SMW83i6F28qV5TTa55CCcV","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_012tyLU15oGSqm8eqXeG2WiA","name":"Write","input":{"file_path":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md","content":"# Plan: Sync metric-store config and docs with cc-backend\n\n## Context\n\nThe `MetricStoreConfig` struct in `cc-backend/pkg/metricstore/config.go` has evolved. The\ncc-metric-store's config template and documentation are out of sync. Specifically:\n\n1. `checkpoints.interval` was moved to a top-level `checkpoint-interval` field\n2. `cleanup.interval` was removed (now derived from `retention-in-memory`)\n3. A new `checkpoints.file-format` field (`\"json\"` or `\"wal\"`) was added; `\"wal\"` is now the default\n4. New optional fields: `num-workers`, `checkpoints.max-wal-size`\n5. README incorrectly says `memory-cap` is in MB (it's GB)\n6. README incorrectly labels `\"json\"` as the default checkpoint format (it's `\"wal\"`)\n\n## Files to change\n\n### 1. `configs/config.json`\n\nCurrent broken `metric-store` section:\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"interval\": \"12h\", ← INVALID field (moved to top-level)\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"48h\",\n \"cleanup\": {\n \"mode\": \"archive\",\n \"interval\": \"48h\", ← INVALID field (derived from retention-in-memory)\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [...]\n}\n```\n\nFix:\n- Remove `checkpoints.interval`\n- Remove `cleanup.interval`\n- Add `checkpoints.file-format: \"wal\"`\n- Add top-level `checkpoint-interval: \"12h\"`\n\n### 2. `README.md`\n\nTwo description bugs (the example JSON block is already correct):\n\n- Line ~180: `memory-cap` description says \"MB\" → fix to \"GB\"\n- Line ~177: `checkpoints.file-format` says `\"json\"` (default) → fix to `\"wal\"` (default)\n- \"Checkpoint formats\" section: `**\\`\"json\"\\` (default)**` header → remove `(default)`, and `**\\`\"wal\"\\`**` → add `(default)` to WAL header\n\n### 3. `CLAUDE.md`\n\nUpdate `metric-store` config description to reflect:\n- `checkpoint-interval` as top-level field (no longer inside `checkpoints`)\n- WAL format as the default\n- Removal of `cleanup.interval` (derived)\n- New fields: `num-workers`, `checkpoints.file-format`, `checkpoints.max-wal-size`\n\n## Critical files\n\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md`\n\nReference (read-only):\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` — authoritative struct\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go` — authoritative JSON schema\n\n## Verification\n\n- `go build ./...` in cc-metric-store (config is only read at runtime, but build confirms no breakage)\n- Manually inspect that `configs/config.json` passes the schema from `configSchema.go` (no unknown fields)\n- Review README render for correctness\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1426,"cache_read_input_tokens":43627,"output_tokens":3234,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1426,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd7nRyK45Zk26iqB1xcz","type":"assistant","uuid":"dc6dc4d6-6b85-46af-9679-7180661e83c4","timestamp":"2026-04-01T13:19:53.166Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"dc6dc4d6-6b85-46af-9679-7180661e83c4","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Write","command":"callback"},"parentToolUseID":"toolu_012tyLU15oGSqm8eqXeG2WiA","toolUseID":"toolu_012tyLU15oGSqm8eqXeG2WiA","timestamp":"2026-04-01T13:19:53.179Z","uuid":"bc766a77-2701-4121-a8a8-700d99c486ba","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"dc6dc4d6-6b85-46af-9679-7180661e83c4","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_012tyLU15oGSqm8eqXeG2WiA","type":"tool_result","content":"File created successfully at: /Users/jan/.claude/plans/stateful-frolicking-jellyfish.md"}]},"uuid":"a00c3934-5d88-4051-815e-86320d069d9c","timestamp":"2026-04-01T13:19:53.179Z","toolUseResult":{"type":"create","filePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md","content":"# Plan: Sync metric-store config and docs with cc-backend\n\n## Context\n\nThe `MetricStoreConfig` struct in `cc-backend/pkg/metricstore/config.go` has evolved. The\ncc-metric-store's config template and documentation are out of sync. Specifically:\n\n1. `checkpoints.interval` was moved to a top-level `checkpoint-interval` field\n2. `cleanup.interval` was removed (now derived from `retention-in-memory`)\n3. A new `checkpoints.file-format` field (`\"json\"` or `\"wal\"`) was added; `\"wal\"` is now the default\n4. New optional fields: `num-workers`, `checkpoints.max-wal-size`\n5. README incorrectly says `memory-cap` is in MB (it's GB)\n6. README incorrectly labels `\"json\"` as the default checkpoint format (it's `\"wal\"`)\n\n## Files to change\n\n### 1. `configs/config.json`\n\nCurrent broken `metric-store` section:\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"interval\": \"12h\", ← INVALID field (moved to top-level)\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"48h\",\n \"cleanup\": {\n \"mode\": \"archive\",\n \"interval\": \"48h\", ← INVALID field (derived from retention-in-memory)\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [...]\n}\n```\n\nFix:\n- Remove `checkpoints.interval`\n- Remove `cleanup.interval`\n- Add `checkpoints.file-format: \"wal\"`\n- Add top-level `checkpoint-interval: \"12h\"`\n\n### 2. `README.md`\n\nTwo description bugs (the example JSON block is already correct):\n\n- Line ~180: `memory-cap` description says \"MB\" → fix to \"GB\"\n- Line ~177: `checkpoints.file-format` says `\"json\"` (default) → fix to `\"wal\"` (default)\n- \"Checkpoint formats\" section: `**\\`\"json\"\\` (default)**` header → remove `(default)`, and `**\\`\"wal\"\\`**` → add `(default)` to WAL header\n\n### 3. `CLAUDE.md`\n\nUpdate `metric-store` config description to reflect:\n- `checkpoint-interval` as top-level field (no longer inside `checkpoints`)\n- WAL format as the default\n- Removal of `cleanup.interval` (derived)\n- New fields: `num-workers`, `checkpoints.file-format`, `checkpoints.max-wal-size`\n\n## Critical files\n\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md`\n\nReference (read-only):\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` — authoritative struct\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go` — authoritative JSON schema\n\n## Verification\n\n- `go build ./...` in cc-metric-store (config is only read at runtime, but build confirms no breakage)\n- Manually inspect that `configs/config.json` passes the schema from `configSchema.go` (no unknown fields)\n- Review README render for correctness\n","structuredPatch":[],"originalFile":null},"sourceToolAssistantUUID":"dc6dc4d6-6b85-46af-9679-7180661e83c4","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"809607fe-2641-4c70-b2ef-73f266e15f3c","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01ACkAhdcWw7QUQwjuhGAaB5","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01UMKkakigZ9GU2Fo7BgHX8n","name":"ExitPlanMode","input":{"allowedPrompts":[{"tool":"Bash","prompt":"run go build to verify no breakage"}],"plan":"# Plan: Sync metric-store config and docs with cc-backend\n\n## Context\n\nThe `MetricStoreConfig` struct in `cc-backend/pkg/metricstore/config.go` has evolved. The\ncc-metric-store's config template and documentation are out of sync. Specifically:\n\n1. `checkpoints.interval` was moved to a top-level `checkpoint-interval` field\n2. `cleanup.interval` was removed (now derived from `retention-in-memory`)\n3. A new `checkpoints.file-format` field (`\"json\"` or `\"wal\"`) was added; `\"wal\"` is now the default\n4. New optional fields: `num-workers`, `checkpoints.max-wal-size`\n5. README incorrectly says `memory-cap` is in MB (it's GB)\n6. README incorrectly labels `\"json\"` as the default checkpoint format (it's `\"wal\"`)\n\n## Files to change\n\n### 1. `configs/config.json`\n\nCurrent broken `metric-store` section:\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"interval\": \"12h\", ← INVALID field (moved to top-level)\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"48h\",\n \"cleanup\": {\n \"mode\": \"archive\",\n \"interval\": \"48h\", ← INVALID field (derived from retention-in-memory)\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [...]\n}\n```\n\nFix:\n- Remove `checkpoints.interval`\n- Remove `cleanup.interval`\n- Add `checkpoints.file-format: \"wal\"`\n- Add top-level `checkpoint-interval: \"12h\"`\n\n### 2. `README.md`\n\nTwo description bugs (the example JSON block is already correct):\n\n- Line ~180: `memory-cap` description says \"MB\" → fix to \"GB\"\n- Line ~177: `checkpoints.file-format` says `\"json\"` (default) → fix to `\"wal\"` (default)\n- \"Checkpoint formats\" section: `**\\`\"json\"\\` (default)**` header → remove `(default)`, and `**\\`\"wal\"\\`**` → add `(default)` to WAL header\n\n### 3. `CLAUDE.md`\n\nUpdate `metric-store` config description to reflect:\n- `checkpoint-interval` as top-level field (no longer inside `checkpoints`)\n- WAL format as the default\n- Removal of `cleanup.interval` (derived)\n- New fields: `num-workers`, `checkpoints.file-format`, `checkpoints.max-wal-size`\n\n## Critical files\n\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md`\n\nReference (read-only):\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` — authoritative struct\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go` — authoritative JSON schema\n\n## Verification\n\n- `go build ./...` in cc-metric-store (config is only read at runtime, but build confirms no breakage)\n- Manually inspect that `configs/config.json` passes the schema from `configSchema.go` (no unknown fields)\n- Review README render for correctness\n","planFilePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":738,"cache_read_input_tokens":48324,"output_tokens":79,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":738,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd7raPgcCbiKSMnfm4D4","type":"assistant","uuid":"ccd256d8-2296-48ef-b082-582b8e344e6d","timestamp":"2026-04-01T13:19:58.486Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"ccd256d8-2296-48ef-b082-582b8e344e6d","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"User has approved your plan. You can now start coding. Start with updating your todo list if applicable\n\nYour plan has been saved to: /Users/jan/.claude/plans/stateful-frolicking-jellyfish.md\nYou can refer back to it if needed during implementation.\n\n## Approved Plan:\n# Plan: Sync metric-store config and docs with cc-backend\n\n## Context\n\nThe `MetricStoreConfig` struct in `cc-backend/pkg/metricstore/config.go` has evolved. The\ncc-metric-store's config template and documentation are out of sync. Specifically:\n\n1. `checkpoints.interval` was moved to a top-level `checkpoint-interval` field\n2. `cleanup.interval` was removed (now derived from `retention-in-memory`)\n3. A new `checkpoints.file-format` field (`\"json\"` or `\"wal\"`) was added; `\"wal\"` is now the default\n4. New optional fields: `num-workers`, `checkpoints.max-wal-size`\n5. README incorrectly says `memory-cap` is in MB (it's GB)\n6. README incorrectly labels `\"json\"` as the default checkpoint format (it's `\"wal\"`)\n\n## Files to change\n\n### 1. `configs/config.json`\n\nCurrent broken `metric-store` section:\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"interval\": \"12h\", ← INVALID field (moved to top-level)\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"48h\",\n \"cleanup\": {\n \"mode\": \"archive\",\n \"interval\": \"48h\", ← INVALID field (derived from retention-in-memory)\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [...]\n}\n```\n\nFix:\n- Remove `checkpoints.interval`\n- Remove `cleanup.interval`\n- Add `checkpoints.file-format: \"wal\"`\n- Add top-level `checkpoint-interval: \"12h\"`\n\n### 2. `README.md`\n\nTwo description bugs (the example JSON block is already correct):\n\n- Line ~180: `memory-cap` description says \"MB\" → fix to \"GB\"\n- Line ~177: `checkpoints.file-format` says `\"json\"` (default) → fix to `\"wal\"` (default)\n- \"Checkpoint formats\" section: `**\\`\"json\"\\` (default)**` header → remove `(default)`, and `**\\`\"wal\"\\`**` → add `(default)` to WAL header\n\n### 3. `CLAUDE.md`\n\nUpdate `metric-store` config description to reflect:\n- `checkpoint-interval` as top-level field (no longer inside `checkpoints`)\n- WAL format as the default\n- Removal of `cleanup.interval` (derived)\n- New fields: `num-workers`, `checkpoints.file-format`, `checkpoints.max-wal-size`\n\n## Critical files\n\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md`\n\nReference (read-only):\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` — authoritative struct\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go` — authoritative JSON schema\n\n## Verification\n\n- `go build ./...` in cc-metric-store (config is only read at runtime, but build confirms no breakage)\n- Manually inspect that `configs/config.json` passes the schema from `configSchema.go` (no unknown fields)\n- Review README render for correctness\n","tool_use_id":"toolu_01UMKkakigZ9GU2Fo7BgHX8n"}]},"uuid":"e92f7558-2cb4-48f7-9089-eab11a11f051","timestamp":"2026-04-01T13:21:35.152Z","toolUseResult":{"plan":"# Plan: Sync metric-store config and docs with cc-backend\n\n## Context\n\nThe `MetricStoreConfig` struct in `cc-backend/pkg/metricstore/config.go` has evolved. The\ncc-metric-store's config template and documentation are out of sync. Specifically:\n\n1. `checkpoints.interval` was moved to a top-level `checkpoint-interval` field\n2. `cleanup.interval` was removed (now derived from `retention-in-memory`)\n3. A new `checkpoints.file-format` field (`\"json\"` or `\"wal\"`) was added; `\"wal\"` is now the default\n4. New optional fields: `num-workers`, `checkpoints.max-wal-size`\n5. README incorrectly says `memory-cap` is in MB (it's GB)\n6. README incorrectly labels `\"json\"` as the default checkpoint format (it's `\"wal\"`)\n\n## Files to change\n\n### 1. `configs/config.json`\n\nCurrent broken `metric-store` section:\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"interval\": \"12h\", ← INVALID field (moved to top-level)\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"48h\",\n \"cleanup\": {\n \"mode\": \"archive\",\n \"interval\": \"48h\", ← INVALID field (derived from retention-in-memory)\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [...]\n}\n```\n\nFix:\n- Remove `checkpoints.interval`\n- Remove `cleanup.interval`\n- Add `checkpoints.file-format: \"wal\"`\n- Add top-level `checkpoint-interval: \"12h\"`\n\n### 2. `README.md`\n\nTwo description bugs (the example JSON block is already correct):\n\n- Line ~180: `memory-cap` description says \"MB\" → fix to \"GB\"\n- Line ~177: `checkpoints.file-format` says `\"json\"` (default) → fix to `\"wal\"` (default)\n- \"Checkpoint formats\" section: `**\\`\"json\"\\` (default)**` header → remove `(default)`, and `**\\`\"wal\"\\`**` → add `(default)` to WAL header\n\n### 3. `CLAUDE.md`\n\nUpdate `metric-store` config description to reflect:\n- `checkpoint-interval` as top-level field (no longer inside `checkpoints`)\n- WAL format as the default\n- Removal of `cleanup.interval` (derived)\n- New fields: `num-workers`, `checkpoints.file-format`, `checkpoints.max-wal-size`\n\n## Critical files\n\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md`\n\nReference (read-only):\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` — authoritative struct\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go` — authoritative JSON schema\n\n## Verification\n\n- `go build ./...` in cc-metric-store (config is only read at runtime, but build confirms no breakage)\n- Manually inspect that `configs/config.json` passes the schema from `configSchema.go` (no unknown fields)\n- Review README render for correctness\n","isAgent":false,"filePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md"},"sourceToolAssistantUUID":"ccd256d8-2296-48ef-b082-582b8e344e6d","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"733bd180-f6d9-4958-829c-a1fe0ef3e1f5","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015GmiJCy8qEiD6sbWcBWFpD","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-metric-store/README.md has been updated successfully."}]},"uuid":"724e9db5-997f-417d-ac48-6868c46cdc3d","timestamp":"2026-04-01T13:21:46.608Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md","oldString":"- `checkpoints.file-format`: Checkpoint format: `\"json\"` (default, human-readable) or `\"wal\"` (binary WAL, crash-safe). See [Checkpoint formats](#checkpoint-formats) below.\n- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n- `memory-cap`: Approximate memory cap in MB for metric buffers","newString":"- `checkpoints.file-format`: Checkpoint format: `\"wal\"` (default, binary WAL, crash-safe) or `\"json\"` (human-readable). See [Checkpoint formats](#checkpoint-formats) below.\n- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n- `memory-cap`: Memory cap in GB for metric buffers","originalFile":"# ClusterCockpit Metric Store\n\n[![Build & Test](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml/badge.svg)](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml)\n\nThe cc-metric-store provides a simple in-memory time series database for storing\nmetrics of cluster nodes at preconfigured intervals. It is meant to be used as\npart of the [ClusterCockpit suite](https://github.com/ClusterCockpit). As all\ndata is kept in-memory, accessing it is very fast. It also provides topology aware\naggregations over time _and_ nodes/sockets/cpus.\n\nThe storage engine is provided by the\n[cc-backend](https://github.com/ClusterCockpit/cc-backend) package\n(`cc-backend/pkg/metricstore`). This repository provides the HTTP API wrapper.\n\nThe [NATS.io](https://nats.io/) based writing endpoint and the HTTP write\nendpoint both consume messages in [this format of the InfluxDB line\nprotocol](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md).\n\n## Building\n\n`cc-metric-store` can be built using the provided `Makefile`.\nIt supports the following targets:\n\n- `make`: Build the application, copy an example configuration file and generate\n checkpoint folders if required.\n- `make clean`: Clean the golang build cache and application binary\n- `make distclean`: In addition to the clean target also remove the `./var`\n folder and `config.json`\n- `make swagger`: Regenerate the Swagger files from the source comments.\n- `make test`: Run tests and basic checks (`go build`, `go vet`, `go test`).\n\n## Running\n\n```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n```\n\n## REST API Endpoints\n\nThe REST API is documented in [swagger.json](./api/swagger.json). You can\nexplore and try the REST API using the integrated [SwaggerUI web\ninterface](http://localhost:8082/swagger/) (requires the `-dev` flag).\n\nFor more information on the `cc-metric-store` REST API have a look at the\nClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-rest-api/).\n\nAll endpoints support both trailing-slash and non-trailing-slash variants:\n\n| Method | Path | Description |\n| ------ | ------------------- | -------------------------------------- |\n| `GET` | `/api/query/` | Query metrics with selectors |\n| `POST` | `/api/write/` | Write metrics (InfluxDB line protocol) |\n| `POST` | `/api/free/` | Free buffers up to a timestamp |\n| `GET` | `/api/debug/` | Dump internal state |\n| `GET` | `/api/healthcheck/` | Check node health status |\n\nIf `jwt-public-key` is set in `config.json`, all endpoints require JWT\nauthentication using an Ed25519 key (`Authorization: Bearer <token>`).\n\n## Run tests\n\nSome benchmarks concurrently access the `MemoryStore`, so enabling the\n[Race Detector](https://golang.org/doc/articles/race_detector) might be useful.\nThe benchmarks also work as tests as they do check if the returned values are as\nexpected.\n\n```sh\n# Tests only\ngo test -v ./...\n\n# Benchmarks as well\ngo test -bench=. -race -v ./...\n```\n\n## What are these selectors mentioned in the code?\n\nThe cc-metric-store works as a time-series database and uses the InfluxDB line\nprotocol as input format. Unlike InfluxDB, the data is indexed by one single\nstrictly hierarchical tree structure. A selector is built out of the tags in the\nInfluxDB line protocol, and can be used to select a node (not in the sense of a\ncompute node, can also be a socket, cpu, ...) in that tree. The implementation\ncalls those nodes `level` to avoid confusion. It is impossible to access data\nonly by knowing the _socket_ or _cpu_ tag — all higher up levels have to be\nspecified as well.\n\nThis is what the hierarchy currently looks like:\n\n- cluster1\n - host1\n - socket0\n - socket1\n - ...\n - cpu1\n - cpu2\n - cpu3\n - cpu4\n - ...\n - gpu1\n - gpu2\n - host2\n - ...\n- cluster2\n- ...\n\nExample selectors:\n\n1. `[\"cluster1\", \"host1\", \"cpu0\"]`: Select only the cpu0 of host1 in cluster1\n2. `[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\", \"cpu6\", \"cpu7\"]]`: Select only CPUs 4-7 of host1 in cluster1\n3. `[\"cluster1\", \"host1\"]`: Select the complete node. If querying for a CPU-specific metric such as flops, all CPUs are implied\n\n## Config file\n\nThe config file is a JSON document with four top-level sections.\n\n### `main`\n\n```json\n\"main\": {\n \"addr\": \"0.0.0.0:8082\",\n \"https-cert-file\": \"\",\n \"https-key-file\": \"\",\n \"jwt-public-key\": \"<base64-encoded Ed25519 public key>\",\n \"user\": \"\",\n \"group\": \"\",\n \"backend-url\": \"\"\n}\n```\n\n- `addr`: Address and port to listen on (default: `0.0.0.0:8082`)\n- `https-cert-file` / `https-key-file`: Paths to TLS certificate/key for HTTPS\n- `jwt-public-key`: Base64-encoded Ed25519 public key for JWT authentication. If empty, no auth is required.\n- `user` / `group`: Drop privileges to this user/group after startup\n- `backend-url`: Optional URL of a cc-backend instance used as node provider\n\n### `metrics`\n\nPer-metric configuration. Each key is the metric name:\n\n```json\n\"metrics\": {\n \"cpu_load\": { \"frequency\": 60, \"aggregation\": null },\n \"flops_any\": { \"frequency\": 60, \"aggregation\": \"sum\" },\n \"cpu_user\": { \"frequency\": 60, \"aggregation\": \"avg\" }\n}\n```\n\n- `frequency`: Sampling interval in seconds\n- `aggregation`: How to aggregate sub-level data: `\"sum\"`, `\"avg\"`, or `null` (no aggregation)\n\n### `metric-store`\n\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"file-format\": \"wal\",\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"24h\",\n \"num-workers\": 0,\n \"cleanup\": {\n \"mode\": \"archive\",\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [\n { \"subscribe-to\": \"hpc-nats\", \"cluster-tag\": \"fritz\" }\n ]\n}\n```\n\n- `checkpoints.file-format`: Checkpoint format: `\"json\"` (default, human-readable) or `\"wal\"` (binary WAL, crash-safe). See [Checkpoint formats](#checkpoint-formats) below.\n- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n- `memory-cap`: Approximate memory cap in MB for metric buffers\n- `retention-in-memory`: How long to keep data in memory (e.g. `\"48h\"`)\n- `num-workers`: Number of parallel workers for checkpoint/archive I/O (0 = auto, capped at 10)\n- `cleanup.mode`: What to do with data older than `retention-in-memory`: `\"archive\"` (write Parquet) or `\"delete\"`\n- `cleanup.directory`: Root directory for Parquet archive files (required when `mode` is `\"archive\"`)\n- `nats-subscriptions`: List of NATS subjects to subscribe to, with associated cluster tag\n\n### Checkpoint formats\n\nThe `checkpoints.file-format` field controls how in-memory data is persisted to disk.\n\n**`\"json\"` (default)** — human-readable JSON snapshots written periodically. Each\nsnapshot is stored as `<dir>/<cluster>/<host>/<timestamp>.json` and contains the\nfull metric hierarchy. Easy to inspect and recover manually, but larger on disk\nand slower to write.\n\n**`\"wal\"`** — binary Write-Ahead Log format designed for crash safety. Two file\ntypes are used per host:\n\n- `current.wal` — append-only binary log. Every incoming data point is appended\n immediately (magic `0xCC1DA7A1`, 4-byte CRC32 per record). Truncated trailing\n records from unclean shutdowns are silently skipped on restart.\n- `<timestamp>.bin` — binary snapshot written at each checkpoint interval\n (magic `0xCC5B0001`). Contains the complete hierarchical metric state\n column-by-column. Written atomically via a `.tmp` rename.\n\nOn startup the most recent `.bin` snapshot is loaded, then any remaining WAL\nentries are replayed on top. The WAL is rotated (old file deleted, new one\nstarted) after each successful snapshot.\n\nThe `\"wal\"` option is the default and will be the only supported option in the\nfuture. The `\"json\"` checkpoint format is still provided to migrate from\nprevious cc-metric-store version.\n\n### Parquet archive\n\nWhen `cleanup.mode` is `\"archive\"`, data that ages out of the in-memory\nretention window is written to [Apache Parquet](https://parquet.apache.org/)\nfiles before being freed. Files are organized as:\n\n```\n<cleanup.directory>/\n <cluster>/\n <timestamp>.parquet\n```\n\nOne Parquet file is produced per cluster per cleanup run, consolidating all\nhosts. Rows use a long (tidy) schema:\n\n| Column | Type | Description |\n| ----------- | ------- | ----------------------------------------------------------------------- |\n| `cluster` | string | Cluster name |\n| `hostname` | string | Host name |\n| `metric` | string | Metric name |\n| `scope` | string | Hardware scope (`node`, `socket`, `core`, `hwthread`, `accelerator`, …) |\n| `scope_id` | string | Numeric ID within the scope (e.g. `\"0\"`) |\n| `timestamp` | int64 | Unix timestamp (seconds) |\n| `frequency` | int64 | Sampling interval in seconds |\n| `value` | float32 | Metric value |\n\nFiles are compressed with Zstandard and sorted by `(cluster, hostname, metric,\ntimestamp)` for efficient columnar reads. The `cpu` prefix in the tree is\ntreated as an alias for `hwthread` scope.\n\n### `nats`\n\n```json\n\"nats\": {\n \"address\": \"nats://0.0.0.0:4222\",\n \"username\": \"root\",\n \"password\": \"root\"\n}\n```\n\nNATS connection is optional. If not configured, only the HTTP write endpoint is available.\n\nFor more information see the ClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-configuration/).\n\n## Test the complete setup (excluding cc-backend itself)\n\nThere are two ways for sending data to the cc-metric-store, both of which are\nsupported by the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector).\nThis example uses NATS; the alternative is to use HTTP.\n\n```sh\n# Only needed once, downloads the docker image\ndocker pull nats:latest\n\n# Start the NATS server\ndocker run -p 4222:4222 -ti nats:latest\n```\n\nSecond, build and start the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector)\nusing the following as Sink-Config:\n\n```json\n{\n \"type\": \"nats\",\n \"host\": \"localhost\",\n \"port\": \"4222\",\n \"database\": \"updates\"\n}\n```\n\nThird, build and start the metric store. For this example here, the\n`config.json` file already in the repository should work just fine.\n\n```sh\n# Assuming you have a clone of this repo in ./cc-metric-store:\ncd cc-metric-store\nmake\n./cc-metric-store\n```\n\nAnd finally, use the API to fetch some data. The API is protected by JWT based\nauthentication if `jwt-public-key` is set in `config.json`. You can use this JWT\nfor testing:\n`REDACTED`\n\n```sh\nJWT=\"REDACTED\"\n\n# If the collector and store and nats-server have been running for at least 60 seconds on the same host:\ncurl -H \"Authorization: Bearer $JWT\" \\\n \"http://localhost:8082/api/query/\" \\\n -d '{\n \"cluster\": \"testcluster\",\n \"from\": '\"$(expr $(date +%s) - 60)\"',\n \"to\": '\"$(date +%s)\"',\n \"queries\": [{ \"metric\": \"cpu_load\", \"host\": \"'\"$(hostname)\"'\" }]\n }'\n```\n\nFor debugging, the debug endpoint dumps the current content to stdout:\n\n```sh\nJWT=\"REDACTED\"\n\n# Dump everything\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/\"\n\n# Dump a specific selector (colon-separated path)\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/?selector=testcluster:host1\"\n```\n","structuredPatch":[{"oldStart":174,"oldLines":9,"newStart":174,"newLines":9,"lines":[" }"," ```"," ","-- `checkpoints.file-format`: Checkpoint format: `\"json\"` (default, human-readable) or `\"wal\"` (binary WAL, crash-safe). 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Two file","originalFile":"# ClusterCockpit Metric Store\n\n[![Build & Test](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml/badge.svg)](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml)\n\nThe cc-metric-store provides a simple in-memory time series database for storing\nmetrics of cluster nodes at preconfigured intervals. It is meant to be used as\npart of the [ClusterCockpit suite](https://github.com/ClusterCockpit). As all\ndata is kept in-memory, accessing it is very fast. It also provides topology aware\naggregations over time _and_ nodes/sockets/cpus.\n\nThe storage engine is provided by the\n[cc-backend](https://github.com/ClusterCockpit/cc-backend) package\n(`cc-backend/pkg/metricstore`). This repository provides the HTTP API wrapper.\n\nThe [NATS.io](https://nats.io/) based writing endpoint and the HTTP write\nendpoint both consume messages in [this format of the InfluxDB line\nprotocol](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md).\n\n## Building\n\n`cc-metric-store` can be built using the provided `Makefile`.\nIt supports the following targets:\n\n- `make`: Build the application, copy an example configuration file and generate\n checkpoint folders if required.\n- `make clean`: Clean the golang build cache and application binary\n- `make distclean`: In addition to the clean target also remove the `./var`\n folder and `config.json`\n- `make swagger`: Regenerate the Swagger files from the source comments.\n- `make test`: Run tests and basic checks (`go build`, `go vet`, `go test`).\n\n## Running\n\n```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n```\n\n## REST API Endpoints\n\nThe REST API is documented in [swagger.json](./api/swagger.json). You can\nexplore and try the REST API using the integrated [SwaggerUI web\ninterface](http://localhost:8082/swagger/) (requires the `-dev` flag).\n\nFor more information on the `cc-metric-store` REST API have a look at the\nClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-rest-api/).\n\nAll endpoints support both trailing-slash and non-trailing-slash variants:\n\n| Method | Path | Description |\n| ------ | ------------------- | -------------------------------------- |\n| `GET` | `/api/query/` | Query metrics with selectors |\n| `POST` | `/api/write/` | Write metrics (InfluxDB line protocol) |\n| `POST` | `/api/free/` | Free buffers up to a timestamp |\n| `GET` | `/api/debug/` | Dump internal state |\n| `GET` | `/api/healthcheck/` | Check node health status |\n\nIf `jwt-public-key` is set in `config.json`, all endpoints require JWT\nauthentication using an Ed25519 key (`Authorization: Bearer <token>`).\n\n## Run tests\n\nSome benchmarks concurrently access the `MemoryStore`, so enabling the\n[Race Detector](https://golang.org/doc/articles/race_detector) might be useful.\nThe benchmarks also work as tests as they do check if the returned values are as\nexpected.\n\n```sh\n# Tests only\ngo test -v ./...\n\n# Benchmarks as well\ngo test -bench=. -race -v ./...\n```\n\n## What are these selectors mentioned in the code?\n\nThe cc-metric-store works as a time-series database and uses the InfluxDB line\nprotocol as input format. Unlike InfluxDB, the data is indexed by one single\nstrictly hierarchical tree structure. A selector is built out of the tags in the\nInfluxDB line protocol, and can be used to select a node (not in the sense of a\ncompute node, can also be a socket, cpu, ...) in that tree. The implementation\ncalls those nodes `level` to avoid confusion. It is impossible to access data\nonly by knowing the _socket_ or _cpu_ tag — all higher up levels have to be\nspecified as well.\n\nThis is what the hierarchy currently looks like:\n\n- cluster1\n - host1\n - socket0\n - socket1\n - ...\n - cpu1\n - cpu2\n - cpu3\n - cpu4\n - ...\n - gpu1\n - gpu2\n - host2\n - ...\n- cluster2\n- ...\n\nExample selectors:\n\n1. `[\"cluster1\", \"host1\", \"cpu0\"]`: Select only the cpu0 of host1 in cluster1\n2. `[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\", \"cpu6\", \"cpu7\"]]`: Select only CPUs 4-7 of host1 in cluster1\n3. `[\"cluster1\", \"host1\"]`: Select the complete node. If querying for a CPU-specific metric such as flops, all CPUs are implied\n\n## Config file\n\nThe config file is a JSON document with four top-level sections.\n\n### `main`\n\n```json\n\"main\": {\n \"addr\": \"0.0.0.0:8082\",\n \"https-cert-file\": \"\",\n \"https-key-file\": \"\",\n \"jwt-public-key\": \"<base64-encoded Ed25519 public key>\",\n \"user\": \"\",\n \"group\": \"\",\n \"backend-url\": \"\"\n}\n```\n\n- `addr`: Address and port to listen on (default: `0.0.0.0:8082`)\n- `https-cert-file` / `https-key-file`: Paths to TLS certificate/key for HTTPS\n- `jwt-public-key`: Base64-encoded Ed25519 public key for JWT authentication. If empty, no auth is required.\n- `user` / `group`: Drop privileges to this user/group after startup\n- `backend-url`: Optional URL of a cc-backend instance used as node provider\n\n### `metrics`\n\nPer-metric configuration. Each key is the metric name:\n\n```json\n\"metrics\": {\n \"cpu_load\": { \"frequency\": 60, \"aggregation\": null },\n \"flops_any\": { \"frequency\": 60, \"aggregation\": \"sum\" },\n \"cpu_user\": { \"frequency\": 60, \"aggregation\": \"avg\" }\n}\n```\n\n- `frequency`: Sampling interval in seconds\n- `aggregation`: How to aggregate sub-level data: `\"sum\"`, `\"avg\"`, or `null` (no aggregation)\n\n### `metric-store`\n\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"file-format\": \"wal\",\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"24h\",\n \"num-workers\": 0,\n \"cleanup\": {\n \"mode\": \"archive\",\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [\n { \"subscribe-to\": \"hpc-nats\", \"cluster-tag\": \"fritz\" }\n ]\n}\n```\n\n- `checkpoints.file-format`: Checkpoint format: `\"wal\"` (default, binary WAL, crash-safe) or `\"json\"` (human-readable). See [Checkpoint formats](#checkpoint-formats) below.\n- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n- `memory-cap`: Memory cap in GB for metric buffers\n- `retention-in-memory`: How long to keep data in memory (e.g. `\"48h\"`)\n- `num-workers`: Number of parallel workers for checkpoint/archive I/O (0 = auto, capped at 10)\n- `cleanup.mode`: What to do with data older than `retention-in-memory`: `\"archive\"` (write Parquet) or `\"delete\"`\n- `cleanup.directory`: Root directory for Parquet archive files (required when `mode` is `\"archive\"`)\n- `nats-subscriptions`: List of NATS subjects to subscribe to, with associated cluster tag\n\n### Checkpoint formats\n\nThe `checkpoints.file-format` field controls how in-memory data is persisted to disk.\n\n**`\"json\"` (default)** — human-readable JSON snapshots written periodically. Each\nsnapshot is stored as `<dir>/<cluster>/<host>/<timestamp>.json` and contains the\nfull metric hierarchy. Easy to inspect and recover manually, but larger on disk\nand slower to write.\n\n**`\"wal\"`** — binary Write-Ahead Log format designed for crash safety. Two file\ntypes are used per host:\n\n- `current.wal` — append-only binary log. Every incoming data point is appended\n immediately (magic `0xCC1DA7A1`, 4-byte CRC32 per record). Truncated trailing\n records from unclean shutdowns are silently skipped on restart.\n- `<timestamp>.bin` — binary snapshot written at each checkpoint interval\n (magic `0xCC5B0001`). Contains the complete hierarchical metric state\n column-by-column. Written atomically via a `.tmp` rename.\n\nOn startup the most recent `.bin` snapshot is loaded, then any remaining WAL\nentries are replayed on top. The WAL is rotated (old file deleted, new one\nstarted) after each successful snapshot.\n\nThe `\"wal\"` option is the default and will be the only supported option in the\nfuture. The `\"json\"` checkpoint format is still provided to migrate from\nprevious cc-metric-store version.\n\n### Parquet archive\n\nWhen `cleanup.mode` is `\"archive\"`, data that ages out of the in-memory\nretention window is written to [Apache Parquet](https://parquet.apache.org/)\nfiles before being freed. Files are organized as:\n\n```\n<cleanup.directory>/\n <cluster>/\n <timestamp>.parquet\n```\n\nOne Parquet file is produced per cluster per cleanup run, consolidating all\nhosts. Rows use a long (tidy) schema:\n\n| Column | Type | Description |\n| ----------- | ------- | ----------------------------------------------------------------------- |\n| `cluster` | string | Cluster name |\n| `hostname` | string | Host name |\n| `metric` | string | Metric name |\n| `scope` | string | Hardware scope (`node`, `socket`, `core`, `hwthread`, `accelerator`, …) |\n| `scope_id` | string | Numeric ID within the scope (e.g. `\"0\"`) |\n| `timestamp` | int64 | Unix timestamp (seconds) |\n| `frequency` | int64 | Sampling interval in seconds |\n| `value` | float32 | Metric value |\n\nFiles are compressed with Zstandard and sorted by `(cluster, hostname, metric,\ntimestamp)` for efficient columnar reads. The `cpu` prefix in the tree is\ntreated as an alias for `hwthread` scope.\n\n### `nats`\n\n```json\n\"nats\": {\n \"address\": \"nats://0.0.0.0:4222\",\n \"username\": \"root\",\n \"password\": \"root\"\n}\n```\n\nNATS connection is optional. If not configured, only the HTTP write endpoint is available.\n\nFor more information see the ClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-configuration/).\n\n## Test the complete setup (excluding cc-backend itself)\n\nThere are two ways for sending data to the cc-metric-store, both of which are\nsupported by the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector).\nThis example uses NATS; the alternative is to use HTTP.\n\n```sh\n# Only needed once, downloads the docker image\ndocker pull nats:latest\n\n# Start the NATS server\ndocker run -p 4222:4222 -ti nats:latest\n```\n\nSecond, build and start the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector)\nusing the following as Sink-Config:\n\n```json\n{\n \"type\": \"nats\",\n \"host\": \"localhost\",\n \"port\": \"4222\",\n \"database\": \"updates\"\n}\n```\n\nThird, build and start the metric store. For this example here, the\n`config.json` file already in the repository should work just fine.\n\n```sh\n# Assuming you have a clone of this repo in ./cc-metric-store:\ncd cc-metric-store\nmake\n./cc-metric-store\n```\n\nAnd finally, use the API to fetch some data. The API is protected by JWT based\nauthentication if `jwt-public-key` is set in `config.json`. You can use this JWT\nfor testing:\n`REDACTED`\n\n```sh\nJWT=\"REDACTED\"\n\n# If the collector and store and nats-server have been running for at least 60 seconds on the same host:\ncurl -H \"Authorization: Bearer $JWT\" \\\n \"http://localhost:8082/api/query/\" \\\n -d '{\n \"cluster\": \"testcluster\",\n \"from\": '\"$(expr $(date +%s) - 60)\"',\n \"to\": '\"$(date +%s)\"',\n \"queries\": [{ \"metric\": \"cpu_load\", \"host\": \"'\"$(hostname)\"'\" }]\n }'\n```\n\nFor debugging, the debug endpoint dumps the current content to stdout:\n\n```sh\nJWT=\"REDACTED\"\n\n# Dump everything\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/\"\n\n# Dump a specific selector (colon-separated path)\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/?selector=testcluster:host1\"\n```\n","structuredPatch":[{"oldStart":187,"oldLines":12,"newStart":187,"newLines":7,"lines":[" "," The `checkpoints.file-format` field controls how in-memory data is persisted to disk."," ","-**`\"json\"` (default)** — human-readable JSON snapshots written periodically. 