mirror of https://github.com/k3s-io/k3s
126 lines
2.8 KiB
Go
126 lines
2.8 KiB
Go
/*
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Copyright 2019 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 cache
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import (
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"time"
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"k8s.io/component-base/metrics"
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"k8s.io/component-base/metrics/legacyregistry"
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)
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var (
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requestLatency = metrics.NewHistogramVec(
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&metrics.HistogramOpts{
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Namespace: "authentication",
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Subsystem: "token_cache",
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Name: "request_duration_seconds",
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StabilityLevel: metrics.ALPHA,
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},
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[]string{"status"},
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)
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requestCount = metrics.NewCounterVec(
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&metrics.CounterOpts{
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Namespace: "authentication",
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Subsystem: "token_cache",
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Name: "request_total",
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StabilityLevel: metrics.ALPHA,
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},
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[]string{"status"},
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)
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fetchCount = metrics.NewCounterVec(
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&metrics.CounterOpts{
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Namespace: "authentication",
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Subsystem: "token_cache",
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Name: "fetch_total",
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StabilityLevel: metrics.ALPHA,
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},
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[]string{"status"},
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)
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activeFetchCount = metrics.NewGaugeVec(
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&metrics.GaugeOpts{
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Namespace: "authentication",
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Subsystem: "token_cache",
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Name: "active_fetch_count",
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StabilityLevel: metrics.ALPHA,
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},
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[]string{"status"},
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)
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)
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func init() {
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legacyregistry.MustRegister(
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requestLatency,
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requestCount,
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fetchCount,
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activeFetchCount,
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)
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}
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const (
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hitTag = "hit"
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missTag = "miss"
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fetchFailedTag = "error"
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fetchOkTag = "ok"
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fetchInFlightTag = "in_flight"
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fetchBlockedTag = "blocked"
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)
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type statsCollector struct{}
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var stats = statsCollector{}
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func (statsCollector) authenticating() func(hit bool) {
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start := time.Now()
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return func(hit bool) {
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var tag string
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if hit {
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tag = hitTag
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} else {
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tag = missTag
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}
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latency := time.Since(start)
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requestCount.WithLabelValues(tag).Inc()
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requestLatency.WithLabelValues(tag).Observe(float64(latency.Milliseconds()) / 1000)
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}
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}
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func (statsCollector) blocking() func() {
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activeFetchCount.WithLabelValues(fetchBlockedTag).Inc()
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return activeFetchCount.WithLabelValues(fetchBlockedTag).Dec
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}
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func (statsCollector) fetching() func(ok bool) {
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activeFetchCount.WithLabelValues(fetchInFlightTag).Inc()
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return func(ok bool) {
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var tag string
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if ok {
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tag = fetchOkTag
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} else {
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tag = fetchFailedTag
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}
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fetchCount.WithLabelValues(tag).Inc()
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activeFetchCount.WithLabelValues(fetchInFlightTag).Dec()
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}
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}
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