mirror of https://github.com/k3s-io/k3s
63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
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/*
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Copyright 2014 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 routes
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import (
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"io"
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"net/http"
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apimetrics "k8s.io/apiserver/pkg/endpoints/metrics"
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"k8s.io/apiserver/pkg/server/mux"
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etcdmetrics "k8s.io/apiserver/pkg/storage/etcd/metrics"
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"github.com/prometheus/client_golang/prometheus"
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)
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// DefaultMetrics installs the default prometheus metrics handler
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type DefaultMetrics struct{}
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// Install adds the DefaultMetrics handler
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func (m DefaultMetrics) Install(c *mux.PathRecorderMux) {
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register()
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c.Handle("/metrics", prometheus.Handler())
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}
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// MetricsWithReset install the prometheus metrics handler extended with support for the DELETE method
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// which resets the metrics.
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type MetricsWithReset struct{}
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// Install adds the MetricsWithReset handler
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func (m MetricsWithReset) Install(c *mux.PathRecorderMux) {
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register()
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defaultMetricsHandler := prometheus.Handler().ServeHTTP
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c.HandleFunc("/metrics", func(w http.ResponseWriter, req *http.Request) {
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if req.Method == "DELETE" {
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apimetrics.Reset()
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etcdmetrics.Reset()
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io.WriteString(w, "metrics reset\n")
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return
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}
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defaultMetricsHandler(w, req)
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})
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}
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// register apiserver and etcd metrics
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func register() {
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apimetrics.Register()
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etcdmetrics.Register()
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}
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