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/pkg/log"
"github.com/containous/traefik/pkg/safe"
"github.com/containous/traefik/pkg/types"
kitlog "github.com/go-kit/kit/log"
"github.com/go-kit/kit/metrics/statsd"
)
var statsdClient = statsd.New("traefik.", kitlog.LoggerFunc(func(keyvals ...interface{}) error {
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log.WithoutContext().WithField(log.MetricsProviderName, "statsd").Info(keyvals)
return nil
}))
var statsdTicker *time.Ticker
const (
statsdMetricsBackendReqsName = "backend.request.total"
statsdMetricsBackendLatencyName = "backend.request.duration"
statsdRetriesTotalName = "backend.retries.total"
statsdConfigReloadsName = "config.reload.total"
statsdConfigReloadsFailureName = statsdConfigReloadsName + ".failure"
statsdLastConfigReloadSuccessName = "config.reload.lastSuccessTimestamp"
statsdLastConfigReloadFailureName = "config.reload.lastFailureTimestamp"
statsdEntrypointReqsName = "entrypoint.request.total"
statsdEntrypointReqDurationName = "entrypoint.request.duration"
statsdEntrypointOpenConnsName = "entrypoint.connections.open"
statsdOpenConnsName = "backend.connections.open"
statsdServerUpName = "backend.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 {
if statsdTicker == nil {
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statsdTicker = initStatsdTicker(ctx, config)
}
return &standardRegistry{
enabled: true,
configReloadsCounter: statsdClient.NewCounter(statsdConfigReloadsName, 1.0),
configReloadsFailureCounter: statsdClient.NewCounter(statsdConfigReloadsFailureName, 1.0),
lastConfigReloadSuccessGauge: statsdClient.NewGauge(statsdLastConfigReloadSuccessName),
lastConfigReloadFailureGauge: statsdClient.NewGauge(statsdLastConfigReloadFailureName),
entrypointReqsCounter: statsdClient.NewCounter(statsdEntrypointReqsName, 1.0),
entrypointReqDurationHistogram: statsdClient.NewTiming(statsdEntrypointReqDurationName, 1.0),
entrypointOpenConnsGauge: statsdClient.NewGauge(statsdEntrypointOpenConnsName),
backendReqsCounter: statsdClient.NewCounter(statsdMetricsBackendReqsName, 1.0),
backendReqDurationHistogram: statsdClient.NewTiming(statsdMetricsBackendLatencyName, 1.0),
backendRetriesCounter: statsdClient.NewCounter(statsdRetriesTotalName, 1.0),
backendOpenConnsGauge: statsdClient.NewGauge(statsdOpenConnsName),
backendServerUpGauge: statsdClient.NewGauge(statsdServerUpName),
}
}
// 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"
}
pushInterval, err := time.ParseDuration(config.PushInterval)
if err != nil {
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log.FromContext(ctx).Warnf("Unable to parse %s from config.PushInterval: using 10s as the default value", config.PushInterval)
pushInterval = 10 * time.Second
}
report := time.NewTicker(pushInterval)
safe.Go(func() {
statsdClient.SendLoop(report.C, "udp", address)
})
return report
}
// 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
}