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{"parentUuid":"ba845b8f-6e7a-4b4e-89c7-d16390565beb","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Xq4m4eXuufbcL7SkzoEF8j","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-metric-store/README.md has been updated successfully."}]},"uuid":"c72e76f9-7f01-40fe-b590-02a017d0ed8a","timestamp":"2026-04-01T13:21:59.281Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md","oldString":"On startup the most recent `.bin` snapshot is loaded, then any remaining WAL\nentries are replayed on top. The WAL is rotated (old file deleted, new one\nstarted) after each successful snapshot.\n\nThe `\"wal\"` option is the default and will be the only supported option in the\nfuture. The `\"json\"` checkpoint format is still provided to migrate from\nprevious cc-metric-store version.","newString":"On startup the most recent `.bin` snapshot is loaded, then any remaining WAL\nentries are replayed on top. The WAL is rotated (old file deleted, new one\nstarted) after each successful snapshot.\n\n**`\"json\"`** — human-readable JSON snapshots written periodically. Each snapshot\nis stored as `<dir>/<cluster>/<host>/<timestamp>.json` and contains the full\nmetric hierarchy. Easy to inspect and recover manually, but larger on disk and\nslower to write. Still provided to migrate from previous installations; `\"wal\"`\nwill be the only supported format in a future release.","originalFile":"# ClusterCockpit Metric Store\n\n[![Build & Test](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml/badge.svg)](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml)\n\nThe cc-metric-store provides a simple in-memory time series database for storing\nmetrics of cluster nodes at preconfigured intervals. It is meant to be used as\npart of the [ClusterCockpit suite](https://github.com/ClusterCockpit). As all\ndata is kept in-memory, accessing it is very fast. It also provides topology aware\naggregations over time _and_ nodes/sockets/cpus.\n\nThe storage engine is provided by the\n[cc-backend](https://github.com/ClusterCockpit/cc-backend) package\n(`cc-backend/pkg/metricstore`). This repository provides the HTTP API wrapper.\n\nThe [NATS.io](https://nats.io/) based writing endpoint and the HTTP write\nendpoint both consume messages in [this format of the InfluxDB line\nprotocol](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md).\n\n## Building\n\n`cc-metric-store` can be built using the provided `Makefile`.\nIt supports the following targets:\n\n- `make`: Build the application, copy an example configuration file and generate\n checkpoint folders if required.\n- `make clean`: Clean the golang build cache and application binary\n- `make distclean`: In addition to the clean target also remove the `./var`\n folder and `config.json`\n- `make swagger`: Regenerate the Swagger files from the source comments.\n- `make test`: Run tests and basic checks (`go build`, `go vet`, `go test`).\n\n## Running\n\n```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n```\n\n## REST API Endpoints\n\nThe REST API is documented in [swagger.json](./api/swagger.json). You can\nexplore and try the REST API using the integrated [SwaggerUI web\ninterface](http://localhost:8082/swagger/) (requires the `-dev` flag).\n\nFor more information on the `cc-metric-store` REST API have a look at the\nClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-rest-api/).\n\nAll endpoints support both trailing-slash and non-trailing-slash variants:\n\n| Method | Path | Description |\n| ------ | ------------------- | -------------------------------------- |\n| `GET` | `/api/query/` | Query metrics with selectors |\n| `POST` | `/api/write/` | Write metrics (InfluxDB line protocol) |\n| `POST` | `/api/free/` | Free buffers up to a timestamp |\n| `GET` | `/api/debug/` | Dump internal state |\n| `GET` | `/api/healthcheck/` | Check node health status |\n\nIf `jwt-public-key` is set in `config.json`, all endpoints require JWT\nauthentication using an Ed25519 key (`Authorization: Bearer <token>`).\n\n## Run tests\n\nSome benchmarks concurrently access the `MemoryStore`, so enabling the\n[Race Detector](https://golang.org/doc/articles/race_detector) might be useful.\nThe benchmarks also work as tests as they do check if the returned values are as\nexpected.\n\n```sh\n# Tests only\ngo test -v ./...\n\n# Benchmarks as well\ngo test -bench=. -race -v ./...\n```\n\n## What are these selectors mentioned in the code?\n\nThe cc-metric-store works as a time-series database and uses the InfluxDB line\nprotocol as input format. Unlike InfluxDB, the data is indexed by one single\nstrictly hierarchical tree structure. A selector is built out of the tags in the\nInfluxDB line protocol, and can be used to select a node (not in the sense of a\ncompute node, can also be a socket, cpu, ...) in that tree. The implementation\ncalls those nodes `level` to avoid confusion. It is impossible to access data\nonly by knowing the _socket_ or _cpu_ tag — all higher up levels have to be\nspecified as well.\n\nThis is what the hierarchy currently looks like:\n\n- cluster1\n - host1\n - socket0\n - socket1\n - ...\n - cpu1\n - cpu2\n - cpu3\n - cpu4\n - ...\n - gpu1\n - gpu2\n - host2\n - ...\n- cluster2\n- ...\n\nExample selectors:\n\n1. `[\"cluster1\", \"host1\", \"cpu0\"]`: Select only the cpu0 of host1 in cluster1\n2. `[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\", \"cpu6\", \"cpu7\"]]`: Select only CPUs 4-7 of host1 in cluster1\n3. `[\"cluster1\", \"host1\"]`: Select the complete node. If querying for a CPU-specific metric such as flops, all CPUs are implied\n\n## Config file\n\nThe config file is a JSON document with four top-level sections.\n\n### `main`\n\n```json\n\"main\": {\n \"addr\": \"0.0.0.0:8082\",\n \"https-cert-file\": \"\",\n \"https-key-file\": \"\",\n \"jwt-public-key\": \"<base64-encoded Ed25519 public key>\",\n \"user\": \"\",\n \"group\": \"\",\n \"backend-url\": \"\"\n}\n```\n\n- `addr`: Address and port to listen on (default: `0.0.0.0:8082`)\n- `https-cert-file` / `https-key-file`: Paths to TLS certificate/key for HTTPS\n- `jwt-public-key`: Base64-encoded Ed25519 public key for JWT authentication. If empty, no auth is required.\n- `user` / `group`: Drop privileges to this user/group after startup\n- `backend-url`: Optional URL of a cc-backend instance used as node provider\n\n### `metrics`\n\nPer-metric configuration. Each key is the metric name:\n\n```json\n\"metrics\": {\n \"cpu_load\": { \"frequency\": 60, \"aggregation\": null },\n \"flops_any\": { \"frequency\": 60, \"aggregation\": \"sum\" },\n \"cpu_user\": { \"frequency\": 60, \"aggregation\": \"avg\" }\n}\n```\n\n- `frequency`: Sampling interval in seconds\n- `aggregation`: How to aggregate sub-level data: `\"sum\"`, `\"avg\"`, or `null` (no aggregation)\n\n### `metric-store`\n\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"file-format\": \"wal\",\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"24h\",\n \"num-workers\": 0,\n \"cleanup\": {\n \"mode\": \"archive\",\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [\n { \"subscribe-to\": \"hpc-nats\", \"cluster-tag\": \"fritz\" }\n ]\n}\n```\n\n- `checkpoints.file-format`: Checkpoint format: `\"wal\"` (default, binary WAL, crash-safe) or `\"json\"` (human-readable). See [Checkpoint formats](#checkpoint-formats) below.\n- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n- `memory-cap`: Memory cap in GB for metric buffers\n- `retention-in-memory`: How long to keep data in memory (e.g. `\"48h\"`)\n- `num-workers`: Number of parallel workers for checkpoint/archive I/O (0 = auto, capped at 10)\n- `cleanup.mode`: What to do with data older than `retention-in-memory`: `\"archive\"` (write Parquet) or `\"delete\"`\n- `cleanup.directory`: Root directory for Parquet archive files (required when `mode` is `\"archive\"`)\n- `nats-subscriptions`: List of NATS subjects to subscribe to, with associated cluster tag\n\n### Checkpoint formats\n\nThe `checkpoints.file-format` field controls how in-memory data is persisted to disk.\n\n**`\"wal\"` (default)** — binary Write-Ahead Log format designed for crash safety. Two file\ntypes are used per host:\n\n- `current.wal` — append-only binary log. Every incoming data point is appended\n immediately (magic `0xCC1DA7A1`, 4-byte CRC32 per record). Truncated trailing\n records from unclean shutdowns are silently skipped on restart.\n- `<timestamp>.bin` — binary snapshot written at each checkpoint interval\n (magic `0xCC5B0001`). Contains the complete hierarchical metric state\n column-by-column. Written atomically via a `.tmp` rename.\n\nOn startup the most recent `.bin` snapshot is loaded, then any remaining WAL\nentries are replayed on top. The WAL is rotated (old file deleted, new one\nstarted) after each successful snapshot.\n\nThe `\"wal\"` option is the default and will be the only supported option in the\nfuture. The `\"json\"` checkpoint format is still provided to migrate from\nprevious cc-metric-store version.\n\n### Parquet archive\n\nWhen `cleanup.mode` is `\"archive\"`, data that ages out of the in-memory\nretention window is written to [Apache Parquet](https://parquet.apache.org/)\nfiles before being freed. Files are organized as:\n\n```\n<cleanup.directory>/\n <cluster>/\n <timestamp>.parquet\n```\n\nOne Parquet file is produced per cluster per cleanup run, consolidating all\nhosts. Rows use a long (tidy) schema:\n\n| Column | Type | Description |\n| ----------- | ------- | ----------------------------------------------------------------------- |\n| `cluster` | string | Cluster name |\n| `hostname` | string | Host name |\n| `metric` | string | Metric name |\n| `scope` | string | Hardware scope (`node`, `socket`, `core`, `hwthread`, `accelerator`, …) |\n| `scope_id` | string | Numeric ID within the scope (e.g. `\"0\"`) |\n| `timestamp` | int64 | Unix timestamp (seconds) |\n| `frequency` | int64 | Sampling interval in seconds |\n| `value` | float32 | Metric value |\n\nFiles are compressed with Zstandard and sorted by `(cluster, hostname, metric,\ntimestamp)` for efficient columnar reads. The `cpu` prefix in the tree is\ntreated as an alias for `hwthread` scope.\n\n### `nats`\n\n```json\n\"nats\": {\n \"address\": \"nats://0.0.0.0:4222\",\n \"username\": \"root\",\n \"password\": \"root\"\n}\n```\n\nNATS connection is optional. If not configured, only the HTTP write endpoint is available.\n\nFor more information see the ClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-configuration/).\n\n## Test the complete setup (excluding cc-backend itself)\n\nThere are two ways for sending data to the cc-metric-store, both of which are\nsupported by the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector).\nThis example uses NATS; the alternative is to use HTTP.\n\n```sh\n# Only needed once, downloads the docker image\ndocker pull nats:latest\n\n# Start the NATS server\ndocker run -p 4222:4222 -ti nats:latest\n```\n\nSecond, build and start the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector)\nusing the following as Sink-Config:\n\n```json\n{\n \"type\": \"nats\",\n \"host\": \"localhost\",\n \"port\": \"4222\",\n \"database\": \"updates\"\n}\n```\n\nThird, build and start the metric store. For this example here, the\n`config.json` file already in the repository should work just fine.\n\n```sh\n# Assuming you have a clone of this repo in ./cc-metric-store:\ncd cc-metric-store\nmake\n./cc-metric-store\n```\n\nAnd finally, use the API to fetch some data. The API is protected by JWT based\nauthentication if `jwt-public-key` is set in `config.json`. You can use this JWT\nfor testing:\n`REDACTED`\n\n```sh\nJWT=\"REDACTED\"\n\n# If the collector and store and nats-server have been running for at least 60 seconds on the same host:\ncurl -H \"Authorization: Bearer $JWT\" \\\n \"http://localhost:8082/api/query/\" \\\n -d '{\n \"cluster\": \"testcluster\",\n \"from\": '\"$(expr $(date +%s) - 60)\"',\n \"to\": '\"$(date +%s)\"',\n \"queries\": [{ \"metric\": \"cpu_load\", \"host\": \"'\"$(hostname)\"'\" }]\n }'\n```\n\nFor debugging, the debug endpoint dumps the current content to stdout:\n\n```sh\nJWT=\"REDACTED\"\n\n# Dump everything\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/\"\n\n# Dump a specific selector (colon-separated path)\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/?selector=testcluster:host1\"\n```\n","structuredPatch":[{"oldStart":201,"oldLines":9,"newStart":201,"newLines":11,"lines":[" entries are replayed on top. The WAL is rotated (old file deleted, new one"," started) after each successful snapshot."," ","-The `\"wal\"` option is the default and will be the only supported option in the","-future. The `\"json\"` checkpoint format is still provided to migrate from","-previous cc-metric-store version.","+**`\"json\"`** — human-readable JSON snapshots written periodically. Each snapshot","+is stored as `<dir>/<cluster>/<host>/<timestamp>.json` and contains the full","+metric hierarchy. Easy to inspect and recover manually, but larger on disk and","+slower to write. Still provided to migrate from previous installations; `\"wal\"`","+will be the only supported format in a future release."," "," ### Parquet archive"," "]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"ba845b8f-6e7a-4b4e-89c7-d16390565beb","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"6d8f8a5a-b205-4e6b-9624-890fa544a400","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_018oVg9ZHPyoWh8Gp8JzHCXv","type":"tool_result","content":" 1→# CLAUDE.md\n 2→\n 3→This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.\n 4→\n 5→## Project Overview\n 6→\n 7→cc-metric-store is an in-memory time-series database for HPC cluster metrics, part of the ClusterCockpit monitoring suite. Data is indexed by a hierarchical tree (cluster → host → socket/cpu/gpu) and accessed via selectors. The core storage engine lives in `cc-backend/pkg/metricstore`; this repo provides the HTTP API wrapper.\n 8→\n 9→## Build Commands\n 10→\n 11→```bash\n 12→make # Build binary, copy config template, create checkpoint dirs\n 13→make clean # Clean build cache and binary\n 14→make distclean # Also remove ./var and config.json\n 15→make swagger # Regenerate Swagger from source comments\n 16→make test # Run go build, go vet, go test\n 17→```\n 18→\n 19→## Testing\n 20→\n 21→```bash\n 22→go test -v ./... # Run tests\n 23→go test -bench=. -race -v ./... # With benchmarks and race detector\n 24→```\n 25→\n 26→Integration test scripts in `/endpoint-test-scripts/` for manual API testing.\n 27→\n 28→## Running\n 29→\n 30→```bash\n 31→./cc-metric-store # Uses ./config.json\n 32→./cc-metric-store -config /path/to/config.json\n 33→./cc-metric-store -dev # Enable Swagger UI at /swagger/\n 34→./cc-metric-store -loglevel debug # debug|info|warn|err|crit\n 35→```\n 36→\n 37→## Architecture\n 38→\n 39→**Entry point:** `cmd/cc-metric-store/main.go`\n 40→- `run()` → parse flags, init logging/config, connect NATS\n 41→- `runServer()` → init metricstore from cc-backend, start HTTP server\n 42→\n 43→**Key packages:**\n 44→- `internal/api/` - REST endpoints (query, write, free, debug, healthcheck) and JWT auth (Ed25519)\n 45→- `internal/config/` - Config loading and JSON schema validation\n 46→- External: `cc-backend/pkg/metricstore` - actual time-series storage engine\n 47→\n 48→**API endpoints** (all support optional JWT auth):\n 49→- `GET /api/query/` - Query metrics with selectors\n 50→- `POST /api/write/` - Write metrics (InfluxDB line protocol)\n 51→- `POST /api/free/` - Free buffers up to timestamp\n 52→- `GET /api/debug/` - Dump internal state\n 53→- `GET /api/healthcheck/` - Node health status\n 54→\n 55→## Selectors\n 56→\n 57→Data is accessed via hierarchical selectors:\n 58→```\n 59→[\"cluster1\", \"host1\", \"cpu0\"] # Specific CPU\n 60→[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\"]] # Multiple CPUs\n 61→[\"cluster1\", \"host1\"] # Entire node (all CPUs implied)\n 62→```\n 63→\n 64→## Configuration\n 65→\n 66→Config file structure (see `configs/config.json`):\n 67→- `main` - Server address, TLS certs, JWT public key, user/group for privilege drop\n 68→- `metrics` - Per-metric frequency and aggregation strategy (sum/avg/null)\n 69→- `metric-store` - Checkpoints, memory cap, retention, cleanup mode, NATS subscriptions\n 70→- `nats` - Optional NATS connection for receiving metrics\n 71→\n 72→## Test JWT\n 73→\n 74→For testing with JWT auth enabled:\n 75→```\n 76→REDACTED\n 77→```\n 78→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"e7870c02-daeb-4b75-a804-0463bf9abc83","timestamp":"2026-04-01T13:22:01.507Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md","content":"# CLAUDE.md\n\nThis file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.\n\n## Project Overview\n\ncc-metric-store is an in-memory time-series database for HPC cluster metrics, part of the ClusterCockpit monitoring suite. Data is indexed by a hierarchical tree (cluster → host → socket/cpu/gpu) and accessed via selectors. The core storage engine lives in `cc-backend/pkg/metricstore`; this repo provides the HTTP API wrapper.\n\n## Build Commands\n\n```bash\nmake # Build binary, copy config template, create checkpoint dirs\nmake clean # Clean build cache and binary\nmake distclean # Also remove ./var and config.json\nmake swagger # Regenerate Swagger from source comments\nmake test # Run go build, go vet, go test\n```\n\n## Testing\n\n```bash\ngo test -v ./... # Run tests\ngo test -bench=. -race -v ./... # With benchmarks and race detector\n```\n\nIntegration test scripts in `/endpoint-test-scripts/` for manual API testing.\n\n## Running\n\n```bash\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn|err|crit\n```\n\n## Architecture\n\n**Entry point:** `cmd/cc-metric-store/main.go`\n- `run()` → parse flags, init logging/config, connect NATS\n- `runServer()` → init metricstore from cc-backend, start HTTP server\n\n**Key packages:**\n- `internal/api/` - REST endpoints (query, write, free, debug, healthcheck) and JWT auth (Ed25519)\n- `internal/config/` - Config loading and JSON schema validation\n- External: `cc-backend/pkg/metricstore` - actual time-series storage engine\n\n**API endpoints** (all support optional JWT auth):\n- `GET /api/query/` - Query metrics with selectors\n- `POST /api/write/` - Write metrics (InfluxDB line protocol)\n- `POST /api/free/` - Free buffers up to timestamp\n- `GET /api/debug/` - Dump internal state\n- `GET /api/healthcheck/` - Node health status\n\n## Selectors\n\nData is accessed via hierarchical selectors:\n```\n[\"cluster1\", \"host1\", \"cpu0\"] # Specific CPU\n[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\"]] # Multiple CPUs\n[\"cluster1\", \"host1\"] # Entire node (all CPUs implied)\n```\n\n## Configuration\n\nConfig file structure (see `configs/config.json`):\n- `main` - Server address, TLS certs, JWT public key, user/group for privilege drop\n- `metrics` - Per-metric frequency and aggregation strategy (sum/avg/null)\n- `metric-store` - Checkpoints, memory cap, retention, cleanup mode, NATS subscriptions\n- `nats` - Optional NATS connection for receiving metrics\n\n## Test JWT\n\nFor testing with JWT auth enabled:\n```\nREDACTED\n```\n","numLines":78,"startLine":1,"totalLines":78}},"sourceToolAssistantUUID":"6d8f8a5a-b205-4e6b-9624-890fa544a400","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"fa4056f4-bfb0-4b45-8cce-5c75db617ced","isSidechain":false,"promptId":"c1145bfa-2335-4937-b867-95344174aab7","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01K94AMAp7JVFgj5bYW4216J","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md has been updated successfully."}]},"uuid":"f5ac840d-7b82-40fd-8c39-6a5b47d08c96","timestamp":"2026-04-01T13:22:06.470Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md","oldString":"- `metric-store` - Checkpoints, memory cap, retention, cleanup mode, NATS subscriptions","newString":"- `metric-store` - Checkpoints (`file-format` \"wal\"(default)/\"json\", `directory`, `max-wal-size`), `checkpoint-interval`, `memory-cap` (GB), `retention-in-memory`, `num-workers`, cleanup (`mode`, `directory`), `nats-subscriptions`","originalFile":"# CLAUDE.md\n\nThis file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.\n\n## Project Overview\n\ncc-metric-store is an in-memory time-series database for HPC cluster metrics, part of the ClusterCockpit monitoring suite. Data is indexed by a hierarchical tree (cluster → host → socket/cpu/gpu) and accessed via selectors. The core storage engine lives in `cc-backend/pkg/metricstore`; this repo provides the HTTP API wrapper.\n\n## Build Commands\n\n```bash\nmake # Build binary, copy config template, create checkpoint dirs\nmake clean # Clean build cache and binary\nmake distclean # Also remove ./var and config.json\nmake swagger # Regenerate Swagger from source comments\nmake test # Run go build, go vet, go test\n```\n\n## Testing\n\n```bash\ngo test -v ./... # Run tests\ngo test -bench=. -race -v ./... # With benchmarks and race detector\n```\n\nIntegration test scripts in `/endpoint-test-scripts/` for manual API testing.\n\n## Running\n\n```bash\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn|err|crit\n```\n\n## Architecture\n\n**Entry point:** `cmd/cc-metric-store/main.go`\n- `run()` → parse flags, init logging/config, connect NATS\n- `runServer()` → init metricstore from cc-backend, start HTTP server\n\n**Key packages:**\n- `internal/api/` - REST endpoints (query, write, free, debug, healthcheck) and JWT auth (Ed25519)\n- `internal/config/` - Config loading and JSON schema validation\n- External: `cc-backend/pkg/metricstore` - actual time-series storage engine\n\n**API endpoints** (all support optional JWT auth):\n- `GET /api/query/` - Query metrics with selectors\n- `POST /api/write/` - Write metrics (InfluxDB line protocol)\n- `POST /api/free/` - Free buffers up to timestamp\n- `GET /api/debug/` - Dump internal state\n- `GET /api/healthcheck/` - Node health status\n\n## Selectors\n\nData is accessed via hierarchical selectors:\n```\n[\"cluster1\", \"host1\", \"cpu0\"] # Specific CPU\n[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\"]] # Multiple CPUs\n[\"cluster1\", \"host1\"] # Entire node (all CPUs implied)\n```\n\n## Configuration\n\nConfig file structure (see `configs/config.json`):\n- `main` - Server address, TLS certs, JWT public key, user/group for privilege drop\n- `metrics` - Per-metric frequency and aggregation strategy (sum/avg/null)\n- `metric-store` - Checkpoints, memory cap, retention, cleanup mode, NATS subscriptions\n- `nats` - Optional NATS connection for receiving metrics\n\n## Test JWT\n\nFor testing with JWT auth enabled:\n```\nREDACTED\n```\n","structuredPatch":[{"oldStart":66,"oldLines":7,"newStart":66,"newLines":7,"lines":[" Config file structure (see `configs/config.json`):"," - `main` - Server address, TLS certs, JWT public key, user/group for privilege drop"," - `metrics` - Per-metric frequency and aggregation strategy (sum/avg/null)","-- `metric-store` - Checkpoints, memory cap, retention, cleanup mode, NATS subscriptions","+- `metric-store` - Checkpoints (`file-format` \"wal\"(default)/\"json\", `directory`, `max-wal-size`), `checkpoint-interval`, `memory-cap` (GB), `retention-in-memory`, `num-workers`, cleanup (`mode`, `directory`), `nats-subscriptions`"," - `nats` - Optional NATS connection for receiving metrics"," "," ## Test JWT"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"fa4056f4-bfb0-4b45-8cce-5c75db617ced","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"55f5b044-5114-4db8-9999-4d04a53cdfab","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01HCSPb5G3BwBTyhAsy5yvgM","type":"message","role":"assistant","content":[{"type":"text","text":"Build is clean. Here's a summary of all changes made:\n\n**`configs/config.json`** — fixed the `metric-store` section:\n- Replaced `checkpoints.interval` (invalid) with top-level `checkpoint-interval: \"12h\"`\n- Added `checkpoints.file-format: \"wal\"` (new WAL format)\n- Removed `cleanup.interval` (invalid; cleanup interval is derived from `retention-in-memory`)\n\n**`README.md`** — fixed three documentation bugs:\n- `memory-cap`: \"MB\" → \"GB\"\n- `checkpoints.file-format`: listed `\"json\"` as default → `\"wal\"` is the default\n- \"Checkpoint formats\" section: reordered WAL first (as default), JSON second; clarified JSON is for migration\n\n**`CLAUDE.md`** — updated the `metric-store` config summary line to enumerate current fields including `file-format`, `checkpoint-interval`, `num-workers`, `max-wal-size`, and correct GB unit for `memory-cap`"}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":110,"cache_read_input_tokens":54239,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":110},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd82jYdDGZbLTrL5P15E","type":"assistant","uuid":"c1c1a674-4992-4825-a7cc-b22e3d7fa188","timestamp":"2026-04-01T13:22:21.708Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"6cf9e4b5-1a2b-432b-8d2c-b7eab564c24d","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01FF9u65ip85bq7nTJxn2kd2","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package main\n 7→\n 8→import (\n 9→\t\"context\"\n 10→\t\"flag\"\n 11→\t\"fmt\"\n 12→\t\"os\"\n 13→\t\"os/signal\"\n 14→\t\"runtime/debug\"\n 15→\t\"sync\"\n 16→\t\"syscall\"\n 17→\n 18→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 19→\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n 20→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 22→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 23→\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n 24→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 25→\t\"github.com/google/gops/agent\"\n 26→)\n 27→\n 28→const (\n 29→\tenvGOGC = \"GOGC\"\n 30→)\n 31→\n 32→var (\n 33→\tdate string\n 34→\tcommit string\n 35→\tversion string\n 36→)\n 37→\n 38→var (\n 39→\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n 40→\tflagConfigFile, flagLogLevel string\n 41→)\n 42→\n 43→func printVersion() {\n 44→\tfmt.Printf(\"Version:\\t%s\\n\", version)\n 45→\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n 46→\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n 47→}\n 48→\n 49→func runServer(ctx context.Context) error {\n 50→\tvar wg sync.WaitGroup\n 51→\n 52→\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n 53→\tif mscfg == nil {\n 54→\t\treturn fmt.Errorf(\"missing metrics configuration\")\n 55→\t}\n 56→\tconfig.InitMetrics(mscfg)\n 57→\n 58→\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n 59→\tif mscfg == nil {\n 60→\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n 61→\t}\n 62→\n 63→\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n 64→\n 65→\t// Set GC percent if not configured\n 66→\tif os.Getenv(envGOGC) == \"\" {\n 67→\t\tdebug.SetGCPercent(15)\n 68→\t}\n 69→\n 70→\tif config.Keys.BackendURL != \"\" {\n 71→\t\tms := metricstore.GetMemoryStore()\n 72→\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n 73→\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n 74→\t}\n 75→\n 76→\t// Initialize HTTP server\n 77→\tsrv, err := NewServer(version, commit, date)\n 78→\tif err != nil {\n 79→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n 80→\t}\n 81→\n 82→\t// Channel to collect errors from server\n 83→\terrChan := make(chan error, 1)\n 84→\n 85→\t// Start HTTP server\n 86→\twg.Go(func() {\n 87→\t\tif err := srv.Start(ctx); err != nil {\n 88→\t\t\terrChan <- err\n 89→\t\t}\n 90→\t})\n 91→\n 92→\t// Handle shutdown signals\n 93→\twg.Add(1)\n 94→\tsigs := make(chan os.Signal, 1)\n 95→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n 96→\tgo func() {\n 97→\t\tdefer wg.Done()\n 98→\t\tselect {\n 99→\t\tcase <-sigs:\n 100→\t\t\tcclog.Info(\"Shutdown signal received\")\n 101→\t\tcase <-ctx.Done():\n 102→\t\t}\n 103→\n 104→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n 105→\t\tsrv.Shutdown(ctx)\n 106→\t}()\n 107→\n 108→\truntime.SystemdNotify(true, \"running\")\n 109→\n 110→\t// Wait for completion or errors\n 111→\tgo func() {\n 112→\t\twg.Wait()\n 113→\t\tclose(errChan)\n 114→\t}()\n 115→\n 116→\t// Wait for either server startup error or shutdown completion\n 117→\tif err := <-errChan; err != nil {\n 118→\t\treturn err\n 119→\t}\n 120→\n 121→\tcclog.Print(\"Graceful shutdown completed!\")\n 122→\treturn nil\n 123→}\n 124→\n 125→func run() error {\n 126→\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n 127→\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n 128→\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n 129→\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n 130→\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n 131→\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n 132→\tflag.Parse()\n 133→\n 134→\tif flagVersion {\n 135→\t\tprintVersion()\n 136→\t\treturn nil\n 137→\t}\n 138→\n 139→\tcclog.Init(flagLogLevel, flagLogDateTime)\n 140→\n 141→\tif flagGops || config.Keys.Debug.EnableGops {\n 142→\t\tif err := agent.Listen(agent.Options{}); err != nil {\n 143→\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n 144→\t\t}\n 145→\t}\n 146→\n 147→\tccconf.Init(flagConfigFile)\n 148→\n 149→\tcfg := ccconf.GetPackageConfig(\"main\")\n 150→\tif cfg == nil {\n 151→\t\treturn fmt.Errorf(\"main configuration must be present\")\n 152→\t}\n 153→\n 154→\tconfig.Init(cfg)\n 155→\n 156→\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n 157→\tif err := nats.Init(natsConfig); err != nil {\n 158→\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n 159→\t}\n 160→\tnats.Connect()\n 161→\n 162→\tctx, cancel := context.WithCancel(context.Background())\n 163→\tdefer cancel()\n 164→\n 165→\treturn runServer(ctx)\n 166→}\n 167→\n 168→func main() {\n 169→\tif err := run(); err != nil {\n 170→\t\tcclog.Error(err.Error())\n 171→\t\tos.Exit(1)\n 172→\t}\n 173→}\n 174→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"7abf7304-a5c4-4442-b4a7-2fdc7c9ef6a4","timestamp":"2026-04-01T13:23:16.542Z"},"type":"agent_progress","prompt":"","agentId":"a1983d38da575f6da"},"toolUseID":"agent_msg_01UKh7tMZfD4MDEytWz1anv1","parentToolUseID":"toolu_011rvtaPrrCKEj4QaMjM4WS6","uuid":"51738388-08f8-45bd-93ad-960612fd90da","timestamp":"2026-04-01T13:23:16.680Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"51738388-08f8-45bd-93ad-960612fd90da","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:23:16.681Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_015mitKCrCq2jFUK2KXLqrKg","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01YKvuZegvKcLpmPkKmtpYn6","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/server.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":3,"cache_creation_input_tokens":15475,"cache_read_input_tokens":0,"cache_creation":{"ephemeral_5m_input_tokens":15475,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd87DHMBAp19VEWos497","uuid":"3f0b618d-749b-4626-b444-03b2c26f15e1"},"type":"agent_progress","prompt":"","agentId":"a1983d38da575f6da"},"toolUseID":"agent_msg_01UKh7tMZfD4MDEytWz1anv1","parentToolUseID":"toolu_011rvtaPrrCKEj4QaMjM4WS6","uuid":"43c5a12c-7d00-4d56-a7b2-5a6d7ba34d6a","timestamp":"2026-04-01T13:23:16.681Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"43c5a12c-7d00-4d56-a7b2-5a6d7ba34d6a","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01YKvuZegvKcLpmPkKmtpYn6","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package main provides the entry point for the ClusterCockpit metric store server.\n 7→// This file contains HTTP server setup, routing configuration.\n 8→package main\n 9→\n 10→import (\n 11→\t\"context\"\n 12→\t\"crypto/tls\"\n 13→\t\"fmt\"\n 14→\t\"net\"\n 15→\t\"net/http\"\n 16→\t\"time\"\n 17→\n 18→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 19→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 20→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 22→\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n 23→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 24→\thttpSwagger \"github.com/swaggo/http-swagger/v2\"\n 25→)\n 26→\n 27→// Server encapsulates the HTTP server state and dependencies\n 28→type Server struct {\n 29→\trouter *http.ServeMux\n 30→\tserver *http.Server\n 31→}\n 32→\n 33→// NewServer creates and initializes a new Server instance\n 34→func NewServer(version, commit, buildDate string) (*Server, error) {\n 35→\ts := &Server{\n 36→\t\trouter: http.NewServeMux(),\n 37→\t}\n 38→\n 39→\tif err := s.init(); err != nil {\n 40→\t\treturn nil, err\n 41→\t}\n 42→\n 43→\treturn s, nil\n 44→}\n 45→\n 46→func (s *Server) init() error {\n 47→\tapi.MountRoutes(s.router)\n 48→\n 49→\tif flagDev {\n 50→\t\tcclog.Print(\"Enable Swagger UI!\")\n 51→\t\ts.router.HandleFunc(\"GET /swagger/\", httpSwagger.Handler(\n 52→\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Address+\"/swagger/doc.json\")))\n 53→\t}\n 54→\n 55→\treturn nil\n 56→}\n 57→\n 58→// Server timeout defaults (in seconds)\n 59→const (\n 60→\tdefaultReadTimeout = 30\n 61→\tdefaultWriteTimeout = 30\n 62→)\n 63→\n 64→func (s *Server) Start(ctx context.Context) error {\n 65→\t// Use configurable timeouts with defaults\n 66→\treadTimeout := time.Duration(defaultReadTimeout) * time.Second\n 67→\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n 68→\n 69→\ts.server = &http.Server{\n 70→\t\tReadTimeout: readTimeout,\n 71→\t\tWriteTimeout: writeTimeout,\n 72→\t\tHandler: s.router,\n 73→\t\tAddr: config.Keys.Address,\n 74→\t}\n 75→\n 76→\t// Start http or https server\n 77→\tlistener, err := net.Listen(\"tcp\", config.Keys.Address)\n 78→\tif err != nil {\n 79→\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Address, err)\n 80→\t}\n 81→\n 82→\tif config.Keys.CertFile != \"\" && config.Keys.KeyFile != \"\" {\n 83→\t\tcert, err := tls.LoadX509KeyPair(\n 84→\t\t\tconfig.Keys.CertFile, config.Keys.KeyFile)\n 85→\t\tif err != nil {\n 86→\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n 87→\t\t}\n 88→\t\tlistener = tls.NewListener(listener, &tls.Config{\n 89→\t\t\tCertificates: []tls.Certificate{cert},\n 90→\t\t\tCipherSuites: []uint16{\n 91→\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n 92→\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n 93→\t\t\t},\n 94→\t\t\tMinVersion: tls.VersionTLS12,\n 95→\t\t\tPreferServerCipherSuites: true,\n 96→\t\t})\n 97→\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Address)\n 98→\t} else {\n 99→\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Address)\n 100→\t}\n 101→\n 102→\t// Because this program will want to bind to a privileged port (like 80), the listener must\n 103→\t// be established first, then the user can be changed, and after that,\n 104→\t// the actual http server can be started.\n 105→\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n 106→\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n 107→\t}\n 108→\n 109→\t// Handle context cancellation for graceful shutdown\n 110→\tgo func() {\n 111→\t\t<-ctx.Done()\n 112→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n 113→\t\tdefer cancel()\n 114→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n 115→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n 116→\t\t}\n 117→\t}()\n 118→\n 119→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n 120→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n 121→\t}\n 122→\treturn nil\n 123→}\n 124→\n 125→func (s *Server) Shutdown(ctx context.Context) {\n 126→\t// Create a shutdown context with timeout\n 127→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n 128→\tdefer cancel()\n 129→\n 130→\tnc := nats.GetClient()\n 131→\tif nc != nil {\n 132→\t\tnc.Close()\n 133→\t}\n 134→\n 135→\t// First shut down the server gracefully (waiting for all ongoing requests)\n 136→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n 137→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n 138→\t}\n 139→\n 140→\t// Archive all the metric store data\n 141→\tmetricstore.Shutdown()\n 142→}\n 143→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"6f410fea-78a7-4c06-a14c-554f92078b5d","timestamp":"2026-04-01T13:23:16.693Z"},"type":"agent_progress","prompt":"","agentId":"a1983d38da575f6da"},"toolUseID":"agent_msg_01UKh7tMZfD4MDEytWz1anv1","parentToolUseID":"toolu_011rvtaPrrCKEj4QaMjM4WS6","uuid":"20382156-8662-41ed-be59-d84f70b5706b","timestamp":"2026-04-01T13:23:16.701Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"20382156-8662-41ed-be59-d84f70b5706b","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01F9UwPk3HKgtpT39xQAwELw","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides an efficient in-memory time-series metric storage system\n 7→// with support for hierarchical data organization, checkpointing, and archiving.\n 8→//\n 9→// The package organizes metrics in a tree structure (cluster → host → component) and\n 10→// provides concurrent read/write access to metric data with configurable aggregation strategies.\n 11→// Background goroutines handle periodic checkpointing (JSON or WAL/binary format), archiving old data,\n 12→// and enforcing retention policies.\n 13→//\n 14→// Key features:\n 15→// - In-memory metric storage with configurable retention\n 16→// - Hierarchical data organization (selectors)\n 17→// - Concurrent checkpoint/archive workers\n 18→// - Support for sum and average aggregation\n 19→// - NATS integration for metric ingestion via InfluxDB line protocol\n 20→package metricstore\n 21→\n 22→import (\n 23→\t\"bytes\"\n 24→\t\"context\"\n 25→\t\"encoding/json\"\n 26→\t\"errors\"\n 27→\t\"fmt\"\n 28→\t\"runtime\"\n 29→\t\"runtime/debug\"\n 30→\t\"slices\"\n 31→\t\"sync\"\n 32→\t\"time\"\n 33→\n 34→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n 35→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 36→\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n 37→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 38→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 39→)\n 40→\n 41→// GlobalState holds the global state for the metric store with thread-safe access.\n 42→type GlobalState struct {\n 43→\tmu sync.RWMutex\n 44→\tlastRetentionTime int64\n 45→\tselectorsExcluded bool\n 46→}\n 47→\n 48→var (\n 49→\tsingleton sync.Once\n 50→\tmsInstance *MemoryStore\n 51→\t// shutdownFunc stores the context cancellation function created in Init\n 52→\t// and is called during Shutdown to cancel all background goroutines\n 53→\tshutdownFunc context.CancelFunc\n 54→\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n 55→\t// Create a global instance\n 56→\tstate = &GlobalState{}\n 57→)\n 58→\n 59→// NodeProvider provides information about nodes currently in use by running jobs.\n 60→//\n 61→// This interface allows metricstore to query job information without directly\n 62→// depending on the repository package, breaking the import cycle.\n 63→//\n 64→// Implementations should return nodes that are actively processing jobs started\n 65→// before the given timestamp. These nodes will be excluded from retention-based\n 66→// garbage collection to prevent data loss for jobs that are still running or\n 67→// recently completed.\n 68→type NodeProvider interface {\n 69→\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n 70→\t// that are currently in use by jobs that started before the given timestamp.\n 71→\t//\n 72→\t// Parameters:\n 73→\t// - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n 74→\t//\n 75→\t// Returns:\n 76→\t// - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n 77→\t// - Error if the query fails\n 78→\tGetUsedNodes(ts int64) (map[string][]string, error)\n 79→}\n 80→\n 81→// Metric represents a single metric data point to be written to the store.\n 82→type Metric struct {\n 83→\tName string\n 84→\tValue schema.Float\n 85→\t// MetricConfig contains frequency and aggregation settings for this metric.\n 86→\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n 87→\tMetricConfig MetricConfig\n 88→}\n 89→\n 90→// MemoryStore is the main in-memory time-series metric storage implementation.