traefik/pkg/metrics/statsd.go

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package metrics
import (
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"context"
"time"
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"github.com/containous/traefik/v2/pkg/log"
"github.com/containous/traefik/v2/pkg/safe"
"github.com/containous/traefik/v2/pkg/types"
kitlog "github.com/go-kit/kit/log"
"github.com/go-kit/kit/metrics/statsd"
)
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var (
statsdClient *statsd.Statsd
statsdTicker *time.Ticker
)
const (
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statsdMetricsServiceReqsName = "service.request.total"
statsdMetricsServiceLatencyName = "service.request.duration"
statsdRetriesTotalName = "service.retries.total"
statsdConfigReloadsName = "config.reload.total"
statsdConfigReloadsFailureName = statsdConfigReloadsName + ".failure"
statsdLastConfigReloadSuccessName = "config.reload.lastSuccessTimestamp"
statsdLastConfigReloadFailureName = "config.reload.lastFailureTimestamp"
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statsdEntryPointReqsName = "entrypoint.request.total"
statsdEntryPointReqDurationName = "entrypoint.request.duration"
statsdEntryPointOpenConnsName = "entrypoint.connections.open"
statsdOpenConnsName = "service.connections.open"
statsdServerUpName = "service.server.up"
)
// RegisterStatsd registers the metrics pusher if this didn't happen yet and creates a statsd Registry instance.
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func RegisterStatsd(ctx context.Context, config *types.Statsd) Registry {
// just to be sure there is a prefix defined
if config.Prefix == "" {
config.Prefix = "traefik"
}
statsdClient = statsd.New(config.Prefix+".", kitlog.LoggerFunc(func(keyvals ...interface{}) error {
log.WithoutContext().WithField(log.MetricsProviderName, "statsd").Info(keyvals)
return nil
}))
if statsdTicker == nil {
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statsdTicker = initStatsdTicker(ctx, config)
}
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registry := &standardRegistry{
configReloadsCounter: statsdClient.NewCounter(statsdConfigReloadsName, 1.0),
configReloadsFailureCounter: statsdClient.NewCounter(statsdConfigReloadsFailureName, 1.0),
lastConfigReloadSuccessGauge: statsdClient.NewGauge(statsdLastConfigReloadSuccessName),
lastConfigReloadFailureGauge: statsdClient.NewGauge(statsdLastConfigReloadFailureName),
}
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if config.AddEntryPointsLabels {
registry.epEnabled = config.AddEntryPointsLabels
registry.entryPointReqsCounter = statsdClient.NewCounter(statsdEntryPointReqsName, 1.0)
registry.entryPointReqDurationHistogram, _ = NewHistogramWithScale(statsdClient.NewTiming(statsdEntryPointReqDurationName, 1.0), time.Millisecond)
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registry.entryPointOpenConnsGauge = statsdClient.NewGauge(statsdEntryPointOpenConnsName)
}
if config.AddServicesLabels {
registry.svcEnabled = config.AddServicesLabels
registry.serviceReqsCounter = statsdClient.NewCounter(statsdMetricsServiceReqsName, 1.0)
registry.serviceReqDurationHistogram, _ = NewHistogramWithScale(statsdClient.NewTiming(statsdMetricsServiceLatencyName, 1.0), time.Millisecond)
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registry.serviceRetriesCounter = statsdClient.NewCounter(statsdRetriesTotalName, 1.0)
registry.serviceOpenConnsGauge = statsdClient.NewGauge(statsdOpenConnsName)
registry.serviceServerUpGauge = statsdClient.NewGauge(statsdServerUpName)
}
return registry
}
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// initStatsdTicker initializes metrics pusher and creates a statsdClient if not created already.
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func initStatsdTicker(ctx context.Context, config *types.Statsd) *time.Ticker {
address := config.Address
if len(address) == 0 {
address = "localhost:8125"
}
report := time.NewTicker(time.Duration(config.PushInterval))
safe.Go(func() {
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statsdClient.SendLoop(ctx, report.C, "udp", address)
})
return report
}
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// StopStatsd stops internal statsdTicker which controls the pushing of metrics to StatsD Agent and resets it to `nil`.
func StopStatsd() {
if statsdTicker != nil {
statsdTicker.Stop()
}
statsdTicker = nil
}