Merge pull request #231 from ClusterCockpit/likwid-lint-fix

likwidMetric: Replace deprecated x/thread package

collectors/collectorManager.go

@@ -50,6 +50,8 @@ var AvailableCollectors = map[string]MetricCollector{
 	"nfsiostat":          new(NfsIOStatCollector),
 	"slurm_cgroup":       new(SlurmCgroupCollector),
 	"smartmon":           new(SmartMonCollector),
+	"lenovo_dense_power": new(LenovoDensePowerCollector),
+	"megware_eureka":     new(MegwareEurekaCollector),
 }
 
 // Metric collector manager data structure

collectors/cpufreqCpuinfoMetric.go

@@ -116,6 +116,9 @@ func (m *CPUFreqCpuInfoCollector) Init(_ json.RawMessage) error {
 			physicalPackageID = ""
 		}
 	}
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("%s Init(): Call to scanner.Err failed: %w", m.name, err)
+	}
 
 	if err := file.Close(); err != nil {
 		return fmt.Errorf("%s Init(): Call to file.Close() failed: %w", m.name, err)
@@ -179,6 +182,9 @@ func (m *CPUFreqCpuInfoCollector) Read(interval time.Duration, output chan lp.CC
 			}
 		}
 	}
+	if err := scanner.Err(); err != nil {
+		cclog.ComponentErrorf(m.name, "Read(): Call to scanner.Err failed: %s", err.Error())
+	}
 }
 
 func (m *CPUFreqCpuInfoCollector) Close() {

collectors/cpustatMetric.go

@@ -44,7 +44,7 @@ type CpustatCollector struct {
 func (m *CpustatCollector) Init(config json.RawMessage) error {
 	m.name = "CpustatCollector"
 	if err := m.setup(); err != nil {
-		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+		return fmt.Errorf("%s Init(): setup() call failed: %s", m.name, err.Error())
 	}
 	m.parallel = true
 	m.meta = map[string]string{
@@ -58,7 +58,7 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {
 		d := json.NewDecoder(bytes.NewReader(config))
 		d.DisallowUnknownFields()
 		if err := d.Decode(&m.config); err != nil {
-			return fmt.Errorf("%s Init(): Error decoding JSON config: %w", m.name, err)
+			return fmt.Errorf("%s Init(): Error decoding JSON config: %s", m.name, err.Error())
 		}
 	}
 	matches := map[string]int{
@@ -85,7 +85,7 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {
 	// Check input file
 	file, err := os.Open(CPUSTATFILE)
 	if err != nil {
-		return fmt.Errorf("%s Init(): Failed to open file '%s': %w", m.name, CPUSTATFILE, err)
+		return fmt.Errorf("%s Init(): Failed to open file '%s': %s", m.name, CPUSTATFILE, err.Error())
 	}
 
 	// Pre-generate tags for all CPUs
@@ -117,10 +117,13 @@ func (m *CpustatCollector) Init(config json.RawMessage) error {
 			num_cpus++
 		}
 	}
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("%s Init(): Call to scanner.Err failed: %s", m.name, err.Error())
+	}
 
 	// Close file
 	if err := file.Close(); err != nil {
-		return fmt.Errorf("%s Init(): Failed to close file '%s': %w", m.name, CPUSTATFILE, err)
+		return fmt.Errorf("%s Init(): Failed to close file '%s': %s", m.name, CPUSTATFILE, err.Error())
 	}
 
 	m.lastTimestamp = time.Now()
@@ -173,13 +176,13 @@ func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMessage
 	if err != nil {
 		cclog.ComponentError(
 			m.name,
-			fmt.Sprintf("Read(): Failed to open file '%s': %v", CPUSTATFILE, err))
+			fmt.Sprintf("Read(): Failed to open file '%s': %v", CPUSTATFILE, err.Error()))
 	}
 	defer func() {
 		if err := file.Close(); err != nil {
 			cclog.ComponentError(
 				m.name,
-				fmt.Sprintf("Read(): Failed to close file '%s': %v", string(CPUSTATFILE), err))
+				fmt.Sprintf("Read(): Failed to close file '%s': %v", string(CPUSTATFILE), err.Error()))
 		}
 	}()
 