\n 91→//\n 92→// It organizes metrics in a hierarchical tree structure where each level represents\n 93→// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n 94→// store multiple metrics as time-series buffers.\n 95→//\n 96→// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n 97→// All public methods are safe for concurrent use.\n 98→type MemoryStore struct {\n 99→\tMetrics map[string]MetricConfig\n 100→\troot Level\n 101→\tnodeProvider NodeProvider\n 102→}\n 103→\n 104→// Init initializes the metric store from configuration and starts background workers.\n 105→//\n 106→// This function must be called exactly once before any other metricstore operations.\n 107→// It performs the following initialization steps:\n 108→// 1. Validates and decodes the metric store configuration\n 109→// 2. Configures worker pool size (defaults to NumCPU/2+1, max 10)\n 110→// 3. Loads metric configurations from all registered clusters\n 111→// 4. Restores checkpoints within the retention window\n 112→// 5. Starts background workers for retention, checkpointing, archiving, and monitoring\n 113→// 6. Optionally subscribes to NATS for real-time metric ingestion\n 114→//\n 115→// Parameters:\n 116→// - rawConfig: JSON configuration for the metric store (see MetricStoreConfig); may be nil to use defaults\n 117→// - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n 118→// - wg: WaitGroup that will be incremented for each background goroutine started\n 119→//\n 120→// The function will call cclog.Fatal on critical errors during initialization.\n 121→// Use Shutdown() to cleanly stop all background workers started by Init().\n 122→//\n 123→// Note: Signal handling must be implemented by the caller. Call Shutdown() when\n 124→// receiving termination signals to ensure checkpoint data is persisted.\n 125→func Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n 126→\tstartupTime := time.Now()\n 127→\n 128→\tif rawConfig != nil {\n 129→\t\tconfig.Validate(configSchema, rawConfig)\n 130→\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n 131→\t\tdec.DisallowUnknownFields()\n 132→\t\tif err := dec.Decode(&Keys); err != nil {\n 133→\t\t\tcclog.Abortf(\"[METRICSTORE]> Metric Store Config Init: Could not decode config file '%s'.\\nError: %s\\n\", rawConfig, err.Error())\n 134→\t\t}\n 135→\t}\n 136→\n 137→\t// Set NumWorkers from config or use default\n 138→\tif Keys.NumWorkers <= 0 {\n 139→\t\tKeys.NumWorkers = min(runtime.NumCPU()/2+1, DefaultMaxWorkers)\n 140→\t}\n 141→\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n 142→\n 143→\t// Pass the config.MetricStoreKeys\n 144→\tInitMetrics(metrics)\n 145→\n 146→\tms := GetMemoryStore()\n 147→\n 148→\td, err := time.ParseDuration(Keys.RetentionInMemory)\n 149→\tif err != nil {\n 150→\t\tcclog.Fatal(err)\n 151→\t}\n 152→\n 153→\trestoreFrom := startupTime.Add(-d)\n 154→\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n 155→\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n 156→\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n 157→\tif err != nil {\n 158→\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n 159→\t} else {\n 160→\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n 161→\t}\n 162→\n 163→\t// Try to use less memory by forcing a GC run here and then\n 164→\t// lowering the target percentage. The default of 100 means\n 165→\t// that only once the ratio of new allocations execeds the\n 166→\t// previously active heap, a GC is triggered.\n 167→\t// Forcing a GC here will set the \"previously active heap\"\n 168→\t// to a minumum.\n 169→\t// runtime.GC()\n 170→\n 171→\tctx, shutdown := context.WithCancel(context.Background())\n 172→\n 173→\tRetention(wg, ctx)\n 174→\tCheckpointing(wg, ctx)\n 175→\tCleanUp(wg, ctx)\n 176→\tWALStaging(wg, ctx)\n 177→\tMemoryUsageTracker(wg, ctx)\n 178→\n 179→\t// Note: Signal handling has been removed from this function.\n 180→\t// The caller is responsible for handling shutdown signals and calling\n 181→\t// the shutdown() function when appropriate.\n 182→\t// Store the shutdown function for later use by Shutdown()\n 183→\tshutdownFuncMu.Lock()\n 184→\tshutdownFunc = shutdown\n 185→\tshutdownFuncMu.Unlock()\n 186→\n 187→\tif Keys.Subscriptions != nil {\n 188→\t\twg.Go(func() {\n 189→\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n 190→\t\t\t\tcclog.Fatal(err)\n 191→\t\t\t}\n 192→\t\t})\n 193→\t}\n 194→}\n 195→\n 196→// InitMetrics initializes the singleton MemoryStore instance with the given metric configurations.\n 197→//\n 198→// This function must be called before GetMemoryStore() and can only be called once due to\n 199→// the singleton pattern. It assigns each metric an internal offset for efficient buffer indexing.\n 200→//\n 201→// Parameters:\n 202→// - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n 203→//\n 204→// Panics if any metric has Frequency == 0, which indicates an invalid configuration.\n 205→//\n 206→// After this call, the global msInstance is ready for use via GetMemoryStore().\n 207→func InitMetrics(metrics map[string]MetricConfig) {\n 208→\tsingleton.Do(func() {\n 209→\t\toffset := 0\n 210→\t\tfor key, cfg := range metrics {\n 211→\t\t\tif cfg.Frequency == 0 {\n 212→\t\t\t\tpanic(\"[METRICSTORE]> invalid frequency\")\n 213→\t\t\t}\n 214→\n 215→\t\t\tmetrics[key] = MetricConfig{\n 216→\t\t\t\tFrequency: cfg.Frequency,\n 217→\t\t\t\tAggregation: cfg.Aggregation,\n 218→\t\t\t\toffset: offset,\n 219→\t\t\t}\n 220→\t\t\toffset += 1\n 221→\t\t}\n 222→\n 223→\t\tmsInstance = &MemoryStore{\n 224→\t\t\troot: Level{\n 225→\t\t\t\tmetrics: make([]*buffer, len(metrics)),\n 226→\t\t\t\tchildren: make(map[string]*Level),\n 227→\t\t\t},\n 228→\t\t\tMetrics: metrics,\n 229→\t\t}\n 230→\t})\n 231→}\n 232→\n 233→// GetMemoryStore returns the singleton MemoryStore instance.\n 234→//\n 235→// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n 236→//\n 237→// This function is safe for concurrent use after initialization.\n 238→func GetMemoryStore() *MemoryStore {\n 239→\tif msInstance == nil {\n 240→\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n 241→\t}\n 242→\n 243→\treturn msInstance\n 244→}\n 245→\n 246→func (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n 247→\tif metric, ok := ms.Metrics[metricName]; ok {\n 248→\t\treturn metric.Frequency, nil\n 249→\t}\n 250→\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n 251→}\n 252→\n 253→// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n 254→// This must be called during initialization to provide job state information\n 255→// for selective buffer retention during Free operations.\n 256→// If not set, the Free function will fall back to freeing all buffers.\n 257→func (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n 258→\tms.nodeProvider = provider\n 259→}\n 260→\n 261→// Shutdown performs a graceful shutdown of the metric store.\n 262→//\n 263→// This function cancels all background goroutines started by Init() and writes\n 264→// a final checkpoint to disk before returning. It should be called when the\n 265→// application receives a termination signal.\n 266→//\n 267→// The function will:\n 268→// 1. Cancel the context to stop all background workers\n 269→// 2. Close the WAL messages channel if using WAL format\n 270→// 3. Write a final checkpoint to preserve in-memory data\n 271→// 4. Log any errors encountered during shutdown\n 272→//\n 273→// Note: This function blocks until the final checkpoint is written.\n 274→func Shutdown() {\n 275→\ttotalStart := time.Now()\n 276→\n 277→\tshutdownFuncMu.Lock()\n 278→\tdefer shutdownFuncMu.Unlock()\n 279→\tif shutdownFunc != nil {\n 280→\t\tshutdownFunc()\n 281→\t}\n 282→\tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n 283→\n 284→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n 285→\t\t// Signal producers to stop sending before closing channels,\n 286→\t\t// preventing send-on-closed-channel panics from in-flight NATS workers.\n 287→\t\twalShuttingDown.Store(true)\n 288→\t\t// Brief grace period for in-flight DecodeLine calls to complete.\n 289→\t\ttime.Sleep(100 * time.Millisecond)\n 290→\n 291→\t\tfor _, ch := range walShardChs {\n 292→\t\t\tclose(ch)\n 293→\t\t}\n 294→\t\tdrainStart := time.Now()\n 295→\t\tWaitForWALStagingDrain()\n 296→\t\tcclog.Infof(\"[METRICSTORE]> WAL staging goroutines exited (%v)\", time.Since(drainStart))\n 297→\t}\n 298→\n 299→\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n 300→\tcheckpointStart := time.Now()\n 301→\tvar files int\n 302→\tvar err error\n 303→\n 304→\tms := GetMemoryStore()\n 305→\n 306→\tlastCheckpointMu.Lock()\n 307→\tfrom := lastCheckpoint\n 308→\tlastCheckpointMu.Unlock()\n 309→\n 310→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n 311→\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n 312→\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n 313→\t} else {\n 314→\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n 315→\t}\n 316→\n 317→\tif err != nil {\n 318→\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n 319→\t}\n 320→\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))\n 321→}\n 322→\n 323→// Retention starts a background goroutine that periodically frees old metric data.\n 324→//\n 325→// This worker runs at half the retention interval and calls Free() to remove buffers\n 326→// older than the configured retention time. It respects the NodeProvider to preserve\n 327→// data for nodes with active jobs.\n 328→//\n 329→// Parameters:\n 330→// - wg: WaitGroup to signal completion when context is cancelled\n 331→// - ctx: Context for cancellation signal\n 332→//\n 333→// The goroutine exits when ctx is cancelled.\n 334→func Retention(wg *sync.WaitGroup, ctx context.Context) {\n 335→\tms := GetMemoryStore()\n 336→\n 337→\twg.Go(func() {\n 338→\t\td, err := time.ParseDuration(Keys.RetentionInMemory)\n 339→\t\tif err != nil {\n 340→\t\t\tcclog.Fatal(err)\n 341→\t\t}\n 342→\t\tif d <= 0 {\n 343→\t\t\treturn\n 344→\t\t}\n 345→\n 346→\t\ttickInterval := d / 2\n 347→\t\tif tickInterval <= 0 {\n 348→\t\t\treturn\n 349→\t\t}\n 350→\t\tticker := time.NewTicker(tickInterval)\n 351→\t\tdefer ticker.Stop()\n 352→\n 353→\t\tfor {\n 354→\t\t\tselect {\n 355→\t\t\tcase <-ctx.Done():\n 356→\t\t\t\treturn\n 357→\t\t\tcase <-ticker.C:\n 358→\t\t\t\tstate.mu.Lock()\n 359→\n 360→\t\t\t\tt := time.Now().Add(-d)\n 361→\n 362→\t\t\t\tstate.lastRetentionTime = t.Unix()\n 363→\n 364→\t\t\t\tcclog.Infof(\"[METRICSTORE]> start freeing buffers (older than %s)...\\n\", t.Format(time.RFC3339))\n 365→\n 366→\t\t\t\tfreed, err := Free(ms, t)\n 367→\t\t\t\tif err != nil {\n 368→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> freeing up buffers failed: %s\\n\", err.Error())\n 369→\t\t\t\t} else {\n 370→\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d buffers freed\\n\", freed)\n 371→\t\t\t\t}\n 372→\n 373→\t\t\t\tstate.mu.Unlock()\n 374→\n 375→\t\t\t\t// Clean up the buffer pool\n 376→\t\t\t\tbufferPool.Clean(state.lastRetentionTime)\n 377→\t\t\t}\n 378→\t\t}\n 379→\t})\n 380→}\n 381→\n 382→// MemoryUsageTracker starts a background goroutine that monitors memory usage.\n 383→//\n 384→// This worker checks actual process memory usage (via runtime.MemStats) periodically\n 385→// and force-frees buffers if memory exceeds the configured cap. It uses FreeOSMemory()\n 386→// to return memory to the OS after freeing buffers, avoiding aggressive GC that causes\n 387→// performance issues.\n 388→//\n 389→// The tracker logs both actual memory usage (heap allocated) and metric data size for\n 390→// visibility into memory overhead from Go runtime structures and allocations.\n 391→//\n 392→// Parameters:\n 393→// - wg: WaitGroup to signal completion when context is cancelled\n 394→// - ctx: Context for cancellation signal\n 395→//\n 396→// The goroutine exits when ctx is cancelled.\n 397→func MemoryUsageTracker(wg *sync.WaitGroup, ctx context.Context) {\n 398→\tms := GetMemoryStore()\n 399→\n 400→\twg.Go(func() {\n 401→\t\tnormalInterval := DefaultMemoryUsageTrackerInterval\n 402→\t\tfastInterval := 30 * time.Second\n 403→\n 404→\t\tif normalInterval <= 0 {\n 405→\t\t\treturn\n 406→\t\t}\n 407→\n 408→\t\tticker := time.NewTicker(normalInterval)\n 409→\t\tdefer ticker.Stop()\n 410→\t\tcurrentInterval := normalInterval\n 411→\n 412→\t\tfor {\n 413→\t\t\tselect {\n 414→\t\t\tcase <-ctx.Done():\n 415→\t\t\t\treturn\n 416→\t\t\tcase <-ticker.C:\n 417→\t\t\t\tvar mem runtime.MemStats\n 418→\t\t\t\truntime.ReadMemStats(&mem)\n 419→\t\t\t\tactualMemoryGB := float64(mem.Alloc) / 1e9\n 420→\t\t\t\tmetricDataGB := ms.SizeInGB()\n 421→\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory usage: %.2f GB actual (%.2f GB metric data)\", actualMemoryGB, metricDataGB)\n 422→\n 423→\t\t\t\tfreedExcluded := 0\n 424→\t\t\t\tfreedEmergency := 0\n 425→\t\t\t\tvar err error\n 426→\n 427→\t\t\t\tstate.mu.RLock()\n 428→\t\t\t\tlastRetention := state.lastRetentionTime\n 429→\t\t\t\tselectorsExcluded := state.selectorsExcluded\n 430→\t\t\t\tstate.mu.RUnlock()\n 431→\n 432→\t\t\t\tif lastRetention != 0 && selectorsExcluded {\n 433→\t\t\t\t\tfreedExcluded, err = ms.Free(nil, lastRetention)\n 434→\t\t\t\t\tif err != nil {\n 435→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while force-freeing the excluded buffers: %s\", err)\n 436→\t\t\t\t\t}\n 437→\n 438→\t\t\t\t\tif freedExcluded > 0 {\n 439→\t\t\t\t\t\tdebug.FreeOSMemory()\n 440→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d excluded buffers force-freed\", freedExcluded)\n 441→\t\t\t\t\t}\n 442→\t\t\t\t}\n 443→\n 444→\t\t\t\truntime.ReadMemStats(&mem)\n 445→\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n 446→\n 447→\t\t\t\tif actualMemoryGB > float64(Keys.MemoryCap) {\n 448→\t\t\t\t\tcclog.Warnf(\"[METRICSTORE]> memory usage %.2f GB exceeds cap %d GB, starting emergency buffer freeing\", actualMemoryGB, Keys.MemoryCap)\n 449→\n 450→\t\t\t\t\t// Use progressive time-based Free with increasing threshold\n 451→\t\t\t\t\t// instead of ForceFree loop — fewer tree traversals, more effective\n 452→\t\t\t\t\td, parseErr := time.ParseDuration(Keys.RetentionInMemory)\n 453→\t\t\t\t\tif parseErr != nil {\n 454→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> cannot parse retention duration: %s\", parseErr)\n 455→\t\t\t\t\t} else {\n 456→\t\t\t\t\t\tthresholds := []float64{0.75, 0.5, 0.25}\n 457→\t\t\t\t\t\tfor _, fraction := range thresholds {\n 458→\t\t\t\t\t\t\tthreshold := time.Now().Add(-time.Duration(float64(d) * fraction))\n 459→\t\t\t\t\t\t\tfreed, freeErr := ms.Free(nil, threshold.Unix())\n 460→\t\t\t\t\t\t\tif freeErr != nil {\n 461→\t\t\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> error while freeing buffers at %.0f%% retention: %s\", fraction*100, freeErr)\n 462→\t\t\t\t\t\t\t}\n 463→\t\t\t\t\t\t\tfreedEmergency += freed\n 464→\n 465→\t\t\t\t\t\t\tbufferPool.Clear()\n 466→\t\t\t\t\t\t\truntime.GC()\n 467→\t\t\t\t\t\t\truntime.ReadMemStats(&mem)\n 468→\t\t\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n 469→\n 470→\t\t\t\t\t\t\tif actualMemoryGB < float64(Keys.MemoryCap) {\n 471→\t\t\t\t\t\t\t\tbreak\n 472→\t\t\t\t\t\t\t}\n 473→\t\t\t\t\t\t}\n 474→\t\t\t\t\t}\n 475→\n 476→\t\t\t\t\tbufferPool.Clear()\n 477→\t\t\t\t\tdebug.FreeOSMemory()\n 478→\n 479→\t\t\t\t\truntime.ReadMemStats(&mem)\n 480→\t\t\t\t\tactualMemoryGB = float64(mem.Alloc) / 1e9\n 481→\n 482→\t\t\t\t\tif actualMemoryGB >= float64(Keys.MemoryCap) {\n 483→\t\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> after emergency frees (%d buffers), memory usage %.2f GB still at/above cap %d GB\", freedEmergency, actualMemoryGB, Keys.MemoryCap)\n 484→\t\t\t\t\t} else {\n 485→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> emergency freeing complete: %d buffers freed, memory now %.2f GB\", freedEmergency, actualMemoryGB)\n 486→\t\t\t\t\t}\n 487→\t\t\t\t}\n 488→\n 489→\t\t\t\t// Adaptive ticker: check more frequently when memory is high\n 490→\t\t\t\tmemoryRatio := actualMemoryGB / float64(Keys.MemoryCap)\n 491→\t\t\t\tif memoryRatio > 0.8 && currentInterval != fastInterval {\n 492→\t\t\t\t\tticker.Reset(fastInterval)\n 493→\t\t\t\t\tcurrentInterval = fastInterval\n 494→\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to fast check interval (30s)\", memoryRatio*100)\n 495→\t\t\t\t} else if memoryRatio <= 0.8 && currentInterval != normalInterval {\n 496→\t\t\t\t\tticker.Reset(normalInterval)\n 497→\t\t\t\t\tcurrentInterval = normalInterval\n 498→\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> memory at %.0f%% of cap, switching to normal check interval\", memoryRatio*100)\n 499→\t\t\t\t}\n 500→\t\t\t}\n 501→\t\t}\n 502→\t})\n 503→}\n 504→\n 505→// Free removes metric data older than the given time while preserving data for active nodes.\n 506→//\n 507→// This function implements intelligent retention by consulting the NodeProvider (if configured)\n 508→// to determine which nodes are currently in use by running jobs. Data for these nodes is\n 509→// preserved even if older than the retention time.\n 510→//\n 511→// Parameters:\n 512→// - ms: The MemoryStore instance\n 513→// - t: Time threshold - buffers with data older than this will be freed\n 514→//\n 515→// Returns:\n 516→// - Number of buffers freed\n 517→// - Error if NodeProvider query fails\n 518→//\n 519→// Behavior:\n 520→// - If no NodeProvider is set: frees all buffers older than t\n 521→// - If NodeProvider returns empty map: frees all buffers older than t\n 522→// - Otherwise: preserves buffers for nodes returned by GetUsedNodes(), frees others\n 523→func Free(ms *MemoryStore, t time.Time) (int, error) {\n 524→\t// If no NodeProvider is configured, free all buffers older than t\n 525→\tif ms.nodeProvider == nil {\n 526→\t\treturn ms.Free(nil, t.Unix())\n 527→\t}\n 528→\n 529→\texcludeSelectors, err := ms.nodeProvider.GetUsedNodes(t.Unix())\n 530→\tif err != nil {\n 531→\t\treturn 0, err\n 532→\t}\n 533→\n 534→\tswitch lenMap := len(excludeSelectors); lenMap {\n 535→\n 536→\t// If the length of the map returned by GetUsedNodes() is 0,\n 537→\t// then use default Free method with nil selector\n 538→\tcase 0:\n 539→\t\tstate.selectorsExcluded = false\n 540→\t\treturn ms.Free(nil, t.Unix())\n 541→\n 542→\t// Else formulate selectors, exclude those from the map\n 543→\t// and free the rest of the selectors\n 544→\tdefault:\n 545→\t\tstate.selectorsExcluded = true\n 546→\t\tselectors := GetSelectors(ms, excludeSelectors)\n 547→\t\treturn FreeSelected(ms, selectors, t)\n 548→\t}\n 549→}\n 550→\n 551→// FreeSelected frees buffers for specific selectors while preserving others.\n 552→//\n 553→// This function is used when we want to retain some specific nodes beyond the retention time.\n 554→// It iterates through the provided selectors and frees their associated buffers.\n 555→//\n 556→// Parameters:\n 557→// - ms: The MemoryStore instance\n 558→// - selectors: List of selector paths to free (e.g., [[\"cluster1\", \"node1\"], [\"cluster2\", \"node2\"]])\n 559→// - t: Time threshold for freeing buffers\n 560→//\n 561→// Returns the total number of buffers freed and any error encountered.\n 562→func FreeSelected(ms *MemoryStore, selectors [][]string, t time.Time) (int, error) {\n 563→\tfreed := 0\n 564→\n 565→\tfor _, selector := range selectors {\n 566→\n 567→\t\tfreedBuffers, err := ms.Free(selector, t.Unix())\n 568→\t\tif err != nil {\n 569→\t\t\tcclog.Errorf(\"error while freeing selected buffers: %#v\", err)\n 570→\t\t}\n 571→\t\tfreed += freedBuffers\n 572→\n 573→\t}\n 574→\n 575→\treturn freed, nil\n 576→}\n 577→\n 578→// GetSelectors returns all selectors at depth 2 (cluster/node level) that are NOT in the exclusion map.\n 579→//\n 580→// This function generates a list of selectors whose buffers should be freed by excluding\n 581→// selectors that correspond to nodes currently in use by running jobs.\n 582→//\n 583→// Parameters:\n 584→// - ms: The MemoryStore instance\n 585→// - excludeSelectors: Map of cluster names to node hostnames that should NOT be freed\n 586→//\n 587→// Returns a list of selectors ([]string paths) that can be safely freed.\n 588→//\n 589→// Example:\n 590→//\n 591→//\tIf the tree has paths [\"emmy\", \"node001\"] and [\"emmy\", \"node002\"],\n 592→//\tand excludeSelectors contains {\"emmy\": [\"node001\"]},\n 593→//\tthen only [[\"emmy\", \"node002\"]] is returned.\n 594→func GetSelectors(ms *MemoryStore, excludeSelectors map[string][]string) [][]string {\n 595→\tallSelectors := ms.GetPaths(2)\n 596→\n 597→\tfilteredSelectors := make([][]string, 0, len(allSelectors))\n 598→\n 599→\tfor _, path := range allSelectors {\n 600→\t\tif len(path) < 2 {\n 601→\t\t\tcontinue\n 602→\t\t}\n 603→\n 604→\t\tkey := path[0] // The \"Key\" (Level 1)\n 605→\t\tvalue := path[1] // The \"Value\" (Level 2)\n 606→\n 607→\t\texclude := false\n 608→\n 609→\t\t// Check if the key exists in our exclusion map\n 610→\t\tif excludedValues, exists := excludeSelectors[key]; exists {\n 611→\t\t\t// The key exists, now check if the specific value is in the exclusion list\n 612→\t\t\tif slices.Contains(excludedValues, value) {\n 613→\t\t\t\texclude = true\n 614→\t\t\t}\n 615→\t\t}\n 616→\n 617→\t\tif !exclude {\n 618→\t\t\tfilteredSelectors = append(filteredSelectors, path)\n 619→\t\t}\n 620→\t}\n 621→\n 622→\treturn filteredSelectors\n 623→}\n 624→\n 625→// GetPaths returns a list of lists (paths) to the specified depth.\n 626→func (ms *MemoryStore) GetPaths(targetDepth int) [][]string {\n 627→\tvar results [][]string\n 628→\n 629→\t// Start recursion. Initial path is empty.\n 630→\t// We treat Root as depth 0.\n 631→\tms.root.collectPaths(0, targetDepth, []string{}, &results)\n 632→\n 633→\treturn results\n 634→}\n 635→\n 636→// Write all values in `metrics` to the level specified by `selector` for time `ts`.\n 637→// Look at `findLevelOrCreate` for how selectors work.\n 638→func (m *MemoryStore) Write(selector []string, ts int64, metrics []Metric) error {\n 639→\tvar ok bool\n 640→\tfor i, metric := range metrics {\n 641→\t\tif metric.MetricConfig.Frequency == 0 {\n 642→\t\t\tmetric.MetricConfig, ok = m.Metrics[metric.Name]\n 643→\t\t\tif !ok {\n 644→\t\t\t\tcclog.Debugf(\"[METRICSTORE]> Unknown metric '%s' in Write() - skipping\", metric.Name)\n 645→\t\t\t\tmetric.MetricConfig.Frequency = 0\n 646→\t\t\t}\n 647→\t\t\tmetrics[i] = metric\n 648→\t\t}\n 649→\t}\n 650→\n 651→\treturn m.WriteToLevel(&m.root, selector, ts, metrics)\n 652→}\n 653→\n 654→func (m *MemoryStore) GetLevel(selector []string) *Level {\n 655→\treturn m.root.findLevelOrCreate(selector, len(m.Metrics))\n 656→}\n 657→\n 658→// WriteToLevel assumes that `minfo` in `metrics` is filled in\n 659→func (m *MemoryStore) WriteToLevel(l *Level, selector []string, ts int64, metrics []Metric) error {\n 660→\tl = l.findLevelOrCreate(selector, len(m.Metrics))\n 661→\tl.lock.Lock()\n 662→\tdefer l.lock.Unlock()\n 663→\n 664→\tfor _, metric := range metrics {\n 665→\t\tif metric.MetricConfig.Frequency == 0 {\n 666→\t\t\tcontinue\n 667→\t\t}\n 668→\n 669→\t\tb := l.metrics[metric.MetricConfig.offset]\n 670→\t\tif b == nil {\n 671→\t\t\t// First write to this metric and level\n 672→\t\t\tb = newBuffer(ts, metric.MetricConfig.Frequency)\n 673→\t\t\tl.metrics[metric.MetricConfig.offset] = b\n 674→\t\t}\n 675→\n 676→\t\tnb, err := b.write(ts, metric.Value)\n 677→\t\tif err != nil {\n 678→\t\t\treturn err\n 679→\t\t}\n 680→\n 681→\t\t// Last write created a new buffer...\n 682→\t\tif b != nb {\n 683→\t\t\tl.metrics[metric.MetricConfig.offset] = nb\n 684→\t\t}\n 685→\t}\n 686→\treturn nil\n 687→}\n 688→\n 689→// Read returns all values for metric `metric` from `from` to `to` for the selected level(s).\n 690→// If the level does not hold the metric itself, the data will be aggregated recursively from the children.\n 691→// The second and third return value are the actual from/to for the data. Those can be different from\n 692→// the range asked for if no data was available.\n 693→func (m *MemoryStore) Read(selector util.Selector, metric string, from, to, resolution int64) ([]schema.Float, int64, int64, int64, error) {\n 694→\tif from > to {\n 695→\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid time range\")\n 696→\t}\n 697→\n 698→\tminfo, ok := m.Metrics[metric]\n 699→\tif !ok {\n 700→\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> unknown metric: \" + metric)\n 701→\t}\n 702→\n 703→\tn, data := 0, make([]schema.Float, (to-from)/minfo.Frequency+1)\n 704→\n 705→\terr := m.root.findBuffers(selector, minfo.offset, func(b *buffer) error {\n 706→\t\tcdata, cfrom, cto, err := b.read(from, to, data)\n 707→\t\tif err != nil {\n 708→\t\t\treturn err\n 709→\t\t}\n 710→\n 711→\t\tif n == 0 {\n 712→\t\t\tfrom, to = cfrom, cto\n 713→\t\t} else if from != cfrom || to != cto || len(data) != len(cdata) {\n 714→\t\t\tmissingfront, missingback := int((from-cfrom)/minfo.Frequency), int((to-cto)/minfo.Frequency)\n 715→\t\t\tif missingfront != 0 {\n 716→\t\t\t\treturn ErrDataDoesNotAlignMissingFront\n 717→\t\t\t}\n 718→\n 719→\t\t\tnewlen := len(cdata) - missingback\n 720→\t\t\tif newlen < 1 {\n 721→\t\t\t\treturn ErrDataDoesNotAlignMissingBack\n 722→\t\t\t}\n 723→\t\t\tcdata = cdata[0:newlen]\n 724→\t\t\tif len(cdata) != len(data) {\n 725→\t\t\t\treturn ErrDataDoesNotAlignDataLenMismatch\n 726→\t\t\t}\n 727→\n 728→\t\t\tfrom, to = cfrom, cto\n 729→\t\t}\n 730→\n 731→\t\tdata = cdata\n 732→\t\tn += 1\n 733→\t\treturn nil\n 734→\t})\n 735→\n 736→\tif err != nil {\n 737→\t\treturn nil, 0, 0, 0, err\n 738→\t} else if n == 0 {\n 739→\t\treturn nil, 0, 0, 0, ErrNoHostOrMetric\n 740→\t} else if n > 1 {\n 741→\t\tif minfo.Aggregation == AvgAggregation {\n 742→\t\t\tnormalize := 1. / schema.Float(n)\n 743→\t\t\tfor i := 0; i < len(data); i++ {\n 744→\t\t\t\tdata[i] *= normalize\n 745→\t\t\t}\n 746→\t\t} else if minfo.Aggregation != SumAggregation {\n 747→\t\t\treturn nil, 0, 0, 0, errors.New(\"[METRICSTORE]> invalid aggregation\")\n 748→\t\t}\n 749→\t}\n 750→\n 751→\tdata, resolution, err = resampler.LargestTriangleThreeBucket(data, minfo.Frequency, resolution)\n 752→\tif err != nil {\n 753→\t\treturn nil, 0, 0, 0, err\n 754→\t}\n 755→\n 756→\treturn data, from, to, resolution, nil\n 757→}\n 758→\n 759→// Free releases all buffers for the selected level and all its children that\n 760→// contain only values older than `t`.\n 761→func (m *MemoryStore) Free(selector []string, t int64) (int, error) {\n 762→\treturn m.GetLevel(selector).free(t)\n 763→}\n 764→\n 765→// ForceFree unconditionally removes the oldest buffer from each metric chain.\n 766→func (m *MemoryStore) ForceFree() (int, error) {\n 767→\treturn m.GetLevel(nil).forceFree()\n 768→}\n 769→\n 770→func (m *MemoryStore) FreeAll() error {\n 771→\tm.root.lock.Lock()\n 772→\tdefer m.root.lock.Unlock()\n 773→\n 774→\tfor k := range m.root.children {\n 775→\t\tdelete(m.root.children, k)\n 776→\t}\n 777→\n 778→\treturn nil\n 779→}\n 780→\n 781→func (m *MemoryStore) SizeInBytes() int64 {\n 782→\treturn m.root.sizeInBytes()\n 783→}\n 784→\n 785→func (m *MemoryStore) SizeInGB() float64 {\n 786→\treturn float64(m.root.sizeInBytes()) / 1e9\n 787→}\n 788→\n 789→// ListChildren , given a selector, returns a list of all children of the level\n 790→// selected.\n 791→func (m *MemoryStore) ListChildren(selector []string) []string {\n 792→\tlvl := &m.root\n 793→\tfor lvl != nil && len(selector) != 0 {\n 794→\t\tlvl.lock.RLock()\n 795→\t\tnext := lvl.children[selector[0]]\n 796→\t\tlvl.lock.RUnlock()\n 797→\t\tlvl = next\n 798→\t\tselector = selector[1:]\n 799→\t}\n 800→\n 801→\tif lvl == nil {\n 802→\t\treturn nil\n 803→\t}\n 804→\n 805→\tlvl.lock.RLock()\n 806→\tdefer lvl.lock.RUnlock()\n 807→\n 808→\tchildren := make([]string, 0, len(lvl.children))\n 809→\tfor child := range lvl.children {\n 810→\t\tchildren = append(children, child)\n 811→\t}\n 812→\n 813→\treturn children\n 814→}\n 815→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"fbde8be6-0fe5-4f74-985e-5178d0dd0f35","timestamp":"2026-04-01T13:23:16.708Z"},"type":"agent_progress","prompt":"","agentId":"a1983d38da575f6da"},"toolUseID":"agent_msg_01UKh7tMZfD4MDEytWz1anv1","parentToolUseID":"toolu_011rvtaPrrCKEj4QaMjM4WS6","uuid":"7953304b-bbf4-47cc-8303-5193e3cd09d8","timestamp":"2026-04-01T13:23:16.708Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"7953304b-bbf4-47cc-8303-5193e3cd09d8","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Agent","command":"entire hooks claude-code post-task"},"parentToolUseID":"toolu_011rvtaPrrCKEj4QaMjM4WS6","toolUseID":"toolu_011rvtaPrrCKEj4QaMjM4WS6","timestamp":"2026-04-01T13:23:32.340Z","uuid":"090f1a3f-eae2-43cf-b3c2-133874bdd066","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"7055c656-caa9-48fd-9dcd-2ec5760864c0","isSidechain":false,"promptId":"a565e195-bf4d-4f03-9e9d-a090ff07f60c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_011rvtaPrrCKEj4QaMjM4WS6","type":"tool_result","content":[{"type":"text","text":"Now I have all three files. Let me analyze the initialization and shutdown sequences in detail.\n\n## Analysis Report\n\nI've read all three files completely. Here's my detailed analysis:\n\n### 1. **Init() Parameters and Side Effects** (metricstore.go lines 125-194)\n\nInit() expects:\n- `rawConfig`: JSON configuration (may be nil)\n- `metrics`: Map of metric names to MetricConfig\n- `wg`: WaitGroup pointer\n\nSide effects:\n- Decodes and validates configuration\n- Calculates NumWorkers from config or defaults to `min(runtime.NumCPU()/2+1, 10)`\n- Calls `InitMetrics(metrics)` to initialize the singleton\n- Loads checkpoints from disk via `FromCheckpointFiles()`\n- **Creates a context and cancellation function** at line 171: `ctx, shutdown := context.WithCancel(context.Background())`\n- Starts 5 background goroutines by calling:\n - `Retention(wg, ctx)` \n - `Checkpointing(wg, ctx)`\n - `CleanUp(wg, ctx)`\n - `WALStaging(wg, ctx)`\n - `MemoryUsageTracker(wg, ctx)`\n- **Stores the cancellation function in global `shutdownFunc`** (lines 183-185)\n- If NATS subscriptions are configured, starts `ReceiveNats()` goroutine (lines 187-193)\n\n**Each background goroutine calls `wg.Go()` to register itself with the WaitGroup.**\n\n### 2. **Shutdown() Sequence** (metricstore.go lines 274-321)\n\nThe shutdown sequence in metricstore:\n1. **Cancels all background goroutines** by calling `shutdownFunc()` (line 280)\n2. For WAL format checkpoints:\n - Sets `walShuttingDown` flag to prevent panics\n - Sleeps 100ms to allow in-flight operations to complete\n - Closes WAL channels\n - Waits for WAL staging goroutines to drain\n3. **Writes a final checkpoint** to disk (lines 299-315)\n\n**Critical issue:** The shutdown function does NOT wait for the background goroutines to actually exit via `wg.Wait()`.\n\n### 3. **Server.Shutdown() Sequence** (server.go lines 125-142)\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n defer cancel()\n \n nc := nats.GetClient()\n if nc != nil {\n nc.Close() // ← Close NATS FIRST\n }\n \n if err := s.server.Shutdown(shutdownCtx); err != nil { // ← Shutdown HTTP SECOND\n cclog.Errorf(\"Server shutdown error: %v\", err)\n }\n \n metricstore.Shutdown() // ← Shutdown METRICSTORE LAST\n}\n```\n\n**Order:** NATS → HTTP Server → Metricstore\n\n### 4. **WaitGroup Usage in cc-metric-store**\n\nLooking at main.go (runServer function, lines 49-123):\n- A WaitGroup `wg` is created at line 50\n- Passed to `metricstore.Init()` at line 63\n- Background goroutines register via `wg.Go()` inside metricstore\n- HTTP server is started via `wg.Go()` at line 86\n- Signal handler registered via `wg.Add(1)` at line 93\n- **At line 112: `wg.Wait()` is called** in a goroutine that closes errChan\n- However, **`wg.Wait()` is never explicitly awaited** in runServer itself\n\nThe shutdown flow:\n1. Signal handler receives signal → calls `srv.Shutdown(ctx)` (line 105)\n2. `srv.Shutdown()` calls `metricstore.Shutdown()` (server.go line 141)\n3. `metricstore.Shutdown()` cancels context (wakes up background workers)\n4. HTTP server's `Serve()` returns when context is cancelled\n5. `wg.Wait()` completes (all goroutines done)\n6. `errChan` is closed\n7. `runServer()` returns\n\n### 5. **GOGC Settings**\n\nIn main.go lines 65-68:\n```go\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\n**Issue:** This is set AFTER `metricstore.Init()` is called at line 63. The GC percent is only set to 15% after the metricstore has already loaded checkpoints and started workers.\n\n### 6. **gops Initialization Order**\n\nIn main.go run() function:\n1. Line 126-132: Parse flags (gops flag parsed here)\n2. Line 139: Initialize logging\n3. **Lines 141-145: gops agent starts BEFORE config is loaded** ← **PROBLEM**\n4. Line 147: `ccconf.Init(flagConfigFile)` loads config\n5. Line 149: Main config is retrieved\n\nThe gops agent is started at line 142 **before** the configuration is loaded from disk at line 147. However, line 141 checks `config.Keys.Debug.EnableGops` which hasn't been loaded yet, so this condition will be false on first check.\n\n---\n\n## Summary of Issues Found\n\n1. **WaitGroup not explicitly waited in runServer context**: The `wg.Wait()` happens in a background goroutine, not blocking the main flow. However, the error channel mechanism ensures proper sequencing.\n\n2. **GOGC set after metricstore.Init()**: The GC percent (15%) is set after checkpoint loading and worker startup, not before.\n\n3. **gops initialization timing**: The gops agent starts before the config file is loaded, though it uses a flag check that won't be true at that point.\n\n4. **metricstore.Shutdown() doesn't wait for workers**: The function cancels the context but doesn't explicitly wait for all background goroutines to exit via the WaitGroup. The final checkpoint write happens immediately after cancellation, which could race with in-flight operations."},{"type":"text","text":"agentId: a1983d38da575f6da (use SendMessage with to: 'a1983d38da575f6da' to continue this agent)\n<usage>total_tokens: 32789\ntool_uses: 3\nduration_ms: 17549</usage>"}]}]},"uuid":"1e0d849f-4d0b-4ab4-996e-ad5963403acf","timestamp":"2026-04-01T13:23:32.340Z","toolUseResult":{"status":"completed","prompt":"Read the following files completely and return their full content:\n\n1. /Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go — focus on the Init() and Shutdown() functions and any global vars they use\n2. /Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go — already known, but confirm the runServer() and run() functions\n3. /Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/server.go — focus on Shutdown() sequence\n\nI need to compare exactly:\n- What Init() expects as parameters and what side effects it has\n- What Shutdown() does step by step\n- Whether the cc-metric-store's server.go Shutdown() calls metricstore.Shutdown() at the right time relative to NATS and HTTP shutdown\n- Whether the WaitGroup passed to Init() is waited on somewhere in cc-metric-store\n- Whether GOGC / GC settings are still relevant\n- Whether gops initialization order is correct (it happens before config is loaded in run())","agentId":"a1983d38da575f6da","content":[{"type":"text","text":"Now I have all three files. Let me analyze the initialization and shutdown sequences in detail.\n\n## Analysis Report\n\nI've read all three files completely. Here's my detailed analysis:\n\n### 1. **Init() Parameters and Side Effects** (metricstore.go lines 125-194)\n\nInit() expects:\n- `rawConfig`: JSON configuration (may be nil)\n- `metrics`: Map of metric names to MetricConfig\n- `wg`: WaitGroup pointer\n\nSide effects:\n- Decodes and validates configuration\n- Calculates NumWorkers from config or defaults to `min(runtime.NumCPU()/2+1, 10)`\n- Calls `InitMetrics(metrics)` to initialize the singleton\n- Loads checkpoints from disk via `FromCheckpointFiles()`\n- **Creates a context and cancellation function** at line 171: `ctx, shutdown := context.WithCancel(context.Background())`\n- Starts 5 background goroutines by calling:\n - `Retention(wg, ctx)` \n - `Checkpointing(wg, ctx)`\n - `CleanUp(wg, ctx)`\n - `WALStaging(wg, ctx)`\n - `MemoryUsageTracker(wg, ctx)`\n- **Stores the cancellation function in global `shutdownFunc`** (lines 183-185)\n- If NATS subscriptions are configured, starts `ReceiveNats()` goroutine (lines 187-193)\n\n**Each background goroutine calls `wg.Go()` to register itself with the WaitGroup.**\n\n### 2. **Shutdown() Sequence** (metricstore.go lines 274-321)\n\nThe shutdown sequence in metricstore:\n1. **Cancels all background goroutines** by calling `shutdownFunc()` (line 280)\n2. For WAL format checkpoints:\n - Sets `walShuttingDown` flag to prevent panics\n - Sleeps 100ms to allow in-flight operations to complete\n - Closes WAL channels\n - Waits for WAL staging goroutines to drain\n3. **Writes a final checkpoint** to disk (lines 299-315)\n\n**Critical issue:** The shutdown function does NOT wait for the background goroutines to actually exit via `wg.Wait()`.\n\n### 3. **Server.Shutdown() Sequence** (server.go lines 125-142)\n\n```go\nfunc (s *Server) Shutdown(ctx context.Context) {\n shutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n defer cancel()\n \n nc := nats.GetClient()\n if nc != nil {\n nc.Close() // ← Close NATS FIRST\n }\n \n if err := s.server.Shutdown(shutdownCtx); err != nil { // ← Shutdown HTTP SECOND\n cclog.Errorf(\"Server shutdown error: %v\", err)\n }\n \n metricstore.Shutdown() // ← Shutdown METRICSTORE LAST\n}\n```\n\n**Order:** NATS → HTTP Server → Metricstore\n\n### 4. **WaitGroup Usage in cc-metric-store**\n\nLooking at main.go (runServer function, lines 49-123):\n- A WaitGroup `wg` is created at line 50\n- Passed to `metricstore.Init()` at line 63\n- Background goroutines register via `wg.Go()` inside metricstore\n- HTTP server is started via `wg.Go()` at line 86\n- Signal handler registered via `wg.Add(1)` at line 93\n- **At line 112: `wg.Wait()` is called** in a goroutine that closes errChan\n- However, **`wg.Wait()` is never explicitly awaited** in runServer itself\n\nThe shutdown flow:\n1. Signal handler receives signal → calls `srv.Shutdown(ctx)` (line 105)\n2. `srv.Shutdown()` calls `metricstore.Shutdown()` (server.go line 141)\n3. `metricstore.Shutdown()` cancels context (wakes up background workers)\n4. HTTP server's `Serve()` returns when context is cancelled\n5. `wg.Wait()` completes (all goroutines done)\n6. `errChan` is closed\n7. `runServer()` returns\n\n### 5. **GOGC Settings**\n\nIn main.go lines 65-68:\n```go\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\n**Issue:** This is set AFTER `metricstore.Init()` is called at line 63. The GC percent is only set to 15% after the metricstore has already loaded checkpoints and started workers.\n\n### 6. **gops Initialization Order**\n\nIn main.go run() function:\n1. Line 126-132: Parse flags (gops flag parsed here)\n2. Line 139: Initialize logging\n3. **Lines 141-145: gops agent starts BEFORE config is loaded** ← **PROBLEM**\n4. Line 147: `ccconf.Init(flagConfigFile)` loads config\n5. Line 149: Main config is retrieved\n\nThe gops agent is started at line 142 **before** the configuration is loaded from disk at line 147. However, line 141 checks `config.Keys.Debug.EnableGops` which hasn't been loaded yet, so this condition will be false on first check.\n\n---\n\n## Summary of Issues Found\n\n1. **WaitGroup not explicitly waited in runServer context**: The `wg.Wait()` happens in a background goroutine, not blocking the main flow. However, the error channel mechanism ensures proper sequencing.\n\n2. **GOGC set after metricstore.Init()**: The GC percent (15%) is set after checkpoint loading and worker startup, not before.\n\n3. **gops initialization timing**: The gops agent starts before the config file is loaded, though it uses a flag check that won't be true at that point.\n\n4. **metricstore.Shutdown() doesn't wait for workers**: The function cancels the context but doesn't explicitly wait for all background goroutines to exit via the WaitGroup. The final checkpoint write happens immediately after cancellation, which could race with in-flight operations."