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41 lines
1.2 KiB
Go
41 lines
1.2 KiB
Go
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package metrics
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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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// This file is copied and adapted from k8s.io/component-base/metrics/prometheus/clientgo/leaderelection
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// which registers metrics to the k8s legacy Registry. We require very
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// similar functionality, but must register metrics to a different Registry.
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var (
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leaderGauge = prometheus.NewGaugeVec(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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}, []string{"name"})
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)
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func init() {
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Registry.MustRegister(leaderGauge)
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leaderelection.SetProvider(leaderelectionMetricsProvider{})
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}
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type leaderelectionMetricsProvider struct{}
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func (leaderelectionMetricsProvider) NewLeaderMetric() leaderelection.SwitchMetric {
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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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