@@ -194,6 +197,9 @@ func (m *CpustatCollector) Read(interval time.Duration, output chan lp.CCMessage
 			num_cpus++
 		}
 	}
+	if err := scanner.Err(); err != nil {
+		cclog.ComponentErrorf(m.name, "Init(): Call to scanner.Err failed: %s", err.Error())
+	}
 
 	if !m.config.excludeNumCPUs {
 		if num_cpus_metric, err := lp.NewMetric("num_cpus", m.nodetags, m.meta, num_cpus, now); err == nil {

collectors/diskstatMetric.go

@@ -147,6 +147,11 @@ mountLoop:
 			}
 		}
 	}
+	if err := scanner.Err(); err != nil {
+		cclog.ComponentErrorf(
+			m.name,
+			"Read(): Call to scanner.Err failed: %s", err.Error())
+	}
 	if m.allowedMetrics["part_max_used"] {
 		y, err := lp.NewMetric("part_max_used", map[string]string{"type": "node"}, m.meta, int(part_max_used), time.Now())
 		if err == nil {

collectors/iostatMetric.go

@@ -48,13 +48,13 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
 	m.parallel = true
 	m.meta = map[string]string{"source": m.name, "group": "Disk"}
 	if err := m.setup(); err != nil {
-		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+		return fmt.Errorf("%s Init(): setup() call failed: %s", m.name, err.Error())
 	}
 	if len(config) > 0 {
 		d := json.NewDecoder(bytes.NewReader(config))
 		d.DisallowUnknownFields()
 		if err := d.Decode(&m.config); err != nil {
-			return fmt.Errorf("%s Init(): Error decoding JSON config: %w", m.name, err)
+			return fmt.Errorf("%s Init(): Error decoding JSON config: %s", m.name, err.Error())
 		}
 	}
 	// https://www.kernel.org/doc/html/latest/admin-guide/iostats.html
@@ -89,7 +89,7 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
 	}
 	file, err := os.Open(IOSTATFILE)
 	if err != nil {
-		return fmt.Errorf("%s Init(): Failed to open file \"%s\": %w", m.name, IOSTATFILE, err)
+		return fmt.Errorf("%s Init(): Failed to open file \"%s\": %s", m.name, IOSTATFILE, err.Error())
 	}
 
 	scanner := bufio.NewScanner(file)
@@ -130,8 +130,11 @@ func (m *IOstatCollector) Init(config json.RawMessage) error {
 			lastValues:    lastValues,
 		}
 	}
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("%s Init(): Failed to scan content of file %q: %s", m.name, IOSTATFILE, err.Error())
+	}
 	if err := file.Close(); err != nil {
-		return fmt.Errorf("%s Init(): Failed to close file \"%s\": %w", m.name, IOSTATFILE, err)
+		return fmt.Errorf("%s Init(): Failed to close file \"%s\": %s", m.name, IOSTATFILE, err.Error())
 	}
 
 	m.init = true
@@ -147,14 +150,14 @@ func (m *IOstatCollector) Read(interval time.Duration, output chan lp.CCMessage)
 	if err != nil {
 		cclog.ComponentError(
 			m.name,
-			fmt.Sprintf("Read(): Failed to open file '%s': %v", IOSTATFILE, err))
+			fmt.Sprintf("Read(): Failed to open file '%s': %s", IOSTATFILE, err.Error()))
 		return
 	}
 	defer func() {
 		if err := file.Close(); err != nil {
 			cclog.ComponentError(
 				m.name,
-				fmt.Sprintf("Read(): Failed to close file '%s': %v", IOSTATFILE, err))
+				fmt.Sprintf("Read(): Failed to close file '%s': %s", IOSTATFILE, err.Error()))
 		}
 	}()
 
@@ -198,6 +201,11 @@ func (m *IOstatCollector) Read(interval time.Duration, output chan lp.CCMessage)
 		}
 		m.devices[device] = entry
 	}
+	if err := scanner.Err(); err != nil {
+		cclog.ComponentErrorf(
+			m.name,
+			"Read(): Failed to scan content of file %q: %s", IOSTATFILE, err.Error())
+	}
 }
 
 func (m *IOstatCollector) Close() {

collectors/ipmiMetric.go

@@ -31,10 +31,12 @@ type IpmiCollector struct {
 		IpmitoolPath    string   `json:"ipmitool_path"`
 		IpmisensorsPath string   `json:"ipmisensors_path"`
 		Sudo            bool     `json:"use_sudo"`
+		IncludeMetrics  []string `json:"include_metrics"`
 	}
 
 	ipmitool       string
 	ipmisensors    string
+	includeMetrics map[string]bool
 }
 
 func (m *IpmiCollector) Init(config json.RawMessage) error {
@@ -64,6 +66,15 @@ func (m *IpmiCollector) Init(config json.RawMessage) error {
 		}
 	}
 
+	// Read metrics to include
+	m.includeMetrics = make(map[string]bool)
+	for _, metric := range m.config.IncludeMetrics {
+		metric = strings.ToLower(strings.TrimSpace(metric))
+		if metric != "" {
+			m.includeMetrics[metric] = true
+		}
+	}
+
 	m.ipmitool = m.config.IpmitoolPath
 	m.ipmisensors = m.config.IpmisensorsPath
 