}],"totalDurationMs":17549,"totalTokens":32789,"totalToolUseCount":3,"usage":{"input_tokens":4195,"cache_creation_input_tokens":11599,"cache_read_input_tokens":15475,"output_tokens":1520,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":11599},"inference_geo":"","iterations":[],"speed":"standard"}},"sourceToolAssistantUUID":"7055c656-caa9-48fd-9dcd-2ec5760864c0","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"1e0d849f-4d0b-4ab4-996e-ad5963403acf","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01HNSnTaQfzBEubYoHSdoqSQ","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2022,"cache_read_input_tokens":56329,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":2022},"output_tokens":30,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd88XF7phUWHXSdCLWUP","type":"assistant","uuid":"73faba6b-bc17-4629-a14c-3c5cdbbee345","timestamp":"2026-04-01T13:23:37.389Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"8eeb9845-6070-43bc-9597-8bd379043f5a","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_01NBbfNn1kCuZZMvaURJaRnh","toolUseID":"toolu_01NBbfNn1kCuZZMvaURJaRnh","timestamp":"2026-04-01T13:23:39.875Z","uuid":"2448af8b-7e1c-467f-82bc-b7505563e76b","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"8eeb9845-6070-43bc-9597-8bd379043f5a","isSidechain":false,"promptId":"a565e195-bf4d-4f03-9e9d-a090ff07f60c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01NBbfNn1kCuZZMvaURJaRnh","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package main provides the entry point for the ClusterCockpit metric store server.\n 7→// This file contains HTTP server setup, routing configuration.\n 8→package main\n 9→\n 10→import (\n 11→\t\"context\"\n 12→\t\"crypto/tls\"\n 13→\t\"fmt\"\n 14→\t\"net\"\n 15→\t\"net/http\"\n 16→\t\"time\"\n 17→\n 18→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 19→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 20→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 22→\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n 23→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 24→\thttpSwagger \"github.com/swaggo/http-swagger/v2\"\n 25→)\n 26→\n 27→// Server encapsulates the HTTP server state and dependencies\n 28→type Server struct {\n 29→\trouter *http.ServeMux\n 30→\tserver *http.Server\n 31→}\n 32→\n 33→// NewServer creates and initializes a new Server instance\n 34→func NewServer(version, commit, buildDate string) (*Server, error) {\n 35→\ts := &Server{\n 36→\t\trouter: http.NewServeMux(),\n 37→\t}\n 38→\n 39→\tif err := s.init(); err != nil {\n 40→\t\treturn nil, err\n 41→\t}\n 42→\n 43→\treturn s, nil\n 44→}\n 45→\n 46→func (s *Server) init() error {\n 47→\tapi.MountRoutes(s.router)\n 48→\n 49→\tif flagDev {\n 50→\t\tcclog.Print(\"Enable Swagger UI!\")\n 51→\t\ts.router.HandleFunc(\"GET /swagger/\", httpSwagger.Handler(\n 52→\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Address+\"/swagger/doc.json\")))\n 53→\t}\n 54→\n 55→\treturn nil\n 56→}\n 57→\n 58→// Server timeout defaults (in seconds)\n 59→const (\n 60→\tdefaultReadTimeout = 30\n 61→\tdefaultWriteTimeout = 30\n 62→)\n 63→\n 64→func (s *Server) Start(ctx context.Context) error {\n 65→\t// Use configurable timeouts with defaults\n 66→\treadTimeout := time.Duration(defaultReadTimeout) * time.Second\n 67→\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n 68→\n 69→\ts.server = &http.Server{\n 70→\t\tReadTimeout: readTimeout,\n 71→\t\tWriteTimeout: writeTimeout,\n 72→\t\tHandler: s.router,\n 73→\t\tAddr: config.Keys.Address,\n 74→\t}\n 75→\n 76→\t// Start http or https server\n 77→\tlistener, err := net.Listen(\"tcp\", config.Keys.Address)\n 78→\tif err != nil {\n 79→\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Address, err)\n 80→\t}\n 81→\n 82→\tif config.Keys.CertFile != \"\" && config.Keys.KeyFile != \"\" {\n 83→\t\tcert, err := tls.LoadX509KeyPair(\n 84→\t\t\tconfig.Keys.CertFile, config.Keys.KeyFile)\n 85→\t\tif err != nil {\n 86→\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n 87→\t\t}\n 88→\t\tlistener = tls.NewListener(listener, &tls.Config{\n 89→\t\t\tCertificates: []tls.Certificate{cert},\n 90→\t\t\tCipherSuites: []uint16{\n 91→\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n 92→\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n 93→\t\t\t},\n 94→\t\t\tMinVersion: tls.VersionTLS12,\n 95→\t\t\tPreferServerCipherSuites: true,\n 96→\t\t})\n 97→\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Address)\n 98→\t} else {\n 99→\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Address)\n 100→\t}\n 101→\n 102→\t// Because this program will want to bind to a privileged port (like 80), the listener must\n 103→\t// be established first, then the user can be changed, and after that,\n 104→\t// the actual http server can be started.\n 105→\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n 106→\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n 107→\t}\n 108→\n 109→\t// Handle context cancellation for graceful shutdown\n 110→\tgo func() {\n 111→\t\t<-ctx.Done()\n 112→\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n 113→\t\tdefer cancel()\n 114→\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n 115→\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n 116→\t\t}\n 117→\t}()\n 118→\n 119→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n 120→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n 121→\t}\n 122→\treturn nil\n 123→}\n 124→\n 125→func (s *Server) Shutdown(ctx context.Context) {\n 126→\t// Create a shutdown context with timeout\n 127→\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n 128→\tdefer cancel()\n 129→\n 130→\tnc := nats.GetClient()\n 131→\tif nc != nil {\n 132→\t\tnc.Close()\n 133→\t}\n 134→\n 135→\t// First shut down the server gracefully (waiting for all ongoing requests)\n 136→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n 137→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n 138→\t}\n 139→\n 140→\t// Archive all the metric store data\n 141→\tmetricstore.Shutdown()\n 142→}\n 143→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"00d114d7-ac1d-4064-93a7-5bd702f46e90","timestamp":"2026-04-01T13:23:39.875Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/server.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// Package main provides the entry point for the ClusterCockpit metric store server.\n// This file contains HTTP server setup, routing configuration.\npackage main\n\nimport (\n\t\"context\"\n\t\"crypto/tls\"\n\t\"fmt\"\n\t\"net\"\n\t\"net/http\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\thttpSwagger \"github.com/swaggo/http-swagger/v2\"\n)\n\n// Server encapsulates the HTTP server state and dependencies\ntype Server struct {\n\trouter *http.ServeMux\n\tserver *http.Server\n}\n\n// NewServer creates and initializes a new Server instance\nfunc NewServer(version, commit, buildDate string) (*Server, error) {\n\ts := &Server{\n\t\trouter: http.NewServeMux(),\n\t}\n\n\tif err := s.init(); err != nil {\n\t\treturn nil, err\n\t}\n\n\treturn s, nil\n}\n\nfunc (s *Server) init() error {\n\tapi.MountRoutes(s.router)\n\n\tif flagDev {\n\t\tcclog.Print(\"Enable Swagger UI!\")\n\t\ts.router.HandleFunc(\"GET /swagger/\", httpSwagger.Handler(\n\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Address+\"/swagger/doc.json\")))\n\t}\n\n\treturn nil\n}\n\n// Server timeout defaults (in seconds)\nconst (\n\tdefaultReadTimeout = 30\n\tdefaultWriteTimeout = 30\n)\n\nfunc (s *Server) Start(ctx context.Context) error {\n\t// Use configurable timeouts with defaults\n\treadTimeout := time.Duration(defaultReadTimeout) * time.Second\n\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n\n\ts.server = &http.Server{\n\t\tReadTimeout: readTimeout,\n\t\tWriteTimeout: writeTimeout,\n\t\tHandler: s.router,\n\t\tAddr: config.Keys.Address,\n\t}\n\n\t// Start http or https server\n\tlistener, err := net.Listen(\"tcp\", config.Keys.Address)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Address, err)\n\t}\n\n\tif config.Keys.CertFile != \"\" && config.Keys.KeyFile != \"\" {\n\t\tcert, err := tls.LoadX509KeyPair(\n\t\t\tconfig.Keys.CertFile, config.Keys.KeyFile)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n\t\t}\n\t\tlistener = tls.NewListener(listener, &tls.Config{\n\t\t\tCertificates: []tls.Certificate{cert},\n\t\t\tCipherSuites: []uint16{\n\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n\t\t\t},\n\t\t\tMinVersion: tls.VersionTLS12,\n\t\t\tPreferServerCipherSuites: true,\n\t\t})\n\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Address)\n\t} else {\n\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Address)\n\t}\n\n\t// Because this program will want to bind to a privileged port (like 80), the listener must\n\t// be established first, then the user can be changed, and after that,\n\t// the actual http server can be started.\n\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n\t}\n\n\t// Handle context cancellation for graceful shutdown\n\tgo func() {\n\t\t<-ctx.Done()\n\t\tshutdownCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)\n\t\tdefer cancel()\n\t\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t\t}\n\t}()\n\n\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n\t\treturn fmt.Errorf(\"server failed: %w\", err)\n\t}\n\treturn nil\n}\n\nfunc (s *Server) Shutdown(ctx context.Context) {\n\t// Create a shutdown context with timeout\n\tshutdownCtx, cancel := context.WithTimeout(ctx, 30*time.Second)\n\tdefer cancel()\n\n\tnc := nats.GetClient()\n\tif nc != nil {\n\t\tnc.Close()\n\t}\n\n\t// First shut down the server gracefully (waiting for all ongoing requests)\n\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n\t}\n\n\t// Archive all the metric store data\n\tmetricstore.Shutdown()\n}\n","numLines":143,"startLine":1,"totalLines":143}},"sourceToolAssistantUUID":"8eeb9845-6070-43bc-9597-8bd379043f5a","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"7ff95f7e-a8af-4fc4-88fd-285a0b5f6d93","isSidechain":false,"promptId":"a565e195-bf4d-4f03-9e9d-a090ff07f60c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01N4UnaFoMPCTA71ZUHNS1ex","type":"tool_result","content":" 125→func Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n 126→\tstartupTime := time.Now()\n 127→\n 128→\tif rawConfig != nil {\n 129→\t\tconfig.Validate(configSchema, rawConfig)\n 130→\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n 131→\t\tdec.DisallowUnknownFields()\n 132→\t\tif err := dec.Decode(&Keys); err != nil {\n 133→\t\t\tcclog.Abortf(\"[METRICSTORE]> Metric Store Config Init: Could not decode config file '%s'.\\nError: %s\\n\", rawConfig, err.Error())\n 134→\t\t}\n 135→\t}\n 136→\n 137→\t// Set NumWorkers from config or use default\n 138→\tif Keys.NumWorkers <= 0 {\n 139→\t\tKeys.NumWorkers = min(runtime.NumCPU()/2+1, DefaultMaxWorkers)\n 140→\t}\n 141→\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n 142→\n 143→\t// Pass the config.MetricStoreKeys\n 144→\tInitMetrics(metrics)\n 145→\n 146→\tms := GetMemoryStore()\n 147→\n 148→\td, err := time.ParseDuration(Keys.RetentionInMemory)\n 149→\tif err != nil {\n 150→\t\tcclog.Fatal(err)\n 151→\t}\n 152→\n 153→\trestoreFrom := startupTime.Add(-d)\n 154→\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n 155→\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n 156→\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n 157→\tif err != nil {\n 158→\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n 159→\t} else {\n 160→\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n 161→\t}\n 162→\n 163→\t// Try to use less memory by forcing a GC run here and then\n 164→\t// lowering the target percentage. The default of 100 means\n 165→\t// that only once the ratio of new allocations execeds the\n 166→\t// previously active heap, a GC is triggered.\n 167→\t// Forcing a GC here will set the \"previously active heap\"\n 168→\t// to a minumum.\n 169→\t// runtime.GC()\n 170→\n 171→\tctx, shutdown := context.WithCancel(context.Background())\n 172→\n 173→\tRetention(wg, ctx)\n 174→\tCheckpointing(wg, ctx)\n 175→\tCleanUp(wg, ctx)\n 176→\tWALStaging(wg, ctx)\n 177→\tMemoryUsageTracker(wg, ctx)\n 178→\n 179→\t// Note: Signal handling has been removed from this function.\n 180→\t// The caller is responsible for handling shutdown signals and calling\n 181→\t// the shutdown() function when appropriate.\n 182→\t// Store the shutdown function for later use by Shutdown()\n 183→\tshutdownFuncMu.Lock()\n 184→\tshutdownFunc = shutdown\n 185→\tshutdownFuncMu.Unlock()\n 186→\n 187→\tif Keys.Subscriptions != nil {\n 188→\t\twg.Go(func() {\n 189→\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n 190→\t\t\t\tcclog.Fatal(err)\n 191→\t\t\t}\n 192→\t\t})\n 193→\t}\n 194→}\n 195→\n 196→// InitMetrics initializes the singleton MemoryStore instance with the given metric configurations.\n 197→//\n 198→// This function must be called before GetMemoryStore() and can only be called once due to\n 199→// the singleton pattern. It assigns each metric an internal offset for efficient buffer indexing.\n 200→//\n 201→// Parameters:\n 202→// - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n 203→//\n 204→// Panics if any metric has Frequency == 0, which indicates an invalid configuration.\n 205→//\n 206→// After this call, the global msInstance is ready for use via GetMemoryStore().\n 207→func InitMetrics(metrics map[string]MetricConfig) {\n 208→\tsingleton.Do(func() {\n 209→\t\toffset := 0\n 210→\t\tfor key, cfg := range metrics {\n 211→\t\t\tif cfg.Frequency == 0 {\n 212→\t\t\t\tpanic(\"[METRICSTORE]> invalid frequency\")\n 213→\t\t\t}\n 214→\n 215→\t\t\tmetrics[key] = MetricConfig{\n 216→\t\t\t\tFrequency: cfg.Frequency,\n 217→\t\t\t\tAggregation: cfg.Aggregation,\n 218→\t\t\t\toffset: offset,\n 219→\t\t\t}\n 220→\t\t\toffset += 1\n 221→\t\t}\n 222→\n 223→\t\tmsInstance = &MemoryStore{\n 224→\t\t\troot: Level{\n 225→\t\t\t\tmetrics: make([]*buffer, len(metrics)),\n 226→\t\t\t\tchildren: make(map[string]*Level),\n 227→\t\t\t},\n 228→\t\t\tMetrics: metrics,\n 229→\t\t}\n 230→\t})\n 231→}\n 232→\n 233→// GetMemoryStore returns the singleton MemoryStore instance.\n 234→//\n 235→// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n 236→//\n 237→// This function is safe for concurrent use after initialization.\n 238→func GetMemoryStore() *MemoryStore {\n 239→\tif msInstance == nil {\n 240→\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n 241→\t}\n 242→\n 243→\treturn msInstance\n 244→}\n 245→\n 246→func (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n 247→\tif metric, ok := ms.Metrics[metricName]; ok {\n 248→\t\treturn metric.Frequency, nil\n 249→\t}\n 250→\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n 251→}\n 252→\n 253→// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n 254→// This must be called during initialization to provide job state information\n 255→// for selective buffer retention during Free operations.\n 256→// If not set, the Free function will fall back to freeing all buffers.\n 257→func (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n 258→\tms.nodeProvider = provider\n 259→}\n 260→\n 261→// Shutdown performs a graceful shutdown of the metric store.\n 262→//\n 263→// This function cancels all background goroutines started by Init() and writes\n 264→// a final checkpoint to disk before returning. It should be called when the\n 265→// application receives a termination signal.\n 266→//\n 267→// The function will:\n 268→// 1. Cancel the context to stop all background workers\n 269→// 2. Close the WAL messages channel if using WAL format\n 270→// 3. Write a final checkpoint to preserve in-memory data\n 271→// 4. Log any errors encountered during shutdown\n 272→//\n 273→// Note: This function blocks until the final checkpoint is written.\n 274→func Shutdown() {\n 275→\ttotalStart := time.Now()\n 276→\n 277→\tshutdownFuncMu.Lock()\n 278→\tdefer shutdownFuncMu.Unlock()\n 279→\tif shutdownFunc != nil {\n 280→\t\tshutdownFunc()\n 281→\t}\n 282→\tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n 283→\n 284→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n 285→\t\t// Signal producers to stop sending before closing channels,\n 286→\t\t// preventing send-on-closed-channel panics from in-flight NATS workers.\n 287→\t\twalShuttingDown.Store(true)\n 288→\t\t// Brief grace period for in-flight DecodeLine calls to complete.\n 289→\t\ttime.Sleep(100 * time.Millisecond)\n 290→\n 291→\t\tfor _, ch := range walShardChs {\n 292→\t\t\tclose(ch)\n 293→\t\t}\n 294→\t\tdrainStart := time.Now()\n 295→\t\tWaitForWALStagingDrain()\n 296→\t\tcclog.Infof(\"[METRICSTORE]> WAL staging goroutines exited (%v)\", time.Since(drainStart))\n 297→\t}\n 298→\n 299→\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n 300→\tcheckpointStart := time.Now()\n 301→\tvar files int\n 302→\tvar err error\n 303→\n 304→\tms := GetMemoryStore()\n 305→\n 306→\tlastCheckpointMu.Lock()\n 307→\tfrom := lastCheckpoint\n 308→\tlastCheckpointMu.Unlock()\n 309→\n 310→\tif Keys.Checkpoints.FileFormat == \"wal\" {\n 311→\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n 312→\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n 313→\t} else {\n 314→\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n 315→\t}\n 316→\n 317→\tif err != nil {\n 318→\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n 319→\t}\n 320→\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))\n 321→}\n 322→\n 323→// Retention starts a background goroutine that periodically frees old metric data.\n 324→//\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"67c41b0f-6ede-4583-baf9-5309567d9d3c","timestamp":"2026-04-01T13:23:40.194Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go","content":"func Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n\tstartupTime := time.Now()\n\n\tif rawConfig != nil {\n\t\tconfig.Validate(configSchema, rawConfig)\n\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n\t\tdec.DisallowUnknownFields()\n\t\tif err := dec.Decode(&Keys); err != nil {\n\t\t\tcclog.Abortf(\"[METRICSTORE]> Metric Store Config Init: Could not decode config file '%s'.\\nError: %s\\n\", rawConfig, err.Error())\n\t\t}\n\t}\n\n\t// Set NumWorkers from config or use default\n\tif Keys.NumWorkers <= 0 {\n\t\tKeys.NumWorkers = min(runtime.NumCPU()/2+1, DefaultMaxWorkers)\n\t}\n\tcclog.Debugf(\"[METRICSTORE]> Using %d workers for checkpoint/archive operations\\n\", Keys.NumWorkers)\n\n\t// Pass the config.MetricStoreKeys\n\tInitMetrics(metrics)\n\n\tms := GetMemoryStore()\n\n\td, err := time.ParseDuration(Keys.RetentionInMemory)\n\tif err != nil {\n\t\tcclog.Fatal(err)\n\t}\n\n\trestoreFrom := startupTime.Add(-d)\n\tcclog.Infof(\"[METRICSTORE]> Loading checkpoints newer than %s\\n\", restoreFrom.Format(time.RFC3339))\n\tfiles, err := ms.FromCheckpointFiles(Keys.Checkpoints.RootDir, restoreFrom.Unix())\n\tloadedData := ms.SizeInBytes() / 1024 / 1024 // In MB\n\tif err != nil {\n\t\tcclog.Fatalf(\"[METRICSTORE]> Loading checkpoints failed: %s\\n\", err.Error())\n\t} else {\n\t\tcclog.Infof(\"[METRICSTORE]> Checkpoints loaded (%d files, %d MB, that took %fs)\\n\", files, loadedData, time.Since(startupTime).Seconds())\n\t}\n\n\t// Try to use less memory by forcing a GC run here and then\n\t// lowering the target percentage. The default of 100 means\n\t// that only once the ratio of new allocations execeds the\n\t// previously active heap, a GC is triggered.\n\t// Forcing a GC here will set the \"previously active heap\"\n\t// to a minumum.\n\t// runtime.GC()\n\n\tctx, shutdown := context.WithCancel(context.Background())\n\n\tRetention(wg, ctx)\n\tCheckpointing(wg, ctx)\n\tCleanUp(wg, ctx)\n\tWALStaging(wg, ctx)\n\tMemoryUsageTracker(wg, ctx)\n\n\t// Note: Signal handling has been removed from this function.\n\t// The caller is responsible for handling shutdown signals and calling\n\t// the shutdown() function when appropriate.\n\t// Store the shutdown function for later use by Shutdown()\n\tshutdownFuncMu.Lock()\n\tshutdownFunc = shutdown\n\tshutdownFuncMu.Unlock()\n\n\tif Keys.Subscriptions != nil {\n\t\twg.Go(func() {\n\t\t\tif err := ReceiveNats(ms, Keys.NumWorkers, ctx); err != nil {\n\t\t\t\tcclog.Fatal(err)\n\t\t\t}\n\t\t})\n\t}\n}\n\n// InitMetrics initializes the singleton MemoryStore instance with the given metric configurations.\n//\n// This function must be called before GetMemoryStore() and can only be called once due to\n// the singleton pattern. It assigns each metric an internal offset for efficient buffer indexing.\n//\n// Parameters:\n// - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n//\n// Panics if any metric has Frequency == 0, which indicates an invalid configuration.\n//\n// After this call, the global msInstance is ready for use via GetMemoryStore().\nfunc InitMetrics(metrics map[string]MetricConfig) {\n\tsingleton.Do(func() {\n\t\toffset := 0\n\t\tfor key, cfg := range metrics {\n\t\t\tif cfg.Frequency == 0 {\n\t\t\t\tpanic(\"[METRICSTORE]> invalid frequency\")\n\t\t\t}\n\n\t\t\tmetrics[key] = MetricConfig{\n\t\t\t\tFrequency: cfg.Frequency,\n\t\t\t\tAggregation: cfg.Aggregation,\n\t\t\t\toffset: offset,\n\t\t\t}\n\t\t\toffset += 1\n\t\t}\n\n\t\tmsInstance = &MemoryStore{\n\t\t\troot: Level{\n\t\t\t\tmetrics: make([]*buffer, len(metrics)),\n\t\t\t\tchildren: make(map[string]*Level),\n\t\t\t},\n\t\t\tMetrics: metrics,\n\t\t}\n\t})\n}\n\n// GetMemoryStore returns the singleton MemoryStore instance.\n//\n// Returns the initialized MemoryStore singleton. Calls cclog.Fatal if InitMetrics() was not called first.\n//\n// This function is safe for concurrent use after initialization.\nfunc GetMemoryStore() *MemoryStore {\n\tif msInstance == nil {\n\t\tcclog.Warnf(\"[METRICSTORE]> MemoryStore not initialized!\")\n\t}\n\n\treturn msInstance\n}\n\nfunc (ms *MemoryStore) GetMetricFrequency(metricName string) (int64, error) {\n\tif metric, ok := ms.Metrics[metricName]; ok {\n\t\treturn metric.Frequency, nil\n\t}\n\treturn 0, fmt.Errorf(\"[METRICSTORE]> metric %s not found\", metricName)\n}\n\n// SetNodeProvider sets the NodeProvider implementation for the MemoryStore.\n// This must be called during initialization to provide job state information\n// for selective buffer retention during Free operations.\n// If not set, the Free function will fall back to freeing all buffers.\nfunc (ms *MemoryStore) SetNodeProvider(provider NodeProvider) {\n\tms.nodeProvider = provider\n}\n\n// Shutdown performs a graceful shutdown of the metric store.\n//\n// This function cancels all background goroutines started by Init() and writes\n// a final checkpoint to disk before returning. It should be called when the\n// application receives a termination signal.\n//\n// The function will:\n// 1. Cancel the context to stop all background workers\n// 2. Close the WAL messages channel if using WAL format\n// 3. Write a final checkpoint to preserve in-memory data\n// 4. Log any errors encountered during shutdown\n//\n// Note: This function blocks until the final checkpoint is written.\nfunc Shutdown() {\n\ttotalStart := time.Now()\n\n\tshutdownFuncMu.Lock()\n\tdefer shutdownFuncMu.Unlock()\n\tif shutdownFunc != nil {\n\t\tshutdownFunc()\n\t}\n\tcclog.Infof(\"[METRICSTORE]> Background workers cancelled (%v)\", time.Since(totalStart))\n\n\tif Keys.Checkpoints.FileFormat == \"wal\" {\n\t\t// Signal producers to stop sending before closing channels,\n\t\t// preventing send-on-closed-channel panics from in-flight NATS workers.\n\t\twalShuttingDown.Store(true)\n\t\t// Brief grace period for in-flight DecodeLine calls to complete.\n\t\ttime.Sleep(100 * time.Millisecond)\n\n\t\tfor _, ch := range walShardChs {\n\t\t\tclose(ch)\n\t\t}\n\t\tdrainStart := time.Now()\n\t\tWaitForWALStagingDrain()\n\t\tcclog.Infof(\"[METRICSTORE]> WAL staging goroutines exited (%v)\", time.Since(drainStart))\n\t}\n\n\tcclog.Infof(\"[METRICSTORE]> Writing checkpoint to '%s'...\", Keys.Checkpoints.RootDir)\n\tcheckpointStart := time.Now()\n\tvar files int\n\tvar err error\n\n\tms := GetMemoryStore()\n\n\tlastCheckpointMu.Lock()\n\tfrom := lastCheckpoint\n\tlastCheckpointMu.Unlock()\n\n\tif Keys.Checkpoints.FileFormat == \"wal\" {\n\t\t// WAL files are deleted per-host inside ToCheckpointWAL workers.\n\t\tfiles, _, err = ms.ToCheckpointWAL(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n\t} else {\n\t\tfiles, err = ms.ToCheckpoint(Keys.Checkpoints.RootDir, from.Unix(), time.Now().Unix())\n\t}\n\n\tif err != nil {\n\t\tcclog.Errorf(\"[METRICSTORE]> Writing checkpoint failed: %s\", err.Error())\n\t}\n\tcclog.Infof(\"[METRICSTORE]> Done! (%d files written in %v, total shutdown: %v)\", files, time.Since(checkpointStart), time.Since(totalStart))\n}\n\n// Retention starts a background goroutine that periodically frees old metric data.\n//","numLines":200,"startLine":125,"totalLines":815}},"sourceToolAssistantUUID":"7ff95f7e-a8af-4fc4-88fd-285a0b5f6d93","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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TMMivhBxuYCW6IX9KEFBzsIqbzrWm2/vClhy89UH3PfK3UJhbYP+ObeH+evLYjPdkv+7PkxvsUixZIZsJjEt53BpkaPfAWbSvjYDAgXq24JAlvoDwRCwkSNNfrrCgwFBaUNPOqAA5uNCPJJ+1dDNEnFpbHSO9qn/F1+X1CB0AuIucimllPG5U2PLLFvFAjGW8gmkaK+/eq4evh1tOoHROZNQhpsN/jaLs5d6Fau6qoq91+2w5ILI69TzvDU4I1ppz5p6ELaU0hj+5MwhWKqU+6yw1zP8l1wuWBfqwvD6QjEiO9CG1/ldMJdstpFeWmC3m1cjDjgBVjFmiFJnsHQg5m2NgSA2baVGNhGNEJb+nVhgYaTndqQg+qOlwPA1X0/TTk243CfQ83ho32oTUEauQRAczLcnHkqDxEQzzGlySztn+q2U6V7XhoorTDVOuB3XZ+Q+BmVV+LZCc09K9iXgKZL0gG6G95nj4VHm/JqbIPfeQdF5Io4AicbF5hv15+5kdt0ElC3iMWyRr3SQUw0ReVgw46/0LI1SpZkuDtzBVof9EcA5UMTpa9t04dwvJ+SS9oDWB8fbYTWnoqVQsUPNFKKYeRQIQbzM4hHsUhtCj93fefiafoOi7CHYCg1nf+3qzMQUEGJf3fYU6wAhbH5+FehCH9LG07b8EqvkKPDfcJnmaAWk314dEwkzE9Md0tHzh9SISJRDFtnzDMM7NfXtFwGe2fx6FnQXca5SbXcKDx5OG+nZW2V/bKC8ShiHmSpm2l5O32fwaroPuYFLWJ1IRXlI5uZRnA1NgO1K7usld9CtGdqDxGm8d4M585KNpPM2O7jBQZ5pxQf/CPjkJdhDb1Y+7JZDcs622VmHi/2rZccJ3End+D4vr5n++/6RVWwTZ8MH+06GFlEHYqRSRVdrv+0nTuWlvM9cRFQBJSgOXiJ3XosxJ5KKC+6jJks4U5Ujrse8RVeRXR7BTAnucLrfcUF8/wfKEAzFRZ2nwM9e+c+WinkTXUtT9q1YWrB6VuDJ9ISSpZ5tKdZDQoQ/nSibBzIR/lng8TXvSvNzUGjzH2puLH7in3mkUayK1VzEqeDM82hFCAVTENrAALMV0cnuNyOuheoO+ie2ywge2Y4YUnY6up6Qhmp3vPwxPEe8Yy/x88phd7QvdxB9Ypt6immvoAN/cAqhDyzlYXlW+PoAuRr2Q2ISXzTjwhcEWNhO6Oq+OBBpD6TOcy1F2nQuVeEhqkC6LcNYLAOn99i1Ge/XrUbDoVWyEce0cYc33ZamvmUpZ/kN4iFLNIJ6aXkRntkdjKByPkKBrxULIvHSA7+8Rd6mOTiqeRdzDs7TMis6KAAYI+IMDoPP/kb2P1WPGKRz5roN0e6rf0ukne7ob4rT1YMNujPETtNKBQzlQjTipJd0QHIWosfMZk1Mw8ZjnXoLDfDnMq6Uknnf624EhXD+rXX/SIzR5JdNMjXQPDwYjuR4D5NAuLC8CyyZdEB/5H2PMavjU6OHMVOcPKQ9p7PRe5k51UpGQ4Dt4CUTUbDmYoYrcJ8TLyed3oQEaNaNcsB8hJ+fQpIOpvLJOcZ5b/e2ENw3pcVqql3FrVmKhh2iaHi0YBRIu97UhqSNIRbqx+H3cY+ywnizEy9rcfL8Uk8FJ42Hpo5Gbzr/Z0oLzzNRgv/7ayIl1vCGu8bEezrE4par9C/yAMYcRjSDhjpbrNQfknIAApZAMfcezr4icACXoEamDrpSd1QXnkPk112QXd/R+CXA9oR/IQ0d2PS6caUGbFCihtlXnqHVnmpoAQX1MVK6KNfHJirTjhvOCyOIHoGeq5UldCVrfTfNkCjzkb1IGeV/jrlgiz5tKDwdjm3dUD0Q+Tv5Xd/rrKW5M0enppn09gt+DOveesreP0m8ww7gbC0C97hWJXvPQ8239Bck4qyv8Tu0zAt+egovwvABLAmYbh+LTm24E5I6L1VnQmzOm3/BTKGu3yhUZRQWrxU2mVHCiyuALCN0gpXCSLo/iHFCw4RC6fY59Ez1d3o/CqlvXxn/PhmI/xLpjT/XxXiL6CoWra66KJMlol0503K2jTqqnkM/G39JMi8fIdeZ3yxl7uPUxDk2Q/EzIVt7c5BjMjEVwr+Uwuw8QCUGTLIN8+stKaP5rEHGzCvvnPIB1QmafbYW3YaDCgJW2PeHf7t1pz6YgkvJG+0z1hQu7BqHMTq8fysRF9KZfOT+qGIoyGzvUw7aLB9bOAXGxOYYWzcy8gG7Js0ItA5K8p61FXu+q57deqRFLOADAy8C0j+76xxEBGQlG5R8qCasCJ7NwpWf6NfpNY/hHZVSZ3maOYyl2Rv1lsBRJqSK7O2t0hwY15x2xBTUckvE8H28D+VYt1fA/LRfe0jTJVuPZ3f2QYaJYSfcRYlkqLBueSDHPiVYDKgydSWGBTnttmXDUiBI3opthyYjjBcB7h2q5nxqouHAFCErYVlN0PYu7Lak70cLK+OstOWnk3SIz1F5TMnkFCwNtULgDSZSOhieViBfU/RzTK3Cao96CqYDdWO4QRIN78plAG3pfcS6k6X1BeZwJw1xKGSkfijZn7feSDRr5oMoypa7jub51LAfwvyBBRoUgq4Zf5dUJhdHDc1Geqf63r+rztuziqaxzaB2yXKmnbYnpHvJIGFjzKvAKZOVks/BvJkAJo/C8Obr9iTcdz/BsNvTonx/dDFCzLxVMAM2mSgJ8S8oYp4LIHSyDIhVxpCmpmI/VLIN8VWYLGT9itdwJHoDOZYrZrRQ+525Ull/GYK2Yt6/IHzTqBRoBQgy5Wj3xwIxWWyOUMS/MdzCDFEtwjlWBLDrwzHu4/+gInYmvD47ip14i8pYYUiZDUReqEyzFta3qAGBjhRF5r6cRzMIHJljWSHEdbpz1efZpKkH0Kms4g3V4aXFB8Wnwxkt22zLC0rOw0OoutzXfqdRaUa1qJl8IPsI1QoPlw1gn199j5rvRkYpSDUEkZlKL45h0S4oPvNk6C0YfmbGcWnAiDtGxgK+66sHVoTzZyXWitHnMIYUmDnS5QA5cfNQ1eOrgr6jbfhyUakg/eQSRmRFrOccU+OTQ3AkPaFIwW7JWnnYxYSmeAoorsv2OVvshv26N97QgY0hxRx9heeDTlmQRjZws5GZ3U6VZxhIpsxbigsZl2YTwTY3PwGXM+ia3hAI5QEdJhUaYnWOtV3NZ4dD9gVlA6ssj79EWEKvfLJTdJdyJBP071k3pj6ycWKua/flxElLi8VCX4l33bLG3H9gphAx/zZ1vl1ASr0FI5rGgF6T/LobwRrUyCRwQvXC/73/GGoxj2s+6qVJoHmYq3x+ExwTJ6l1wM+MrOKHPdMFv5SIJy+Dsxq+/YjAe+80bYWbLVhIeMUInUtR3DSS2QAdzObmkyzBRF76orsxJejfFhgdRocjxlXYmA0FU1OOiKA2KyVU/TCpLA39IbbYstBZXEIX8VNMfrq2QV26ZWjfJtSrxrLlDhIXlnuVvKgAAZYk0+X/d4cCaL0w0mc1y2vub3GFC8KQMS4ZmaboNWMdBnhUTxNFC313sja/Hqg9SeB8Y4QgO1aJTci9YDAOfmDxkTu6BEQ4n5Hfx0Z35j4qHFVzBPL/q+zWkSi7Cbab50iuAghLl4qKYoWxkdgUWFqBiqr7BuJuXso5ZXuiFdZiMMM4X5GnRUsS8wBKs/U1o82YAEY5HP51WjYUiSuJbZKlTs8Eph2HWh1gVlq7KEX2iUIpC6SDb+IRoCA0F3gIr+9KToyiZWmjqkR7QDSntM1aNZmVlfwkLRkq9UeDFiOoMenczZpYf6rkeKesZWWhFhUQ4z3d0OZufDxfRNuewQTCVXkQFzdvxQOVbiBkT02sT4gsHLVH0pLQmFmYtHAOWayHuo8Rz+SWSnnSYNoK7MsWUEsKzYy46MeeDo0x8GHRIgUEg/1JZaYIzgUD10rFxhMTw5VqxcwxEXQjuHfcOzriQonFYFUtXoAoxG2kA69XhgGnyvWwhWkeRg3vTXyNMl/V4qO+hUd8HLS6VU++n02HnD1k+pDoCyxTTqOHIAVQ+OlSHIWkT4qIYvSq5d30WGlQoOTW5Bvsh5jlSHUnymZbDWsa6pqvf0pY6GZvUeKYbEsTbVN2kNY4Emx5kY9a8VJFv1MpJ63zuYcfN3zT9g+/jtVklAXAzWTobw+PYQQ+a86y1AJIP/WJGMDPrgliGn/P02Fx8aaNb70ciYvKuhewNfAXj4wDGPTw/orGrLHTh1VlwQq1FCjNtt30Ho4hccEibhs5gPMSiI0EDW8OrzHmfdcEfq4q2vty6Tp1MwIY/YBzwg/dsPg388Ub3ny2Xsh3BmBKvobnHitOPEMyy5jIF39ZAWjoUC1XVNJLR4DEWxMK3mpQ+QecZt+yxDj8+nSIaSObP/iRhdOt2TZNVxgRc7aRCh+cuIIgihuMwQpmKJos6GdQpbROqLSWXA5zTM0WWyvch+Q84F7sIGlxP3FLs5NBaoVDWBjFLgmomJdKW/Tbyi+0kK3lbQCwzcASspCyvodVCGEc69g98r+ccJB2Mc3JAInqLbCbIm+OhTZopaTD0AaZmsbSl3t0buIaCj+9E9H4wLi5PT3h1Pcg4Xoh+Zzzc/hLgLRYHWdN6dTiM2fKdKFmFVtCR1C8Tm4cklRFRBHBSICnY1ie7JDuI0TvSZMnJ00R7lfWaKZbfrmcBM8ED9+oxvSppCf9X6x9wYWBT7fV6vVnV0+SvsD+9pa0bE9AYcbdrFNquk4VSMUdL19pK2zC1UDsOBxskJ0YDRPSWAr/4d8w/XRPXfTHXPAvF+PDxRawZdJU3ZwdJg1pbJQd/xxRkDU06jYuvDWTkkfVqxzjJs1CRuShjRhZ/0ZFd3CjFNzGCo05RBPVYIAjkmXGL/qwXnZECXwi6Mr1oLuiLKVoCy5IuYbl50U6EG/Sn9KcQ1v2TeoVtE/9y+hhRBZsgYhJEKkYO+sg695/B9G+zsPoyvhnMB1aaBdaV693fUDv9P37hgXavGw4AeVPwitygstlvCsOD/nQkXmp6qsEsFPKE0GWulEEC+qYitT6jVsiUAXickAFnNDKJoRs6qRFe6aUg3Wh2W9h8ZUmSIvMnJUsJZ9zU8+D0PxtvgoDsBaEsDRQaT+OH4DhbiFqlHzpl18ZY6yl6bGuboAIYOU0D3ol+SifX3OsZZvDNUqDbzarZdenHtSpmd3Xo5+4XdNaC+RFlbXDqIdhbdLgMk0xPV3MyUg+vLSKOtD5VrZ4/ttoqz9rCrCle/mcEgV9fTt+7GYsQl1wbr863mwjxDh/KB3R7VWFyP+kGXF21S9tTilX3vL8udxpcHxFa0kqheFZY0IDNcQX5pO875RsRdAly8KC3AWreC7bGW0nZ313ob53o3NqJxyGGkXyFu+0a0NTfI/Ms8xX4VI8ml/2dUdHULJYNXcjU0r6+Uo9j9eiBieu0IwfaR7LzPrg8+5YB1RY9MoLIKGl2Gw39ybWXk9qCFX75LquoXr3i9coLsNCIuIq7IvQkBPSwIL+PIeTq4rJRRyoxtQOz0BRyGWoUO0pr7maNvTaOb81BfdHO1ohrcAK+eKCFhfFhqB7NQxfnkQObdmNTC/o+/b2mC1x14CqaNUM94wY4KO987Bb1mqK3JpPYoBiCvB96GW8jYJOlESxdIFnO3yD6hagwBLb4fwQGTcvKjXeuBFBVmY/5dvs7C+LgxssBo269IonoJPFubRntYS5qRE5P+nNlB8MKYDN8DFlJ5TqlH5A358EFNruXlE7pMabQyQD7VBmT5aTJfQSWsVZwiCnQ2RYtbgT8A9lWqkOPIRqUTFqx8xz+/4yFy4kcoVbRCm9AMj8aRciS4ILfdbw6xxH08HFBsuAEziEldciD8KzwNyDk9s/nyMycihlh6ugtOD4TPHp0BNocT7xl5XmC1DQBQNR5yI1PCqH9x+t67aVmzrPURStwzG3iJBsYoyCPNfh/N3Nz7EvesBgPSBRFDTU8XtsQggP8H07RqEw9Z9pCH/sGJ/yStoUB+D5FJAWDkm4v3f+UUcxrMHQ2URseiQsBLgNL78w67G7PzVdDkBJpNiqxfWMAMLVPxrVtcmTyiWimmucb/cJrSMoGQZ9/3hmNIRXxBoIVnrOqCsGWGin4f3eME5vUgD24uf7ZjEHvyhgSygz7bEOfhHpbAPt4zqs03P6C/Qam0ZgZg66+CkLLGR/ipx5P95hU52hg4K9d0XXnYlQ+MrWgGa2WB3FwR4TzMim+E9OPWgXECn+gwMotuW5fZFpAlyjVq0/3m6ZmWj8CLOww+Z+6hIpMhQDOpAWXn2QE8amLCo7JFv2VLHXxeE5kjpsewY+4HI2zgNft0QwCBjTzm4vhGhkftOlrfKUj93jrTyNYbbWz094XHAPGQ7gJ4tmgeqpLGxHyny1cjwG/n0NochOx94vrxYr0DBSPDM00Lfmlgy9BQN8nUNlTbahFLrGRc3wdBq7OdL7tJD31xzIFkV9FjAtr5Sec+kAsMML1lwMfhpwMZKlHy+LkOOXSycIpX2Vie69LuqHO2GyagIiISNKIwMy0K7o+Sr7Y9tGfWduGWuTz87O8v4y9mPCGjC/U/sbNjqB/eOYusWF1Otjysl4KvllcibK//rUeSRambpEleicoIhNvvQOyDn49g96e8+H7KbB26Yl4jAaoWJ3Ps+yBCr4Pet7xeFKvV5gSVV6WijuTkA7RWZ1+Upmeypo7SwGhG3gymkY9WtKRO65I8diKtx8Ml0MyKfYGepYm9C56KvvygIR7xQKrbmFo8xkbmhSFQ98JdIo/dGyvoVKbC+/ilzCEwIXdNrdlmwboazvjE+XPN76Z7nB2RMmZn0wfFOmfcVt8aUHLgh5sarMmfVMovQHpHnoqINHrZ+ROGdf8x2ZmeY9BabUI2ICZWiq6Egq/GE5xwcfpGxCiKSRglDChK/+CAHm90GCjTNMLcpxna9X1aEvm9mOD6Fsq/560K1c5qY8/1Sz/kvvnAV9kac2WaEjN5c1BzwmzOsUHQNEMQ9xdroJFTBMwDeWv/rXPIYkOtYHUnZ3qPysPHk9o61Joj7tcDsbhP6QI0XkPYtlHlrSBJSBwXkIDKdqWnCBeI5UOWkZQbzaam/nHG/QrOtRZ36x5s9k5q48IZT1dWVUAeMXYAhMYAQ=="}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":5151,"cache_read_input_tokens":58351,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":5151},"output_tokens":23,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8962bJKkLV2UAi9dM6","type":"assistant","uuid":"e43f419f-f357-425c-a620-18f8e933d4dc","timestamp":"2026-04-01T13:24:31.058Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"e43f419f-f357-425c-a620-18f8e933d4dc","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01JsfuqddxY5HuQf5uWRiFUg","type":"message","role":"assistant","content":[{"type":"text","text":"Now I have a complete picture. Let me update the plan."}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":5151,"cache_read_input_tokens":58351,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":5151},"output_tokens":23,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8962bJKkLV2UAi9dM6","type":"assistant","uuid":"f364f4a8-210e-4ed7-a39e-bcbe582fbbb1","timestamp":"2026-04-01T13:24:31.544Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"f364f4a8-210e-4ed7-a39e-bcbe582fbbb1","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01JsfuqddxY5HuQf5uWRiFUg","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01V4hHpAgwHaz3fnjScLjNfM","name":"Write","input":{"file_path":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md","content":"# Plan: Fix startup/shutdown sequence vs metricstore\n\n## Context\n\nAfter comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s\n`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.\nThe shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown()).\n\n## Bugs found\n\n### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)\n\n**Code (lines 141-145):**\n```go\nif flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded\n agent.Listen(...)\n}\n\nccconf.Init(flagConfigFile) // line 147\nconfig.Init(cfg) // line 154 — only here is config.Keys populated\n```\n\n`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because\n`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in\n`config.json` silently has no effect.\n\n**Fix:** Move the gops block to after `config.Init(cfg)`.\n\n### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)\n\n**Code (lines 63-68):**\n```go\nmetricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers\n\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\nThe GC target is set to 15% *after* checkpoint loading, which is the largest allocation\nevent at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call\n(line 169) that was intended to establish a good GC baseline after loading — that only\nworks well if the GC percent is already low at that point.\n\n**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`.\n\n## Shutdown sequence — confirmed correct\n\nThe order in `server.go Shutdown()` is:\n1. Close NATS client → stops new inbound metric data\n2. `s.server.Shutdown()` → drains in-flight HTTP requests\n3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint\n\nThis matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)\n - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`\n\n## Verification\n\n```bash\ngo build ./...\ngo test -v ./...\n```\n\nManually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts.\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":5151,"cache_read_input_tokens":58351,"output_tokens":3465,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":5151,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8962bJKkLV2UAi9dM6","type":"assistant","uuid":"7b2f07bb-9501-4f3e-bb6e-f419870caaca","timestamp":"2026-04-01T13:24:46.477Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"7b2f07bb-9501-4f3e-bb6e-f419870caaca","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Write","command":"callback"},"parentToolUseID":"toolu_01V4hHpAgwHaz3fnjScLjNfM","toolUseID":"toolu_01V4hHpAgwHaz3fnjScLjNfM","timestamp":"2026-04-01T13:24:46.493Z","uuid":"ac178331-a4dd-4e91-9fff-431f3bc0ac40","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"7b2f07bb-9501-4f3e-bb6e-f419870caaca","isSidechain":false,"promptId":"a565e195-bf4d-4f03-9e9d-a090ff07f60c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01V4hHpAgwHaz3fnjScLjNfM","type":"tool_result","content":"The file /Users/jan/.claude/plans/stateful-frolicking-jellyfish.md has been updated successfully."}]},"uuid":"3a450b68-8929-4c6c-9c05-983f3c327b34","timestamp":"2026-04-01T13:24:46.493Z","toolUseResult":{"type":"update","filePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md","content":"# Plan: Fix startup/shutdown sequence vs metricstore\n\n## Context\n\nAfter comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s\n`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.\nThe shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown()).\n\n## Bugs found\n\n### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)\n\n**Code (lines 141-145):**\n```go\nif flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded\n agent.Listen(...)\n}\n\nccconf.Init(flagConfigFile) // line 147\nconfig.Init(cfg) // line 154 — only here is config.Keys populated\n```\n\n`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because\n`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in\n`config.json` silently has no effect.\n\n**Fix:** Move the gops block to after `config.Init(cfg)`.\n\n### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)\n\n**Code (lines 63-68):**\n```go\nmetricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers\n\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\nThe GC target is set to 15% *after* checkpoint loading, which is the largest allocation\nevent at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call\n(line 169) that was intended to establish a good GC baseline after loading — that only\nworks well if the GC percent is already low at that point.\n\n**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`.\n\n## Shutdown sequence — confirmed correct\n\nThe order in `server.go Shutdown()` is:\n1. Close NATS client → stops new inbound metric data\n2. `s.server.Shutdown()` → drains in-flight HTTP requests\n3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint\n\nThis matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)\n - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`\n\n## Verification\n\n```bash\ngo build ./...\ngo test -v ./...\n```\n\nManually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts.