mirror of
https://github.com/ClusterCockpit/cc-metric-collector.git
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Split MetricRouter and MetricAggregator (#24)
* Split MetricRouter and MetricAggregator * Missing change in MetricCache * Add README for MetricAggregator
This commit is contained in:
Thomas Gruber
GitHub
371
internal/metricAggregator/metricAggregator.go
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371
internal/metricAggregator/metricAggregator.go
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@@ -0,0 +1,371 @@
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package metricAggregator
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import (
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"context"
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"fmt"
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"math"
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"os"
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"strings"
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"time"
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cclog "github.com/ClusterCockpit/cc-metric-collector/internal/ccLogger"
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lp "github.com/ClusterCockpit/cc-metric-collector/internal/ccMetric"
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topo "github.com/ClusterCockpit/cc-metric-collector/internal/ccTopology"
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"github.com/PaesslerAG/gval"
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)
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type MetricAggregatorIntervalConfig struct {
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Name string `json:"name"` // Metric name for the new metric
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Function string `json:"function"` // Function to apply on the metric
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Condition string `json:"if"` // Condition for applying function
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Tags map[string]string `json:"tags"` // Tags for the new metric
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Meta map[string]string `json:"meta"` // Meta information for the new metric
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gvalCond gval.Evaluable
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gvalFunc gval.Evaluable
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}
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type metricAggregator struct {
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functions []*MetricAggregatorIntervalConfig
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constants map[string]interface{}
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language gval.Language
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output chan lp.CCMetric
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}
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type MetricAggregator interface {
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AddAggregation(name, function, condition string, tags, meta map[string]string) error
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DeleteAggregation(name string) error
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Init(output chan lp.CCMetric) error
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Eval(starttime time.Time, endtime time.Time, metrics []lp.CCMetric)
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}
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var metricCacheLanguage = gval.NewLanguage(
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gval.Base(),
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gval.Function("sum", sumfunc),
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gval.Function("min", minfunc),
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gval.Function("avg", avgfunc),
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gval.Function("mean", avgfunc),
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gval.Function("max", maxfunc),
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gval.Function("len", lenfunc),
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gval.Function("median", medianfunc),
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gval.InfixOperator("in", infunc),
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gval.Function("match", matchfunc),
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gval.Function("getCpuCore", getCpuCoreFunc),
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gval.Function("getCpuSocket", getCpuSocketFunc),
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gval.Function("getCpuNuma", getCpuNumaDomainFunc),
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gval.Function("getCpuDie", getCpuDieFunc),
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gval.Function("getSockCpuList", getCpuListOfSocketFunc),
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gval.Function("getNumaCpuList", getCpuListOfNumaDomainFunc),
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gval.Function("getDieCpuList", getCpuListOfDieFunc),
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gval.Function("getCoreCpuList", getCpuListOfCoreFunc),
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gval.Function("getCpuList", getCpuListOfNode),
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gval.Function("getCpuListOfType", getCpuListOfType),
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)
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func (c *metricAggregator) Init(output chan lp.CCMetric) error {
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c.output = output
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c.functions = make([]*MetricAggregatorIntervalConfig, 0)
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c.constants = make(map[string]interface{})
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// add constants like hostname, numSockets, ... to constants list
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// Set hostname
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hostname, err := os.Hostname()
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if err != nil {
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cclog.Error(err.Error())
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return err
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}
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// Drop domain part of host name
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c.constants["hostname"] = strings.SplitN(hostname, `.`, 2)[0]
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cinfo := topo.CpuInfo()
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c.constants["numHWThreads"] = cinfo.NumHWthreads
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c.constants["numSockets"] = cinfo.NumSockets
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c.constants["numNumaDomains"] = cinfo.NumNumaDomains
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c.constants["numDies"] = cinfo.NumDies
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c.constants["smtWidth"] = cinfo.SMTWidth
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c.language = gval.NewLanguage(
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gval.Full(),
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metricCacheLanguage,
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)
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// Example aggregation function
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// var f metricCacheFunctionConfig
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// f.Name = "temp_cores_avg"
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// //f.Condition = `"temp_core_" in name`
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// f.Condition = `match("temp_core_%d+", metric.Name())`
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// f.Function = `avg(values)`
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// f.Tags = map[string]string{"type": "node"}
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// f.Meta = map[string]string{"group": "IPMI", "unit": "degC", "source": "TempCollector"}
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// c.functions = append(c.functions, &f)
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return nil
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}
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func (c *metricAggregator) Eval(starttime time.Time, endtime time.Time, metrics []lp.CCMetric) {
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vars := make(map[string]interface{})
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for k, v := range c.constants {
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vars[k] = v
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}
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vars["starttime"] = starttime
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vars["endtime"] = endtime
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for _, f := range c.functions {
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cclog.ComponentDebug("MetricCache", "COLLECT", f.Name, "COND", f.Condition)
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values := make([]float64, 0)
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matches := make([]lp.CCMetric, 0)
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for _, m := range metrics {