@@ -145,6 +156,11 @@ func (m *IpmiCollector) readIpmiTool(output chan lp.CCMessage) error {
 			continue
 		}
 		name := strings.ToLower(strings.ReplaceAll(strings.TrimSpace(lv[0]), " ", "_"))
+
+		if len(m.includeMetrics) > 0 && !m.includeMetrics[name] {
+			continue
+		}
+
 		unit := strings.TrimSpace(lv[2])
 		switch unit {
 		case "Volts":
@@ -165,6 +181,9 @@ func (m *IpmiCollector) readIpmiTool(output chan lp.CCMessage) error {
 		y.AddMeta("unit", unit)
 		output <- y
 	}
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("failed to scan output of command: %s", err.Error())
+	}
 
 	// Wait for command end
 	if err := command.Wait(); err != nil {
@@ -209,6 +228,11 @@ func (m *IpmiCollector) readIpmiSensors(output chan lp.CCMessage) error {
 			continue
 		}
 		name := strings.ToLower(strings.ReplaceAll(lv[1], " ", "_"))
+
+		if len(m.includeMetrics) > 0 && !m.includeMetrics[name] {
+			continue
+		}
+
 		y, err := lp.NewMetric(name, map[string]string{"type": "node"}, m.meta, v, time.Now())
 		if err != nil {
 			cclog.ComponentErrorf(m.name, "Failed to create message: %v", err)

collectors/ipmiMetric.md

@@ -15,7 +15,8 @@ hugo_path: docs/reference/cc-metric-collector/collectors/ipmi.md
   "ipmistat": {
     "ipmitool_path": "/path/to/ipmitool",
     "ipmisensors_path": "/path/to/ipmi-sensors",
-    "use_sudo": true
+    "use_sudo": true,
+    "include_metrics" : []
   }
 ```
 
@@ -36,3 +37,5 @@ Defaults: monitoring !log_allowed, !pam_session
 monitoring ALL = (root) NOPASSWD:/usr/bin/ipmitool sensor
 monitoring ALL = (root) NOPASSWD:/usr/sbin/ipmi-sensors --comma-separated-output --sdr-cache-recreate
 ```
+
+If `include_ipmi_metrics` contains any entry, ipmistat collector will only submit these metrics. Any other values will get discarded. 

collectors/lenovoDensePower.go

@@ -0,0 +1,170 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+// additional authors:
+// Michael Panzlaff (NHR@FAU)
+
+package collectors
+
+import (
+	"bytes"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
+)
+
+type LenovoDensePowerCollector struct {
+	metricCollector
+
+	config struct {
+		IpmitoolPath string `json:"ipmitool_path"`
+		Sudo         bool   `json:"use_sudo"`
+	}
+
+	ipmitool string
+
+	energyValLast  float64
+	energyTimeLast time.Time
+}
+
+func (m *LenovoDensePowerCollector) Init(config json.RawMessage) error {
+	// Check if already initialized
+	if m.init {
+		return nil
+	}
+
+	m.name = "LenovoDensePowerCollector"
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "IPMI",
+	}
+
+	m.config.IpmitoolPath = "ipmitool"
+
+	if len(config) > 0 {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&m.config); err != nil {
+			return fmt.Errorf("%s Init(): Error decoding JSON config: %w", m.name, err)
+		}
+	}
+
+	m.ipmitool = m.config.IpmitoolPath
+
+	energyVal, energyTime, err := m.readEnergy()
+	if err != nil {
+		return fmt.Errorf("energy reading test failed: %w", err)
+	}
+
+	m.energyValLast = energyVal
+	m.energyTimeLast = energyTime
+	m.init = true
+
+	return nil
+}
+
+func (m *LenovoDensePowerCollector) readEnergy() (float64, time.Time, error) {
+	argv := make([]string, 0)
+	if m.config.Sudo {
+		argv = append(argv, "sudo", "-n")
+	}
+
+	// The Lenovo hardware wants this magic byte string
+	lenovoRequestEnergyMsg := []uint8{0x3a, 0x32, 4, 2, 0, 0, 0}
+
+	argv = append(argv, m.ipmitool, "raw")
+
+	for _, val := range lenovoRequestEnergyMsg {
+		argv = append(argv, strconv.Itoa(int(val)))
+	}
+
+	cmd := exec.Command(argv[0], argv[1:]...)
+
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+
+	err := cmd.Run()
+	if err != nil {
+		return 0, time.Unix(0, 0), fmt.Errorf("failed to run ipmitool: %w (stdout=%s stderr=%s)", err, stdout.String(), stderr.String())
+	}
+
+	data, err := hex.DecodeString(strings.ReplaceAll(strings.TrimSpace(stdout.String()), " ", ""))
+	if err != nil {
+		return 0, time.Unix(0, 0), fmt.Errorf("unable to decode ipmitool hex output: %w (stdout=%s)", err, stdout.String())
+	}
+
+	if len(data) != 14 {
+		return 0, time.Unix(0, 0), fmt.Errorf("result must be 14 bytes as specified in the documentation")
+	}
+
+	// data is laid out like this:
+	// data[0 to 1]: FIFO index of value (for debug only)
+	// data[2 to 5]: Integer part of energy in J (little endian)
+	// data[6 to 7]: Fraction part of energy in mJ (little endian)
+	// data[8 to 11]: Integer part of Unix time of measurement in seconds (little endian)
+	// data[12 to 13]: Fraction part of Unix time of measurement in milliseconds (little endian)
+	wholeJoules := (uint32(data[2]) << 0) | (uint32(data[3]) << 8) | (uint32(data[4]) << 16) | (uint32(data[5]) << 24)
+	milliJoules := uint16(data[6]) | (uint16(data[7]) << 8)
+	finalJoules := float64(wholeJoules) + float64(milliJoules)*1e-3
+
+	wholeSeconds := (uint32(data[8]) << 0) | (uint32(data[9]) << 8) | (uint32(data[10]) << 16) | (uint32(data[11]) << 24)
+	milliSeconds := uint16(data[12]) | (uint16(data[13]) << 8)
+	finalTime := time.Unix(int64(wholeSeconds), (int64(milliSeconds) * 1000000))
+
+	return finalJoules, finalTime, nil
+}
+
+func (m *LenovoDensePowerCollector) Read(interval time.Duration, output chan lp.CCMessage) {
+	// Check if already initialized
+	if !m.init {
+		return
+	}
+
+	energyVal, energyTime, err := m.readEnergy()
+	if err != nil {
+		cclog.ComponentErrorf(m.name, "readEnergy failed: %v", err)
+		return
+	}
+
+	powerVal := 0.0
+	if energyTime.Compare(m.energyTimeLast) != 0 {
+		// Check for overflow
+		energyValDiff := int64(energyVal) - int64(m.energyValLast)
+		if energyVal < m.energyValLast {
+			energyValDiff += int64(0x100000000)
+		}
+		energyTimeDiff := energyTime.Sub(m.energyTimeLast)
+		if energyTime.Before(m.energyTimeLast) {
+			energyTimeDiff = energyTimeDiff + 0x100000000*time.Second
+		}
+		powerVal = float64(energyValDiff) / energyTimeDiff.Seconds()
+
+		m.energyValLast = energyVal
+		m.energyTimeLast = energyTime
+	}
+
+	metric, err := lp.NewMetric("lenovo_node_power", map[string]string{"type": "node"}, m.meta, powerVal, energyTime)
+	if err != nil {
+		cclog.ComponentErrorf(m.name, "lp.NewMetric failed: %v", err)
+		return
+	}
+	metric.AddMeta("unit", "Watts")
+	output <- metric
+}
+
+func (m *LenovoDensePowerCollector) Close() {
+	m.init = false
+}

