mirror of https://github.com/k3s-io/k3s
129 lines
4.3 KiB
Go
129 lines
4.3 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package prometheus sets the cache DefaultMetricsFactory to produce
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// prometheus metrics. To use this package, you just have to import it.
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package prometheus
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import (
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"k8s.io/client-go/tools/cache"
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"github.com/prometheus/client_golang/prometheus"
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)
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const reflectorSubsystem = "reflector"
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var (
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listsTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
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Subsystem: reflectorSubsystem,
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Name: "lists_total",
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Help: "Total number of API lists done by the reflectors",
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}, []string{"name"})
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listsDuration = prometheus.NewSummaryVec(prometheus.SummaryOpts{
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Subsystem: reflectorSubsystem,
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Name: "list_duration_seconds",
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Help: "How long an API list takes to return and decode for the reflectors",
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}, []string{"name"})
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itemsPerList = prometheus.NewSummaryVec(prometheus.SummaryOpts{
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Subsystem: reflectorSubsystem,
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Name: "items_per_list",
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Help: "How many items an API list returns to the reflectors",
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}, []string{"name"})
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watchesTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
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Subsystem: reflectorSubsystem,
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Name: "watches_total",
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Help: "Total number of API watches done by the reflectors",
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}, []string{"name"})
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shortWatchesTotal = prometheus.NewCounterVec(prometheus.CounterOpts{
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Subsystem: reflectorSubsystem,
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Name: "short_watches_total",
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Help: "Total number of short API watches done by the reflectors",
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}, []string{"name"})
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watchDuration = prometheus.NewSummaryVec(prometheus.SummaryOpts{
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Subsystem: reflectorSubsystem,
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Name: "watch_duration_seconds",
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Help: "How long an API watch takes to return and decode for the reflectors",
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}, []string{"name"})
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itemsPerWatch = prometheus.NewSummaryVec(prometheus.SummaryOpts{
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Subsystem: reflectorSubsystem,
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Name: "items_per_watch",
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Help: "How many items an API watch returns to the reflectors",
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}, []string{"name"})
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lastResourceVersion = prometheus.NewGaugeVec(prometheus.GaugeOpts{
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Subsystem: reflectorSubsystem,
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Name: "last_resource_version",
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Help: "Last resource version seen for the reflectors",
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}, []string{"name"})
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)
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func init() {
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prometheus.MustRegister(listsTotal)
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prometheus.MustRegister(listsDuration)
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prometheus.MustRegister(itemsPerList)
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prometheus.MustRegister(watchesTotal)
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prometheus.MustRegister(shortWatchesTotal)
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prometheus.MustRegister(watchDuration)
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prometheus.MustRegister(itemsPerWatch)
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prometheus.MustRegister(lastResourceVersion)
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cache.SetReflectorMetricsProvider(prometheusMetricsProvider{})
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}
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type prometheusMetricsProvider struct{}
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func (prometheusMetricsProvider) NewListsMetric(name string) cache.CounterMetric {
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return listsTotal.WithLabelValues(name)
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}
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// use summary to get averages and percentiles
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func (prometheusMetricsProvider) NewListDurationMetric(name string) cache.SummaryMetric {
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return listsDuration.WithLabelValues(name)
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}
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// use summary to get averages and percentiles
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func (prometheusMetricsProvider) NewItemsInListMetric(name string) cache.SummaryMetric {
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return itemsPerList.WithLabelValues(name)
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}
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func (prometheusMetricsProvider) NewWatchesMetric(name string) cache.CounterMetric {
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return watchesTotal.WithLabelValues(name)
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}
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func (prometheusMetricsProvider) NewShortWatchesMetric(name string) cache.CounterMetric {
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return shortWatchesTotal.WithLabelValues(name)
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}
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// use summary to get averages and percentiles
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func (prometheusMetricsProvider) NewWatchDurationMetric(name string) cache.SummaryMetric {
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return watchDuration.WithLabelValues(name)
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}
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// use summary to get averages and percentiles
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func (prometheusMetricsProvider) NewItemsInWatchMetric(name string) cache.SummaryMetric {
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return itemsPerWatch.WithLabelValues(name)
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}
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func (prometheusMetricsProvider) NewLastResourceVersionMetric(name string) cache.GaugeMetric {
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return lastResourceVersion.WithLabelValues(name)
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}
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