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vars["metric"] = m
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//value, err := gval.Evaluate(f.Condition, vars, c.language)
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value, err := f.gvalCond.EvalBool(context.Background(), vars)
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if err != nil {
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cclog.ComponentError("MetricCache", "COLLECT", f.Name, "COND", f.Condition, ":", err.Error())
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continue
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}
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if value {
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v, valid := m.GetField("value")
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if valid {
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switch x := v.(type) {
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case float64:
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values = append(values, x)
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case float32:
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case int:
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case int64:
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values = append(values, float64(x))
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case bool:
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if x {
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values = append(values, float64(1.0))
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} else {
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values = append(values, float64(0.0))
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}
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default:
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cclog.ComponentError("MetricCache", "COLLECT ADD VALUE", v, "FAILED")
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}
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}
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matches = append(matches, m)
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}
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}
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delete(vars, "metric")
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cclog.ComponentDebug("MetricCache", "EVALUATE", f.Name, "METRICS", len(values), "CALC", f.Function)
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vars["values"] = values
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vars["metrics"] = matches
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if len(values) > 0 {
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value, err := gval.Evaluate(f.Function, vars, c.language)
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if err != nil {
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cclog.ComponentError("MetricCache", "EVALUATE", f.Name, "METRICS", len(values), "CALC", f.Function, ":", err.Error())
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break
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}
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copy_tags := func(tags map[string]string, metrics []lp.CCMetric) map[string]string {
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out := make(map[string]string)
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for key, value := range tags {
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switch value {
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case "<copy>":
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for _, m := range metrics {
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v, err := m.GetTag(key)
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if err {
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out[key] = v
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}
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}
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default:
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out[key] = value
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}
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}
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return out
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}
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copy_meta := func(meta map[string]string, metrics []lp.CCMetric) map[string]string {
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out := make(map[string]string)
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for key, value := range meta {
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switch value {
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case "<copy>":
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for _, m := range metrics {
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v, err := m.GetMeta(key)
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if err {
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out[key] = v
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}
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}
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default:
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out[key] = value
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}
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}
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return out
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}
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tags := copy_tags(f.Tags, matches)
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meta := copy_meta(f.Meta, matches)
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var m lp.CCMetric
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switch t := value.(type) {
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case float64:
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m, err = lp.New(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
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case float32:
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m, err = lp.New(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
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case int:
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m, err = lp.New(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
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case int64:
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m, err = lp.New(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
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case string:
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m, err = lp.New(f.Name, tags, meta, map[string]interface{}{"value": t}, starttime)
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default:
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cclog.ComponentError("MetricCache", "Gval returned invalid type", t, "skipping metric", f.Name)
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}
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if err != nil {
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cclog.ComponentError("MetricCache", "Cannot create metric from Gval result", value, ":", err.Error())
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}
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cclog.ComponentDebug("MetricCache", "SEND", m)
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select {
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case c.output <- m:
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default:
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}
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}
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}
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}
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func (c *metricAggregator) AddAggregation(name, function, condition string, tags, meta map[string]string) error {
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// Since "" cannot be used inside of JSON strings, we use '' and replace them here because gval does not like ''
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// but wants ""
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newfunc := strings.ReplaceAll(function, "'", "\"")
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newcond := strings.ReplaceAll(condition, "'", "\"")
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gvalCond, err := gval.Full(metricCacheLanguage).NewEvaluable(newcond)
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if err != nil {
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cclog.ComponentError("MetricAggregator", "Cannot add aggregation, invalid if condition", newcond, ":", err.Error())
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return err
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}
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gvalFunc, err := gval.Full(metricCacheLanguage).NewEvaluable(newfunc)
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if err != nil {
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cclog.ComponentError("MetricAggregator", "Cannot add aggregation, invalid function condition", newfunc, ":", err.Error())
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return err
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}
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for _, agg := range c.functions {
