318 lines
8.6 KiB
Go
318 lines
8.6 KiB
Go
package metrics
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import (
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"strings"
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"sync"
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"time"
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"github.com/go-kit/kit/metrics"
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"github.com/go-kit/kit/metrics/generic"
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)
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const (
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// server meta information.
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pilotConfigPrefix = "config"
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pilotConfigReloadsTotalName = pilotConfigPrefix + "ReloadsTotal"
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pilotConfigReloadsFailuresTotalName = pilotConfigPrefix + "ReloadsFailureTotal"
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pilotConfigLastReloadSuccessName = pilotConfigPrefix + "LastReloadSuccess"
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pilotConfigLastReloadFailureName = pilotConfigPrefix + "LastReloadFailure"
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// entry point.
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pilotEntryPointPrefix = "entrypoint"
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pilotEntryPointReqsTotalName = pilotEntryPointPrefix + "RequestsTotal"
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pilotEntryPointReqsTLSTotalName = pilotEntryPointPrefix + "RequestsTLSTotal"
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pilotEntryPointReqDurationName = pilotEntryPointPrefix + "RequestDurationSeconds"
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pilotEntryPointOpenConnsName = pilotEntryPointPrefix + "OpenConnections"
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// service level.
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pilotServicePrefix = "service"
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pilotServiceReqsTotalName = pilotServicePrefix + "RequestsTotal"
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pilotServiceReqsTLSTotalName = pilotServicePrefix + "RequestsTLSTotal"
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pilotServiceReqDurationName = pilotServicePrefix + "RequestDurationSeconds"
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pilotServiceOpenConnsName = pilotServicePrefix + "OpenConnections"
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pilotServiceRetriesTotalName = pilotServicePrefix + "RetriesTotal"
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pilotServiceServerUpName = pilotServicePrefix + "ServerUp"
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)
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const root = "value"
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// RegisterPilot registers all Pilot metrics.
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func RegisterPilot() *PilotRegistry {
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standardRegistry := &standardRegistry{
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epEnabled: true,
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svcEnabled: true,
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}
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pr := &PilotRegistry{
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standardRegistry: standardRegistry,
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counters: make(map[string]*pilotCounter),
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gauges: make(map[string]*pilotGauge),
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histograms: make(map[string]*pilotHistogram),
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}
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standardRegistry.configReloadsCounter = pr.newCounter(pilotConfigReloadsTotalName)
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standardRegistry.configReloadsFailureCounter = pr.newCounter(pilotConfigReloadsFailuresTotalName)
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standardRegistry.lastConfigReloadSuccessGauge = pr.newGauge(pilotConfigLastReloadSuccessName)
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standardRegistry.lastConfigReloadFailureGauge = pr.newGauge(pilotConfigLastReloadFailureName)
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standardRegistry.entryPointReqsCounter = pr.newCounter(pilotEntryPointReqsTotalName)
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standardRegistry.entryPointReqsTLSCounter = pr.newCounter(pilotEntryPointReqsTLSTotalName)
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standardRegistry.entryPointReqDurationHistogram, _ = NewHistogramWithScale(pr.newHistogram(pilotEntryPointReqDurationName), time.Second)
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standardRegistry.entryPointOpenConnsGauge = pr.newGauge(pilotEntryPointOpenConnsName)
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standardRegistry.serviceReqsCounter = pr.newCounter(pilotServiceReqsTotalName)
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standardRegistry.serviceReqsTLSCounter = pr.newCounter(pilotServiceReqsTLSTotalName)
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standardRegistry.serviceReqDurationHistogram, _ = NewHistogramWithScale(pr.newHistogram(pilotServiceReqDurationName), time.Second)
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standardRegistry.serviceOpenConnsGauge = pr.newGauge(pilotServiceOpenConnsName)
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standardRegistry.serviceRetriesCounter = pr.newCounter(pilotServiceRetriesTotalName)
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standardRegistry.serviceServerUpGauge = pr.newGauge(pilotServiceServerUpName)
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return pr
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}
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// PilotMetric is a representation of a metric.
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type PilotMetric struct {
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Name string `json:"name"`
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Type string `json:"type"`
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Observations map[string]interface{} `json:"observations"`
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}
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type pilotHistogramObservation struct {
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Total float64 `json:"total"`
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Count float64 `json:"count"`
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}
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// PilotRegistry represents the pilots metrics registry.
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type PilotRegistry struct {
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counters map[string]*pilotCounter
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gauges map[string]*pilotGauge
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histograms map[string]*pilotHistogram
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*standardRegistry
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}
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// newCounter register and returns a new pilotCounter.
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func (pr *PilotRegistry) newCounter(name string) *pilotCounter {
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c := newPilotCounter(name)
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pr.counters[name] = c
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return c
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}
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// newGauge register and returns a new pilotGauge.
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func (pr *PilotRegistry) newGauge(name string) *pilotGauge {
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g := newPilotGauge(name)
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pr.gauges[name] = g
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return g
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}
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// newHistogram register and returns a new pilotHistogram.
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func (pr *PilotRegistry) newHistogram(name string) *pilotHistogram {
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h := newPilotHistogram(name)
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pr.histograms[name] = h
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return h
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}
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// Data exports the metrics: metrics name -> labels -> values.
