metrics

Documentation

Overview

Package metrics defines telemetry primitives to be used across components. it uses the prometheus format.

Index

• Constants
• func StartMetricsServer(metricsPort int)
• func StartPushingMetrics(url string, periodSec int, nodeID, networkID string)
• type Cache
• type Counter
  • func NewCounter(name, subsystem, help string, labels []string) Counter
• type Gauge
  • func NewGauge(name, subsystem, help string, labels []string) Gauge
• type Histogram
  • func NewHistogram(name, subsystem, help string, labels []string) Histogram
  • func NewSummary(name, subsystem, help string, labels []string, objectives map[float64]float64) Histogram
• type MeteredCache
  • func NewMeteredCache(cache Cache, subsystem, name, help string, labels []string) *MeteredCache
  • func (m *MeteredCache) Add(key, value interface{}) bool
  • func (m *MeteredCache) Get(key interface{}) (value interface{}, ok bool)
• type Summary

Constants

const (
	// Namespace is the basic namespace where all metrics are defined under.
	Namespace = "spacemesh"
	// ResultLabel makes a consistent name for results.
	ResultLabel = "result"
)

Functions

func StartMetricsServer

func StartMetricsServer(metricsPort int)

StartMetricsServer begins listening and supplying metrics on localhost:`metricsPort`/metrics

func StartPushingMetrics

func StartPushingMetrics(url string, periodSec int, nodeID, networkID string)

StartPushingMetrics begins pushing metrics to the url specified by the --metrics-push flag with period specified by the --metrics-push-period flag

Types

type Cache

type Cache interface {
	Add(key, value interface{}) (evicted bool)
	Get(key interface{}) (value interface{}, ok bool)
}

Cache is a basic cache interface that we can wrap to meter.

type Counter

type Counter metrics.Counter

Counter is a metric type used to represent a monotonically increased/decreased numeric value.

func NewCounter

func NewCounter(name, subsystem, help string, labels []string) Counter

NewCounter creates a Counter metrics under the global namespace returns nop if metrics are disabled.

type Gauge

type Gauge metrics.Gauge

Gauge is a metric type used to represent a numeric value

func NewGauge

func NewGauge(name, subsystem, help string, labels []string) Gauge

NewGauge creates a Gauge metrics under the global namespace returns nop if metrics are disabled.

type Histogram

type Histogram metrics.Histogram

Histogram is a metric type used to count multiple observations in buckets.

func NewHistogram

func NewHistogram(name, subsystem, help string, labels []string) Histogram

NewHistogram creates a Histogram metrics under the global namespace returns nop if metrics are disabled.

func NewSummary

func NewSummary(name, subsystem, help string, labels []string, objectives map[float64]float64) Histogram

NewSummary creates a Summary metrics under the global namespace returns nop if metrics are disabled.

type MeteredCache

type MeteredCache struct {
	// contains filtered or unexported fields
}

MeteredCache is a wrapper around a cache that monitors size, hits and misses.

func NewMeteredCache

func NewMeteredCache(cache Cache, subsystem, name, help string, labels []string) *MeteredCache

NewMeteredCache wraps cache with metrics are returns a monitored cache.

func (*MeteredCache) Add

func (m *MeteredCache) Add(key, value interface{}) bool

Add adds a key-value to the cache and increases the counter if needed.

func (*MeteredCache) Get

func (m *MeteredCache) Get(key interface{}) (value interface{}, ok bool)

Get returns a value from the cache and counts a hit or a miss.

type Summary

type Summary prmkit.Summary

Summary is a metric type used to sum up multiple observations over time.