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if agg.Name == name {
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agg.Name = name
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agg.Condition = newcond
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agg.Function = newfunc
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agg.Tags = tags
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agg.Meta = meta
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agg.gvalCond = gvalCond
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agg.gvalFunc = gvalFunc
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return nil
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}
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}
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var agg MetricAggregatorIntervalConfig
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agg.Name = name
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agg.Condition = newcond
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agg.gvalCond = gvalCond
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agg.Function = newfunc
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agg.gvalFunc = gvalFunc
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agg.Tags = tags
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agg.Meta = meta
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c.functions = append(c.functions, &agg)
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return nil
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}
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func (c *metricAggregator) DeleteAggregation(name string) error {
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for i, agg := range c.functions {
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if agg.Name == name {
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copy(c.functions[i:], c.functions[i+1:])
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c.functions[len(c.functions)-1] = nil
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c.functions = c.functions[:len(c.functions)-1]
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return nil
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}
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}
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return fmt.Errorf("no aggregation for metric name %s", name)
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}
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func (c *metricAggregator) AddConstant(name string, value interface{}) {
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c.constants[name] = value
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}
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func (c *metricAggregator) DelConstant(name string) {
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delete(c.constants, name)
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}
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func (c *metricAggregator) AddFunction(name string, function func(args ...interface{}) (interface{}, error)) {
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c.language = gval.NewLanguage(c.language, gval.Function(name, function))
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}
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func EvalBoolCondition(condition string, params map[string]interface{}) (bool, error) {
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newcond := strings.ReplaceAll(condition, "'", "\"")
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newcond = strings.ReplaceAll(newcond, "%", "\\")
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language := gval.NewLanguage(
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gval.Full(),
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metricCacheLanguage,
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)
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value, err := gval.Evaluate(newcond, params, language)
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if err != nil {
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return false, err
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}
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var endResult bool = false
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err = nil
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switch r := value.(type) {
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case bool:
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endResult = r
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case float64:
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if r != 0.0 {
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endResult = true
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}
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case float32:
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if r != 0.0 {
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endResult = true
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}
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case int:
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if r != 0 {
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endResult = true
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}
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case int64:
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if r != 0 {
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endResult = true
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}
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case int32:
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if r != 0 {
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endResult = true
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}
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default:
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err = fmt.Errorf("cannot evaluate '%s' to bool", newcond)
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}
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return endResult, err
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}
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func EvalFloat64Condition(condition string, params map[string]interface{}) (float64, error) {
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var endResult float64 = math.NaN()
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newcond := strings.ReplaceAll(condition, "'", "\"")
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newcond = strings.ReplaceAll(newcond, "%", "\\")
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language := gval.NewLanguage(
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gval.Full(),
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metricCacheLanguage,
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)
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value, err := gval.Evaluate(newcond, params, language)
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if err != nil {
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cclog.ComponentDebug("MetricRouter", condition, " = ", err.Error())
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return endResult, err
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}
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err = nil
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switch r := value.(type) {
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case bool:
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if r {
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endResult = 1.0
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} else {
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endResult = 0.0
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}
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case float64:
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endResult = r
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case float32:
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endResult = float64(r)
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case int:
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endResult = float64(r)
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case int64:
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endResult = float64(r)
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case int32:
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endResult = float64(r)
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default:
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err = fmt.Errorf("cannot evaluate '%s' to float64", newcond)
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}
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return endResult, err
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}
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func NewAggregator(output chan lp.CCMetric) (MetricAggregator, error) {
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a := new(metricAggregator)
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err := a.Init(output)
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if err != nil {
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return nil, err
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}
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return a, err
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}
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