mirror of https://github.com/k3s-io/k3s
56 lines
1.6 KiB
Go
56 lines
1.6 KiB
Go
|
/*
|
||
|
|
Copyright 2018 The Kubernetes Authors.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package prometheus
|
||
|
|
|
||
|
|
import (
|
||
|
|
"github.com/prometheus/client_golang/prometheus"
|
||
|
|
"k8s.io/client-go/tools/leaderelection"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Package prometheus sets the workqueue DefaultMetricsFactory to produce
|
||
|
|
// prometheus metrics. To use this package, you just have to import it.
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
leaderelection.SetProvider(prometheusMetricsProvider{})
|
||
|
|
}
|
||
|
|
|
||
|
|
type prometheusMetricsProvider struct{}
|
||
|
|
|
||
|
|
func (prometheusMetricsProvider) NewLeaderMetric() leaderelection.SwitchMetric {
|
||
|
|
leaderGauge := prometheus.NewGaugeVec(
|
||
|
|
prometheus.GaugeOpts{
|
||
|
|
Name: "leader_election_master_status",
|
||
|
|
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.",
|
||
|
|
},
|
||
|
|
[]string{"name"},
|
||
|
|
)
|
||
|
|
prometheus.Register(leaderGauge)
|
||
|
|
return &switchAdapter{gauge: leaderGauge}
|
||
|
|
}
|
||
|
|
|
||
|
|
type switchAdapter struct {
|
||
|
|
gauge *prometheus.GaugeVec
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *switchAdapter) On(name string) {
|
||
|
|
s.gauge.WithLabelValues(name).Set(1.0)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *switchAdapter) Off(name string) {
|
||
|
|
s.gauge.WithLabelValues(name).Set(0.0)
|
||
|
|
}
|