collectors/lenovoDensePower.md

@@ -0,0 +1,51 @@
+<!--
+---
+title: Lenovo Dense Power collector
+description: Collect power of Lenovo Dense machines using ipmitool raw
+categories: [cc-metric-collector]
+tags: ['Admin']
+weight: 2
+hugo_path: docs/reference/cc-metric-collector/collectors/lenovoDensePower.md
+---
+-->
+
+## `lenovo_dense_power` collector
+
+```json
+  "lenovo_dense_power": {
+    "ipmitool_path": "/path/to/ipmitool",
+    "use_sudo": true,
+    "include_metrics" : []
+  }
+```
+
+The `lenovo_dense_power` collector reads power from Lenovo Dense machines via `ipmitool` (`ipmitool raw ...`). This collector is known to only work on the following machines. Others are not supported, so use at your *OWN* risk:
+
+System                                    | Compatibility             | Power measured
+---                                       | ---                       | ---
+Lenovo ThinkSystem SD650 V2/V3            | untested, but should work | node + riser1 + riser2
+Lenovo ThinkSystem SD650-N V2/ SD650-I V3 | untested, but should work | node + riser1 + riser2 + gpus
+Lenovo ThinkSystem SD665-N V3             | tested, known to work     | node + riser1 + riser2 + gpus
+
+To test if your system *may* be supported, you can run the following command *at your own risk*:
+
+```
+$ ipmitool raw 58 50 4 2 0 0 0
+ c4 00 83 a9 cb d3 a2 03 df db 47 6a d8 01
+```
+
+Exactly 14 bytes should be returned.
+In case not or another error occurs your hardware is likely not supported.
+
+In addition, `ipmitool` typically require root to run.
+In order to run `cc-metric-collector` without root priviliges, you can enable `use_sudo`.
+Add a file like this in `/etc/sudoers.d/` to allow `cc-metric-collector` to run the required commands:
+
+```
+# Do not log the following sudo commands from monitoring, since this causes a lot of log spam.
+# However keep log_denied enabled, to detect failures
+Defaults: monitoring !log_allowed, !pam_session
+
+# Allow to use ipmitool for Lenovo power readings
+monitoring ALL = (root) NOPASSWD:/usr/bin/ipmitool raw 58 50 4 2 0 0 0
+```

