traefik/pkg/metrics/statsd.go
2021-10-06 17:34:07 +02:00

120 lines
4.8 KiB
Go

package metrics
import (
"context"
"time"
kitlog "github.com/go-kit/kit/log"
"github.com/go-kit/kit/metrics/statsd"
"github.com/traefik/traefik/v2/pkg/log"
"github.com/traefik/traefik/v2/pkg/safe"
"github.com/traefik/traefik/v2/pkg/types"
)
var (
statsdClient *statsd.Statsd
statsdTicker *time.Ticker
)
const (
statsdConfigReloadsName = "config.reload.total"
statsdConfigReloadsFailureName = statsdConfigReloadsName + ".failure"
statsdLastConfigReloadSuccessName = "config.reload.lastSuccessTimestamp"
statsdLastConfigReloadFailureName = "config.reload.lastFailureTimestamp"
statsdTLSCertsNotAfterTimestampName = "tls.certs.notAfterTimestamp"
statsdEntryPointReqsName = "entrypoint.request.total"
statsdEntryPointReqsTLSName = "entrypoint.request.tls.total"
statsdEntryPointReqDurationName = "entrypoint.request.duration"
statsdEntryPointOpenConnsName = "entrypoint.connections.open"
statsdRouterReqsName = "router.request.total"
statsdRouterReqsTLSName = "router.request.tls.total"
statsdRouterReqsDurationName = "router.request.duration"
statsdRouterOpenConnsName = "router.connections.open"
statsdServiceReqsName = "service.request.total"
statsdServiceReqsTLSName = "service.request.tls.total"
statsdServiceReqsDurationName = "service.request.duration"
statsdServiceRetriesTotalName = "service.retries.total"
statsdServiceServerUpName = "service.server.up"
statsdServiceOpenConnsName = "service.connections.open"
)
// RegisterStatsd registers the metrics pusher if this didn't happen yet and creates a statsd Registry instance.
func RegisterStatsd(ctx context.Context, config *types.Statsd) Registry {
// just to be sure there is a prefix defined
if config.Prefix == "" {
config.Prefix = defaultMetricsPrefix
}
statsdClient = statsd.New(config.Prefix+".", kitlog.LoggerFunc(func(keyvals ...interface{}) error {
log.WithoutContext().WithField(log.MetricsProviderName, "statsd").Info(keyvals)
return nil
}))
if statsdTicker == nil {
statsdTicker = initStatsdTicker(ctx, config)
}
registry := &standardRegistry{
configReloadsCounter: statsdClient.NewCounter(statsdConfigReloadsName, 1.0),
configReloadsFailureCounter: statsdClient.NewCounter(statsdConfigReloadsFailureName, 1.0),
lastConfigReloadSuccessGauge: statsdClient.NewGauge(statsdLastConfigReloadSuccessName),
lastConfigReloadFailureGauge: statsdClient.NewGauge(statsdLastConfigReloadFailureName),
tlsCertsNotAfterTimestampGauge: statsdClient.NewGauge(statsdTLSCertsNotAfterTimestampName),
}
if config.AddEntryPointsLabels {
registry.epEnabled = config.AddEntryPointsLabels
registry.entryPointReqsCounter = statsdClient.NewCounter(statsdEntryPointReqsName, 1.0)
registry.entryPointReqsTLSCounter = statsdClient.NewCounter(statsdEntryPointReqsTLSName, 1.0)
registry.entryPointReqDurationHistogram, _ = NewHistogramWithScale(statsdClient.NewTiming(statsdEntryPointReqDurationName, 1.0), time.Millisecond)
registry.entryPointOpenConnsGauge = statsdClient.NewGauge(statsdEntryPointOpenConnsName)
}
if config.AddRoutersLabels {
registry.routerEnabled = config.AddRoutersLabels
registry.routerReqsCounter = statsdClient.NewCounter(statsdRouterReqsName, 1.0)
registry.routerReqsTLSCounter = statsdClient.NewCounter(statsdRouterReqsTLSName, 1.0)
registry.routerReqDurationHistogram, _ = NewHistogramWithScale(statsdClient.NewTiming(statsdRouterReqsDurationName, 1.0), time.Millisecond)
registry.routerOpenConnsGauge = statsdClient.NewGauge(statsdRouterOpenConnsName)
}
if config.AddServicesLabels {
registry.svcEnabled = config.AddServicesLabels
registry.serviceReqsCounter = statsdClient.NewCounter(statsdServiceReqsName, 1.0)
registry.serviceReqsTLSCounter = statsdClient.NewCounter(statsdServiceReqsTLSName, 1.0)
registry.serviceReqDurationHistogram, _ = NewHistogramWithScale(statsdClient.NewTiming(statsdServiceReqsDurationName, 1.0), time.Millisecond)
registry.serviceRetriesCounter = statsdClient.NewCounter(statsdServiceRetriesTotalName, 1.0)
registry.serviceOpenConnsGauge = statsdClient.NewGauge(statsdServiceOpenConnsName)
registry.serviceServerUpGauge = statsdClient.NewGauge(statsdServiceServerUpName)
}
return registry
}
// initStatsdTicker initializes metrics pusher and creates a statsdClient if not created already.
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() {
statsdClient.SendLoop(ctx, 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
}