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func (pr *PilotRegistry) Data() []PilotMetric {
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var pilotMetrics []PilotMetric
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for name, counter := range pr.counters {
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pilotMetric := PilotMetric{
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Name: name,
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Type: "COUNTER",
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Observations: make(map[string]interface{}),
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}
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pilotMetrics = append(pilotMetrics, pilotMetric)
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counter.counters.Range(func(key, value interface{}) bool {
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labels := key.(string)
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pc := value.(*pilotCounter)
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if labels == "" {
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labels = root
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}
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if labels == root || len(pc.c.LabelValues())%2 == 0 {
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pilotMetric.Observations[labels] = pc.c.Value()
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}
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return true
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})
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}
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for name, gauge := range pr.gauges {
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pilotMetric := PilotMetric{
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Name: name,
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Type: "GAUGE",
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Observations: make(map[string]interface{}),
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}
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pilotMetrics = append(pilotMetrics, pilotMetric)
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gauge.gauges.Range(func(key, value interface{}) bool {
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labels := key.(string)
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pg := value.(*pilotGauge)
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if labels == "" {
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labels = root
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}
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if labels == root || len(pg.g.LabelValues())%2 == 0 {
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pilotMetric.Observations[labels] = pg.g.Value()
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}
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return true
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})
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}
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for name, histogram := range pr.histograms {
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pilotMetric := PilotMetric{
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Name: name,
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Type: "HISTOGRAM",
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Observations: make(map[string]interface{}),
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}
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pilotMetrics = append(pilotMetrics, pilotMetric)
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histogram.histograms.Range(func(key, value interface{}) bool {
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labels := key.(string)
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ph := value.(*pilotHistogram)
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if labels == "" {
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labels = root
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}
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if labels == root || len(ph.labels)%2 == 0 {
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pilotMetric.Observations[labels] = &pilotHistogramObservation{
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Total: ph.total.Value(),
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Count: ph.count.Value(),
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}
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}
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return true
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})
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}
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return pilotMetrics
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}
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type pilotCounter struct {
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c *generic.Counter
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counters *sync.Map
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}
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func newPilotCounter(name string) *pilotCounter {
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return &pilotCounter{
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c: generic.NewCounter(name),
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counters: &sync.Map{},
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}
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}
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// With returns a new pilotCounter with the given labels.
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func (c *pilotCounter) With(labels ...string) metrics.Counter {
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newCounter := c.c.With(labels...).(*generic.Counter)
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newCounter.ValueReset()
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return &pilotCounter{
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c: newCounter,
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counters: c.counters,
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}
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}
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// Add adds the given delta to the counter.
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func (c *pilotCounter) Add(delta float64) {
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labelsKey := strings.Join(c.c.LabelValues(), ",")
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pc, _ := c.counters.LoadOrStore(labelsKey, c)
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pc.(*pilotCounter).c.Add(delta)
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}
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type pilotGauge struct {
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g *generic.Gauge
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gauges *sync.Map
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}
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func newPilotGauge(name string) *pilotGauge {
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return &pilotGauge{
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g: generic.NewGauge(name),
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gauges: &sync.Map{},
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}
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}
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// With returns a new pilotGauge with the given labels.
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func (g *pilotGauge) With(labels ...string) metrics.Gauge {
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newGauge := g.g.With(labels...).(*generic.Gauge)
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newGauge.Set(0)
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return &pilotGauge{
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g: newGauge,
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gauges: g.gauges,
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}
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}
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// Set sets the given value to the gauge.
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func (g *pilotGauge) Set(value float64) {
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labelsKey := strings.Join(g.g.LabelValues(), ",")
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pg, _ := g.gauges.LoadOrStore(labelsKey, g)
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pg.(*pilotGauge).g.Set(value)
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}
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// Add adds the given delta to the gauge.
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func (g *pilotGauge) Add(delta float64) {
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labelsKey := strings.Join(g.g.LabelValues(), ",")
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pg, _ := g.gauges.LoadOrStore(labelsKey, g)
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pg.(*pilotGauge).g.Add(delta)
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}
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type pilotHistogram struct {
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name string
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labels []string
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count *generic.Counter
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total *generic.Counter
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histograms *sync.Map
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}
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func newPilotHistogram(name string) *pilotHistogram {
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return &pilotHistogram{
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name: name,
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labels: make([]string, 0),
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count: &generic.Counter{},
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total: &generic.Counter{},
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histograms: &sync.Map{},
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}
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}
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// With returns a new pilotHistogram with the given labels.
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func (h *pilotHistogram) With(labels ...string) metrics.Histogram {
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var newLabels []string
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newLabels = append(newLabels, h.labels...)
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newLabels = append(newLabels, labels...)
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return &pilotHistogram{
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name: h.name,
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labels: newLabels,
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count: &generic.Counter{},
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total: &generic.Counter{},
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histograms: h.histograms,
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}
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}
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// Observe records a new value into the histogram.
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func (h *pilotHistogram) Observe(value float64) {
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labelsKey := strings.Join(h.labels, ",")
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ph, _ := h.histograms.LoadOrStore(labelsKey, h)
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pHisto := ph.(*pilotHistogram)
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pHisto.count.Add(1)
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pHisto.total.Add(value)
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}
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