collectors/likwidMetric.go

@@ -38,7 +38,7 @@ import (
 	topo "github.com/ClusterCockpit/cc-metric-collector/pkg/ccTopology"
 	"github.com/NVIDIA/go-nvml/pkg/dl"
 	"github.com/fsnotify/fsnotify"
-	"golang.design/x/thread"
+	"golang.design/x/runtime/thread"
 )
 
 const (

collectors/megwareEureka.go

@@ -0,0 +1,197 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+// additional authors:
+// Michael Panzlaff (NHR@FAU)
+
+package collectors
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"os/exec"
+	"time"
+
+	cclog "github.com/ClusterCockpit/cc-lib/v2/ccLogger"
+	lp "github.com/ClusterCockpit/cc-lib/v2/ccMessage"
+)
+
+// MPS refers to Monolithic Power Systems, from which the MP5922 is used
+// to measure telemetry on the Eureka platform.
+type mpsData struct {
+	Cnt         int64   `json:"Cnt"` // No idea what this is, ignore
+	Energy      float64 `json:"Energy"`
+	Vin         float64 `json:"Vin"`
+	Iin         float64 `json:"Iin"`
+	Pin         float64 `json:"Pin"`
+	PinAvg      float64 `json:"PinAvg"`
+	Vout        float64 `json:"Vout"`
+	Iout        float64 `json:"Iout"`
+	Pout        float64 `json:"Pout"`
+	StandbyVout float64 `json:"StandbyVout"`
+	StandbyIout float64 `json:"StandbyIout"`
+	StandbyPout float64 `json:"StandbyPout"`
+	TempBusbar  float64 `json:"TempBusbar"`
+	TempSsd     float64 `json:"TempSsd"`
+	TempMps     float64 `json:"TempMps"`
+	// No idea what the ones below mean exactl. Ignore them for now.
+	EnergyTime         int64 `json:"EnergyTime"`
+	EnergyAccumulator  int64 `json:"EnergyAccumulator"`
+	EnergyRolloverCnt  int64 `json:"EnergyRolloverCnt"`
+	EnergySampleCntU24 int64 `json:"EnergySampleCntU24"`
+
+	Timestamp time.Time
+}
+
+type MegwareEurekaCollector struct {
+	metricCollector
+
+	config struct {
+		U20Path string `json:"u20_path"`
+		Sudo    bool   `json:"use_sudo"`
+	}
+
+	u20path string
+
+	energyValLast  float64
+	energyTimeLast time.Time
+}
+
+func (m *MegwareEurekaCollector) Init(config json.RawMessage) error {
+	// Check if already initialized
+	if m.init {
+		return nil
+	}
+
+	m.name = "MegwareEureka"
+	if err := m.setup(); err != nil {
+		return fmt.Errorf("%s Init(): setup() call failed: %w", m.name, err)
+	}
+	m.meta = map[string]string{
+		"source": m.name,
+		"group":  "U20",
+	}
+
+	m.config.U20Path = "u20"
+
+	if len(config) > 0 {
+		d := json.NewDecoder(bytes.NewReader(config))
+		d.DisallowUnknownFields()
+		if err := d.Decode(&m.config); err != nil {
+			return fmt.Errorf("%s Init(): Error decoding JSON config: %w", m.name, err)
+		}
+	}
+
+	m.u20path = m.config.U20Path
+
+	data, err := m.readMpsData()
+	if err != nil {
+		return fmt.Errorf("energy reading test failed: %w", err)
+	}
+
+	m.energyValLast = data.Energy
+	m.energyTimeLast = time.Now()
+	m.init = true
+
+	return nil
+}
+
+func (m *MegwareEurekaCollector) readMpsData() (*mpsData, error) {
+	argv := make([]string, 0)
+	if m.config.Sudo {
+		argv = append(argv, "sudo", "-n")
+	}
+
+	argv = append(argv, m.u20path, "values", "--read", "GET_MPS_POLL_VALUES")
+
+	cmd := exec.Command(argv[0], argv[1:]...)
+
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+
+	err := cmd.Run()
+	if err != nil {
+		return nil, fmt.Errorf("failed to run u20: %w (stdout=%s stderr=%s)", err, stdout.String(), stderr.String())
+	}
+
+	var u20output struct {
+		GetMpsPollValues mpsData `json:"GET_MPS_POLL_VALUES"`
+	}
+
+	err = json.Unmarshal(stdout.Bytes(), &u20output)
+	if err != nil {
+		return nil, fmt.Errorf("unable to decode u20 JSON output: %w (stdout=%s)", err, stdout.String())
+	}
+
+	fmt.Printf("string: %+v\n", stdout.String())
+	fmt.Printf("obj:    %+v\n", u20output)
+
+	u20output.GetMpsPollValues.Timestamp = time.Now()
+
+	return &u20output.GetMpsPollValues, nil
+}
+
+func (m *MegwareEurekaCollector) Read(interval time.Duration, output chan lp.CCMessage) {
+	// Check if already initialized
+	if !m.init {
+		return
+	}
+
+	data, err := m.readMpsData()
+	if err != nil {
+		cclog.ComponentErrorf(m.name, "readMpsData failed: %v", err)
+		return
+	}
+
+	powerVal := 0.0
+
+	if data.Timestamp.After(m.energyTimeLast) {
+		// Important, m.energy comes in Wh, so multiply by 3600 to get Ws (aka Joule)
+		energyValDiff := data.Energy - m.energyValLast
+		energyTimeDiff := data.Timestamp.Sub(m.energyTimeLast)
+		powerVal = energyValDiff * 3600 / energyTimeDiff.Seconds()
+
+		m.energyValLast = data.Energy
+		m.energyTimeLast = data.Timestamp
+	}
+
+	metricNamePrefix := "eureka_"
+	metricMap := map[string]struct {
+		value any
+		unit  string
+	}{
+		"power":        {value: powerVal, unit: "Watts"},
+		"vin":          {value: data.Vin, unit: "Volts"},
+		"iin":          {value: data.Iin, unit: "Amperes"},
+		"pin":          {value: data.Pin, unit: "Watts"},
+		"pin_avg":      {value: data.PinAvg, unit: "Watts"},
+		"vout":         {value: data.Vout, unit: "Volts"},
+		"iout":         {value: data.Iout, unit: "Amperes"},
+		"pout":         {value: data.Pout, unit: "Watts"},
+		"standby_vout": {value: data.StandbyVout, unit: "Volts"},
+		"standby_iout": {value: data.StandbyIout, unit: "Amperes"},
+		"standby_pout": {value: data.StandbyPout, unit: "Watts"},
+		"temp_busbar":  {value: data.TempBusbar, unit: "degC"},
+		"temp_ssd":     {value: data.TempSsd, unit: "degC"},
+		"temp_mps":     {value: data.TempMps, unit: "degC"},
+	}
+
+	for metricName, metricData := range metricMap {
+		metricName = metricNamePrefix + metricName
+		metric, err := lp.NewMetric(metricName, map[string]string{"type": "node"}, m.meta, metricData.value, data.Timestamp)
+		if err != nil {
+			cclog.ComponentErrorf(m.name, "lp.NewMetric failed: %v", err)
+			return
+		}
+		metric.AddMeta("unit", metricData.unit)
+		output <- metric
+	}
+}
+
+func (m *MegwareEurekaCollector) Close() {
+	m.init = false
+}

