mirror of https://github.com/k3s-io/k3s
56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
/*
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Copyright 2018 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
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import (
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"github.com/prometheus/client_golang/prometheus"
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"k8s.io/client-go/tools/leaderelection"
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)
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// Package prometheus sets the workqueue DefaultMetricsFactory to produce
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// prometheus metrics. To use this package, you just have to import it.
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func init() {
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leaderelection.SetProvider(prometheusMetricsProvider{})
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}
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type prometheusMetricsProvider struct{}
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func (prometheusMetricsProvider) NewLeaderMetric() leaderelection.SwitchMetric {
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leaderGauge := prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Name: "leader_election_master_status",
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Help: "Gauge of if the reporting system is master of the relevant lease, 0 indicates backup, 1 indicates master. 'name' is the string used to identify the lease. Please make sure to group by name.",
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},
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[]string{"name"},
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)
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prometheus.Register(leaderGauge)
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return &switchAdapter{gauge: leaderGauge}
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}
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type switchAdapter struct {
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gauge *prometheus.GaugeVec
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}
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func (s *switchAdapter) On(name string) {
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s.gauge.WithLabelValues(name).Set(1.0)
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}
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func (s *switchAdapter) Off(name string) {
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s.gauge.WithLabelValues(name).Set(0.0)
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}
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