\n","structuredPatch":[{"oldStart":1,"oldLines":73,"newStart":1,"newLines":69,"lines":["-# Plan: Sync metric-store config and docs with cc-backend","+# Plan: Fix startup/shutdown sequence vs metricstore"," "," ## Context"," ","-The `MetricStoreConfig` struct in `cc-backend/pkg/metricstore/config.go` has evolved. The","-cc-metric-store's config template and documentation are out of sync. Specifically:","+After comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s","+`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.","+The shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown())."," ","-1. `checkpoints.interval` was moved to a top-level `checkpoint-interval` field","-2. `cleanup.interval` was removed (now derived from `retention-in-memory`)","-3. A new `checkpoints.file-format` field (`\"json\"` or `\"wal\"`) was added; `\"wal\"` is now the default","-4. New optional fields: `num-workers`, `checkpoints.max-wal-size`","-5. README incorrectly says `memory-cap` is in MB (it's GB)","-6. README incorrectly labels `\"json\"` as the default checkpoint format (it's `\"wal\"`)","+## Bugs found"," ","-## Files to change","+### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)"," ","-### 1. `configs/config.json`","-","-Current broken `metric-store` section:","-```json","-\"metric-store\": {","- \"checkpoints\": {","- \"interval\": \"12h\", ← INVALID field (moved to top-level)","- \"directory\": \"./var/checkpoints\"","- },","- \"memory-cap\": 100,","- \"retention-in-memory\": \"48h\",","- \"cleanup\": {","- \"mode\": \"archive\",","- \"interval\": \"48h\", ← INVALID field (derived from retention-in-memory)","- \"directory\": \"./var/archive\"","- },","- \"nats-subscriptions\": [...]","+**Code (lines 141-145):**","+```go","+if flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded","+ agent.Listen(...)"," }","+","+ccconf.Init(flagConfigFile) // line 147","+config.Init(cfg) // line 154 — only here is config.Keys populated"," ```"," ","-Fix:","-- Remove `checkpoints.interval`","-- Remove `cleanup.interval`","-- Add `checkpoints.file-format: \"wal\"`","-- Add top-level `checkpoint-interval: \"12h\"`","+`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because","+`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in","+`config.json` silently has no effect."," ","-### 2. `README.md`","+**Fix:** Move the gops block to after `config.Init(cfg)`."," ","-Two description bugs (the example JSON block is already correct):","+### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)"," ","-- Line ~180: `memory-cap` description says \"MB\" → fix to \"GB\"","-- Line ~177: `checkpoints.file-format` says `\"json\"` (default) → fix to `\"wal\"` (default)","-- \"Checkpoint formats\" section: `**\\`\"json\"\\` (default)**` header → remove `(default)`, and `**\\`\"wal\"\\`**` → add `(default)` to WAL header","+**Code (lines 63-68):**","+```go","+metricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers"," ","-### 3. `CLAUDE.md`","+if os.Getenv(envGOGC) == \"\" {","+ debug.SetGCPercent(15)","+}","+```"," ","-Update `metric-store` config description to reflect:","-- `checkpoint-interval` as top-level field (no longer inside `checkpoints`)","-- WAL format as the default","-- Removal of `cleanup.interval` (derived)","-- New fields: `num-workers`, `checkpoints.file-format`, `checkpoints.max-wal-size`","+The GC target is set to 15% *after* checkpoint loading, which is the largest allocation","+event at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call","+(line 169) that was intended to establish a good GC baseline after loading — that only","+works well if the GC percent is already low at that point."," ","-## Critical files","+**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`."," ","-- `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`","-- `/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md`","-- `/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md`","+## Shutdown sequence — confirmed correct"," ","-Reference (read-only):","-- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` — authoritative struct","-- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go` — authoritative JSON schema","+The order in `server.go Shutdown()` is:","+1. Close NATS client → stops new inbound metric data","+2. `s.server.Shutdown()` → drains in-flight HTTP requests","+3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint"," ","+This matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).","+","+## Files to change","+","+- `cmd/cc-metric-store/main.go`","+ - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)","+ - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`","+"," ## Verification"," ","-- `go build ./...` in cc-metric-store (config is only read at runtime, but build confirms no breakage)","-- Manually inspect that `configs/config.json` passes the schema from `configSchema.go` (no unknown fields)","-- Review README render for correctness","+```bash","+go build ./...","+go test -v ./...","+```","+","+Manually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts."]}],"originalFile":"# Plan: Sync metric-store config and docs with cc-backend\n\n## Context\n\nThe `MetricStoreConfig` struct in `cc-backend/pkg/metricstore/config.go` has evolved. The\ncc-metric-store's config template and documentation are out of sync. Specifically:\n\n1. `checkpoints.interval` was moved to a top-level `checkpoint-interval` field\n2. `cleanup.interval` was removed (now derived from `retention-in-memory`)\n3. A new `checkpoints.file-format` field (`\"json\"` or `\"wal\"`) was added; `\"wal\"` is now the default\n4. New optional fields: `num-workers`, `checkpoints.max-wal-size`\n5. README incorrectly says `memory-cap` is in MB (it's GB)\n6. README incorrectly labels `\"json\"` as the default checkpoint format (it's `\"wal\"`)\n\n## Files to change\n\n### 1. `configs/config.json`\n\nCurrent broken `metric-store` section:\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"interval\": \"12h\", ← INVALID field (moved to top-level)\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"48h\",\n \"cleanup\": {\n \"mode\": \"archive\",\n \"interval\": \"48h\", ← INVALID field (derived from retention-in-memory)\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [...]\n}\n```\n\nFix:\n- Remove `checkpoints.interval`\n- Remove `cleanup.interval`\n- Add `checkpoints.file-format: \"wal\"`\n- Add top-level `checkpoint-interval: \"12h\"`\n\n### 2. `README.md`\n\nTwo description bugs (the example JSON block is already correct):\n\n- Line ~180: `memory-cap` description says \"MB\" → fix to \"GB\"\n- Line ~177: `checkpoints.file-format` says `\"json\"` (default) → fix to `\"wal\"` (default)\n- \"Checkpoint formats\" section: `**\\`\"json\"\\` (default)**` header → remove `(default)`, and `**\\`\"wal\"\\`**` → add `(default)` to WAL header\n\n### 3. `CLAUDE.md`\n\nUpdate `metric-store` config description to reflect:\n- `checkpoint-interval` as top-level field (no longer inside `checkpoints`)\n- WAL format as the default\n- Removal of `cleanup.interval` (derived)\n- New fields: `num-workers`, `checkpoints.file-format`, `checkpoints.max-wal-size`\n\n## Critical files\n\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/configs/config.json`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md`\n- `/Users/jan/prg/ClusterCockpit/cc-metric-store/CLAUDE.md`\n\nReference (read-only):\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/config.go` — authoritative struct\n- `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/configSchema.go` — authoritative JSON schema\n\n## Verification\n\n- `go build ./...` in cc-metric-store (config is only read at runtime, but build confirms no breakage)\n- Manually inspect that `configs/config.json` passes the schema from `configSchema.go` (no unknown fields)\n- Review README render for correctness\n"},"sourceToolAssistantUUID":"7b2f07bb-9501-4f3e-bb6e-f419870caaca","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"3a450b68-8929-4c6c-9c05-983f3c327b34","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01PyWeQAPdPxuhnr9mFdh2pZ","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01KYtwDVExCf3w68wqYSevxN","name":"ExitPlanMode","input":{"plan":"# Plan: Fix startup/shutdown sequence vs metricstore\n\n## Context\n\nAfter comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s\n`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.\nThe shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown()).\n\n## Bugs found\n\n### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)\n\n**Code (lines 141-145):**\n```go\nif flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded\n agent.Listen(...)\n}\n\nccconf.Init(flagConfigFile) // line 147\nconfig.Init(cfg) // line 154 — only here is config.Keys populated\n```\n\n`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because\n`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in\n`config.json` silently has no effect.\n\n**Fix:** Move the gops block to after `config.Init(cfg)`.\n\n### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)\n\n**Code (lines 63-68):**\n```go\nmetricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers\n\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\nThe GC target is set to 15% *after* checkpoint loading, which is the largest allocation\nevent at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call\n(line 169) that was intended to establish a good GC baseline after loading — that only\nworks well if the GC percent is already low at that point.\n\n**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`.\n\n## Shutdown sequence — confirmed correct\n\nThe order in `server.go Shutdown()` is:\n1. Close NATS client → stops new inbound metric data\n2. `s.server.Shutdown()` → drains in-flight HTTP requests\n3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint\n\nThis matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)\n - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`\n\n## Verification\n\n```bash\ngo build ./...\ngo test -v ./...\n```\n\nManually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts.\n","planFilePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":3600,"cache_read_input_tokens":63502,"output_tokens":38,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":3600,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8DyQ7s54A8Z2Zz5cca","type":"assistant","uuid":"fbc81678-cde6-4b6b-bab9-d49af59e254e","timestamp":"2026-04-01T13:24:48.653Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"fbc81678-cde6-4b6b-bab9-d49af59e254e","isSidechain":false,"promptId":"a565e195-bf4d-4f03-9e9d-a090ff07f60c","type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"User has approved your plan. You can now start coding. Start with updating your todo list if applicable\n\nYour plan has been saved to: /Users/jan/.claude/plans/stateful-frolicking-jellyfish.md\nYou can refer back to it if needed during implementation.\n\n## Approved Plan:\n# Plan: Fix startup/shutdown sequence vs metricstore\n\n## Context\n\nAfter comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s\n`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.\nThe shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown()).\n\n## Bugs found\n\n### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)\n\n**Code (lines 141-145):**\n```go\nif flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded\n agent.Listen(...)\n}\n\nccconf.Init(flagConfigFile) // line 147\nconfig.Init(cfg) // line 154 — only here is config.Keys populated\n```\n\n`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because\n`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in\n`config.json` silently has no effect.\n\n**Fix:** Move the gops block to after `config.Init(cfg)`.\n\n### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)\n\n**Code (lines 63-68):**\n```go\nmetricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers\n\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\nThe GC target is set to 15% *after* checkpoint loading, which is the largest allocation\nevent at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call\n(line 169) that was intended to establish a good GC baseline after loading — that only\nworks well if the GC percent is already low at that point.\n\n**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`.\n\n## Shutdown sequence — confirmed correct\n\nThe order in `server.go Shutdown()` is:\n1. Close NATS client → stops new inbound metric data\n2. `s.server.Shutdown()` → drains in-flight HTTP requests\n3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint\n\nThis matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)\n - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`\n\n## Verification\n\n```bash\ngo build ./...\ngo test -v ./...\n```\n\nManually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts.\n","tool_use_id":"toolu_01KYtwDVExCf3w68wqYSevxN"}]},"uuid":"d49cce9a-08a1-46a0-91ec-74b6cc409b79","timestamp":"2026-04-01T13:25:57.198Z","toolUseResult":{"plan":"# Plan: Fix startup/shutdown sequence vs metricstore\n\n## Context\n\nAfter comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s\n`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.\nThe shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown()).\n\n## Bugs found\n\n### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)\n\n**Code (lines 141-145):**\n```go\nif flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded\n agent.Listen(...)\n}\n\nccconf.Init(flagConfigFile) // line 147\nconfig.Init(cfg) // line 154 — only here is config.Keys populated\n```\n\n`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because\n`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in\n`config.json` silently has no effect.\n\n**Fix:** Move the gops block to after `config.Init(cfg)`.\n\n### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)\n\n**Code (lines 63-68):**\n```go\nmetricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers\n\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\nThe GC target is set to 15% *after* checkpoint loading, which is the largest allocation\nevent at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call\n(line 169) that was intended to establish a good GC baseline after loading — that only\nworks well if the GC percent is already low at that point.\n\n**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`.\n\n## Shutdown sequence — confirmed correct\n\nThe order in `server.go Shutdown()` is:\n1. Close NATS client → stops new inbound metric data\n2. `s.server.Shutdown()` → drains in-flight HTTP requests\n3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint\n\nThis matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)\n - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`\n\n## Verification\n\n```bash\ngo build ./...\ngo test -v ./...\n```\n\nManually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts.\n","isAgent":false,"filePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md"},"sourceToolAssistantUUID":"fbc81678-cde6-4b6b-bab9-d49af59e254e","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\t// Set GC percent if not configured\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","structuredPatch":[{"oldStart":138,"oldLines":12,"newStart":138,"newLines":6,"lines":[" "," cclog.Init(flagLogLevel, flagLogDateTime)"," ","- if flagGops || config.Keys.Debug.EnableGops {","- if err := agent.Listen(agent.Options{}); err != nil {","- return fmt.Errorf(\"starting gops agent: %w\", err)","- }","- }","-"," ccconf.Init(flagConfigFile)"," "," cfg := ccconf.GetPackageConfig(\"main\")"]},{"oldStart":153,"oldLines":6,"newStart":147,"newLines":12,"lines":[" "," config.Init(cfg)"," ","+ if flagGops || config.Keys.Debug.EnableGops {","+ if err := agent.Listen(agent.Options{}); err != nil {","+ return fmt.Errorf(\"starting gops agent: %w\", err)","+ }","+ }","+"," natsConfig := ccconf.GetPackageConfig(\"nats\")"," if err := nats.Init(natsConfig); err != nil {"," cclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"bdc3560a-3721-437c-8c57-5a7fbd5e4ac5","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\t// Set GC percent if not configured\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","structuredPatch":[{"oldStart":60,"oldLines":13,"newStart":60,"newLines":14,"lines":[" return fmt.Errorf(\"missing metricstore configuration\")"," }"," ","- metricstore.Init(mscfg, config.GetMetrics(), &wg)","-","- // Set GC percent if not configured","+ // Set GC percent before loading checkpoints so the GC baseline is established","+ // with a low target from the start of the largest allocation event."," if os.Getenv(envGOGC) == \"\" {"," debug.SetGCPercent(15)"," }"," ","+ metricstore.Init(mscfg, config.GetMetrics(), &wg)","+"," if config.Keys.BackendURL != \"\" {"," ms := metricstore.GetMemoryStore()"," ms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"c188bd11-bbf1-49c9-b147-b91562e9ceb3","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"1092ab2e-42f0-4c49-b9a6-a6a6aaad07b6","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01Cj6kGQp1QemghU2cjQku4m","type":"message","role":"assistant","content":[{"type":"text","text":"Clean. Here's what was changed:\n\n**Bug 1 — gops never activated from config file**: Moved the gops initialization block to *after* `config.Init(cfg)`. Previously `config.Keys.Debug.EnableGops` was always `false` (zero value) because it was checked before the config file was parsed. The `-gops` CLI flag worked, but `\"debug\": {\"gops\": true}` in `config.json` silently had no effect.\n\n**Bug 2 — GOGC set after checkpoint loading**: Moved `debug.SetGCPercent(15)` to *before* `metricstore.Init()`. The GC target is now 15% during the checkpoint load (the largest allocation event at startup), which is exactly when it matters most for memory control.\n\n**Shutdown sequence** — confirmed correct as-is: NATS close → HTTP drain → `metricstore.Shutdown()` (WAL drain + final checkpoint). No changes needed there."}],"stop_reason":"end_turn","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":108,"cache_read_input_tokens":69002,"output_tokens":226,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":108,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8Lb5PWEjq1sAZMsoSy","type":"assistant","uuid":"3db0bba9-b257-40da-9fd1-f62ccfccf055","timestamp":"2026-04-01T13:26:24.196Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"7f1b5877-9e62-43cc-8162-86272c780673","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01EUPUNPXSaNbPa6jWKh8B5z","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-metric-store.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→package main\n 7→\n 8→import (\n 9→\t\"context\"\n 10→\t\"flag\"\n 11→\t\"fmt\"\n 12→\t\"os\"\n 13→\t\"os/signal\"\n 14→\t\"runtime/debug\"\n 15→\t\"sync\"\n 16→\t\"syscall\"\n 17→\n 18→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 19→\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n 20→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 21→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 22→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 23→\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n 24→\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n 25→\t\"github.com/google/gops/agent\"\n 26→)\n 27→\n 28→const (\n 29→\tenvGOGC = \"GOGC\"\n 30→)\n 31→\n 32→var (\n 33→\tdate string\n 34→\tcommit string\n 35→\tversion string\n 36→)\n 37→\n 38→var (\n 39→\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n 40→\tflagConfigFile, flagLogLevel string\n 41→)\n 42→\n 43→func printVersion() {\n 44→\tfmt.Printf(\"Version:\\t%s\\n\", version)\n 45→\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n 46→\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n 47→}\n 48→\n 49→func runServer(ctx context.Context) error {\n 50→\tvar wg sync.WaitGroup\n 51→\n 52→\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n 53→\tif mscfg == nil {\n 54→\t\treturn fmt.Errorf(\"missing metrics configuration\")\n 55→\t}\n 56→\tconfig.InitMetrics(mscfg)\n 57→\n 58→\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n 59→\tif mscfg == nil {\n 60→\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n 61→\t}\n 62→\n 63→\t// Set GC percent before loading checkpoints so the GC baseline is established\n 64→\t// with a low target from the start of the largest allocation event.\n 65→\tif os.Getenv(envGOGC) == \"\" {\n 66→\t\tdebug.SetGCPercent(15)\n 67→\t}\n 68→\n 69→\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n 70→\n 71→\tif config.Keys.BackendURL != \"\" {\n 72→\t\tms := metricstore.GetMemoryStore()\n 73→\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n 74→\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n 75→\t}\n 76→\n 77→\t// Initialize HTTP server\n 78→\tsrv, err := NewServer(version, commit, date)\n 79→\tif err != nil {\n 80→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n 81→\t}\n 82→\n 83→\t// Channel to collect errors from server\n 84→\terrChan := make(chan error, 1)\n 85→\n 86→\t// Start HTTP server\n 87→\twg.Go(func() {\n 88→\t\tif err := srv.Start(ctx); err != nil {\n 89→\t\t\terrChan <- err\n 90→\t\t}\n 91→\t})\n 92→\n 93→\t// Handle shutdown signals\n 94→\twg.Add(1)\n 95→\tsigs := make(chan os.Signal, 1)\n 96→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n 97→\tgo func() {\n 98→\t\tdefer wg.Done()\n 99→\t\tselect {\n 100→\t\tcase <-sigs:\n 101→\t\t\tcclog.Info(\"Shutdown signal received\")\n 102→\t\tcase <-ctx.Done():\n 103→\t\t}\n 104→\n 105→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n 106→\t\tsrv.Shutdown(ctx)\n 107→\t}()\n 108→\n 109→\truntime.SystemdNotify(true, \"running\")\n 110→\n 111→\t// Wait for completion or errors\n 112→\tgo func() {\n 113→\t\twg.Wait()\n 114→\t\tclose(errChan)\n 115→\t}()\n 116→\n 117→\t// Wait for either server startup error or shutdown completion\n 118→\tif err := <-errChan; err != nil {\n 119→\t\treturn err\n 120→\t}\n 121→\n 122→\tcclog.Print(\"Graceful shutdown completed!\")\n 123→\treturn nil\n 124→}\n 125→\n 126→func run() error {\n 127→\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n 128→\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n 129→\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n 130→\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n 131→\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n 132→\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n 133→\tflag.Parse()\n 134→\n 135→\tif flagVersion {\n 136→\t\tprintVersion()\n 137→\t\treturn nil\n 138→\t}\n 139→\n 140→\tcclog.Init(flagLogLevel, flagLogDateTime)\n 141→\n 142→\tccconf.Init(flagConfigFile)\n 143→\n 144→\tcfg := ccconf.GetPackageConfig(\"main\")\n 145→\tif cfg == nil {\n 146→\t\treturn fmt.Errorf(\"main configuration must be present\")\n 147→\t}\n 148→\n 149→\tconfig.Init(cfg)\n 150→\n 151→\tif flagGops || config.Keys.Debug.EnableGops {\n 152→\t\tif err := agent.Listen(agent.Options{}); err != nil {\n 153→\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n 154→\t\t}\n 155→\t}\n 156→\n 157→\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n 158→\tif err := nats.Init(natsConfig); err != nil {\n 159→\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n 160→\t}\n 161→\tnats.Connect()\n 162→\n 163→\tctx, cancel := context.WithCancel(context.Background())\n 164→\tdefer cancel()\n 165→\n 166→\treturn runServer(ctx)\n 167→}\n 168→\n 169→func main() {\n 170→\tif err := run(); err != nil {\n 171→\t\tcclog.Error(err.Error())\n 172→\t\tos.Exit(1)\n 173→\t}\n 174→}\n 175→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"f9e59e4d-5452-4072-a049-d38d496184b7","timestamp":"2026-04-01T13:28:06.740Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\t// Set GC percent before loading checkpoints so the GC baseline is established\n\t// with a low target from the start of the largest allocation event.\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","numLines":175,"startLine":1,"totalLines":175}},"sourceToolAssistantUUID":"7f1b5877-9e62-43cc-8162-86272c780673","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"88685b6a-de92-4835-81b5-93b0d1dbb905","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:30:40.909Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01GsrLXYEbD4U4U3FonCk7tu","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01YUAZYzN7abHFktSmnfWWaV","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/cli.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":5,"cache_creation_input_tokens":509,"cache_read_input_tokens":15376,"cache_creation":{"ephemeral_5m_input_tokens":509,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd8fySpdARoFWHKJzUvH","uuid":"57ef764d-f6f2-4a1a-b311-a036e4814d55"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"a4c8a3f0-db73-460a-8eb8-a5e82e1e55d6","timestamp":"2026-04-01T13:30:40.909Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"a4c8a3f0-db73-460a-8eb8-a5e82e1e55d6","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01YUAZYzN7abHFktSmnfWWaV","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package main provides the entry point for the ClusterCockpit backend server.\n 7→// This file defines all command-line flags and their default values.\n 8→package main\n 9→\n 10→import \"flag\"\n 11→\n 12→var (\n 13→\tflagReinitDB, flagInit, flagServer, flagSyncLDAP, flagGops, flagMigrateDB, flagRevertDB,\n 14→\tflagForceDB, flagDev, flagVersion, flagLogDateTime, flagApplyTags, flagOptimizeDB,\n 15→\tflagCleanupCheckpoints bool\n 16→\tflagNewUser, flagDelUser, flagGenJWT, flagConfigFile, flagImportJob, flagLogLevel string\n 17→)\n 18→\n 19→func cliInit() {\n 20→\tflag.BoolVar(&flagInit, \"init\", false, \"Setup var directory, initialize sqlite database file, config.json and .env\")\n 21→\tflag.BoolVar(&flagReinitDB, \"init-db\", false, \"Go through job-archive and re-initialize the 'job', 'tag', and 'jobtag' tables (all running jobs will be lost!)\")\n 22→\tflag.BoolVar(&flagSyncLDAP, \"sync-ldap\", false, \"Sync the 'hpc_user' table with ldap\")\n 23→\tflag.BoolVar(&flagServer, \"server\", false, \"Start a server, continues listening on port after initialization and argument handling\")\n 24→\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n 25→\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development components: GraphQL Playground and Swagger UI\")\n 26→\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n 27→\tflag.BoolVar(&flagMigrateDB, \"migrate-db\", false, \"Migrate database to supported version and exit\")\n 28→\tflag.BoolVar(&flagRevertDB, \"revert-db\", false, \"Migrate database to previous version and exit\")\n 29→\tflag.BoolVar(&flagApplyTags, \"apply-tags\", false, \"Run taggers on all completed jobs and exit\")\n 30→\tflag.BoolVar(&flagForceDB, \"force-db\", false, \"Force database version, clear dirty flag and exit\")\n 31→\tflag.BoolVar(&flagOptimizeDB, \"optimize-db\", false, \"Optimize database: run VACUUM to reclaim space, then ANALYZE to update query planner statistics\")\n 32→\tflag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")\n 33→\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n 34→\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n 35→\tflag.StringVar(&flagNewUser, \"add-user\", \"\", \"Add a new user. Argument format: <username>:[admin,support,manager,api,user]:<password>\")\n 36→\tflag.StringVar(&flagDelUser, \"del-user\", \"\", \"Remove a existing user. Argument format: <username>\")\n 37→\tflag.StringVar(&flagGenJWT, \"jwt\", \"\", \"Generate and print a JWT for the user specified by its `username`\")\n 38→\tflag.StringVar(&flagImportJob, \"import-job\", \"\", \"Import a job. Argument format: `<path-to-meta.json>:<path-to-data.json>,...`\")\n 39→\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info , warn (default), err, crit]`\")\n 40→\tflag.Parse()\n 41→}\n 42→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"82caec25-0703-4883-b80b-47b0fa22b6af","timestamp":"2026-04-01T13:30:40.930Z"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"29200e6f-e4ab-4bbd-a6e7-038664be8230","timestamp":"2026-04-01T13:30:40.932Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"29200e6f-e4ab-4bbd-a6e7-038664be8230","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01HAtNnx7RqKmHUJPgxXNPkK","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package main provides the entry point for the ClusterCockpit backend server.\n 7→// It orchestrates initialization of all subsystems including configuration,\n 8→// database, authentication, and the HTTP server.\n 9→package main\n 10→\n 11→import (\n 12→\t\"context\"\n 13→\t\"encoding/json\"\n 14→\t\"fmt\"\n 15→\t\"os\"\n 16→\t\"os/signal\"\n 17→\tgoruntime \"runtime\"\n 18→\t\"runtime/debug\"\n 19→\t\"strings\"\n 20→\t\"sync\"\n 21→\t\"syscall\"\n 22→\t\"time\"\n 23→\n 24→\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n 25→\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n 26→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n 27→\t\"github.com/ClusterCockpit/cc-backend/internal/importer\"\n 28→\t\"github.com/ClusterCockpit/cc-backend/internal/metricdispatch\"\n 29→\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n 30→\t\"github.com/ClusterCockpit/cc-backend/internal/tagger\"\n 31→\t\"github.com/ClusterCockpit/cc-backend/internal/taskmanager\"\n 32→\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n 33→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 34→\t\"github.com/ClusterCockpit/cc-backend/web\"\n 35→\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n 36→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 37→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 38→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 39→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 40→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 41→\t\"github.com/google/gops/agent\"\n 42→\t\"github.com/joho/godotenv\"\n 43→\n 44→\t_ \"github.com/mattn/go-sqlite3\"\n 45→)\n 46→\n 47→const logoString = `\n 48→ _____ _ _ ____ _ _ _\n 49→/ ___| |_ _ ___| |_ ___ _ __ / ___|___ ___| | ___ __ (_) |_\n 50→| | | | | | / __| __/ _ \\ '__| | / _ \\ / __| |/ / '_ \\| | __|\n 51→| |___| | |_| \\__ \\ || __/ | | |__| (_) | (__| <| |_) | | |_\n 52→\\_____|_|\\__,_|___/\\__\\___|_| \\____\\___/ \\___|_|\\_\\ .__/|_|\\__|\n 53→ |_|\n 54→`\n 55→\n 56→// Environment variable names\n 57→const (\n 58→\tenvGOGC = \"GOGC\"\n 59→)\n 60→\n 61→// Default configurations\n 62→const (\n 63→\tdefaultArchiveConfig = `{\"kind\":\"file\",\"path\":\"./var/job-archive\"}`\n 64→)\n 65→\n 66→var (\n 67→\tdate string\n 68→\tcommit string\n 69→\tversion string\n 70→)\n 71→\n 72→func printVersion() {\n 73→\tfmt.Print(logoString)\n 74→\tfmt.Printf(\"Version:\\t%s\\n\", version)\n 75→\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n 76→\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n 77→\tfmt.Printf(\"SQL db version:\\t%d\\n\", repository.Version)\n 78→\tfmt.Printf(\"Job archive version:\\t%d\\n\", archive.Version)\n 79→}\n 80→\n 81→func initGops() error {\n 82→\tif !flagGops {\n 83→\t\treturn nil\n 84→\t}\n 85→\n 86→\tif err := agent.Listen(agent.Options{}); err != nil {\n 87→\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n 88→\t}\n 89→\treturn nil\n 90→}\n 91→\n 92→func loadEnvironment() error {\n 93→\tif err := godotenv.Load(); err != nil {\n 94→\t\treturn fmt.Errorf(\"loading .env file: %w\", err)\n 95→\t}\n 96→\treturn nil\n 97→}\n 98→\n 99→func initConfiguration() error {\n 100→\tccconf.Init(flagConfigFile)\n 101→\n 102→\tcfg := ccconf.GetPackageConfig(\"main\")\n 103→\tif cfg == nil {\n 104→\t\treturn fmt.Errorf(\"main configuration must be present\")\n 105→\t}\n 106→\n 107→\tconfig.Init(cfg)\n 108→\treturn nil\n 109→}\n 110→\n 111→func initDatabase() error {\n 112→\tif config.Keys.DbConfig != nil {\n 113→\t\tcfg := repository.DefaultConfig()\n 114→\t\tdc := config.Keys.DbConfig\n 115→\t\tif dc.CacheSizeMB > 0 {\n 116→\t\t\tcfg.DbCacheSizeMB = dc.CacheSizeMB\n 117→\t\t}\n 118→\t\tif dc.SoftHeapLimitMB > 0 {\n 119→\t\t\tcfg.DbSoftHeapLimitMB = dc.SoftHeapLimitMB\n 120→\t\t}\n 121→\t\tif dc.MaxOpenConnections > 0 {\n 122→\t\t\tcfg.MaxOpenConnections = dc.MaxOpenConnections\n 123→\t\t}\n 124→\t\tif dc.MaxIdleConnections > 0 {\n 125→\t\t\tcfg.MaxIdleConnections = dc.MaxIdleConnections\n 126→\t\t}\n 127→\t\tif dc.ConnectionMaxIdleTimeMins > 0 {\n 128→\t\t\tcfg.ConnectionMaxIdleTime = time.Duration(dc.ConnectionMaxIdleTimeMins) * time.Minute\n 129→\t\t}\n 130→\t\tif dc.BusyTimeoutMs > 0 {\n 131→\t\t\tcfg.BusyTimeoutMs = dc.BusyTimeoutMs\n 132→\t\t}\n 133→\t\trepository.SetConfig(cfg)\n 134→\t}\n 135→\trepository.Connect(config.Keys.DB)\n 136→\treturn nil\n 137→}\n 138→\n 139→func handleDatabaseCommands() error {\n 140→\tif flagMigrateDB {\n 141→\t\terr := repository.MigrateDB(config.Keys.DB)\n 142→\t\tif err != nil {\n 143→\t\t\treturn fmt.Errorf(\"migrating database to version %d: %w\", repository.Version, err)\n 144→\t\t}\n 145→\t\tcclog.Exitf(\"MigrateDB Success: Migrated SQLite database at '%s' to version %d.\\n\",\n 146→\t\t\tconfig.Keys.DB, repository.Version)\n 147→\t}\n 148→\n 149→\tif flagRevertDB {\n 150→\t\terr := repository.RevertDB(config.Keys.DB)\n 151→\t\tif err != nil {\n 152→\t\t\treturn fmt.Errorf(\"reverting database to version %d: %w\", repository.Version-1, err)\n 153→\t\t}\n 154→\t\tcclog.Exitf(\"RevertDB Success: Reverted SQLite database at '%s' to version %d.\\n\",\n 155→\t\t\tconfig.Keys.DB, repository.Version-1)\n 156→\t}\n 157→\n 158→\tif flagForceDB {\n 159→\t\terr := repository.ForceDB(config.Keys.DB)\n 160→\t\tif err != nil {\n 161→\t\t\treturn fmt.Errorf(\"forcing database to version %d: %w\", repository.Version, err)\n 162→\t\t}\n 163→\t\tcclog.Exitf(\"ForceDB Success: Forced SQLite database at '%s' to version %d.\\n\",\n 164→\t\t\tconfig.Keys.DB, repository.Version)\n 165→\t}\n 166→\n 167→\treturn nil\n 168→}\n 169→\n 170→func handleUserCommands() error {\n 171→\tif config.Keys.DisableAuthentication && (flagNewUser != \"\" || flagDelUser != \"\") {\n 172→\t\treturn fmt.Errorf(\"--add-user and --del-user can only be used if authentication is enabled\")\n 173→\t}\n 174→\n 175→\tif !config.Keys.DisableAuthentication {\n 176→\t\tif cfg := ccconf.GetPackageConfig(\"auth\"); cfg != nil {\n 177→\t\t\tauth.Init(&cfg)\n 178→\t\t} else {\n 179→\t\t\tcclog.Warn(\"Authentication disabled due to missing configuration\")\n 180→\t\t\tauth.Init(nil)\n 181→\t\t}\n 182→\n 183→\t\t// Check for default security keys\n 184→\t\tcheckDefaultSecurityKeys()\n 185→\n 186→\t\tif flagNewUser != \"\" {\n 187→\t\t\tif err := addUser(flagNewUser); err != nil {\n 188→\t\t\t\treturn err\n 189→\t\t\t}\n 190→\t\t}\n 191→\n 192→\t\tif flagDelUser != \"\" {\n 193→\t\t\tif err := delUser(flagDelUser); err != nil {\n 194→\t\t\t\treturn err\n 195→\t\t\t}\n 196→\t\t}\n 197→\n 198→\t\tauthHandle := auth.GetAuthInstance()\n 199→\n 200→\t\tif flagSyncLDAP {\n 201→\t\t\tif err := syncLDAP(authHandle); err != nil {\n 202→\t\t\t\treturn err\n 203→\t\t\t}\n 204→\t\t}\n 205→\n 206→\t\tif flagGenJWT != \"\" {\n 207→\t\t\tif err := generateJWT(authHandle, flagGenJWT); err != nil {\n 208→\t\t\t\treturn err\n 209→\t\t\t}\n 210→\t\t}\n 211→\t}\n 212→\n 213→\treturn nil\n 214→}\n 215→\n 216→// checkDefaultSecurityKeys warns if default JWT keys are detected\n 217→func checkDefaultSecurityKeys() {\n 218→\t// Default JWT public key from init.go\n 219→\tdefaultJWTPublic := \"REDACTED\"\n 220→\n 221→\tif os.Getenv(\"JWT_PUBLIC_KEY\") == defaultJWTPublic {\n 222→\t\tcclog.Warn(\"Using default JWT keys - not recommended for production environments\")\n 223→\t}\n 224→}\n 225→\n 226→func addUser(userSpec string) error {\n 227→\tparts := strings.SplitN(userSpec, \":\", 3)\n 228→\tif len(parts) != 3 || len(parts[0]) == 0 {\n 229→\t\treturn fmt.Errorf(\"invalid user format, want: <username>:[admin,support,manager,api,user]:<password>, have: %s\", userSpec)\n 230→\t}\n 231→\n 232→\tur := repository.GetUserRepository()\n 233→\tif err := ur.AddUser(&schema.User{\n 234→\t\tUsername: parts[0],\n 235→\t\tProjects: make([]string, 0),\n 236→\t\tPassword: parts[2],\n 237→\t\tRoles: strings.Split(parts[1], \",\"),\n 238→\t}); err != nil {\n 239→\t\treturn fmt.Errorf(\"adding user '%s' with roles '%s': %w\", parts[0], parts[1], err)\n 240→\t}\n 241→\n 242→\tcclog.Infof(\"Add User: Added new user '%s' with roles '%s'\", parts[0], parts[1])\n 243→\treturn nil\n 244→}\n 245→\n 246→func delUser(username string) error {\n 247→\tur := repository.GetUserRepository()\n 248→\tif err := ur.DelUser(username); err != nil {\n 249→\t\treturn fmt.Errorf(\"deleting user '%s': %w\", username, err)\n 250→\t}\n 251→\tcclog.Infof(\"Delete User: Deleted user '%s' from DB\", username)\n 252→\treturn nil\n 253→}\n 254→\n 255→func syncLDAP(authHandle *auth.Authentication) error {\n 256→\tif authHandle.LdapAuth == nil {\n 257→\t\treturn fmt.Errorf(\"LDAP authentication is not configured\")\n 258→\t}\n 259→\n 260→\tif err := authHandle.LdapAuth.Sync(); err != nil {\n 261→\t\treturn fmt.Errorf(\"synchronizing LDAP: %w\", err)\n 262→\t}\n 263→\n 264→\tcclog.Print(\"Sync LDAP: LDAP synchronization successfull.\")\n 265→\treturn nil\n 266→}\n 267→\n 268→func generateJWT(authHandle *auth.Authentication, username string) error {\n 269→\tur := repository.GetUserRepository()\n 270→\tuser, err := ur.GetUser(username)\n 271→\tif err != nil {\n 272→\t\treturn fmt.Errorf(\"getting user '%s': %w\", username, err)\n 273→\t}\n 274→\n 275→\tif !user.HasRole(schema.RoleAPI) {\n 276→\t\tcclog.Warnf(\"JWT: User '%s' does not have the role 'api'. REST API endpoints will return error!\\n\", user.Username)\n 277→\t}\n 278→\n 279→\tjwt, err := authHandle.JwtAuth.ProvideJWT(user)\n 280→\tif err != nil {\n 281→\t\treturn fmt.Errorf(\"generating JWT for user '%s': %w\", user.Username, err)\n 282→\t}\n 283→\n 284→\tcclog.Printf(\"JWT: Successfully generated JWT for user '%s': %s\\n\", user.Username, jwt)\n 285→\treturn nil\n 286→}\n 287→\n 288→func initSubsystems() error {\n 289→\t// Initialize nats client\n 290→\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n 291→\tif err := nats.Init(natsConfig); err != nil {\n 292→\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n 293→\t}\n 294→\tnats.Connect()\n 295→\n 296→\t// Initialize job archive\n 297→\tarchiveCfg := ccconf.GetPackageConfig(\"archive\")\n 298→\tif archiveCfg == nil {\n 299→\t\tcclog.Debug(\"Archive configuration not found, using default archive configuration\")\n 300→\t\tarchiveCfg = json.RawMessage(defaultArchiveConfig)\n 301→\t}\n 302→\tif err := archive.Init(archiveCfg); err != nil {\n 303→\t\treturn fmt.Errorf(\"initializing archive: %w\", err)\n 304→\t}\n 305→\n 306→\t// Handle database re-initialization\n 307→\tif flagReinitDB {\n 308→\t\tif err := importer.InitDB(); err != nil {\n 309→\t\t\treturn fmt.Errorf(\"re-initializing repository DB: %w\", err)\n 310→\t\t}\n 311→\t\tcclog.Print(\"Init DB: Successfully re-initialized repository DB.\")\n 312→\t}\n 313→\n 314→\t// Handle job import\n 315→\tif flagImportJob != \"\" {\n 316→\t\tif err := importer.HandleImportFlag(flagImportJob); err != nil {\n 317→\t\t\treturn fmt.Errorf(\"importing job: %w\", err)\n 318→\t\t}\n 319→\t\tcclog.Infof(\"Import Job: Imported Job '%s' into DB\", flagImportJob)\n 320→\t}\n 321→\n 322→\t// Initialize taggers\n 323→\tif config.Keys.EnableJobTaggers {\n 324→\t\ttagger.Init()\n 325→\t}\n 326→\n 327→\t// Apply tags if requested\n 328→\tif flagApplyTags {\n 329→\t\ttagger.Init()\n 330→\n 331→\t\tif err := tagger.RunTaggers(); err != nil {\n 332→\t\t\treturn fmt.Errorf(\"running job taggers: %w\", err)\n 333→\t\t}\n 334→\t}\n 335→\n 336→\treturn nil\n 337→}\n 338→\n 339→func runServer(ctx context.Context) error {\n 340→\tvar wg sync.WaitGroup\n 341→\n 342→\t// Initialize metric store if configuration is provided\n 343→\thaveMetricstore := false\n 344→\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n 345→\tif mscfg != nil {\n 346→\t\tmetrics := metricstore.BuildMetricList()\n 347→\t\tmetricstore.Init(mscfg, metrics, &wg)\n 348→\n 349→\t\t// Inject repository as NodeProvider to break import cycle\n 350→\t\tms := metricstore.GetMemoryStore()\n 351→\t\tjobRepo := repository.GetJobRepository()\n 352→\t\tms.SetNodeProvider(jobRepo)\n 353→\t\tmetricstore.MetricStoreHandle = &metricstore.InternalMetricStore{}\n 354→\t\thaveMetricstore = true\n 355→\t} else {\n 356→\t\tmetricstore.MetricStoreHandle = nil\n 357→\t\tcclog.Debug(\"missing internal metricstore configuration\")\n 358→\t}\n 359→\n 360→\t// Initialize external metric stores if configuration is provided\n 361→\tmscfg = ccconf.GetPackageConfig(\"metric-store-external\")\n 362→\tif mscfg != nil {\n 363→\t\terr := metricdispatch.Init(mscfg)\n 364→\n 365→\t\tif err != nil {\n 366→\t\t\tcclog.Debugf(\"error while initializing external metricdispatch: %v\", err)\n 367→\t\t} else {\n 368→\t\t\thaveMetricstore = true\n 369→\t\t}\n 370→\t}\n 371→\n 372→\tif !haveMetricstore {\n 373→\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n 374→\t}\n 375→\n 376→\t// Start archiver and task manager\n 377→\tarchiver.Start(repository.GetJobRepository(), ctx)\n 378→\ttaskmanager.Start(ccconf.GetPackageConfig(\"cron\"), ccconf.GetPackageConfig(\"archive\"))\n 379→\n 380→\t// Initialize web UI\n 381→\tcfg := ccconf.GetPackageConfig(\"ui\")\n 382→\tif err := web.Init(cfg); err != nil {\n 383→\t\treturn fmt.Errorf(\"initializing web UI: %w\", err)\n 384→\t}\n 385→\n 386→\t// Initialize HTTP server\n 387→\tsrv, err := NewServer(version, commit, date)\n 388→\tif err != nil {\n 389→\t\treturn fmt.Errorf(\"creating server: %w\", err)\n 390→\t}\n 391→\n 392→\t// Channel to collect errors from server\n 393→\terrChan := make(chan error, 1)\n 394→\n 395→\t// Start HTTP server\n 396→\twg.Go(func() {\n 397→\t\tif err := srv.Start(ctx); err != nil {\n 398→\t\t\terrChan <- err\n 399→\t\t}\n 400→\t})\n 401→\n 402→\t// Handle shutdown signals\n 403→\twg.Add(1)\n 404→\tsigs := make(chan os.Signal, 1)\n 405→\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n 406→\tgo func() {\n 407→\t\tdefer wg.Done()\n 408→\t\tselect {\n 409→\t\tcase <-sigs:\n 410→\t\t\tcclog.Info(\"Shutdown signal received\")\n 411→\t\tcase <-ctx.Done():\n 412→\t\t}\n 413→\n 414→\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n 415→\t\tsrv.Shutdown(ctx)\n 416→\t\tutil.FsWatcherShutdown()\n 417→\t\ttaskmanager.Shutdown()\n 418→\t}()\n 419→\n 420→\t// Set GC percent if not configured\n 421→\tif os.Getenv(envGOGC) == \"\" {\n 422→\t\t// trigger GC when heap grows 15% above the previous live set\n 423→\t\tdebug.SetGCPercent(15)\n 424→\t}\n 425→\truntime.SystemdNotify(true, \"running\")\n 426→\n 427→\twaitDone := make(chan struct{})\n 428→\tgo func() {\n 429→\t\twg.Wait()\n 430→\t\tclose(waitDone)\n 431→\t}()\n 432→\n 433→\tgo func() {\n 434→\t\t<-waitDone\n 435→\t\tclose(errChan)\n 436→\t}()\n 437→\n 438→\t// Wait for either:\n 439→\t// 1. An error from server startup\n 440→\t// 2. Completion of all goroutines (normal shutdown or crash)\n 441→\tselect {\n 442→\tcase err := <-errChan:\n 443→\t\t// errChan will be closed when waitDone is closed, which happens\n 444→\t\t// when all goroutines complete (either from normal shutdown or error)\n 445→\t\tif err != nil {\n 446→\t\t\treturn err\n 447→\t\t}\n 448→\tcase <-time.After(100 * time.Millisecond):\n 449→\t\t// Give the server 100ms to start and report any immediate startup errors\n 450→\t\t// After that, just wait for normal shutdown completion\n 451→\t\tselect {\n 452→\t\tcase err := <-errChan:\n 453→\t\t\tif err != nil {\n 454→\t\t\t\treturn err\n 455→\t\t\t}\n 456→\t\tcase <-waitDone:\n 457→\t\t\t// Normal shutdown completed\n 458→\t\t}\n 459→\t}\n 460→\n 461→\tcclog.Print(\"Graceful shutdown completed!