collectors/megwareEureka.md

@@ -0,0 +1,44 @@
+<!--
+---
+title: Megware Eureka collector
+description: Collect power and other metrics of Megware Eureka machines using u20
+categories: [cc-metric-collector]
+tags: ['Admin']
+weight: 2
+hugo_path: docs/reference/cc-metric-collector/collectors/lenovoDensePower.md
+---
+-->
+
+## `lenovo_dense_power` collector
+
+```json
+  "megware_eureka": {
+    "u20_path": "/path/to/ipmitool",
+    "use_sudo": true
+  }
+```
+
+The `megware_eureka` collector reads power and other metrics from Megware Eureka machines via `u20`.
+If the u20 tool is available for your machines, it's possible that this collector is compatible.
+If you don't have access to u20, please contact your Megware sales person.
+
+You can test the collector compatibility by running the following command:
+
+```
+$ u20 values --read GET_MPS_POLL_VALUES
+```
+
+If this returns a JSON with energy, voltage and current readings, you're fine.
+
+In addition, `u20` typically requires root to run.
+In order to run `cc-metric-collector` without root priviliges, you can enable `use_sudo`.
+Add a file like this in `/etc/sudoers.d/` to allow `cc-metric-collector` to run the required commands:
+
+```
+# Do not log the following sudo commands from monitoring, since this causes a lot of log spam.
+# However keep log_denied enabled, to detect failures
+Defaults: monitoring !log_allowed, !pam_session
+
+# Allow to use u20 for Megware power readings
+monitoring ALL = (root) NOPASSWD:/usr/bin/u20 values --read GET_MPS_POLL_VALUES
+```

collectors/slurmCgroupMetric.go

@@ -7,6 +7,7 @@ import (
 	"os/exec"
 	"os/user"
 	"path/filepath"
+	"regexp"
 	"strconv"
 	"strings"
 	"time"
@@ -45,6 +46,37 @@ type SlurmCgroupCollector struct {
 
 const defaultCgroupBase = "/sys/fs/cgroup/system.slice/slurmstepd.scope"
 
