metrics

Documentation

Index

• func OnConfigurationUpdate()
• func StopDatadog()
• func StopInfluxDB()
• func StopStatsd()
• type PrometheusHandler
  • func (h PrometheusHandler) AddRoutes(router *mux.Router)
• type Registry
  • func NewMultiRegistry(registries []Registry) Registry
  • func NewVoidRegistry() Registry
  • func RegisterDatadog(config *types.Datadog) Registry
  • func RegisterInfluxDB(config *types.InfluxDB) Registry
  • func RegisterPrometheus(config *types.Prometheus) Registry
  • func RegisterStatsd(config *types.Statsd) Registry

Functions

func OnConfigurationUpdate

func OnConfigurationUpdate()

OnConfigurationUpdate increases the current generation of the prometheus state.

func StopDatadog

func StopDatadog()

StopDatadog stops internal datadogTicker which controls the pushing of metrics to DD Agent and resets it to `nil`.

func StopInfluxDB

func StopInfluxDB()

StopInfluxDB stops internal influxDBTicker which controls the pushing of metrics to InfluxDB Agent and resets it to `nil`

func StopStatsd

func StopStatsd()

StopStatsd stops internal statsdTicker which controls the pushing of metrics to StatsD Agent and resets it to `nil`

Types

type PrometheusHandler

type PrometheusHandler struct{}

PrometheusHandler exposes Prometheus routes.

func (PrometheusHandler) AddRoutes

func (h PrometheusHandler) AddRoutes(router *mux.Router)

AddRoutes adds Prometheus routes on a router.

type Registry

type Registry interface {
	// IsEnabled shows whether metrics instrumentation is enabled.
	IsEnabled() bool
	// server metrics
	ConfigReloadsCounter() metrics.Counter
	ConfigReloadsFailureCounter() metrics.Counter
	LastConfigReloadSuccessGauge() metrics.Gauge
	LastConfigReloadFailureGauge() metrics.Gauge

	// entry point metrics
	EntrypointReqsCounter() metrics.Counter
	EntrypointReqDurationHistogram() metrics.Histogram
	EntrypointOpenConnsGauge() metrics.Gauge

	// backend metrics
	BackendReqsCounter() metrics.Counter
	BackendReqDurationHistogram() metrics.Histogram
	BackendOpenConnsGauge() metrics.Gauge
	BackendRetriesCounter() metrics.Counter
	BackendServerUpGauge() metrics.Gauge
}

Registry has to implemented by any system that wants to monitor and expose metrics.

func NewMultiRegistry

func NewMultiRegistry(registries []Registry) Registry

NewMultiRegistry is an implementation of metrics.Registry that wraps multiple registries. It handles the case when a registry hasn't registered some metric and returns nil. This allows for feature imparity between the different metric implementations.

func NewVoidRegistry

func NewVoidRegistry() Registry

NewVoidRegistry is a noop implementation of metrics.Registry. It is used to avoid nil checking in components that do metric collections.

func RegisterDatadog

func RegisterDatadog(config *types.Datadog) Registry

RegisterDatadog registers the metrics pusher if this didn't happen yet and creates a datadog Registry instance.

func RegisterInfluxDB

func RegisterInfluxDB(config *types.InfluxDB) Registry

RegisterInfluxDB registers the metrics pusher if this didn't happen yet and creates a InfluxDB Registry instance.

func RegisterPrometheus

func RegisterPrometheus(config *types.Prometheus) Registry

RegisterPrometheus registers all Prometheus metrics. It must be called only once and failing to register the metrics will lead to a panic.

func RegisterStatsd

func RegisterStatsd(config *types.Statsd) Registry

RegisterStatsd registers the metrics pusher if this didn't happen yet and creates a statsd Registry instance.