\")\n 462→\treturn nil\n 463→}\n 464→\n 465→func run() error {\n 466→\tcliInit()\n 467→\n 468→\tif flagVersion {\n 469→\t\tprintVersion()\n 470→\t\treturn nil\n 471→\t}\n 472→\n 473→\t// Initialize logger\n 474→\tcclog.Init(flagLogLevel, flagLogDateTime)\n 475→\n 476→\t// Handle init flag\n 477→\tif flagInit {\n 478→\t\tinitEnv()\n 479→\t\tcclog.Exit(\"Successfully setup environment!\\n\" +\n 480→\t\t\t\"Please review config.json and .env and adjust it to your needs.\\n\" +\n 481→\t\t\t\"Add your job-archive at ./var/job-archive.\")\n 482→\t}\n 483→\n 484→\t// Initialize gops agent\n 485→\tif err := initGops(); err != nil {\n 486→\t\treturn err\n 487→\t}\n 488→\n 489→\t// Initialize subsystems in dependency order:\n 490→\t// 1. Load environment variables from .env file (contains sensitive configuration)\n 491→\t// 2. Load configuration from config.json (may reference environment variables)\n 492→\t// 3. Handle database migration commands if requested\n 493→\t// 4. Initialize database connection (requires config for connection string)\n 494→\t// 5. Handle user commands if requested (requires database and authentication config)\n 495→\t// 6. Initialize subsystems like archive and metrics (require config and database)\n 496→\n 497→\t// Load environment and configuration\n 498→\tif err := loadEnvironment(); err != nil {\n 499→\t\treturn err\n 500→\t}\n 501→\n 502→\tif err := initConfiguration(); err != nil {\n 503→\t\treturn err\n 504→\t}\n 505→\n 506→\t// Handle database migration (migrate, revert, force)\n 507→\tif err := handleDatabaseCommands(); err != nil {\n 508→\t\treturn err\n 509→\t}\n 510→\n 511→\t// Initialize database\n 512→\tif err := initDatabase(); err != nil {\n 513→\t\treturn err\n 514→\t}\n 515→\n 516→\t// Optimize database if requested\n 517→\tif flagOptimizeDB {\n 518→\t\tdb := repository.GetConnection()\n 519→\t\tcclog.Print(\"Running VACUUM to reclaim space and defragment database...\")\n 520→\t\tif _, err := db.DB.Exec(\"VACUUM\"); err != nil {\n 521→\t\t\treturn fmt.Errorf(\"VACUUM failed: %w\", err)\n 522→\t\t}\n 523→\t\tcclog.Print(\"Running ANALYZE to update query planner statistics...\")\n 524→\t\tif _, err := db.DB.Exec(\"ANALYZE\"); err != nil {\n 525→\t\t\treturn fmt.Errorf(\"ANALYZE failed: %w\", err)\n 526→\t\t}\n 527→\t\tcclog.Exitf(\"OptimizeDB Success: Database '%s' optimized (VACUUM + ANALYZE).\\n\", config.Keys.DB)\n 528→\t}\n 529→\n 530→\t// Handle user commands (add, delete, sync, JWT)\n 531→\tif err := handleUserCommands(); err != nil {\n 532→\t\treturn err\n 533→\t}\n 534→\n 535→\t// Initialize subsystems (archive, metrics, taggers)\n 536→\tif err := initSubsystems(); err != nil {\n 537→\t\treturn err\n 538→\t}\n 539→\n 540→\t// Handle checkpoint cleanup\n 541→\tif flagCleanupCheckpoints {\n 542→\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n 543→\t\tif mscfg == nil {\n 544→\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n 545→\t\t}\n 546→\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n 547→\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n 548→\t\t}\n 549→\t\tif metricstore.Keys.NumWorkers <= 0 {\n 550→\t\t\tmetricstore.Keys.NumWorkers = min(goruntime.NumCPU()/2+1, metricstore.DefaultMaxWorkers)\n 551→\t\t}\n 552→\n 553→\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n 554→\t\tif err != nil {\n 555→\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n 556→\t\t}\n 557→\t\tfrom := time.Now().Add(-d)\n 558→\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n 559→\t\tcleanupDir := \"\"\n 560→\t\tif !deleteMode {\n 561→\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n 562→\t\t}\n 563→\n 564→\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n 565→\t\tn, err := metricstore.CleanupCheckpoints(\n 566→\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n 567→\t\tif err != nil {\n 568→\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n 569→\t\t}\n 570→\t\tif deleteMode {\n 571→\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files deleted.\", n)\n 572→\t\t} else {\n 573→\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n 574→\t\t}\n 575→\t}\n 576→\n 577→\t// Exit if start server is not requested\n 578→\tif !flagServer {\n 579→\t\tcclog.Exit(\"No errors, server flag not set. Exiting cc-backend.\")\n 580→\t}\n 581→\n 582→\t// Run server with context\n 583→\tctx, cancel := context.WithCancel(context.Background())\n 584→\tdefer cancel()\n 585→\n 586→\treturn runServer(ctx)\n 587→}\n 588→\n 589→func main() {\n 590→\tif err := run(); err != nil {\n 591→\t\tcclog.Error(err.Error())\n 592→\t\tos.Exit(1)\n 593→\t}\n 594→}\n 595→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"a91c7328-9a03-4bfd-a03f-c4ecca903281","timestamp":"2026-04-01T13:30:41.001Z"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"45afa5d2-2d0a-4ace-95df-c775c3f1436f","timestamp":"2026-04-01T13:30:41.115Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"45afa5d2-2d0a-4ace-95df-c775c3f1436f","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:30:41.160Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01GsrLXYEbD4U4U3FonCk7tu","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01YPM1Zh7sGrKeGHdLVjECi1","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/init.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":5,"cache_creation_input_tokens":509,"cache_read_input_tokens":15376,"cache_creation":{"ephemeral_5m_input_tokens":509,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd8fySpdARoFWHKJzUvH","uuid":"211ed394-e503-4008-8788-17537f3d5561"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"a2905c32-45c4-4454-942d-eab5a4ee82d1","timestamp":"2026-04-01T13:30:41.160Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"a2905c32-45c4-4454-942d-eab5a4ee82d1","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01YPM1Zh7sGrKeGHdLVjECi1","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package main provides the entry point for the ClusterCockpit backend server.\n 7→// This file contains bootstrap logic for initializing the environment,\n 8→// creating default configuration files, and setting up the database.\n 9→package main\n 10→\n 11→import (\n 12→\t\"encoding/json\"\n 13→\t\"os\"\n 14→\n 15→\t\"github.com/ClusterCockpit/cc-backend/internal/repository\"\n 16→\t\"github.com/ClusterCockpit/cc-backend/pkg/archive\"\n 17→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 18→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 19→)\n 20→\n 21→const envString = `\n 22→# Base64 encoded Ed25519 keys (DO NOT USE THESE TWO IN PRODUCTION!)\n 23→# You can generate your own keypair using the gen-keypair tool\n 24→JWT_PUBLIC_KEY=\"REDACTED\"\n 25→JWT_PRIVATE_KEY=\"REDACTED\"\n 26→\n 27→# Some random bytes used as secret for cookie-based sessions (DO NOT USE THIS ONE IN PRODUCTION)\n 28→SESSION_KEY=\"REDACTED\"\n 29→`\n 30→\n 31→const configString = `\n 32→{\n 33→ \"main\": {\n 34→ \"addr\": \"127.0.0.1:8080\",\n 35→ \"short-running-jobs-duration\": 300,\n 36→ \"resampling\": {\n 37→ \"minimum-points\": 600,\n 38→ \"trigger\": 300,\n 39→ \"resolutions\": [\n 40→ 240,\n 41→ 60\n 42→ ]\n 43→ },\n 44→ \"api-allowed-ips\": [\n 45→ \"*\"\n 46→ ],\n 47→ \"emission-constant\": 317\n 48→ },\n 49→ \"cron\": {\n 50→ \"commit-job-worker\": \"1m\",\n 51→ \"duration-worker\": \"5m\",\n 52→ \"footprint-worker\": \"10m\"\n 53→ },\n 54→ \"archive\": {\n 55→ \"kind\": \"file\",\n 56→ \"path\": \"./var/job-archive\"\n 57→ },\n 58→ \"auth\": {\n 59→ \"jwts\": {\n 60→ \"max-age\": \"2000h\"\n 61→ }\n 62→ }\n 63→}\n 64→`\n 65→\n 66→func initEnv() {\n 67→\tif util.CheckFileExists(\"var\") {\n 68→\t\tcclog.Exit(\"Directory ./var already exists. Cautiously exiting application initialization.\")\n 69→\t}\n 70→\n 71→\tif err := os.WriteFile(\"config.json\", []byte(configString), 0o666); err != nil {\n 72→\t\tcclog.Abortf(\"Could not write default ./config.json with permissions '0o666'. Application initialization failed, exited.\\nError: %s\\n\", err.Error())\n 73→\t}\n 74→\n 75→\tif err := os.WriteFile(\".env\", []byte(envString), 0o666); err != nil {\n 76→\t\tcclog.Abortf(\"Could not write default ./.env file with permissions '0o666'. Application initialization failed, exited.\\nError: %s\\n\", err.Error())\n 77→\t}\n 78→\n 79→\tif err := os.Mkdir(\"var\", 0o777); err != nil {\n 80→\t\tcclog.Abortf(\"Could not create default ./var folder with permissions '0o777'. Application initialization failed, exited.\\nError: %s\\n\", err.Error())\n 81→\t}\n 82→\n 83→\terr := repository.MigrateDB(\"./var/job.db\")\n 84→\tif err != nil {\n 85→\t\tcclog.Abortf(\"Could not initialize default SQLite database as './var/job.db'. Application initialization failed, exited.\\nError: %s\\n\", err.Error())\n 86→\t}\n 87→\tif err := os.Mkdir(\"var/job-archive\", 0o777); err != nil {\n 88→\t\tcclog.Abortf(\"Could not create default ./var/job-archive folder with permissions '0o777'. Application initialization failed, exited.\\nError: %s\\n\", err.Error())\n 89→\t}\n 90→\tarchiveCfg := \"{\\\"kind\\\": \\\"file\\\",\\\"path\\\": \\\"./var/job-archive\\\"}\"\n 91→\tif err := archive.Init(json.RawMessage(archiveCfg)); err != nil {\n 92→\t\tcclog.Abortf(\"Could not initialize job-archive, exited.\\nError: %s\\n\", err.Error())\n 93→\t}\n 94→}\n 95→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"c936ea8b-a1f9-4802-9e14-918322be66a3","timestamp":"2026-04-01T13:30:41.177Z"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"a2ff4954-c562-416d-9942-25b6a174148e","timestamp":"2026-04-01T13:30:41.178Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"a2ff4954-c562-416d-9942-25b6a174148e","isSidechain":false,"type":"progress","data":{"message":{"type":"assistant","timestamp":"2026-04-01T13:30:41.178Z","message":{"model":"claude-haiku-4-5-20251001","id":"msg_01GsrLXYEbD4U4U3FonCk7tu","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01Aa3kovSSAgAKwqzSioujBu","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/server.go"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":5,"cache_creation_input_tokens":509,"cache_read_input_tokens":15376,"cache_creation":{"ephemeral_5m_input_tokens":509,"ephemeral_1h_input_tokens":0},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"requestId":"req_011CZd8fySpdARoFWHKJzUvH","uuid":"1f70f7da-1790-416c-ad57-0a70f6ee58d7"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"de6f8731-d9ff-4674-b794-f134b5a925e4","timestamp":"2026-04-01T13:30:41.178Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"de6f8731-d9ff-4674-b794-f134b5a925e4","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Aa3kovSSAgAKwqzSioujBu","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package main provides the entry point for the ClusterCockpit backend server.\n 7→// This file contains HTTP server setup, routing configuration, and\n 8→// authentication middleware integration.\n 9→package main\n 10→\n 11→import (\n 12→\t\"context\"\n 13→\t\"crypto/tls\"\n 14→\t\"encoding/json\"\n 15→\t\"errors\"\n 16→\t\"fmt\"\n 17→\t\"net\"\n 18→\t\"net/http\"\n 19→\t\"os\"\n 20→\t\"strings\"\n 21→\t\"sync\"\n 22→\t\"time\"\n 23→\n 24→\t\"github.com/99designs/gqlgen/graphql\"\n 25→\t\"github.com/99designs/gqlgen/graphql/handler\"\n 26→\t\"github.com/99designs/gqlgen/graphql/handler/transport\"\n 27→\t\"github.com/99designs/gqlgen/graphql/playground\"\n 28→\t\"github.com/ClusterCockpit/cc-backend/internal/api\"\n 29→\t\"github.com/ClusterCockpit/cc-backend/internal/archiver\"\n 30→\t\"github.com/ClusterCockpit/cc-backend/internal/auth\"\n 31→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n 32→\t\"github.com/ClusterCockpit/cc-backend/internal/graph\"\n 33→\t\"github.com/ClusterCockpit/cc-backend/internal/graph/generated\"\n 34→\t\"github.com/ClusterCockpit/cc-backend/internal/routerConfig\"\n 35→\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n 36→\t\"github.com/ClusterCockpit/cc-backend/web\"\n 37→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 38→\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n 39→\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n 40→\t\"github.com/go-chi/chi/v5\"\n 41→\t\"github.com/go-chi/chi/v5/middleware\"\n 42→\t\"github.com/go-chi/cors\"\n 43→\thttpSwagger \"github.com/swaggo/http-swagger\"\n 44→)\n 45→\n 46→var buildInfo web.Build\n 47→\n 48→// Environment variable names\n 49→const (\n 50→\tenvDebug = \"DEBUG\"\n 51→)\n 52→\n 53→// Server encapsulates the HTTP server state and dependencies\n 54→type Server struct {\n 55→\trouter chi.Router\n 56→\tserver *http.Server\n 57→\trestAPIHandle *api.RestAPI\n 58→\tnatsAPIHandle *api.NatsAPI\n 59→}\n 60→\n 61→func onFailureResponse(rw http.ResponseWriter, r *http.Request, err error) {\n 62→\trw.Header().Add(\"Content-Type\", \"application/json\")\n 63→\trw.WriteHeader(http.StatusUnauthorized)\n 64→\tjson.NewEncoder(rw).Encode(map[string]string{\n 65→\t\t\"status\": http.StatusText(http.StatusUnauthorized),\n 66→\t\t\"error\": err.Error(),\n 67→\t})\n 68→}\n 69→\n 70→// NewServer creates and initializes a new Server instance\n 71→func NewServer(version, commit, buildDate string) (*Server, error) {\n 72→\tbuildInfo = web.Build{Version: version, Hash: commit, Buildtime: buildDate}\n 73→\n 74→\ts := &Server{\n 75→\t\trouter: chi.NewRouter(),\n 76→\t}\n 77→\n 78→\tif err := s.init(); err != nil {\n 79→\t\treturn nil, err\n 80→\t}\n 81→\n 82→\treturn s, nil\n 83→}\n 84→\n 85→func (s *Server) init() error {\n 86→\t// Setup the http.Handler/Router used by the server\n 87→\tgraph.Init()\n 88→\tresolver := graph.GetResolverInstance()\n 89→\tgraphQLServer := handler.New(\n 90→\t\tgenerated.NewExecutableSchema(generated.Config{Resolvers: resolver}))\n 91→\n 92→\tgraphQLServer.AddTransport(transport.POST{})\n 93→\n 94→\t// Inject a per-request stats cache so that grouped statistics queries\n 95→\t// sharing the same (filter, groupBy) pair are executed only once.\n 96→\tgraphQLServer.AroundOperations(func(ctx context.Context, next graphql.OperationHandler) graphql.ResponseHandler {\n 97→\t\treturn next(graph.WithStatsGroupCache(ctx))\n 98→\t})\n 99→\n 100→\tif os.Getenv(envDebug) != \"1\" {\n 101→\t\t// Having this handler means that a error message is returned via GraphQL instead of the connection simply beeing closed.\n 102→\t\t// The problem with this is that then, no more stacktrace is printed to stderr.\n 103→\t\tgraphQLServer.SetRecoverFunc(func(ctx context.Context, err any) error {\n 104→\t\t\tswitch e := err.(type) {\n 105→\t\t\tcase string:\n 106→\t\t\t\treturn fmt.Errorf(\"MAIN > Panic: %s\", e)\n 107→\t\t\tcase error:\n 108→\t\t\t\treturn fmt.Errorf(\"MAIN > Panic caused by: %s\", e.Error())\n 109→\t\t\t}\n 110→\n 111→\t\t\treturn errors.New(\"MAIN > Internal server error (panic)\")\n 112→\t\t})\n 113→\t}\n 114→\n 115→\tauthHandle := auth.GetAuthInstance()\n 116→\n 117→\t// Middleware must be defined before routes in chi\n 118→\ts.router.Use(func(next http.Handler) http.Handler {\n 119→\t\treturn http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n 120→\t\t\tstart := time.Now()\n 121→\t\t\tww := middleware.NewWrapResponseWriter(rw, r.ProtoMajor)\n 122→\t\t\tnext.ServeHTTP(ww, r)\n 123→\t\t\tcclog.Debugf(\"%s %s (%d, %.02fkb, %dms)\",\n 124→\t\t\t\tr.Method, r.URL.RequestURI(),\n 125→\t\t\t\tww.Status(), float32(ww.BytesWritten())/1024,\n 126→\t\t\t\ttime.Since(start).Milliseconds())\n 127→\t\t})\n 128→\t})\n 129→\ts.router.Use(middleware.Compress(5))\n 130→\ts.router.Use(middleware.Recoverer)\n 131→\ts.router.Use(cors.Handler(cors.Options{\n 132→\t\tAllowCredentials: true,\n 133→\t\tAllowedHeaders: []string{\"X-Requested-With\", \"Content-Type\", \"Authorization\", \"Origin\"},\n 134→\t\tAllowedMethods: []string{\"GET\", \"POST\", \"HEAD\", \"OPTIONS\"},\n 135→\t\tAllowedOrigins: []string{\"*\"},\n 136→\t}))\n 137→\n 138→\ts.restAPIHandle = api.New()\n 139→\n 140→\tinfo := map[string]any{}\n 141→\tinfo[\"hasOpenIDConnect\"] = false\n 142→\n 143→\tif auth.Keys.OpenIDConfig != nil {\n 144→\t\topenIDConnect := auth.NewOIDC(authHandle)\n 145→\t\topenIDConnect.RegisterEndpoints(s.router)\n 146→\t\tinfo[\"hasOpenIDConnect\"] = true\n 147→\t}\n 148→\n 149→\ts.router.Get(\"/login\", func(rw http.ResponseWriter, r *http.Request) {\n 150→\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n 151→\t\tcclog.Debugf(\"##%v##\", info)\n 152→\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{Title: \"Login\", Build: buildInfo, Infos: info})\n 153→\t})\n 154→\ts.router.HandleFunc(\"/imprint\", func(rw http.ResponseWriter, r *http.Request) {\n 155→\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n 156→\t\tweb.RenderTemplate(rw, \"imprint.tmpl\", &web.Page{Title: \"Imprint\", Build: buildInfo})\n 157→\t})\n 158→\ts.router.HandleFunc(\"/privacy\", func(rw http.ResponseWriter, r *http.Request) {\n 159→\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n 160→\t\tweb.RenderTemplate(rw, \"privacy.tmpl\", &web.Page{Title: \"Privacy\", Build: buildInfo})\n 161→\t})\n 162→\n 163→\tif !config.Keys.DisableAuthentication {\n 164→\t\t// Create login failure handler (used by both /login and /jwt-login)\n 165→\t\tloginFailureHandler := func(rw http.ResponseWriter, r *http.Request, err error) {\n 166→\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n 167→\t\t\trw.WriteHeader(http.StatusUnauthorized)\n 168→\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n 169→\t\t\t\tTitle: \"Login failed - ClusterCockpit\",\n 170→\t\t\t\tMsgType: \"alert-warning\",\n 171→\t\t\t\tMessage: err.Error(),\n 172→\t\t\t\tBuild: buildInfo,\n 173→\t\t\t\tInfos: info,\n 174→\t\t\t})\n 175→\t\t}\n 176→\n 177→\t\ts.router.Post(\"/login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n 178→\t\ts.router.HandleFunc(\"/jwt-login\", authHandle.Login(loginFailureHandler).ServeHTTP)\n 179→\n 180→\t\ts.router.Post(\"/logout\", authHandle.Logout(\n 181→\t\t\thttp.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n 182→\t\t\t\trw.Header().Add(\"Content-Type\", \"text/html; charset=utf-8\")\n 183→\t\t\t\trw.WriteHeader(http.StatusOK)\n 184→\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n 185→\t\t\t\t\tTitle: \"Bye - ClusterCockpit\",\n 186→\t\t\t\t\tMsgType: \"alert-info\",\n 187→\t\t\t\t\tMessage: \"Logout successful\",\n 188→\t\t\t\t\tBuild: buildInfo,\n 189→\t\t\t\t\tInfos: info,\n 190→\t\t\t\t})\n 191→\t\t\t})).ServeHTTP)\n 192→\t}\n 193→\n 194→\tif flagDev {\n 195→\t\ts.router.Handle(\"/playground\", playground.Handler(\"GraphQL playground\", \"/query\"))\n 196→\t\ts.router.Get(\"/swagger/*\", httpSwagger.Handler(\n 197→\t\t\thttpSwagger.URL(\"http://\"+config.Keys.Addr+\"/swagger/doc.json\")))\n 198→\t}\n 199→\n 200→\t// Secured routes (require authentication)\n 201→\ts.router.Group(func(secured chi.Router) {\n 202→\t\tif !config.Keys.DisableAuthentication {\n 203→\t\t\tsecured.Use(func(next http.Handler) http.Handler {\n 204→\t\t\t\treturn authHandle.Auth(\n 205→\t\t\t\t\tnext,\n 206→\t\t\t\t\tfunc(rw http.ResponseWriter, r *http.Request, err error) {\n 207→\t\t\t\t\t\trw.WriteHeader(http.StatusUnauthorized)\n 208→\t\t\t\t\t\tweb.RenderTemplate(rw, \"login.tmpl\", &web.Page{\n 209→\t\t\t\t\t\t\tTitle: \"Authentication failed - ClusterCockpit\",\n 210→\t\t\t\t\t\t\tMsgType: \"alert-danger\",\n 211→\t\t\t\t\t\t\tMessage: err.Error(),\n 212→\t\t\t\t\t\t\tBuild: buildInfo,\n 213→\t\t\t\t\t\t\tInfos: info,\n 214→\t\t\t\t\t\t\tRedirect: r.RequestURI,\n 215→\t\t\t\t\t\t})\n 216→\t\t\t\t\t})\n 217→\t\t\t})\n 218→\t\t}\n 219→\n 220→\t\tsecured.Handle(\"/query\", graphQLServer)\n 221→\n 222→\t\tsecured.HandleFunc(\"/search\", func(rw http.ResponseWriter, r *http.Request) {\n 223→\t\t\trouterConfig.HandleSearchBar(rw, r, buildInfo)\n 224→\t\t})\n 225→\n 226→\t\trouterConfig.SetupRoutes(secured, buildInfo)\n 227→\t})\n 228→\n 229→\t// API routes (JWT token auth)\n 230→\ts.router.Route(\"/api\", func(apiRouter chi.Router) {\n 231→\t\t// Main API routes with API auth\n 232→\t\tapiRouter.Group(func(securedapi chi.Router) {\n 233→\t\t\tif !config.Keys.DisableAuthentication {\n 234→\t\t\t\tsecuredapi.Use(func(next http.Handler) http.Handler {\n 235→\t\t\t\t\treturn authHandle.AuthAPI(next, onFailureResponse)\n 236→\t\t\t\t})\n 237→\t\t\t}\n 238→\t\t\ts.restAPIHandle.MountAPIRoutes(securedapi)\n 239→\t\t})\n 240→\n 241→\t\t// Metric store API routes with separate auth\n 242→\t\tapiRouter.Group(func(metricstoreapi chi.Router) {\n 243→\t\t\tif !config.Keys.DisableAuthentication {\n 244→\t\t\t\tmetricstoreapi.Use(func(next http.Handler) http.Handler {\n 245→\t\t\t\t\treturn authHandle.AuthMetricStoreAPI(next, onFailureResponse)\n 246→\t\t\t\t})\n 247→\t\t\t}\n 248→\t\t\ts.restAPIHandle.MountMetricStoreAPIRoutes(metricstoreapi)\n 249→\t\t})\n 250→\t})\n 251→\n 252→\t// User API routes\n 253→\ts.router.Route(\"/userapi\", func(userapi chi.Router) {\n 254→\t\tif !config.Keys.DisableAuthentication {\n 255→\t\t\tuserapi.Use(func(next http.Handler) http.Handler {\n 256→\t\t\t\treturn authHandle.AuthUserAPI(next, onFailureResponse)\n 257→\t\t\t})\n 258→\t\t}\n 259→\t\ts.restAPIHandle.MountUserAPIRoutes(userapi)\n 260→\t})\n 261→\n 262→\t// Config API routes (uses Group with full paths to avoid shadowing\n 263→\t// the /config page route that is registered in the secured group)\n 264→\ts.router.Group(func(configapi chi.Router) {\n 265→\t\tif !config.Keys.DisableAuthentication {\n 266→\t\t\tconfigapi.Use(func(next http.Handler) http.Handler {\n 267→\t\t\t\treturn authHandle.AuthConfigAPI(next, onFailureResponse)\n 268→\t\t\t})\n 269→\t\t}\n 270→\t\ts.restAPIHandle.MountConfigAPIRoutes(configapi)\n 271→\t})\n 272→\n 273→\t// Frontend API routes\n 274→\ts.router.Route(\"/frontend\", func(frontendapi chi.Router) {\n 275→\t\tif !config.Keys.DisableAuthentication {\n 276→\t\t\tfrontendapi.Use(func(next http.Handler) http.Handler {\n 277→\t\t\t\treturn authHandle.AuthFrontendAPI(next, onFailureResponse)\n 278→\t\t\t})\n 279→\t\t}\n 280→\t\ts.restAPIHandle.MountFrontendAPIRoutes(frontendapi)\n 281→\t})\n 282→\n 283→\tif config.Keys.APISubjects != nil {\n 284→\t\ts.natsAPIHandle = api.NewNatsAPI()\n 285→\t\tif err := s.natsAPIHandle.StartSubscriptions(); err != nil {\n 286→\t\t\treturn fmt.Errorf(\"starting NATS subscriptions: %w\", err)\n 287→\t\t}\n 288→\t}\n 289→\n 290→\t// 404 handler for pages and API routes\n 291→\tnotFoundHandler := func(rw http.ResponseWriter, r *http.Request) {\n 292→\t\tif strings.HasPrefix(r.URL.Path, \"/api/\") || strings.HasPrefix(r.URL.Path, \"/userapi/\") ||\n 293→\t\t\tstrings.HasPrefix(r.URL.Path, \"/frontend/\") || strings.HasPrefix(r.URL.Path, \"/config/\") {\n 294→\t\t\trw.Header().Set(\"Content-Type\", \"application/json\")\n 295→\t\t\trw.WriteHeader(http.StatusNotFound)\n 296→\t\t\tjson.NewEncoder(rw).Encode(map[string]string{\n 297→\t\t\t\t\"status\": \"Resource not found\",\n 298→\t\t\t\t\"error\": \"the requested endpoint does not exist\",\n 299→\t\t\t})\n 300→\t\t\treturn\n 301→\t\t}\n 302→\t\trw.Header().Set(\"Content-Type\", \"text/html; charset=utf-8\")\n 303→\t\trw.WriteHeader(http.StatusNotFound)\n 304→\t\tweb.RenderTemplate(rw, \"404.tmpl\", &web.Page{\n 305→\t\t\tTitle: \"Page Not Found\",\n 306→\t\t\tBuild: buildInfo,\n 307→\t\t})\n 308→\t}\n 309→\n 310→\t// Set NotFound on the router so chi uses it for all unmatched routes,\n 311→\t// including those under subrouters like /api, /userapi, /frontend, etc.\n 312→\ts.router.NotFound(notFoundHandler)\n 313→\n 314→\tif config.Keys.EmbedStaticFiles {\n 315→\t\tif i, err := os.Stat(\"./var/img\"); err == nil {\n 316→\t\t\tif i.IsDir() {\n 317→\t\t\t\tcclog.Info(\"Use local directory for static images\")\n 318→\t\t\t\ts.router.Handle(\"/img/*\", http.StripPrefix(\"/img/\", http.FileServer(http.Dir(\"./var/img\"))))\n 319→\t\t\t}\n 320→\t\t}\n 321→\t\tfileServer := http.StripPrefix(\"/\", web.ServeFiles())\n 322→\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n 323→\t\t\tif web.StaticFileExists(r.URL.Path) {\n 324→\t\t\t\tfileServer.ServeHTTP(rw, r)\n 325→\t\t\t\treturn\n 326→\t\t\t}\n 327→\t\t\tnotFoundHandler(rw, r)\n 328→\t\t}))\n 329→\t} else {\n 330→\t\tstaticDir := http.Dir(config.Keys.StaticFiles)\n 331→\t\tfileServer := http.FileServer(staticDir)\n 332→\t\ts.router.Handle(\"/*\", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {\n 333→\t\t\tf, err := staticDir.Open(r.URL.Path)\n 334→\t\t\tif err == nil {\n 335→\t\t\t\tf.Close()\n 336→\t\t\t\tfileServer.ServeHTTP(rw, r)\n 337→\t\t\t\treturn\n 338→\t\t\t}\n 339→\t\t\tnotFoundHandler(rw, r)\n 340→\t\t}))\n 341→\t}\n 342→\n 343→\treturn nil\n 344→}\n 345→\n 346→// Server timeout defaults (in seconds)\n 347→const (\n 348→\tdefaultReadHeaderTimeout = 20\n 349→\tdefaultWriteTimeout = 20\n 350→)\n 351→\n 352→func (s *Server) Start(ctx context.Context) error {\n 353→\t// Use configurable timeouts with defaults\n 354→\treadHeaderTimeout := time.Duration(defaultReadHeaderTimeout) * time.Second\n 355→\twriteTimeout := time.Duration(defaultWriteTimeout) * time.Second\n 356→\n 357→\ts.server = &http.Server{\n 358→\t\tReadHeaderTimeout: readHeaderTimeout,\n 359→\t\tWriteTimeout: writeTimeout,\n 360→\t\tHandler: s.router,\n 361→\t\tAddr: config.Keys.Addr,\n 362→\t}\n 363→\n 364→\t// Start http or https server\n 365→\tlistener, err := net.Listen(\"tcp\", config.Keys.Addr)\n 366→\tif err != nil {\n 367→\t\treturn fmt.Errorf(\"starting listener on '%s': %w\", config.Keys.Addr, err)\n 368→\t}\n 369→\n 370→\tif !strings.HasSuffix(config.Keys.Addr, \":80\") && config.Keys.RedirectHTTPTo != \"\" {\n 371→\t\tgo func() {\n 372→\t\t\thttp.ListenAndServe(\":80\", http.RedirectHandler(config.Keys.RedirectHTTPTo, http.StatusMovedPermanently))\n 373→\t\t}()\n 374→\t}\n 375→\n 376→\tif config.Keys.HTTPSCertFile != \"\" && config.Keys.HTTPSKeyFile != \"\" {\n 377→\t\tcert, err := tls.LoadX509KeyPair(\n 378→\t\t\tconfig.Keys.HTTPSCertFile, config.Keys.HTTPSKeyFile)\n 379→\t\tif err != nil {\n 380→\t\t\treturn fmt.Errorf(\"loading X509 keypair (check 'https-cert-file' and 'https-key-file' in config.json): %w\", err)\n 381→\t\t}\n 382→\t\tlistener = tls.NewListener(listener, &tls.Config{\n 383→\t\t\tCertificates: []tls.Certificate{cert},\n 384→\t\t\tCipherSuites: []uint16{\n 385→\t\t\t\ttls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,\n 386→\t\t\t\ttls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,\n 387→\t\t\t},\n 388→\t\t\tMinVersion: tls.VersionTLS12,\n 389→\t\t\tPreferServerCipherSuites: true,\n 390→\t\t})\n 391→\t\tcclog.Infof(\"HTTPS server listening at %s...\", config.Keys.Addr)\n 392→\t} else {\n 393→\t\tcclog.Infof(\"HTTP server listening at %s...\", config.Keys.Addr)\n 394→\t}\n 395→\t//\n 396→\t// Because this program will want to bind to a privileged port (like 80), the listener must\n 397→\t// be established first, then the user can be changed, and after that,\n 398→\t// the actual http server can be started.\n 399→\tif err := runtime.DropPrivileges(config.Keys.Group, config.Keys.User); err != nil {\n 400→\t\treturn fmt.Errorf(\"dropping privileges: %w\", err)\n 401→\t}\n 402→\n 403→\tif err = s.server.Serve(listener); err != nil && err != http.ErrServerClosed {\n 404→\t\treturn fmt.Errorf(\"server failed: %w\", err)\n 405→\t}\n 406→\treturn nil\n 407→}\n 408→\n 409→func (s *Server) Shutdown(ctx context.Context) {\n 410→\tshutdownStart := time.Now()\n 411→\n 412→\tnatsStart := time.Now()\n 413→\tnc := nats.GetClient()\n 414→\tif nc != nil {\n 415→\t\tnc.Close()\n 416→\t}\n 417→\tcclog.Infof(\"Shutdown: NATS closed (%v)\", time.Since(natsStart))\n 418→\n 419→\thttpStart := time.Now()\n 420→\tshutdownCtx, cancel := context.WithTimeout(ctx, 60*time.Second)\n 421→\tdefer cancel()\n 422→\tif err := s.server.Shutdown(shutdownCtx); err != nil {\n 423→\t\tcclog.Errorf(\"Server shutdown error: %v\", err)\n 424→\t}\n 425→\tcclog.Infof(\"Shutdown: HTTP server stopped (%v)\", time.Since(httpStart))\n 426→\n 427→\t// Run metricstore and archiver shutdown concurrently.\n 428→\t// They are independent: metricstore writes .bin snapshots,\n 429→\t// archiver flushes pending job archives.\n 430→\tstoreStart := time.Now()\n 431→\tdone := make(chan struct{})\n 432→\tgo func() {\n 433→\t\tdefer close(done)\n 434→\t\tvar wg sync.WaitGroup\n 435→\n 436→\t\tif ms := metricstore.GetMemoryStore(); ms != nil {\n 437→\t\t\twg.Go(func() {\n 438→\t\t\t\tmetricstore.Shutdown()\n 439→\t\t\t})\n 440→\t\t}\n 441→\n 442→\t\twg.Go(func() {\n 443→\t\t\tif err := archiver.Shutdown(60 * time.Second); err != nil {\n 444→\t\t\t\tcclog.Warnf(\"Archiver shutdown: %v\", err)\n 445→\t\t\t}\n 446→\t\t})\n 447→\n 448→\t\twg.Wait()\n 449→\t}()\n 450→\n 451→\tselect {\n 452→\tcase <-done:\n 453→\t\tcclog.Infof(\"Shutdown: metricstore + archiver completed (%v)\", time.Since(storeStart))\n 454→\tcase <-time.After(60 * time.Second):\n 455→\t\tcclog.Warnf(\"Shutdown deadline exceeded after %v, forcing exit\", time.Since(shutdownStart))\n 456→\t}\n 457→\n 458→\tcclog.Infof(\"Shutdown: total time %v\", time.Since(shutdownStart))\n 459→}\n 460→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"0ee761e0-5236-4cff-b449-daa4ef42ff6c","timestamp":"2026-04-01T13:30:41.437Z"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"f3608202-48dc-42f4-b170-1f2cc71b76d5","timestamp":"2026-04-01T13:30:41.439Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"8f9782d6-206c-43d7-b54e-7662334ef090","isSidechain":false,"type":"progress","data":{"message":{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01JStvsXezwvBqDVvJDH5ugk","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// Package metricstore provides an efficient in-memory time-series metric storage system\n 7→// with support for hierarchical data organization, checkpointing, and archiving.\n 8→//\n 9→// The package organizes metrics in a tree structure (cluster → host → component) and\n 10→// provides concurrent read/write access to metric data with configurable aggregation strategies.\n 11→// Background goroutines handle periodic checkpointing (JSON or WAL/binary format), archiving old data,\n 12→// and enforcing retention policies.\n 13→//\n 14→// Key features:\n 15→// - In-memory metric storage with configurable retention\n 16→// - Hierarchical data organization (selectors)\n 17→// - Concurrent checkpoint/archive workers\n 18→// - Support for sum and average aggregation\n 19→// - NATS integration for metric ingestion via InfluxDB line protocol\n 20→package metricstore\n 21→\n 22→import (\n 23→\t\"bytes\"\n 24→\t\"context\"\n 25→\t\"encoding/json\"\n 26→\t\"errors\"\n 27→\t\"fmt\"\n 28→\t\"runtime\"\n 29→\t\"runtime/debug\"\n 30→\t\"slices\"\n 31→\t\"sync\"\n 32→\t\"time\"\n 33→\n 34→\t\"github.com/ClusterCockpit/cc-backend/internal/config\"\n 35→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 36→\t\"github.com/ClusterCockpit/cc-lib/v2/resampler\"\n 37→\t\"github.com/ClusterCockpit/cc-lib/v2/schema\"\n 38→\t\"github.com/ClusterCockpit/cc-lib/v2/util\"\n 39→)\n 40→\n 41→// GlobalState holds the global state for the metric store with thread-safe access.\n 42→type GlobalState struct {\n 43→\tmu sync.RWMutex\n 44→\tlastRetentionTime int64\n 45→\tselectorsExcluded bool\n 46→}\n 47→\n 48→var (\n 49→\tsingleton sync.Once\n 50→\tmsInstance *MemoryStore\n 51→\t// shutdownFunc stores the context cancellation function created in Init\n 52→\t// and is called during Shutdown to cancel all background goroutines\n 53→\tshutdownFunc context.CancelFunc\n 54→\tshutdownFuncMu sync.Mutex // Protects shutdownFunc from concurrent access\n 55→\t// Create a global instance\n 56→\tstate = &GlobalState{}\n 57→)\n 58→\n 59→// NodeProvider provides information about nodes currently in use by running jobs.\n 60→//\n 61→// This interface allows metricstore to query job information without directly\n 62→// depending on the repository package, breaking the import cycle.\n 63→//\n 64→// Implementations should return nodes that are actively processing jobs started\n 65→// before the given timestamp. These nodes will be excluded from retention-based\n 66→// garbage collection to prevent data loss for jobs that are still running or\n 67→// recently completed.\n 68→type NodeProvider interface {\n 69→\t// GetUsedNodes returns a map of cluster names to sorted lists of unique hostnames\n 70→\t// that are currently in use by jobs that started before the given timestamp.\n 71→\t//\n 72→\t// Parameters:\n 73→\t// - ts: Unix timestamp threshold - returns nodes with jobs started before this time\n 74→\t//\n 75→\t// Returns:\n 76→\t// - Map of cluster names to lists of node hostnames that should be excluded from garbage collection\n 77→\t// - Error if the query fails\n 78→\tGetUsedNodes(ts int64) (map[string][]string, error)\n 79→}\n 80→\n 81→// Metric represents a single metric data point to be written to the store.\n 82→type Metric struct {\n 83→\tName string\n 84→\tValue schema.Float\n 85→\t// MetricConfig contains frequency and aggregation settings for this metric.\n 86→\t// If Frequency is 0, configuration will be looked up from MemoryStore.Metrics during Write().\n 87→\tMetricConfig MetricConfig\n 88→}\n 89→\n 90→// MemoryStore is the main in-memory time-series metric storage implementation.\n 91→//\n 92→// It organizes metrics in a hierarchical tree structure where each level represents\n 93→// a component of the system hierarchy (e.g., cluster → host → CPU). Each level can\n 94→// store multiple metrics as time-series buffers.\n 95→//\n 96→// The store is initialized as a singleton via InitMetrics() and accessed via GetMemoryStore().\n 97→// All public methods are safe for concurrent use.\n 98→type MemoryStore struct {\n 99→\tMetrics map[string]MetricConfig\n 100→\troot Level\n 101→\tnodeProvider NodeProvider\n 102→}\n 103→\n 104→// Init initializes the metric store from configuration and starts background workers.\n 105→//\n 106→// This function must be called exactly once before any other metricstore operations.\n 107→// It performs the following initialization steps:\n 108→// 1. Validates and decodes the metric store configuration\n 109→// 2. Configures worker pool size (defaults to NumCPU/2+1, max 10)\n 110→// 3. Loads metric configurations from all registered clusters\n 111→// 4. Restores checkpoints within the retention window\n 112→// 5. Starts background workers for retention, checkpointing, archiving, and monitoring\n 113→// 6. Optionally subscribes to NATS for real-time metric ingestion\n 114→//\n 115→// Parameters:\n 116→// - rawConfig: JSON configuration for the metric store (see MetricStoreConfig); may be nil to use defaults\n 117→// - metrics: Map of metric names to their configurations (frequency and aggregation strategy)\n 118→// - wg: WaitGroup that will be incremented for each background goroutine started\n 119→//\n 120→// The function will call cclog.Fatal on critical errors during initialization.\n 121→// Use Shutdown() to cleanly stop all background workers started by Init().\n 122→//\n 123→// Note: Signal handling must be implemented by the caller. Call Shutdown() when\n 124→// receiving termination signals to ensure checkpoint data is persisted.\n 125→func Init(rawConfig json.RawMessage, metrics map[string]MetricConfig, wg *sync.WaitGroup) {\n 126→\tstartupTime := time.Now()\n 127→\n 128→\tif rawConfig != nil {\n 129→\t\tconfig.Validate(configSchema, rawConfig)\n 130→\t\tdec := json.NewDecoder(bytes.NewReader(rawConfig))\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"a981497f-8684-49b8-b4fa-ec725e2f2520","timestamp":"2026-04-01T13:30:43.981Z"},"type":"agent_progress","prompt":"","agentId":"a0faeb0075c8ce373"},"toolUseID":"agent_msg_01FAtCzB67VhBSqgeL4EpeA7","parentToolUseID":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","uuid":"dfe37931-d85d-4aaf-8ec7-36fcd2e179ce","timestamp":"2026-04-01T13:30:44.199Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"53a5ca6e-b2e0-4560-ab57-13ab647c2728","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01Bfa5bywLzrcDvsMyAtmfCr","type":"tool_result","content":[{"type":"text","text":"Perfect! Now let me compile my findings. Based on my examination of the cc-backend code, here's a comprehensive report:\n\n## CLI Flags Found in cc-backend\n\nAll flags are defined in `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/cli.go`:\n\n### Boolean Flags:\n- **`-init`** - Setup var directory, initialize sqlite database file, config.json and .env\n- **`-init-db`** - Go through job-archive and re-initialize the 'job', 'tag', and 'jobtag' tables (all running jobs will be lost!)\n- **`-sync-ldap`** - Sync the 'hpc_user' table with ldap\n- **`-server`** - Start a server, continues listening on port after initialization and argument handling\n- **`-gops`** - Listen via github.com/google/gops/agent (for debugging)\n- **`-dev`** - Enable development components: GraphQL Playground and Swagger UI\n- **`-version`** - Show version information and exit\n- **`-migrate-db`** - Migrate database to supported version and exit\n- **`-revert-db`** - Migrate database to previous version and exit\n- **`-apply-tags`** - Run taggers on all completed jobs and exit\n- **`-force-db`** - Force database version, clear dirty flag and exit\n- **`-optimize-db`** - Optimize database: run VACUUM to reclaim space, then ANALYZE to update query planner statistics\n- **`-cleanup-checkpoints`** - Clean up old checkpoint files (delete or archive) based on retention settings, then exit\n- **`-logdate`** - Set this flag to add date and time to log messages\n\n### String Flags:\n- **`-config`** (default: `./config.json`) - Specify alternative path to config.json\n- **`-add-user`** - Add a new user. Argument format: `<username>:[admin,support,manager,api,user]:<password>`\n- **`-del-user`** - Remove a existing user. Argument format: `<username>`\n- **`-jwt`** - Generate and print a JWT for the user specified by its username\n- **`-import-job`** - Import a job. Argument format: `<path-to-meta.json>:<path-to-data.json>,...