+var (
+	// Slurm cgroup v2 directory layout:
+	// - Slurm <= 25.11: job_<numeric job id>
+	// - Slurm >= 26.05: SLUID, encoded as "s" + 13 Crockford Base32 characters
+	jobIDDirRE = regexp.MustCompile(`^job_[0-9]+$`)
+	sluidDirRE = regexp.MustCompile(`(?i)^s[0-9A-HJKMNP-TV-Z]{13}$`)
+)
+
+func (m *SlurmCgroupCollector) findSlurmJobDirs() ([]string, error) {
+	entries, err := os.ReadDir(m.cgroupBase)
+	if err != nil {
+		return nil, err
+	}
+
+	jobDirs := make([]string, 0)
+
+	for _, entry := range entries {
+		if !entry.IsDir() {
+			continue
+		}
+
+		name := entry.Name()
+
+		if jobIDDirRE.MatchString(name) || sluidDirRE.MatchString(name) {
+			jobDirs = append(jobDirs, filepath.Join(m.cgroupBase, name))
+		}
+	}
+
+	return jobDirs, nil
+}
+
 func ParseCPUs(cpuset string) ([]int, error) {
 	var result []int
 	if cpuset == "" {
@@ -237,10 +269,9 @@ func (m *SlurmCgroupCollector) Read(interval time.Duration, output chan lp.CCMes
 		delete(m.cpuUsed, k)
 	}
 
-	globPattern := filepath.Join(m.cgroupBase, "job_*")
+	jobDirs, err := m.findSlurmJobDirs()
-	jobDirs, err := filepath.Glob(globPattern)
 	if err != nil {
-		cclog.ComponentError(m.name, "Error globbing job directories:", err.Error())
+		cclog.ComponentError(m.name, "Error reading job directories:", err.Error())
 		return
 	}
 

go.mod

@@ -5,11 +5,11 @@ go 1.25.0
 require (
 	github.com/ClusterCockpit/cc-lib/v2 v2.12.0
 	github.com/ClusterCockpit/go-rocm-smi v0.4.0
-	github.com/NVIDIA/go-nvml v0.13.0-1
+	github.com/NVIDIA/go-nvml v0.13.2-0
 	github.com/PaesslerAG/gval v1.2.4
 	github.com/fsnotify/fsnotify v1.10.1
 	github.com/tklauser/go-sysconf v0.4.0
-	golang.design/x/thread v0.3.2
+	golang.design/x/runtime v0.3.0
 	golang.org/x/sys v0.45.0
 )
 

go.sum

@@ -12,8 +12,9 @@ github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migc
 github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM=
 github.com/Microsoft/hcsshim v0.11.4 h1:68vKo2VN8DE9AdN4tnkWnmdhqdbpUFM8OF3Airm7fz8=
 github.com/Microsoft/hcsshim v0.11.4/go.mod h1:smjE4dvqPX9Zldna+t5FG3rnoHhaB7QYxPRqGcpAD9w=
-github.com/NVIDIA/go-nvml v0.13.0-1 h1:OLX8Jq3dONuPOQPC7rndB6+iDmDakw0XTYgzMxObkEw=
 github.com/NVIDIA/go-nvml v0.13.0-1/go.mod h1:+KNA7c7gIBH7SKSJ1ntlwkfN80zdx8ovl4hrK3LmPt4=
+github.com/NVIDIA/go-nvml v0.13.2-0 h1:7M4cFG62wSUHw8i0XSiNU7ejKODytTS6ZrW/vgB2NSI=
+github.com/NVIDIA/go-nvml v0.13.2-0/go.mod h1:ahi2psRYoa+wYUBIrZPRO+wJs9lcvMhxSSkjjvsJJNQ=
 github.com/PaesslerAG/gval v1.2.4 h1:rhX7MpjJlcxYwL2eTTYIOBUyEKZ+A96T9vQySWkVUiU=
 github.com/PaesslerAG/gval v1.2.4/go.mod h1:XRFLwvmkTEdYziLdaCeCa5ImcGVrfQbeNUbVR+C6xac=
 github.com/PaesslerAG/jsonpath v0.1.0 h1:gADYeifvlqK3R3i2cR5B4DGgxLXIPb3TRTH1mGi0jPI=
@@ -173,8 +174,8 @@ go.uber.org/goleak v1.3.0 h1:2K3zAYmnTNqV73imy9J1T3WC+gmCePx2hEGkimedGto=
 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
 go.yaml.in/yaml/v2 v2.4.4 h1:tuyd0P+2Ont/d6e2rl3be67goVK4R6deVxCUX5vyPaQ=
 go.yaml.in/yaml/v2 v2.4.4/go.mod h1:gMZqIpDtDqOfM0uNfy0SkpRhvUryYH0Z6wdMYcacYXQ=
-golang.design/x/thread v0.3.2 h1:FmD1glspGrQCe6FuQLmSrT6wz2CSzq7vKVDluyiMnqo=
+golang.design/x/runtime v0.3.0 h1:8bA+GQfO8A18JXJQlQA56pEc+Sgrbo4cmLzjzmJ58ZI=
-golang.design/x/thread v0.3.2/go.mod h1:6+Hi2rMOgMHZdKDWaqNHyWtoFUx1HxZ06LfHPh5Z/hQ=
+golang.design/x/runtime v0.3.0/go.mod h1:PjVKQjImLdSrvjIw4FmrnCPq9BGs5PMBHb8i6b2BN9I=
 golang.org/x/crypto v0.50.0 h1:zO47/JPrL6vsNkINmLoo/PH1gcxpls50DNogFvB5ZGI=
 golang.org/x/crypto v0.50.0/go.mod h1:3muZ7vA7PBCE6xgPX7nkzzjiUq87kRItoJQM1Yo8S+Q=
 golang.org/x/exp v0.0.0-20231005195138-3e424a577f31 h1:9k5exFQKQglLo+RoP+4zMjOFE14P6+vyR0baDAi0Rcs=

