traefik/metrics/influxdb.go

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package metrics
import (
"bytes"
"time"
"github.com/containous/traefik/log"
"github.com/containous/traefik/safe"
"github.com/containous/traefik/types"
kitlog "github.com/go-kit/kit/log"
"github.com/go-kit/kit/metrics/influx"
influxdb "github.com/influxdata/influxdb/client/v2"
)
var influxDBClient = influx.New(map[string]string{}, influxdb.BatchPointsConfig{}, kitlog.LoggerFunc(func(keyvals ...interface{}) error {
log.Info(keyvals)
return nil
}))
type influxDBWriter struct {
buf bytes.Buffer
config *types.InfluxDB
}
var influxDBTicker *time.Ticker
const (
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influxDBMetricsBackendReqsName = "traefik.backend.requests.total"
influxDBMetricsBackendLatencyName = "traefik.backend.request.duration"
influxDBRetriesTotalName = "traefik.backend.retries.total"
influxDBConfigReloadsName = "traefik.config.reload.total"
influxDBConfigReloadsFailureName = influxDBConfigReloadsName + ".failure"
influxDBLastConfigReloadSuccessName = "traefik.config.reload.lastSuccessTimestamp"
influxDBLastConfigReloadFailureName = "traefik.config.reload.lastFailureTimestamp"
influxDBEntrypointReqsName = "traefik.entrypoint.requests.total"
influxDBEntrypointReqDurationName = "traefik.entrypoint.request.duration"
influxDBEntrypointOpenConnsName = "traefik.entrypoint.connections.open"
influxDBOpenConnsName = "traefik.backend.connections.open"
influxDBServerUpName = "traefik.backend.server.up"
)
// RegisterInfluxDB registers the metrics pusher if this didn't happen yet and creates a InfluxDB Registry instance.
func RegisterInfluxDB(config *types.InfluxDB) Registry {
if influxDBTicker == nil {
influxDBTicker = initInfluxDBTicker(config)
}
return &standardRegistry{
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enabled: true,
configReloadsCounter: influxDBClient.NewCounter(influxDBConfigReloadsName),
configReloadsFailureCounter: influxDBClient.NewCounter(influxDBConfigReloadsFailureName),
lastConfigReloadSuccessGauge: influxDBClient.NewGauge(influxDBLastConfigReloadSuccessName),
lastConfigReloadFailureGauge: influxDBClient.NewGauge(influxDBLastConfigReloadFailureName),
entrypointReqsCounter: influxDBClient.NewCounter(influxDBEntrypointReqsName),
entrypointReqDurationHistogram: influxDBClient.NewHistogram(influxDBEntrypointReqDurationName),
entrypointOpenConnsGauge: influxDBClient.NewGauge(influxDBEntrypointOpenConnsName),
backendReqsCounter: influxDBClient.NewCounter(influxDBMetricsBackendReqsName),
backendReqDurationHistogram: influxDBClient.NewHistogram(influxDBMetricsBackendLatencyName),
backendRetriesCounter: influxDBClient.NewCounter(influxDBRetriesTotalName),
backendOpenConnsGauge: influxDBClient.NewGauge(influxDBOpenConnsName),
backendServerUpGauge: influxDBClient.NewGauge(influxDBServerUpName),
}
}
// initInfluxDBTicker initializes metrics pusher and creates a influxDBClient if not created already
func initInfluxDBTicker(config *types.InfluxDB) *time.Ticker {
pushInterval, err := time.ParseDuration(config.PushInterval)
if err != nil {
log.Warnf("Unable to parse %s into pushInterval, using 10s as default value", config.PushInterval)
pushInterval = 10 * time.Second
}
report := time.NewTicker(pushInterval)
safe.Go(func() {
var buf bytes.Buffer
influxDBClient.WriteLoop(report.C, &influxDBWriter{buf: buf, config: config})
})
return report
}
// StopInfluxDB stops internal influxDBTicker which controls the pushing of metrics to InfluxDB Agent and resets it to `nil`
func StopInfluxDB() {
if influxDBTicker != nil {
influxDBTicker.Stop()
}
influxDBTicker = nil
}
func (w *influxDBWriter) Write(bp influxdb.BatchPoints) error {
c, err := influxdb.NewUDPClient(influxdb.UDPConfig{
Addr: w.config.Address,
})
if err != nil {
return err
}
defer c.Close()
return c.Write(bp)
}