`\n- **`-loglevel`** (default: `warn`) - Sets the logging level: `[debug, info, warn (default), err, crit]`\n\n## Environment Variables Checked at Startup\n\nFrom `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` and `/server.go`:\n\n1. **`GOGC`** (line 421, main.go)\n - Checked during server startup in `runServer()`\n - If not set, GC percent is configured to 15 (trigger GC when heap grows 15% above previous live set)\n - Used by Go's garbage collector\n\n2. **`JWT_PUBLIC_KEY`** (line 221, main.go)\n - Checked in `checkDefaultSecurityKeys()` \n - Warns if using the default public key: `\"REDACTED\"`\n - Warning: \"Using default JWT keys - not recommended for production environments\"\n\n3. **`DEBUG`** (line 100, server.go, referenced as `envDebug = \"DEBUG\"`)\n - Checked in GraphQL server initialization\n - If set to `\"1\"`, disables the recover function for panics in GraphQL handlers (allows stack traces to stderr)\n - If not set to `\"1\"`, enables the recover function to return GraphQL error responses instead\n\nAdditionally, the code loads a `.env` file at startup via `godotenv.Load()` (line 93, main.go), which can set environment variables from a configuration file.\n\n## metricstore.go Entry Points\n\nThe `Init()` function at line 125 of `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go`:\n- Takes `rawConfig json.RawMessage`, `metrics map[string]MetricConfig`, and `wg *sync.WaitGroup` as parameters\n- Does NOT directly read environment variables\n- Validates configuration from the JSON config file, not from env vars\n- Starts background workers for retention, checkpointing, archiving, and monitoring"},{"type":"text","text":"agentId: a0faeb0075c8ce373 (use SendMessage with to: 'a0faeb0075c8ce373' to continue this agent)\n<usage>total_tokens: 37973\ntool_uses: 10\nduration_ms: 170534</usage>"}]}]},"uuid":"1660d7df-e3be-4d95-b464-531f786d1810","timestamp":"2026-04-01T13:31:01.806Z","toolUseResult":{"status":"completed","prompt":"Look at /Users/jan/prg/ClusterCockpit/cc-backend/cmd/ — find the main entry point(s) and read any flag.* / flag.BoolVar / flag.StringVar / flag.IntVar calls. Also check if cc-backend exposes any CLI flags related to:\n- log level\n- log date/time\n- config file path\n- dev/debug mode\n- gops\n- version\n\nAlso read /Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go lines 1-130 to see if Init() reads any environment variables or has any other entry points beyond the rawConfig JSON.\n\nReturn all flag definitions found and any env vars checked at startup.","agentId":"a0faeb0075c8ce373","content":[{"type":"text","text":"Perfect! Now let me compile my findings. Based on my examination of the cc-backend code, here's a comprehensive report:\n\n## CLI Flags Found in cc-backend\n\nAll flags are defined in `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/cli.go`:\n\n### Boolean Flags:\n- **`-init`** - Setup var directory, initialize sqlite database file, config.json and .env\n- **`-init-db`** - Go through job-archive and re-initialize the 'job', 'tag', and 'jobtag' tables (all running jobs will be lost!)\n- **`-sync-ldap`** - Sync the 'hpc_user' table with ldap\n- **`-server`** - Start a server, continues listening on port after initialization and argument handling\n- **`-gops`** - Listen via github.com/google/gops/agent (for debugging)\n- **`-dev`** - Enable development components: GraphQL Playground and Swagger UI\n- **`-version`** - Show version information and exit\n- **`-migrate-db`** - Migrate database to supported version and exit\n- **`-revert-db`** - Migrate database to previous version and exit\n- **`-apply-tags`** - Run taggers on all completed jobs and exit\n- **`-force-db`** - Force database version, clear dirty flag and exit\n- **`-optimize-db`** - Optimize database: run VACUUM to reclaim space, then ANALYZE to update query planner statistics\n- **`-cleanup-checkpoints`** - Clean up old checkpoint files (delete or archive) based on retention settings, then exit\n- **`-logdate`** - Set this flag to add date and time to log messages\n\n### String Flags:\n- **`-config`** (default: `./config.json`) - Specify alternative path to config.json\n- **`-add-user`** - Add a new user. Argument format: `<username>:[admin,support,manager,api,user]:<password>`\n- **`-del-user`** - Remove a existing user. Argument format: `<username>`\n- **`-jwt`** - Generate and print a JWT for the user specified by its username\n- **`-import-job`** - Import a job. Argument format: `<path-to-meta.json>:<path-to-data.json>,...`\n- **`-loglevel`** (default: `warn`) - Sets the logging level: `[debug, info, warn (default), err, crit]`\n\n## Environment Variables Checked at Startup\n\nFrom `/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go` and `/server.go`:\n\n1. **`GOGC`** (line 421, main.go)\n - Checked during server startup in `runServer()`\n - If not set, GC percent is configured to 15 (trigger GC when heap grows 15% above previous live set)\n - Used by Go's garbage collector\n\n2. **`JWT_PUBLIC_KEY`** (line 221, main.go)\n - Checked in `checkDefaultSecurityKeys()` \n - Warns if using the default public key: `\"REDACTED\"`\n - Warning: \"Using default JWT keys - not recommended for production environments\"\n\n3. **`DEBUG`** (line 100, server.go, referenced as `envDebug = \"DEBUG\"`)\n - Checked in GraphQL server initialization\n - If set to `\"1\"`, disables the recover function for panics in GraphQL handlers (allows stack traces to stderr)\n - If not set to `\"1\"`, enables the recover function to return GraphQL error responses instead\n\nAdditionally, the code loads a `.env` file at startup via `godotenv.Load()` (line 93, main.go), which can set environment variables from a configuration file.\n\n## metricstore.go Entry Points\n\nThe `Init()` function at line 125 of `/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/metricstore.go`:\n- Takes `rawConfig json.RawMessage`, `metrics map[string]MetricConfig`, and `wg *sync.WaitGroup` as parameters\n- Does NOT directly read environment variables\n- Validates configuration from the JSON config file, not from env vars\n- Starts background workers for retention, checkpointing, archiving, and monitoring"}],"totalDurationMs":170534,"totalTokens":37973,"totalToolUseCount":10,"usage":{"input_tokens":5,"cache_creation_input_tokens":408,"cache_read_input_tokens":36464,"output_tokens":1096,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":408},"inference_geo":"","iterations":[],"speed":"standard"}},"sourceToolAssistantUUID":"53a5ca6e-b2e0-4560-ab57-13ab647c2728","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"30ff01d9-87f9-4f02-81c1-0f2eadd040a7","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01NmrYmVvAWzaouUH7Cq36eB","type":"tool_result","content":" 1→// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n 2→// All rights reserved. This file is part of cc-backend.\n 3→// Use of this source code is governed by a MIT-style\n 4→// license that can be found in the LICENSE file.\n 5→\n 6→// This file implements the cleanup (archiving or deletion) of old checkpoint files.\n 7→//\n 8→// The CleanUp worker runs on a timer equal to RetentionInMemory. In \"archive\" mode\n 9→// it converts checkpoint files older than the retention window into per-cluster\n 10→// Parquet files and then deletes the originals. In \"delete\" mode it simply removes\n 11→// old checkpoint files.\n 12→package metricstore\n 13→\n 14→import (\n 15→\t\"context\"\n 16→\t\"errors\"\n 17→\t\"fmt\"\n 18→\t\"os\"\n 19→\t\"path/filepath\"\n 20→\t\"strings\"\n 21→\t\"sync\"\n 22→\t\"sync/atomic\"\n 23→\t\"time\"\n 24→\n 25→\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n 26→)\n 27→\n 28→// CleanUp starts a background worker that periodically removes or archives\n 29→// checkpoint files older than the configured retention window.\n 30→//\n 31→// In \"archive\" mode, old checkpoint files are converted to Parquet and stored\n 32→// under Keys.Cleanup.RootDir. In \"delete\" mode they are simply removed.\n 33→// The cleanup interval equals Keys.RetentionInMemory.\n 34→func CleanUp(wg *sync.WaitGroup, ctx context.Context) {\n 35→\tif Keys.Cleanup.Mode == \"archive\" {\n 36→\t\tcclog.Info(\"[METRICSTORE]> enable archive cleanup to parquet\")\n 37→\t\t// Run as Archiver\n 38→\t\tcleanUpWorker(wg, ctx,\n 39→\t\t\tKeys.RetentionInMemory,\n 40→\t\t\t\"archiving\",\n 41→\t\t\tKeys.Cleanup.RootDir,\n 42→\t\t\tfalse,\n 43→\t\t)\n 44→\t} else {\n 45→\t\t// Run as Deleter\n 46→\t\tcleanUpWorker(wg, ctx,\n 47→\t\t\tKeys.RetentionInMemory,\n 48→\t\t\t\"deleting\",\n 49→\t\t\t\"\",\n 50→\t\t\ttrue,\n 51→\t\t)\n 52→\t}\n 53→}\n 54→\n 55→// cleanUpWorker takes simple values to configure what it does\n 56→func cleanUpWorker(wg *sync.WaitGroup, ctx context.Context, interval string, mode string, cleanupDir string, delete bool) {\n 57→\twg.Go(func() {\n 58→\t\td, err := time.ParseDuration(interval)\n 59→\t\tif err != nil {\n 60→\t\t\tcclog.Fatalf(\"[METRICSTORE]> error parsing %s interval duration: %v\\n\", mode, err)\n 61→\t\t}\n 62→\t\tif d <= 0 {\n 63→\t\t\treturn\n 64→\t\t}\n 65→\n 66→\t\tticker := time.NewTicker(d)\n 67→\t\tdefer ticker.Stop()\n 68→\n 69→\t\tfor {\n 70→\t\t\tselect {\n 71→\t\t\tcase <-ctx.Done():\n 72→\t\t\t\treturn\n 73→\t\t\tcase <-ticker.C:\n 74→\t\t\t\tt := time.Now().Add(-d)\n 75→\t\t\t\tcclog.Infof(\"[METRICSTORE]> start %s checkpoints (older than %s)...\", mode, t.Format(time.RFC3339))\n 76→\n 77→\t\t\t\tn, err := CleanupCheckpoints(Keys.Checkpoints.RootDir, cleanupDir, t.Unix(), delete)\n 78→\n 79→\t\t\t\tif err != nil {\n 80→\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> %s failed: %s\", mode, err.Error())\n 81→\t\t\t\t} else {\n 82→\t\t\t\t\tif delete {\n 83→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoints deleted\", n)\n 84→\t\t\t\t\t} else {\n 85→\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoint files archived to parquet\", n)\n 86→\t\t\t\t\t}\n 87→\t\t\t\t}\n 88→\t\t\t}\n 89→\t\t}\n 90→\t})\n 91→}\n 92→\n 93→var ErrNoNewArchiveData error = errors.New(\"all data already archived\")\n 94→\n 95→// CleanupCheckpoints deletes or archives all checkpoint files older than `from`.\n 96→// When archiving, consolidates all hosts per cluster into a single Parquet file.\n 97→func CleanupCheckpoints(checkpointsDir, cleanupDir string, from int64, deleteInstead bool) (int, error) {\n 98→\tif deleteInstead {\n 99→\t\treturn deleteCheckpoints(checkpointsDir, from)\n 100→\t}\n 101→\n 102→\treturn archiveCheckpoints(checkpointsDir, cleanupDir, from)\n 103→}\n 104→\n 105→// deleteCheckpoints removes checkpoint files older than `from` across all clusters/hosts.\n 106→func deleteCheckpoints(checkpointsDir string, from int64) (int, error) {\n 107→\tentries1, err := os.ReadDir(checkpointsDir)\n 108→\tif err != nil {\n 109→\t\treturn 0, err\n 110→\t}\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"a9a4b669-a4f6-4313-8b2f-9747cdede6b7","timestamp":"2026-04-01T13:31:21.953Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/pkg/metricstore/archive.go","content":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-backend.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\n// This file implements the cleanup (archiving or deletion) of old checkpoint files.\n//\n// The CleanUp worker runs on a timer equal to RetentionInMemory. In \"archive\" mode\n// it converts checkpoint files older than the retention window into per-cluster\n// Parquet files and then deletes the originals. In \"delete\" mode it simply removes\n// old checkpoint files.\npackage metricstore\n\nimport (\n\t\"context\"\n\t\"errors\"\n\t\"fmt\"\n\t\"os\"\n\t\"path/filepath\"\n\t\"strings\"\n\t\"sync\"\n\t\"sync/atomic\"\n\t\"time\"\n\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n)\n\n// CleanUp starts a background worker that periodically removes or archives\n// checkpoint files older than the configured retention window.\n//\n// In \"archive\" mode, old checkpoint files are converted to Parquet and stored\n// under Keys.Cleanup.RootDir. In \"delete\" mode they are simply removed.\n// The cleanup interval equals Keys.RetentionInMemory.\nfunc CleanUp(wg *sync.WaitGroup, ctx context.Context) {\n\tif Keys.Cleanup.Mode == \"archive\" {\n\t\tcclog.Info(\"[METRICSTORE]> enable archive cleanup to parquet\")\n\t\t// Run as Archiver\n\t\tcleanUpWorker(wg, ctx,\n\t\t\tKeys.RetentionInMemory,\n\t\t\t\"archiving\",\n\t\t\tKeys.Cleanup.RootDir,\n\t\t\tfalse,\n\t\t)\n\t} else {\n\t\t// Run as Deleter\n\t\tcleanUpWorker(wg, ctx,\n\t\t\tKeys.RetentionInMemory,\n\t\t\t\"deleting\",\n\t\t\t\"\",\n\t\t\ttrue,\n\t\t)\n\t}\n}\n\n// cleanUpWorker takes simple values to configure what it does\nfunc cleanUpWorker(wg *sync.WaitGroup, ctx context.Context, interval string, mode string, cleanupDir string, delete bool) {\n\twg.Go(func() {\n\t\td, err := time.ParseDuration(interval)\n\t\tif err != nil {\n\t\t\tcclog.Fatalf(\"[METRICSTORE]> error parsing %s interval duration: %v\\n\", mode, err)\n\t\t}\n\t\tif d <= 0 {\n\t\t\treturn\n\t\t}\n\n\t\tticker := time.NewTicker(d)\n\t\tdefer ticker.Stop()\n\n\t\tfor {\n\t\t\tselect {\n\t\t\tcase <-ctx.Done():\n\t\t\t\treturn\n\t\t\tcase <-ticker.C:\n\t\t\t\tt := time.Now().Add(-d)\n\t\t\t\tcclog.Infof(\"[METRICSTORE]> start %s checkpoints (older than %s)...\", mode, t.Format(time.RFC3339))\n\n\t\t\t\tn, err := CleanupCheckpoints(Keys.Checkpoints.RootDir, cleanupDir, t.Unix(), delete)\n\n\t\t\t\tif err != nil {\n\t\t\t\t\tcclog.Errorf(\"[METRICSTORE]> %s failed: %s\", mode, err.Error())\n\t\t\t\t} else {\n\t\t\t\t\tif delete {\n\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoints deleted\", n)\n\t\t\t\t\t} else {\n\t\t\t\t\t\tcclog.Infof(\"[METRICSTORE]> done: %d checkpoint files archived to parquet\", n)\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t})\n}\n\nvar ErrNoNewArchiveData error = errors.New(\"all data already archived\")\n\n// CleanupCheckpoints deletes or archives all checkpoint files older than `from`.\n// When archiving, consolidates all hosts per cluster into a single Parquet file.\nfunc CleanupCheckpoints(checkpointsDir, cleanupDir string, from int64, deleteInstead bool) (int, error) {\n\tif deleteInstead {\n\t\treturn deleteCheckpoints(checkpointsDir, from)\n\t}\n\n\treturn archiveCheckpoints(checkpointsDir, cleanupDir, from)\n}\n\n// deleteCheckpoints removes checkpoint files older than `from` across all clusters/hosts.\nfunc deleteCheckpoints(checkpointsDir string, from int64) (int, error) {\n\tentries1, err := os.ReadDir(checkpointsDir)\n\tif err != nil {\n\t\treturn 0, err\n\t}","numLines":110,"startLine":1,"totalLines":353}},"sourceToolAssistantUUID":"30ff01d9-87f9-4f02-81c1-0f2eadd040a7","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"a9a4b669-a4f6-4313-8b2f-9747cdede6b7","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01F8H14JDy33mJTB3PosXNak","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2983,"cache_read_input_tokens":74824,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":2983},"output_tokens":38,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8j893MBpixxEoT1VU4","type":"assistant","uuid":"00d815f1-7df8-4909-895c-c0af708e66d1","timestamp":"2026-04-01T13:31:32.788Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"00d815f1-7df8-4909-895c-c0af708e66d1","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01F8H14JDy33mJTB3PosXNak","type":"message","role":"assistant","content":[{"type":"text","text":"Let me quickly check how cc-backend implements the `-cleanup-checkpoints` flag."}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2983,"cache_read_input_tokens":74824,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":2983},"output_tokens":38,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8j893MBpixxEoT1VU4","type":"assistant","uuid":"9bcb447c-ebf2-433e-8beb-23efcecd959e","timestamp":"2026-04-01T13:31:33.231Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"9bcb447c-ebf2-433e-8beb-23efcecd959e","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01F8H14JDy33mJTB3PosXNak","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01KwgRSjyB3xuTi8oUG5FV75","name":"Grep","input":{"pattern":"cleanup-checkpoints|CleanupCheckpoints","path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd","output_mode":"content"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":2983,"cache_read_input_tokens":74824,"output_tokens":560,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":2983,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8j893MBpixxEoT1VU4","type":"assistant","uuid":"cc8c5ef9-e974-491f-baeb-3a970c116eab","timestamp":"2026-04-01T13:31:34.353Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"cc8c5ef9-e974-491f-baeb-3a970c116eab","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Grep","command":"callback"},"parentToolUseID":"toolu_01KwgRSjyB3xuTi8oUG5FV75","toolUseID":"toolu_01KwgRSjyB3xuTi8oUG5FV75","timestamp":"2026-04-01T13:31:34.376Z","uuid":"9e248924-c7f0-4c34-a48f-012ac8b2ebff","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"cc8c5ef9-e974-491f-baeb-3a970c116eab","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01KwgRSjyB3xuTi8oUG5FV75","type":"tool_result","content":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:541:\tif flagCleanupCheckpoints {\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:565:\t\tn, err := metricstore.CleanupCheckpoints(\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/cli.go:15:\tflagCleanupCheckpoints bool\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/cli.go:32:\tflag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")"}]},"uuid":"0589fb7d-c4d1-4c4b-8299-bbd4a1451c9c","timestamp":"2026-04-01T13:31:34.375Z","toolUseResult":{"mode":"content","numFiles":0,"filenames":[],"content":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:541:\tif flagCleanupCheckpoints {\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go:565:\t\tn, err := metricstore.CleanupCheckpoints(\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/cli.go:15:\tflagCleanupCheckpoints bool\n/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/cli.go:32:\tflag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")","numLines":4},"sourceToolAssistantUUID":"cc8c5ef9-e974-491f-baeb-3a970c116eab","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"0589fb7d-c4d1-4c4b-8299-bbd4a1451c9c","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01W5U96Jm2L7eXUZtpJjh4Rf","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_018emAqah4Br6UH11nj2DhM3","name":"Read","input":{"file_path":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","offset":535,"limit":45},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":877,"cache_read_input_tokens":77807,"output_tokens":113,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":877,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8k3Fsvs7ArZnF3WTVY","type":"assistant","uuid":"2db447e4-f59c-495c-a762-37113fe736a2","timestamp":"2026-04-01T13:31:37.136Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"2db447e4-f59c-495c-a762-37113fe736a2","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Read","command":"callback"},"parentToolUseID":"toolu_018emAqah4Br6UH11nj2DhM3","toolUseID":"toolu_018emAqah4Br6UH11nj2DhM3","timestamp":"2026-04-01T13:31:37.148Z","uuid":"a0fdb5bd-f23a-436e-8c21-ef65475a87a5","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"2db447e4-f59c-495c-a762-37113fe736a2","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_018emAqah4Br6UH11nj2DhM3","type":"tool_result","content":" 535→\t// Initialize subsystems (archive, metrics, taggers)\n 536→\tif err := initSubsystems(); err != nil {\n 537→\t\treturn err\n 538→\t}\n 539→\n 540→\t// Handle checkpoint cleanup\n 541→\tif flagCleanupCheckpoints {\n 542→\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n 543→\t\tif mscfg == nil {\n 544→\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n 545→\t\t}\n 546→\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n 547→\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n 548→\t\t}\n 549→\t\tif metricstore.Keys.NumWorkers <= 0 {\n 550→\t\t\tmetricstore.Keys.NumWorkers = min(goruntime.NumCPU()/2+1, metricstore.DefaultMaxWorkers)\n 551→\t\t}\n 552→\n 553→\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n 554→\t\tif err != nil {\n 555→\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n 556→\t\t}\n 557→\t\tfrom := time.Now().Add(-d)\n 558→\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n 559→\t\tcleanupDir := \"\"\n 560→\t\tif !deleteMode {\n 561→\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n 562→\t\t}\n 563→\n 564→\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n 565→\t\tn, err := metricstore.CleanupCheckpoints(\n 566→\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n 567→\t\tif err != nil {\n 568→\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n 569→\t\t}\n 570→\t\tif deleteMode {\n 571→\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files deleted.\", n)\n 572→\t\t} else {\n 573→\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n 574→\t\t}\n 575→\t}\n 576→\n 577→\t// Exit if start server is not requested\n 578→\tif !flagServer {\n 579→\t\tcclog.Exit(\"No errors, server flag not set. Exiting cc-backend.\")\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"6e2903f5-26cd-4dc2-8e42-e78a5330eca6","timestamp":"2026-04-01T13:31:37.148Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-backend/cmd/cc-backend/main.go","content":"\t// Initialize subsystems (archive, metrics, taggers)\n\tif err := initSubsystems(); err != nil {\n\t\treturn err\n\t}\n\n\t// Handle checkpoint cleanup\n\tif flagCleanupCheckpoints {\n\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n\t\tif mscfg == nil {\n\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n\t\t}\n\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n\t\t}\n\t\tif metricstore.Keys.NumWorkers <= 0 {\n\t\t\tmetricstore.Keys.NumWorkers = min(goruntime.NumCPU()/2+1, metricstore.DefaultMaxWorkers)\n\t\t}\n\n\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n\t\t}\n\t\tfrom := time.Now().Add(-d)\n\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n\t\tcleanupDir := \"\"\n\t\tif !deleteMode {\n\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n\t\t}\n\n\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n\t\tn, err := metricstore.CleanupCheckpoints(\n\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n\t\t}\n\t\tif deleteMode {\n\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files deleted.\", n)\n\t\t} else {\n\t\t\tcclog.Exitf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n\t\t}\n\t}\n\n\t// Exit if start server is not requested\n\tif !flagServer {\n\t\tcclog.Exit(\"No errors, server flag not set. Exiting cc-backend.\")","numLines":45,"startLine":535,"totalLines":595}},"sourceToolAssistantUUID":"2db447e4-f59c-495c-a762-37113fe736a2","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"6e2903f5-26cd-4dc2-8e42-e78a5330eca6","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01AGa1W6YbtDZHpBXyyyTD71","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"","signature":"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"}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":887,"cache_read_input_tokens":78684,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":887},"output_tokens":42,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8kFHBjNkupjaf81cV6","type":"assistant","uuid":"da1d5444-fb13-4968-93ee-deb7ff975f00","timestamp":"2026-04-01T13:31:54.010Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"da1d5444-fb13-4968-93ee-deb7ff975f00","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01AGa1W6YbtDZHpBXyyyTD71","type":"message","role":"assistant","content":[{"type":"text","text":"Now I have everything I need."}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":887,"cache_read_input_tokens":78684,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":887},"output_tokens":42,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8kFHBjNkupjaf81cV6","type":"assistant","uuid":"7ad2121d-da81-4340-8c30-9f1c7fdc2281","timestamp":"2026-04-01T13:31:54.010Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"7ad2121d-da81-4340-8c30-9f1c7fdc2281","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01AGa1W6YbtDZHpBXyyyTD71","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_0186DC5fNokkVhUcEaTd63nG","name":"Write","input":{"file_path":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md","content":"# Plan: Add missing `-cleanup-checkpoints` flag\n\n## Context\n\nComparing cc-metric-store's CLI flags against cc-backend's, the only applicable missing flag is\n`-cleanup-checkpoints`. All other cc-backend flags are database/user-management specific and\ndon't apply to cc-metric-store.\n\ncc-backend has this flag since it is useful for manual maintenance: run cleanup (delete or archive\nold checkpoints according to configured retention settings) and exit — without starting the full\nserver and loading all data into memory.\n\n## Current cc-metric-store flags (complete)\n\n| Flag | Present |\n|---|---|\n| `-config` | ✓ |\n| `-loglevel` | ✓ |\n| `-logdate` | ✓ |\n| `-dev` | ✓ |\n| `-gops` | ✓ |\n| `-version` | ✓ |\n| `-cleanup-checkpoints` | **missing** |\n\n## What `-cleanup-checkpoints` does (cc-backend reference: `cmd/cc-backend/main.go:541-575`)\n\n1. Reads `metric-store` config section and decodes it into `metricstore.Keys`\n2. Parses `RetentionInMemory` to determine the cutoff timestamp\n3. Calls `metricstore.CleanupCheckpoints(checkpointsDir, cleanupDir, from, deleteMode)`\n4. Logs result and exits\n\nCritically: does **not** call `metricstore.Init()` — avoids loading all checkpoint data into RAM.\n\n## Implementation\n\n### `cmd/cc-metric-store/main.go`\n\n1. Add flag variable: `flagCleanupCheckpoints bool`\n2. Register: `flag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")`\n3. In `run()`, after `config.Init(cfg)` and before starting NATS/server, handle the flag:\n\n```go\nif flagCleanupCheckpoints {\n mscfg := ccconf.GetPackageConfig(\"metric-store\")\n if mscfg == nil {\n return fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n }\n if err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n return fmt.Errorf(\"decoding metric-store config: %w\", err)\n }\n d, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n if err != nil {\n return fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n }\n from := time.Now().Add(-d)\n deleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n cleanupDir := \"\"\n if !deleteMode {\n cleanupDir = metricstore.Keys.Cleanup.RootDir\n }\n cclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n n, err := metricstore.CleanupCheckpoints(\n metricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n if err != nil {\n return fmt.Errorf(\"checkpoint cleanup: %w\", err)\n }\n if deleteMode {\n cclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)\n } else {\n cclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n }\n return nil\n}\n```\n\n4. Add `\"encoding/json\"` and `\"time\"` to imports (check if already present).\n\n### `README.md`\n\nAdd `-cleanup-checkpoints` to the Running section.\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n- `README.md`\n\n## Verification\n\n```bash\ngo build ./...\n./cc-metric-store -cleanup-checkpoints # should clean up and exit without starting server\n./cc-metric-store -cleanup-checkpoints -loglevel info # confirm log output\n```\n"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":887,"cache_read_input_tokens":78684,"output_tokens":1791,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":887,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8kFHBjNkupjaf81cV6","type":"assistant","uuid":"8511c6f0-c30d-46b0-9289-5b94908f6674","timestamp":"2026-04-01T13:32:08.849Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"8511c6f0-c30d-46b0-9289-5b94908f6674","isSidechain":false,"type":"progress","data":{"type":"hook_progress","hookEvent":"PostToolUse","hookName":"PostToolUse:Write","command":"callback"},"parentToolUseID":"toolu_0186DC5fNokkVhUcEaTd63nG","toolUseID":"toolu_0186DC5fNokkVhUcEaTd63nG","timestamp":"2026-04-01T13:32:08.863Z","uuid":"2de5bb7d-df06-4541-9739-aa7390a89c5c","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"8511c6f0-c30d-46b0-9289-5b94908f6674","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0186DC5fNokkVhUcEaTd63nG","type":"tool_result","content":"The file /Users/jan/.claude/plans/stateful-frolicking-jellyfish.md has been updated successfully."}]},"uuid":"56f49811-4c00-487d-a0c6-083aad25f7e6","timestamp":"2026-04-01T13:32:08.863Z","toolUseResult":{"type":"update","filePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md","content":"# Plan: Add missing `-cleanup-checkpoints` flag\n\n## Context\n\nComparing cc-metric-store's CLI flags against cc-backend's, the only applicable missing flag is\n`-cleanup-checkpoints`. All other cc-backend flags are database/user-management specific and\ndon't apply to cc-metric-store.\n\ncc-backend has this flag since it is useful for manual maintenance: run cleanup (delete or archive\nold checkpoints according to configured retention settings) and exit — without starting the full\nserver and loading all data into memory.\n\n## Current cc-metric-store flags (complete)\n\n| Flag | Present |\n|---|---|\n| `-config` | ✓ |\n| `-loglevel` | ✓ |\n| `-logdate` | ✓ |\n| `-dev` | ✓ |\n| `-gops` | ✓ |\n| `-version` | ✓ |\n| `-cleanup-checkpoints` | **missing** |\n\n## What `-cleanup-checkpoints` does (cc-backend reference: `cmd/cc-backend/main.go:541-575`)\n\n1. Reads `metric-store` config section and decodes it into `metricstore.Keys`\n2. Parses `RetentionInMemory` to determine the cutoff timestamp\n3. Calls `metricstore.CleanupCheckpoints(checkpointsDir, cleanupDir, from, deleteMode)`\n4. Logs result and exits\n\nCritically: does **not** call `metricstore.Init()` — avoids loading all checkpoint data into RAM.\n\n## Implementation\n\n### `cmd/cc-metric-store/main.go`\n\n1. Add flag variable: `flagCleanupCheckpoints bool`\n2. Register: `flag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")`\n3. In `run()`, after `config.Init(cfg)` and before starting NATS/server, handle the flag:\n\n```go\nif flagCleanupCheckpoints {\n mscfg := ccconf.GetPackageConfig(\"metric-store\")\n if mscfg == nil {\n return fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n }\n if err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n return fmt.Errorf(\"decoding metric-store config: %w\", err)\n }\n d, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n if err != nil {\n return fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n }\n from := time.Now().Add(-d)\n deleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n cleanupDir := \"\"\n if !deleteMode {\n cleanupDir = metricstore.Keys.Cleanup.RootDir\n }\n cclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n n, err := metricstore.CleanupCheckpoints(\n metricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n if err != nil {\n return fmt.Errorf(\"checkpoint cleanup: %w\", err)\n }\n if deleteMode {\n cclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)\n } else {\n cclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n }\n return nil\n}\n```\n\n4. Add `\"encoding/json\"` and `\"time\"` to imports (check if already present).\n\n### `README.md`\n\nAdd `-cleanup-checkpoints` to the Running section.\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n- `README.md`\n\n## Verification\n\n```bash\ngo build ./...\n./cc-metric-store -cleanup-checkpoints # should clean up and exit without starting server\n./cc-metric-store -cleanup-checkpoints -loglevel info # confirm log output\n```\n","structuredPatch":[{"oldStart":1,"oldLines":69,"newStart":1,"newLines":93,"lines":["-# Plan: Fix startup/shutdown sequence vs metricstore","+# Plan: Add missing `-cleanup-checkpoints` flag"," "," ## Context"," ","-After comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s","-`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.","-The shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown()).","+Comparing cc-metric-store's CLI flags against cc-backend's, the only applicable missing flag is","+`-cleanup-checkpoints`. All other cc-backend flags are database/user-management specific and","+don't apply to cc-metric-store."," ","-## Bugs found","+cc-backend has this flag since it is useful for manual maintenance: run cleanup (delete or archive","+old checkpoints according to configured retention settings) and exit — without starting the full","+server and loading all data into memory."," ","-### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)","+## Current cc-metric-store flags (complete)"," ","-**Code (lines 141-145):**","-```go","-if flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded","- agent.Listen(...)","-}","+| Flag | Present |","+|---|---|","+| `-config` | ✓ |","+| `-loglevel` | ✓ |","+| `-logdate` | ✓ |","+| `-dev` | ✓ |","+| `-gops` | ✓ |","+| `-version` | ✓ |","+| `-cleanup-checkpoints` | **missing** |"," ","-ccconf.Init(flagConfigFile) // line 147","-config.Init(cfg) // line 154 — only here is config.Keys populated","-```","+## What `-cleanup-checkpoints` does (cc-backend reference: `cmd/cc-backend/main.go:541-575`)"," ","-`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because","-`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in","-`config.json` silently has no effect.","+1. Reads `metric-store` config section and decodes it into `metricstore.Keys`","+2. Parses `RetentionInMemory` to determine the cutoff timestamp","+3. Calls `metricstore.CleanupCheckpoints(checkpointsDir, cleanupDir, from, deleteMode)`","+4. Logs result and exits"," ","-**Fix:** Move the gops block to after `config.Init(cfg)`.","+Critically: does **not** call `metricstore.Init()` — avoids loading all checkpoint data into RAM."," ","-### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)","+## Implementation"," ","-**Code (lines 63-68):**","-```go","-metricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers","+### `cmd/cc-metric-store/main.go`"," ","-if os.Getenv(envGOGC) == \"\" {","- debug.SetGCPercent(15)","+1. Add flag variable: `flagCleanupCheckpoints bool`","+2. Register: `flag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")`","+3. In `run()`, after `config.Init(cfg)` and before starting NATS/server, handle the flag:","+","+```go","+if flagCleanupCheckpoints {","+ mscfg := ccconf.GetPackageConfig(\"metric-store\")","+ if mscfg == nil {","+ return fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")","+ }","+ if err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {","+ return fmt.Errorf(\"decoding metric-store config: %w\", err)","+ }","+ d, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)","+ if err != nil {","+ return fmt.Errorf(\"parsing retention-in-memory: %w\", err)","+ }","+ from := time.Now().Add(-d)","+ deleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"","+ cleanupDir := \"\"","+ if !deleteMode {","+ cleanupDir = metricstore.Keys.Cleanup.RootDir","+ }","+ cclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))","+ n, err := metricstore.CleanupCheckpoints(","+ metricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)","+ if err != nil {","+ return fmt.Errorf(\"checkpoint cleanup: %w\", err)","+ }","+ if deleteMode {","+ cclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)","+ } else {","+ cclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)","+ }","+ return nil"," }"," ```"," ","-The GC target is set to 15% *after* checkpoint loading, which is the largest allocation","-event at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call","-(line 169) that was intended to establish a good GC baseline after loading — that only","-works well if the GC percent is already low at that point.","+4. Add `\"encoding/json\"` and `\"time\"` to imports (check if already present)."," ","-**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`.","+### `README.md`"," ","-## Shutdown sequence — confirmed correct","+Add `-cleanup-checkpoints` to the Running section."," ","-The order in `server.go Shutdown()` is:","-1. Close NATS client → stops new inbound metric data","-2. `s.server.Shutdown()` → drains in-flight HTTP requests","-3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint","-","-This matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).","-"," ## Files to change"," "," - `cmd/cc-metric-store/main.go`","- - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)","- - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`","+- `README.md`"," "," ## Verification"," "," ```bash"," go build ./...","-go test -v ./...","+./cc-metric-store -cleanup-checkpoints # should clean up and exit without starting server","+./cc-metric-store -cleanup-checkpoints -loglevel info # confirm log output"," ```","-","-Manually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts."]}],"originalFile":"# Plan: Fix startup/shutdown sequence vs metricstore\n\n## Context\n\nAfter comparing cc-metric-store's `main.go`/`server.go` against what `cc-backend/pkg/metricstore`'s\n`Init()` and `Shutdown()` actually expect, two real bugs were found in the startup order.\nThe shutdown sequence itself is correct (NATS → HTTP → metricstore.Shutdown()).\n\n## Bugs found\n\n### Bug 1 — `EnableGops` config key is never effective (`cmd/cc-metric-store/main.go`)\n\n**Code (lines 141-145):**\n```go\nif flagGops || config.Keys.Debug.EnableGops { // ← checked BEFORE config loaded\n agent.Listen(...)\n}\n\nccconf.Init(flagConfigFile) // line 147\nconfig.Init(cfg) // line 154 — only here is config.Keys populated\n```\n\n`config.Keys.Debug.EnableGops` is always `false` (zero value) at line 141 because\n`config.Init()` hasn't been called yet. The `\"debug\": { \"gops\": true }` option in\n`config.json` silently has no effect.\n\n**Fix:** Move the gops block to after `config.Init(cfg)`.\n\n### Bug 2 — GOGC set after metricstore.Init() (`cmd/cc-metric-store/main.go`, `runServer()`)\n\n**Code (lines 63-68):**\n```go\nmetricstore.Init(mscfg, config.GetMetrics(), &wg) // loads checkpoints, starts workers\n\nif os.Getenv(envGOGC) == \"\" {\n debug.SetGCPercent(15)\n}\n```\n\nThe GC target is set to 15% *after* checkpoint loading, which is the largest allocation\nevent at startup. The metricstore's own Init() has a commented-out `runtime.GC()` call\n(line 169) that was intended to establish a good GC baseline after loading — that only\nworks well if the GC percent is already low at that point.\n\n**Fix:** Move `debug.SetGCPercent(15)` to before `metricstore.Init()` in `runServer()`.\n\n## Shutdown sequence — confirmed correct\n\nThe order in `server.go Shutdown()` is:\n1. Close NATS client → stops new inbound metric data\n2. `s.server.Shutdown()` → drains in-flight HTTP requests\n3. `metricstore.Shutdown()` → cancels workers, drains WAL staging, writes final checkpoint\n\nThis matches what `metricstore.Shutdown()` requires (no open write paths when checkpoint is written).\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n - Move gops block (lines 141-145) to after `config.Init(cfg)` (currently line 154)\n - Move `debug.SetGCPercent(15)` block to before `metricstore.Init()` in `runServer()`\n\n## Verification\n\n```bash\ngo build ./...\ngo test -v ./...\n```\n\nManually: run with `\"debug\": { \"gops\": true }` in config.json and confirm gops agent starts.\n"},"sourceToolAssistantUUID":"8511c6f0-c30d-46b0-9289-5b94908f6674","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"56f49811-4c00-487d-a0c6-083aad25f7e6","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01Jtp3UqHs5Ea2d4rKjTLJBA","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01KACStGX4PkUZvSN3Zyyhyu","name":"ExitPlanMode","input":{"plan":"# Plan: Add missing `-cleanup-checkpoints` flag\n\n## Context\n\nComparing cc-metric-store's CLI flags against cc-backend's, the only applicable missing flag is\n`-cleanup-checkpoints`. All other cc-backend flags are database/user-management specific and\ndon't apply to cc-metric-store.