internal/metricAggregator/metricAggregator.go

@@ -128,7 +128,7 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 	vars["starttime"] = starttime
 	vars["endtime"] = endtime
 	for _, f := range c.functions {
-		cclog.ComponentDebug("MetricCache", "COLLECT", f.Name, "COND", f.Condition)
+		cclog.ComponentDebugf("MetricCache", "COLLECT %s COND '%s'", f.Name, f.Condition)
 		var valuesFloat64 []float64
 		var valuesFloat32 []float32
 		var valuesInt []int
@@ -140,7 +140,7 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 			vars["metric"] = m
 			value, err := f.gvalCond.EvalBool(context.Background(), vars)
 			if err != nil {
-				cclog.ComponentError("MetricCache", "COLLECT", f.Name, "COND", f.Condition, ":", err.Error())
+				cclog.ComponentErrorf("MetricCache", "COLLECT %s COND '%s' : %s", f.Name, f.Condition, err.Error())
 				continue
 			}
 			if value {
@@ -160,7 +160,7 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 					case bool:
 						valuesBool = append(valuesBool, x)
 					default:
-						cclog.ComponentError("MetricCache", "COLLECT ADD VALUE", v, "FAILED")
+						cclog.ComponentErrorf("MetricCache", "COLLECT ADD VALUE %v FAILED", v)
 					}
 				}
 				matches = append(matches, m)
@@ -213,13 +213,13 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 			vars["values"] = valuesBool
 			len_values = len(valuesBool)
 		}
-		cclog.ComponentDebug("MetricCache", "EVALUATE", f.Name, "METRICS", len_values, "CALC", f.Function)
+		cclog.ComponentDebugf("MetricCache", "EVALUATE %s METRICS %d CALC '%s'", f.Name, len_values, f.Function)
 
 		vars["metrics"] = matches
 		if len_values > 0 {
 			value, err := gval.Evaluate(f.Function, vars, c.language)
 			if err != nil {
-				cclog.ComponentError("MetricCache", "EVALUATE", f.Name, "METRICS", len_values, "CALC", f.Function, ":", err.Error())
+				cclog.ComponentErrorf("MetricCache", "EVALUATE %s METRICS %d CALC '%s': %s", f.Name, len_values, f.Function, err.Error())
 				break
 			}
 
@@ -273,12 +273,12 @@ func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics
 			case string:
 				m, err = lp.NewMessage(f.Name, tags, meta, map[string]any{"value": t}, starttime)
 			default:
-				cclog.ComponentError("MetricCache", "Gval returned invalid type", t, "skipping metric", f.Name)
+				cclog.ComponentErrorf("MetricCache", "Gval returned invalid type %s skipping metric %s", t, f.Name)
 			}
 			if err != nil {
-				cclog.ComponentError("MetricCache", "Cannot create metric from Gval result", value, ":", err.Error())
+				cclog.ComponentErrorf("MetricCache", "Cannot create metric from Gval result %v: %s", value, err.Error())
 			}
-			cclog.ComponentDebug("MetricCache", "SEND", m)
+			cclog.ComponentDebugf("MetricCache", "SEND %s", m.ToLineProtocol(nil))
 			select {
 			case c.output <- m:
 			default:
@@ -295,12 +295,12 @@ func (c *metricAggregator) AddAggregation(name, function, condition string, tags
 	newcond := strings.ReplaceAll(condition, "'", "\"")
 	gvalCond, err := gval.Full(metricCacheLanguage).NewEvaluable(newcond)
 	if err != nil {
-		cclog.ComponentError("MetricAggregator", "Cannot add aggregation, invalid if condition", newcond, ":", err.Error())
+		cclog.ComponentErrorf("MetricAggregator", "Cannot add aggregation, invalid if condition '%s': %s", newcond, err.Error())
 		return err
 	}
 	gvalFunc, err := gval.Full(metricCacheLanguage).NewEvaluable(newfunc)
 	if err != nil {
-		cclog.ComponentError("MetricAggregator", "Cannot add aggregation, invalid function condition", newfunc, ":", err.Error())
+		cclog.ComponentErrorf("MetricAggregator", "Cannot add aggregation, invalid function condition %s: %s", newfunc, err.Error())
 		return err
 	}
 	for _, agg := range c.functions {