/
leaderelection.go
62 lines (58 loc) · 1.74 KB
/
leaderelection.go
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/*
* Copyright 2021 The Multicluster-Scheduler 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 leaderelection
import (
"context"
"os"
"strconv"
"time"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/leaderelection"
"k8s.io/client-go/tools/leaderelection/resourcelock"
)
func Run(ctx context.Context, ns, name string, k kubernetes.Interface, onStartedLeading func(ctx context.Context)) {
id := os.Getenv("POD_NAME")
if id == "" {
// while remote-debugging, we may not have a pod name
id = strconv.Itoa(os.Getpid())
}
leaderelection.RunOrDie(ctx, leaderelection.LeaderElectionConfig{
Lock: &resourcelock.LeaseLock{
LeaseMeta: metav1.ObjectMeta{
Namespace: ns,
Name: name,
},
Client: k.CoordinationV1(),
LockConfig: resourcelock.ResourceLockConfig{
Identity: id,
EventRecorder: nil, // TODO...
},
},
LeaseDuration: 15 * time.Second,
RenewDeadline: 10 * time.Second,
RetryPeriod: 2 * time.Second,
Callbacks: leaderelection.LeaderCallbacks{
OnStartedLeading: onStartedLeading,
OnStoppedLeading: func() {
// TODO log
},
},
WatchDog: nil, // TODO...
ReleaseOnCancel: true,
Name: name,
})
}