\n\ncc-backend has this flag since it is useful for manual maintenance: run cleanup (delete or archive\nold checkpoints according to configured retention settings) and exit — without starting the full\nserver and loading all data into memory.\n\n## Current cc-metric-store flags (complete)\n\n| Flag | Present |\n|---|---|\n| `-config` | ✓ |\n| `-loglevel` | ✓ |\n| `-logdate` | ✓ |\n| `-dev` | ✓ |\n| `-gops` | ✓ |\n| `-version` | ✓ |\n| `-cleanup-checkpoints` | **missing** |\n\n## What `-cleanup-checkpoints` does (cc-backend reference: `cmd/cc-backend/main.go:541-575`)\n\n1. Reads `metric-store` config section and decodes it into `metricstore.Keys`\n2. Parses `RetentionInMemory` to determine the cutoff timestamp\n3. Calls `metricstore.CleanupCheckpoints(checkpointsDir, cleanupDir, from, deleteMode)`\n4. Logs result and exits\n\nCritically: does **not** call `metricstore.Init()` — avoids loading all checkpoint data into RAM.\n\n## Implementation\n\n### `cmd/cc-metric-store/main.go`\n\n1. Add flag variable: `flagCleanupCheckpoints bool`\n2. Register: `flag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")`\n3. In `run()`, after `config.Init(cfg)` and before starting NATS/server, handle the flag:\n\n```go\nif flagCleanupCheckpoints {\n mscfg := ccconf.GetPackageConfig(\"metric-store\")\n if mscfg == nil {\n return fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n }\n if err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n return fmt.Errorf(\"decoding metric-store config: %w\", err)\n }\n d, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n if err != nil {\n return fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n }\n from := time.Now().Add(-d)\n deleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n cleanupDir := \"\"\n if !deleteMode {\n cleanupDir = metricstore.Keys.Cleanup.RootDir\n }\n cclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n n, err := metricstore.CleanupCheckpoints(\n metricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n if err != nil {\n return fmt.Errorf(\"checkpoint cleanup: %w\", err)\n }\n if deleteMode {\n cclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)\n } else {\n cclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n }\n return nil\n}\n```\n\n4. Add `\"encoding/json\"` and `\"time\"` to imports (check if already present).\n\n### `README.md`\n\nAdd `-cleanup-checkpoints` to the Running section.\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n- `README.md`\n\n## Verification\n\n```bash\ngo build ./...\n./cc-metric-store -cleanup-checkpoints # should clean up and exit without starting server\n./cc-metric-store -cleanup-checkpoints -loglevel info # confirm log output\n```\n","planFilePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":1927,"cache_read_input_tokens":79571,"output_tokens":38,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":1927,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8nasiSaUSJ7UvW3gjV","type":"assistant","uuid":"4b80c8ff-4a98-45e6-a341-b070d1fd4ce5","timestamp":"2026-04-01T13:32:13.793Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"4b80c8ff-4a98-45e6-a341-b070d1fd4ce5","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"User has approved your plan. You can now start coding. Start with updating your todo list if applicable\n\nYour plan has been saved to: /Users/jan/.claude/plans/stateful-frolicking-jellyfish.md\nYou can refer back to it if needed during implementation.\n\n## Approved Plan:\n# Plan: Add missing `-cleanup-checkpoints` flag\n\n## Context\n\nComparing cc-metric-store's CLI flags against cc-backend's, the only applicable missing flag is\n`-cleanup-checkpoints`. All other cc-backend flags are database/user-management specific and\ndon't apply to cc-metric-store.\n\ncc-backend has this flag since it is useful for manual maintenance: run cleanup (delete or archive\nold checkpoints according to configured retention settings) and exit — without starting the full\nserver and loading all data into memory.\n\n## Current cc-metric-store flags (complete)\n\n| Flag | Present |\n|---|---|\n| `-config` | ✓ |\n| `-loglevel` | ✓ |\n| `-logdate` | ✓ |\n| `-dev` | ✓ |\n| `-gops` | ✓ |\n| `-version` | ✓ |\n| `-cleanup-checkpoints` | **missing** |\n\n## What `-cleanup-checkpoints` does (cc-backend reference: `cmd/cc-backend/main.go:541-575`)\n\n1. Reads `metric-store` config section and decodes it into `metricstore.Keys`\n2. Parses `RetentionInMemory` to determine the cutoff timestamp\n3. Calls `metricstore.CleanupCheckpoints(checkpointsDir, cleanupDir, from, deleteMode)`\n4. Logs result and exits\n\nCritically: does **not** call `metricstore.Init()` — avoids loading all checkpoint data into RAM.\n\n## Implementation\n\n### `cmd/cc-metric-store/main.go`\n\n1. Add flag variable: `flagCleanupCheckpoints bool`\n2. Register: `flag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")`\n3. In `run()`, after `config.Init(cfg)` and before starting NATS/server, handle the flag:\n\n```go\nif flagCleanupCheckpoints {\n mscfg := ccconf.GetPackageConfig(\"metric-store\")\n if mscfg == nil {\n return fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n }\n if err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n return fmt.Errorf(\"decoding metric-store config: %w\", err)\n }\n d, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n if err != nil {\n return fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n }\n from := time.Now().Add(-d)\n deleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n cleanupDir := \"\"\n if !deleteMode {\n cleanupDir = metricstore.Keys.Cleanup.RootDir\n }\n cclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n n, err := metricstore.CleanupCheckpoints(\n metricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n if err != nil {\n return fmt.Errorf(\"checkpoint cleanup: %w\", err)\n }\n if deleteMode {\n cclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)\n } else {\n cclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n }\n return nil\n}\n```\n\n4. Add `\"encoding/json\"` and `\"time\"` to imports (check if already present).\n\n### `README.md`\n\nAdd `-cleanup-checkpoints` to the Running section.\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n- `README.md`\n\n## Verification\n\n```bash\ngo build ./...\n./cc-metric-store -cleanup-checkpoints # should clean up and exit without starting server\n./cc-metric-store -cleanup-checkpoints -loglevel info # confirm log output\n```\n","tool_use_id":"toolu_01KACStGX4PkUZvSN3Zyyhyu"}]},"uuid":"aa5b5b60-4ae2-485e-b670-2ee477829570","timestamp":"2026-04-01T13:32:31.728Z","toolUseResult":{"plan":"# Plan: Add missing `-cleanup-checkpoints` flag\n\n## Context\n\nComparing cc-metric-store's CLI flags against cc-backend's, the only applicable missing flag is\n`-cleanup-checkpoints`. All other cc-backend flags are database/user-management specific and\ndon't apply to cc-metric-store.\n\ncc-backend has this flag since it is useful for manual maintenance: run cleanup (delete or archive\nold checkpoints according to configured retention settings) and exit — without starting the full\nserver and loading all data into memory.\n\n## Current cc-metric-store flags (complete)\n\n| Flag | Present |\n|---|---|\n| `-config` | ✓ |\n| `-loglevel` | ✓ |\n| `-logdate` | ✓ |\n| `-dev` | ✓ |\n| `-gops` | ✓ |\n| `-version` | ✓ |\n| `-cleanup-checkpoints` | **missing** |\n\n## What `-cleanup-checkpoints` does (cc-backend reference: `cmd/cc-backend/main.go:541-575`)\n\n1. Reads `metric-store` config section and decodes it into `metricstore.Keys`\n2. Parses `RetentionInMemory` to determine the cutoff timestamp\n3. Calls `metricstore.CleanupCheckpoints(checkpointsDir, cleanupDir, from, deleteMode)`\n4. Logs result and exits\n\nCritically: does **not** call `metricstore.Init()` — avoids loading all checkpoint data into RAM.\n\n## Implementation\n\n### `cmd/cc-metric-store/main.go`\n\n1. Add flag variable: `flagCleanupCheckpoints bool`\n2. Register: `flag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")`\n3. In `run()`, after `config.Init(cfg)` and before starting NATS/server, handle the flag:\n\n```go\nif flagCleanupCheckpoints {\n mscfg := ccconf.GetPackageConfig(\"metric-store\")\n if mscfg == nil {\n return fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n }\n if err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n return fmt.Errorf(\"decoding metric-store config: %w\", err)\n }\n d, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n if err != nil {\n return fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n }\n from := time.Now().Add(-d)\n deleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n cleanupDir := \"\"\n if !deleteMode {\n cleanupDir = metricstore.Keys.Cleanup.RootDir\n }\n cclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n n, err := metricstore.CleanupCheckpoints(\n metricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n if err != nil {\n return fmt.Errorf(\"checkpoint cleanup: %w\", err)\n }\n if deleteMode {\n cclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)\n } else {\n cclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n }\n return nil\n}\n```\n\n4. Add `\"encoding/json\"` and `\"time\"` to imports (check if already present).\n\n### `README.md`\n\nAdd `-cleanup-checkpoints` to the Running section.\n\n## Files to change\n\n- `cmd/cc-metric-store/main.go`\n- `README.md`\n\n## Verification\n\n```bash\ngo build ./...\n./cc-metric-store -cleanup-checkpoints # should clean up and exit without starting server\n./cc-metric-store -cleanup-checkpoints -loglevel info # confirm log output\n```\n","isAgent":false,"filePath":"/Users/jan/.claude/plans/stateful-frolicking-jellyfish.md"},"sourceToolAssistantUUID":"4b80c8ff-4a98-45e6-a341-b070d1fd4ce5","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\t// Set GC percent before loading checkpoints so the GC baseline is established\n\t// with a low target from the start of the largest allocation event.\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","structuredPatch":[{"oldStart":7,"oldLines":6,"newStart":7,"newLines":7,"lines":[" "," import ("," \"context\"","+ \"encoding/json\""," \"flag\""," \"fmt\""," \"os\""]},{"oldStart":14,"oldLines":6,"newStart":15,"newLines":7,"lines":[" \"runtime/debug\""," \"sync\""," \"syscall\"","+ \"time\""," "," \"github.com/ClusterCockpit/cc-backend/pkg/metricstore\""," ccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\""]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"f1c48695-4a0b-45d4-a05e-4be1c8f239d0","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"encoding/json\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\t// Set GC percent before loading checkpoints so the GC baseline is established\n\t// with a low target from the start of the largest allocation event.\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","structuredPatch":[{"oldStart":38,"oldLines":8,"newStart":38,"newLines":8,"lines":[" )"," "," var (","- flagGops, flagVersion, flagDev, flagLogDateTime bool","- flagConfigFile, flagLogLevel string","+ flagGops, flagVersion, flagDev, flagLogDateTime, flagCleanupCheckpoints bool","+ flagConfigFile, flagLogLevel string"," )"," "," func printVersion() {"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"fcfcd594-d719-4008-8db3-1b75bdeb1174","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"68eb371c-0807-47e1-bf88-be9fa23bd035","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_017XtH1fP715RhhxQNbPa66Q","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go has been updated successfully."}]},"uuid":"f9b3c031-34b0-4c67-9f0f-386010e69935","timestamp":"2026-04-01T13:32:47.946Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go","oldString":"\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()","newString":"\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()","originalFile":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"encoding/json\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime, flagCleanupCheckpoints bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\t// Set GC percent before loading checkpoints so the GC baseline is established\n\t// with a low target from the start of the largest allocation event.\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","structuredPatch":[{"oldStart":130,"oldLines":6,"newStart":130,"newLines":7,"lines":[" flag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")"," flag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")"," flag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")","+ flag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")"," flag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")"," flag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")"," flag.Parse()"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"68eb371c-0807-47e1-bf88-be9fa23bd035","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"f9b3c031-34b0-4c67-9f0f-386010e69935","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01XjQ2SvrAJGvhgUZaG5VydC","type":"message","role":"assistant","content":[{"type":"text","text":"Now add the handler block after `config.Init(cfg)` and before the NATS init:"}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":615,"cache_read_input_tokens":83356,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":615},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8qTzZ7TX3ogGG5AXKm","type":"assistant","uuid":"f5beaece-00cc-48bf-948a-10d39fbd0a59","timestamp":"2026-04-01T13:32:51.128Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"f5beaece-00cc-48bf-948a-10d39fbd0a59","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01XjQ2SvrAJGvhgUZaG5VydC","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_016indUBFpxhWLBX77kcHDGi","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go","old_string":"\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")","new_string":"\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tif flagCleanupCheckpoints {\n\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n\t\tif mscfg == nil {\n\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n\t\t}\n\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n\t\t}\n\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n\t\t}\n\t\tfrom := time.Now().Add(-d)\n\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n\t\tcleanupDir := \"\"\n\t\tif !deleteMode {\n\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n\t\t}\n\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n\t\tn, err := metricstore.CleanupCheckpoints(\n\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n\t\t}\n\t\tif deleteMode {\n\t\t\tcclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)\n\t\t} else {\n\t\t\tcclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n\t\t}\n\t\treturn nil\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":615,"cache_read_input_tokens":83356,"output_tokens":720,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":615,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8qTzZ7TX3ogGG5AXKm","type":"assistant","uuid":"a7832854-e43d-4c37-88a7-4f0eee94dbe7","timestamp":"2026-04-01T13:32:58.740Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"a7832854-e43d-4c37-88a7-4f0eee94dbe7","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_016indUBFpxhWLBX77kcHDGi","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go has been updated successfully."}]},"uuid":"7b4b4ebc-998d-46a8-a69a-ef21849cb85d","timestamp":"2026-04-01T13:32:58.750Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/cmd/cc-metric-store/main.go","oldString":"\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")","newString":"\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tif flagCleanupCheckpoints {\n\t\tmscfg := ccconf.GetPackageConfig(\"metric-store\")\n\t\tif mscfg == nil {\n\t\t\treturn fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")\n\t\t}\n\t\tif err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {\n\t\t\treturn fmt.Errorf(\"decoding metric-store config: %w\", err)\n\t\t}\n\t\td, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"parsing retention-in-memory: %w\", err)\n\t\t}\n\t\tfrom := time.Now().Add(-d)\n\t\tdeleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"\n\t\tcleanupDir := \"\"\n\t\tif !deleteMode {\n\t\t\tcleanupDir = metricstore.Keys.Cleanup.RootDir\n\t\t}\n\t\tcclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))\n\t\tn, err := metricstore.CleanupCheckpoints(\n\t\t\tmetricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)\n\t\tif err != nil {\n\t\t\treturn fmt.Errorf(\"checkpoint cleanup: %w\", err)\n\t\t}\n\t\tif deleteMode {\n\t\t\tcclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)\n\t\t} else {\n\t\t\tcclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)\n\t\t}\n\t\treturn nil\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")","originalFile":"// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.\n// All rights reserved. This file is part of cc-metric-store.\n// Use of this source code is governed by a MIT-style\n// license that can be found in the LICENSE file.\n\npackage main\n\nimport (\n\t\"context\"\n\t\"encoding/json\"\n\t\"flag\"\n\t\"fmt\"\n\t\"os\"\n\t\"os/signal\"\n\t\"runtime/debug\"\n\t\"sync\"\n\t\"syscall\"\n\t\"time\"\n\n\t\"github.com/ClusterCockpit/cc-backend/pkg/metricstore\"\n\tccconf \"github.com/ClusterCockpit/cc-lib/v2/ccConfig\"\n\tcclog \"github.com/ClusterCockpit/cc-lib/v2/ccLogger\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/nats\"\n\t\"github.com/ClusterCockpit/cc-lib/v2/runtime\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/api\"\n\t\"github.com/ClusterCockpit/cc-metric-store/internal/config\"\n\t\"github.com/google/gops/agent\"\n)\n\nconst (\n\tenvGOGC = \"GOGC\"\n)\n\nvar (\n\tdate string\n\tcommit string\n\tversion string\n)\n\nvar (\n\tflagGops, flagVersion, flagDev, flagLogDateTime, flagCleanupCheckpoints bool\n\tflagConfigFile, flagLogLevel string\n)\n\nfunc printVersion() {\n\tfmt.Printf(\"Version:\\t%s\\n\", version)\n\tfmt.Printf(\"Git hash:\\t%s\\n\", commit)\n\tfmt.Printf(\"Build time:\\t%s\\n\", date)\n}\n\nfunc runServer(ctx context.Context) error {\n\tvar wg sync.WaitGroup\n\n\tmscfg := ccconf.GetPackageConfig(\"metrics\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metrics configuration\")\n\t}\n\tconfig.InitMetrics(mscfg)\n\n\tmscfg = ccconf.GetPackageConfig(\"metric-store\")\n\tif mscfg == nil {\n\t\treturn fmt.Errorf(\"missing metricstore configuration\")\n\t}\n\n\t// Set GC percent before loading checkpoints so the GC baseline is established\n\t// with a low target from the start of the largest allocation event.\n\tif os.Getenv(envGOGC) == \"\" {\n\t\tdebug.SetGCPercent(15)\n\t}\n\n\tmetricstore.Init(mscfg, config.GetMetrics(), &wg)\n\n\tif config.Keys.BackendURL != \"\" {\n\t\tms := metricstore.GetMemoryStore()\n\t\tms.SetNodeProvider(api.NewBackendNodeProvider(config.Keys.BackendURL))\n\t\tcclog.Infof(\"Node provider configured with backend URL: %s\", config.Keys.BackendURL)\n\t}\n\n\t// Initialize HTTP server\n\tsrv, err := NewServer(version, commit, date)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"creating server: %w\", err)\n\t}\n\n\t// Channel to collect errors from server\n\terrChan := make(chan error, 1)\n\n\t// Start HTTP server\n\twg.Go(func() {\n\t\tif err := srv.Start(ctx); err != nil {\n\t\t\terrChan <- err\n\t\t}\n\t})\n\n\t// Handle shutdown signals\n\twg.Add(1)\n\tsigs := make(chan os.Signal, 1)\n\tsignal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)\n\tgo func() {\n\t\tdefer wg.Done()\n\t\tselect {\n\t\tcase <-sigs:\n\t\t\tcclog.Info(\"Shutdown signal received\")\n\t\tcase <-ctx.Done():\n\t\t}\n\n\t\truntime.SystemdNotify(false, \"Shutting down ...\")\n\t\tsrv.Shutdown(ctx)\n\t}()\n\n\truntime.SystemdNotify(true, \"running\")\n\n\t// Wait for completion or errors\n\tgo func() {\n\t\twg.Wait()\n\t\tclose(errChan)\n\t}()\n\n\t// Wait for either server startup error or shutdown completion\n\tif err := <-errChan; err != nil {\n\t\treturn err\n\t}\n\n\tcclog.Print(\"Graceful shutdown completed!\")\n\treturn nil\n}\n\nfunc run() error {\n\tflag.BoolVar(&flagGops, \"gops\", false, \"Listen via github.com/google/gops/agent (for debugging)\")\n\tflag.BoolVar(&flagDev, \"dev\", false, \"Enable development component: Swagger UI\")\n\tflag.BoolVar(&flagVersion, \"version\", false, \"Show version information and exit\")\n\tflag.BoolVar(&flagLogDateTime, \"logdate\", false, \"Set this flag to add date and time to log messages\")\n\tflag.BoolVar(&flagCleanupCheckpoints, \"cleanup-checkpoints\", false, \"Clean up old checkpoint files (delete or archive) based on retention settings, then exit\")\n\tflag.StringVar(&flagConfigFile, \"config\", \"./config.json\", \"Specify alternative path to `config.json`\")\n\tflag.StringVar(&flagLogLevel, \"loglevel\", \"warn\", \"Sets the logging level: `[debug, info, warn (default), err, crit]`\")\n\tflag.Parse()\n\n\tif flagVersion {\n\t\tprintVersion()\n\t\treturn nil\n\t}\n\n\tcclog.Init(flagLogLevel, flagLogDateTime)\n\n\tccconf.Init(flagConfigFile)\n\n\tcfg := ccconf.GetPackageConfig(\"main\")\n\tif cfg == nil {\n\t\treturn fmt.Errorf(\"main configuration must be present\")\n\t}\n\n\tconfig.Init(cfg)\n\n\tif flagGops || config.Keys.Debug.EnableGops {\n\t\tif err := agent.Listen(agent.Options{}); err != nil {\n\t\t\treturn fmt.Errorf(\"starting gops agent: %w\", err)\n\t\t}\n\t}\n\n\tnatsConfig := ccconf.GetPackageConfig(\"nats\")\n\tif err := nats.Init(natsConfig); err != nil {\n\t\tcclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())\n\t}\n\tnats.Connect()\n\n\tctx, cancel := context.WithCancel(context.Background())\n\tdefer cancel()\n\n\treturn runServer(ctx)\n}\n\nfunc main() {\n\tif err := run(); err != nil {\n\t\tcclog.Error(err.Error())\n\t\tos.Exit(1)\n\t}\n}\n","structuredPatch":[{"oldStart":157,"oldLines":6,"newStart":157,"newLines":38,"lines":[" }"," }"," ","+ if flagCleanupCheckpoints {","+ mscfg := ccconf.GetPackageConfig(\"metric-store\")","+ if mscfg == nil {","+ return fmt.Errorf(\"metric-store configuration required for checkpoint cleanup\")","+ }","+ if err := json.Unmarshal(mscfg, &metricstore.Keys); err != nil {","+ return fmt.Errorf(\"decoding metric-store config: %w\", err)","+ }","+ d, err := time.ParseDuration(metricstore.Keys.RetentionInMemory)","+ if err != nil {","+ return fmt.Errorf(\"parsing retention-in-memory: %w\", err)","+ }","+ from := time.Now().Add(-d)","+ deleteMode := metricstore.Keys.Cleanup == nil || metricstore.Keys.Cleanup.Mode != \"archive\"","+ cleanupDir := \"\"","+ if !deleteMode {","+ cleanupDir = metricstore.Keys.Cleanup.RootDir","+ }","+ cclog.Infof(\"Cleaning up checkpoints older than %s...\", from.Format(time.RFC3339))","+ n, err := metricstore.CleanupCheckpoints(","+ metricstore.Keys.Checkpoints.RootDir, cleanupDir, from.Unix(), deleteMode)","+ if err != nil {","+ return fmt.Errorf(\"checkpoint cleanup: %w\", err)","+ }","+ if deleteMode {","+ cclog.Printf(\"Cleanup done: %d checkpoint files deleted.\", n)","+ } else {","+ cclog.Printf(\"Cleanup done: %d checkpoint files archived to parquet.\", n)","+ }","+ return nil","+ }","+"," natsConfig := ccconf.GetPackageConfig(\"nats\")"," if err := nats.Init(natsConfig); err != nil {"," cclog.Warnf(\"initializing (optional) nats client: %s\", err.Error())"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"a7832854-e43d-4c37-88a7-4f0eee94dbe7","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"7b4b4ebc-998d-46a8-a69a-ef21849cb85d","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01KWnKbLU9VLJqVtyQpP4VhX","type":"message","role":"assistant","content":[{"type":"text","text":"Now update the README:"}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":769,"cache_read_input_tokens":83971,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":769},"output_tokens":2,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8rG9SVM1r5rfrVcca5","type":"assistant","uuid":"93a81b4a-5739-4fcf-ba4e-52eca2993597","timestamp":"2026-04-01T13:33:01.316Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
{"parentUuid":"93a81b4a-5739-4fcf-ba4e-52eca2993597","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01KWnKbLU9VLJqVtyQpP4VhX","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_015c5bD3GX9CZWdiwGRvotGi","name":"Edit","input":{"replace_all":false,"file_path":"/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md","old_string":"```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n```","new_string":"```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n./cc-metric-store -cleanup-checkpoints # Delete/archive old checkpoints per retention settings, then exit\n```"},"caller":{"type":"direct"}}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":769,"cache_read_input_tokens":83971,"output_tokens":438,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":769,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"}},"requestId":"req_011CZd8rG9SVM1r5rfrVcca5","type":"assistant","uuid":"a12d3cc6-29ca-454e-b926-38472c5e4961","timestamp":"2026-04-01T13:33:05.656Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"a12d3cc6-29ca-454e-b926-38472c5e4961","isSidechain":false,"promptId":"44fccb29-2cc3-4c73-88d1-c739c7a02c8c","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_015c5bD3GX9CZWdiwGRvotGi","type":"tool_result","content":"The file /Users/jan/prg/ClusterCockpit/cc-metric-store/README.md has been updated successfully."}]},"uuid":"935539bd-c65a-44ae-912e-35180fab5232","timestamp":"2026-04-01T13:33:05.667Z","toolUseResult":{"filePath":"/Users/jan/prg/ClusterCockpit/cc-metric-store/README.md","oldString":"```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n```","newString":"```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n./cc-metric-store -cleanup-checkpoints # Delete/archive old checkpoints per retention settings, then exit\n```","originalFile":"# ClusterCockpit Metric Store\n\n[![Build & Test](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml/badge.svg)](https://github.com/ClusterCockpit/cc-metric-store/actions/workflows/test.yml)\n\nThe cc-metric-store provides a simple in-memory time series database for storing\nmetrics of cluster nodes at preconfigured intervals. It is meant to be used as\npart of the [ClusterCockpit suite](https://github.com/ClusterCockpit). As all\ndata is kept in-memory, accessing it is very fast. It also provides topology aware\naggregations over time _and_ nodes/sockets/cpus.\n\nThe storage engine is provided by the\n[cc-backend](https://github.com/ClusterCockpit/cc-backend) package\n(`cc-backend/pkg/metricstore`). This repository provides the HTTP API wrapper.\n\nThe [NATS.io](https://nats.io/) based writing endpoint and the HTTP write\nendpoint both consume messages in [this format of the InfluxDB line\nprotocol](https://github.com/ClusterCockpit/cc-specifications/blob/master/metrics/lineprotocol_alternative.md).\n\n## Building\n\n`cc-metric-store` can be built using the provided `Makefile`.\nIt supports the following targets:\n\n- `make`: Build the application, copy an example configuration file and generate\n checkpoint folders if required.\n- `make clean`: Clean the golang build cache and application binary\n- `make distclean`: In addition to the clean target also remove the `./var`\n folder and `config.json`\n- `make swagger`: Regenerate the Swagger files from the source comments.\n- `make test`: Run tests and basic checks (`go build`, `go vet`, `go test`).\n\n## Running\n\n```sh\n./cc-metric-store # Uses ./config.json\n./cc-metric-store -config /path/to/config.json\n./cc-metric-store -dev # Enable Swagger UI at /swagger/\n./cc-metric-store -loglevel debug # debug|info|warn (default)|err|crit\n./cc-metric-store -logdate # Add date and time to log messages\n./cc-metric-store -version # Show version information and exit\n./cc-metric-store -gops # Enable gops agent for debugging\n```\n\n## REST API Endpoints\n\nThe REST API is documented in [swagger.json](./api/swagger.json). You can\nexplore and try the REST API using the integrated [SwaggerUI web\ninterface](http://localhost:8082/swagger/) (requires the `-dev` flag).\n\nFor more information on the `cc-metric-store` REST API have a look at the\nClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-rest-api/).\n\nAll endpoints support both trailing-slash and non-trailing-slash variants:\n\n| Method | Path | Description |\n| ------ | ------------------- | -------------------------------------- |\n| `GET` | `/api/query/` | Query metrics with selectors |\n| `POST` | `/api/write/` | Write metrics (InfluxDB line protocol) |\n| `POST` | `/api/free/` | Free buffers up to a timestamp |\n| `GET` | `/api/debug/` | Dump internal state |\n| `GET` | `/api/healthcheck/` | Check node health status |\n\nIf `jwt-public-key` is set in `config.json`, all endpoints require JWT\nauthentication using an Ed25519 key (`Authorization: Bearer <token>`).\n\n## Run tests\n\nSome benchmarks concurrently access the `MemoryStore`, so enabling the\n[Race Detector](https://golang.org/doc/articles/race_detector) might be useful.\nThe benchmarks also work as tests as they do check if the returned values are as\nexpected.\n\n```sh\n# Tests only\ngo test -v ./...\n\n# Benchmarks as well\ngo test -bench=. -race -v ./...\n```\n\n## What are these selectors mentioned in the code?\n\nThe cc-metric-store works as a time-series database and uses the InfluxDB line\nprotocol as input format. Unlike InfluxDB, the data is indexed by one single\nstrictly hierarchical tree structure. A selector is built out of the tags in the\nInfluxDB line protocol, and can be used to select a node (not in the sense of a\ncompute node, can also be a socket, cpu, ...) in that tree. The implementation\ncalls those nodes `level` to avoid confusion. It is impossible to access data\nonly by knowing the _socket_ or _cpu_ tag — all higher up levels have to be\nspecified as well.\n\nThis is what the hierarchy currently looks like:\n\n- cluster1\n - host1\n - socket0\n - socket1\n - ...\n - cpu1\n - cpu2\n - cpu3\n - cpu4\n - ...\n - gpu1\n - gpu2\n - host2\n - ...\n- cluster2\n- ...\n\nExample selectors:\n\n1. `[\"cluster1\", \"host1\", \"cpu0\"]`: Select only the cpu0 of host1 in cluster1\n2. `[\"cluster1\", \"host1\", [\"cpu4\", \"cpu5\", \"cpu6\", \"cpu7\"]]`: Select only CPUs 4-7 of host1 in cluster1\n3. `[\"cluster1\", \"host1\"]`: Select the complete node. If querying for a CPU-specific metric such as flops, all CPUs are implied\n\n## Config file\n\nThe config file is a JSON document with four top-level sections.\n\n### `main`\n\n```json\n\"main\": {\n \"addr\": \"0.0.0.0:8082\",\n \"https-cert-file\": \"\",\n \"https-key-file\": \"\",\n \"jwt-public-key\": \"<base64-encoded Ed25519 public key>\",\n \"user\": \"\",\n \"group\": \"\",\n \"backend-url\": \"\"\n}\n```\n\n- `addr`: Address and port to listen on (default: `0.0.0.0:8082`)\n- `https-cert-file` / `https-key-file`: Paths to TLS certificate/key for HTTPS\n- `jwt-public-key`: Base64-encoded Ed25519 public key for JWT authentication. If empty, no auth is required.\n- `user` / `group`: Drop privileges to this user/group after startup\n- `backend-url`: Optional URL of a cc-backend instance used as node provider\n\n### `metrics`\n\nPer-metric configuration. Each key is the metric name:\n\n```json\n\"metrics\": {\n \"cpu_load\": { \"frequency\": 60, \"aggregation\": null },\n \"flops_any\": { \"frequency\": 60, \"aggregation\": \"sum\" },\n \"cpu_user\": { \"frequency\": 60, \"aggregation\": \"avg\" }\n}\n```\n\n- `frequency`: Sampling interval in seconds\n- `aggregation`: How to aggregate sub-level data: `\"sum\"`, `\"avg\"`, or `null` (no aggregation)\n\n### `metric-store`\n\n```json\n\"metric-store\": {\n \"checkpoints\": {\n \"file-format\": \"wal\",\n \"directory\": \"./var/checkpoints\"\n },\n \"memory-cap\": 100,\n \"retention-in-memory\": \"24h\",\n \"num-workers\": 0,\n \"cleanup\": {\n \"mode\": \"archive\",\n \"directory\": \"./var/archive\"\n },\n \"nats-subscriptions\": [\n { \"subscribe-to\": \"hpc-nats\", \"cluster-tag\": \"fritz\" }\n ]\n}\n```\n\n- `checkpoints.file-format`: Checkpoint format: `\"wal\"` (default, binary WAL, crash-safe) or `\"json\"` (human-readable). See [Checkpoint formats](#checkpoint-formats) below.\n- `checkpoints.directory`: Root directory for checkpoint files (organized as `<dir>/<cluster>/<host>/`)\n- `memory-cap`: Memory cap in GB for metric buffers\n- `retention-in-memory`: How long to keep data in memory (e.g. `\"48h\"`)\n- `num-workers`: Number of parallel workers for checkpoint/archive I/O (0 = auto, capped at 10)\n- `cleanup.mode`: What to do with data older than `retention-in-memory`: `\"archive\"` (write Parquet) or `\"delete\"`\n- `cleanup.directory`: Root directory for Parquet archive files (required when `mode` is `\"archive\"`)\n- `nats-subscriptions`: List of NATS subjects to subscribe to, with associated cluster tag\n\n### Checkpoint formats\n\nThe `checkpoints.file-format` field controls how in-memory data is persisted to disk.\n\n**`\"wal\"` (default)** — binary Write-Ahead Log format designed for crash safety. Two file\ntypes are used per host:\n\n- `current.wal` — append-only binary log. Every incoming data point is appended\n immediately (magic `0xCC1DA7A1`, 4-byte CRC32 per record). Truncated trailing\n records from unclean shutdowns are silently skipped on restart.\n- `<timestamp>.bin` — binary snapshot written at each checkpoint interval\n (magic `0xCC5B0001`). Contains the complete hierarchical metric state\n column-by-column. Written atomically via a `.tmp` rename.\n\nOn startup the most recent `.bin` snapshot is loaded, then any remaining WAL\nentries are replayed on top. The WAL is rotated (old file deleted, new one\nstarted) after each successful snapshot.\n\n**`\"json\"`** — human-readable JSON snapshots written periodically. Each snapshot\nis stored as `<dir>/<cluster>/<host>/<timestamp>.json` and contains the full\nmetric hierarchy. Easy to inspect and recover manually, but larger on disk and\nslower to write. Still provided to migrate from previous installations; `\"wal\"`\nwill be the only supported format in a future release.\n\n### Parquet archive\n\nWhen `cleanup.mode` is `\"archive\"`, data that ages out of the in-memory\nretention window is written to [Apache Parquet](https://parquet.apache.org/)\nfiles before being freed. Files are organized as:\n\n```\n<cleanup.directory>/\n <cluster>/\n <timestamp>.parquet\n```\n\nOne Parquet file is produced per cluster per cleanup run, consolidating all\nhosts. Rows use a long (tidy) schema:\n\n| Column | Type | Description |\n| ----------- | ------- | ----------------------------------------------------------------------- |\n| `cluster` | string | Cluster name |\n| `hostname` | string | Host name |\n| `metric` | string | Metric name |\n| `scope` | string | Hardware scope (`node`, `socket`, `core`, `hwthread`, `accelerator`, …) |\n| `scope_id` | string | Numeric ID within the scope (e.g. `\"0\"`) |\n| `timestamp` | int64 | Unix timestamp (seconds) |\n| `frequency` | int64 | Sampling interval in seconds |\n| `value` | float32 | Metric value |\n\nFiles are compressed with Zstandard and sorted by `(cluster, hostname, metric,\ntimestamp)` for efficient columnar reads. The `cpu` prefix in the tree is\ntreated as an alias for `hwthread` scope.\n\n### `nats`\n\n```json\n\"nats\": {\n \"address\": \"nats://0.0.0.0:4222\",\n \"username\": \"root\",\n \"password\": \"root\"\n}\n```\n\nNATS connection is optional. If not configured, only the HTTP write endpoint is available.\n\nFor more information see the ClusterCockpit documentation [website](https://clustercockpit.org/docs/reference/cc-metric-store/ccms-configuration/).\n\n## Test the complete setup (excluding cc-backend itself)\n\nThere are two ways for sending data to the cc-metric-store, both of which are\nsupported by the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector).\nThis example uses NATS; the alternative is to use HTTP.\n\n```sh\n# Only needed once, downloads the docker image\ndocker pull nats:latest\n\n# Start the NATS server\ndocker run -p 4222:4222 -ti nats:latest\n```\n\nSecond, build and start the\n[cc-metric-collector](https://github.com/ClusterCockpit/cc-metric-collector)\nusing the following as Sink-Config:\n\n```json\n{\n \"type\": \"nats\",\n \"host\": \"localhost\",\n \"port\": \"4222\",\n \"database\": \"updates\"\n}\n```\n\nThird, build and start the metric store. For this example here, the\n`config.json` file already in the repository should work just fine.\n\n```sh\n# Assuming you have a clone of this repo in ./cc-metric-store:\ncd cc-metric-store\nmake\n./cc-metric-store\n```\n\nAnd finally, use the API to fetch some data. The API is protected by JWT based\nauthentication if `jwt-public-key` is set in `config.json`. You can use this JWT\nfor testing:\n`REDACTED`\n\n```sh\nJWT=\"REDACTED\"\n\n# If the collector and store and nats-server have been running for at least 60 seconds on the same host:\ncurl -H \"Authorization: Bearer $JWT\" \\\n \"http://localhost:8082/api/query/\" \\\n -d '{\n \"cluster\": \"testcluster\",\n \"from\": '\"$(expr $(date +%s) - 60)\"',\n \"to\": '\"$(date +%s)\"',\n \"queries\": [{ \"metric\": \"cpu_load\", \"host\": \"'\"$(hostname)\"'\" }]\n }'\n```\n\nFor debugging, the debug endpoint dumps the current content to stdout:\n\n```sh\nJWT=\"REDACTED\"\n\n# Dump everything\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/\"\n\n# Dump a specific selector (colon-separated path)\ncurl -H \"Authorization: Bearer $JWT\" \"http://localhost:8082/api/debug/?selector=testcluster:host1\"\n```\n","structuredPatch":[{"oldStart":39,"oldLines":6,"newStart":39,"newLines":7,"lines":[" ./cc-metric-store -logdate # Add date and time to log messages"," ./cc-metric-store -version # Show version information and exit"," ./cc-metric-store -gops # Enable gops agent for debugging","+./cc-metric-store -cleanup-checkpoints # Delete/archive old checkpoints per retention settings, then exit"," ```"," "," ## REST API Endpoints"]}],"userModified":false,"replaceAll":false},"sourceToolAssistantUUID":"a12d3cc6-29ca-454e-b926-38472c5e4961","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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{"parentUuid":"418e972e-5d5e-4d2a-a3c1-1f2e8ed01819","isSidechain":false,"message":{"model":"claude-sonnet-4-6","id":"msg_01UUe3FJRB2TTiEXdDH5B1DA","type":"message","role":"assistant","content":[{"type":"text","text":"Clean. The only applicable missing flag was `-cleanup-checkpoints`. All other cc-backend flags (`-init-db`, `-migrate-db`, `-add-user`, `-jwt`, etc.) are database/user-management features specific to cc-backend.\n\n**What was added:**\n\n- **`-cleanup-checkpoints`** flag in `main.go`: reads the `metric-store` config section, decodes it into `metricstore.Keys`, computes the cutoff from `retention-in-memory`, then calls `metricstore.CleanupCheckpoints()` and exits — without starting the server or loading checkpoint data into RAM. Respects the configured `cleanup.mode` (`\"delete\"` or `\"archive\"`).\n- Updated `README.md` running section to document the new flag."}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":108,"cache_read_input_tokens":85330,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":108},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"}},"requestId":"req_011CZd8sM2QdrWArSGpKycjC","type":"assistant","uuid":"707d7a41-dc37-4d2a-ba30-b03827f5345e","timestamp":"2026-04-01T13:33:21.571Z","userType":"external","entrypoint":"cli","cwd":"/Users/jan/prg/ClusterCockpit/cc-metric-store","sessionId":"b03cb029-abe2-43af-9bd1-80d5278334c4","version":"2.1.81","gitBranch":"dev","slug":"stateful-frolicking-jellyfish"}
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