mirror of
https://github.com/ceph/ceph-csi.git
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83559144b1
updated kubernetes packages to latest release. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
136 lines
4.1 KiB
Go
136 lines
4.1 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 resourcelock
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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coordinationv1 "k8s.io/api/coordination/v1"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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coordinationv1client "k8s.io/client-go/kubernetes/typed/coordination/v1"
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)
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type LeaseLock struct {
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// LeaseMeta should contain a Name and a Namespace of a
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// LeaseMeta object that the LeaderElector will attempt to lead.
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LeaseMeta metav1.ObjectMeta
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Client coordinationv1client.LeasesGetter
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LockConfig ResourceLockConfig
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lease *coordinationv1.Lease
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}
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// Get returns the election record from a Lease spec
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func (ll *LeaseLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {
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var err error
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ll.lease, err = ll.Client.Leases(ll.LeaseMeta.Namespace).Get(ctx, ll.LeaseMeta.Name, metav1.GetOptions{})
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if err != nil {
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return nil, nil, err
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}
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record := LeaseSpecToLeaderElectionRecord(&ll.lease.Spec)
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recordByte, err := json.Marshal(*record)
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if err != nil {
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return nil, nil, err
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}
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return record, recordByte, nil
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}
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// Create attempts to create a Lease
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func (ll *LeaseLock) Create(ctx context.Context, ler LeaderElectionRecord) error {
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var err error
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ll.lease, err = ll.Client.Leases(ll.LeaseMeta.Namespace).Create(ctx, &coordinationv1.Lease{
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ObjectMeta: metav1.ObjectMeta{
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Name: ll.LeaseMeta.Name,
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Namespace: ll.LeaseMeta.Namespace,
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},
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Spec: LeaderElectionRecordToLeaseSpec(&ler),
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}, metav1.CreateOptions{})
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return err
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}
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// Update will update an existing Lease spec.
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func (ll *LeaseLock) Update(ctx context.Context, ler LeaderElectionRecord) error {
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if ll.lease == nil {
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return errors.New("lease not initialized, call get or create first")
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}
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ll.lease.Spec = LeaderElectionRecordToLeaseSpec(&ler)
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lease, err := ll.Client.Leases(ll.LeaseMeta.Namespace).Update(ctx, ll.lease, metav1.UpdateOptions{})
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if err != nil {
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return err
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}
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ll.lease = lease
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return nil
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}
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// RecordEvent in leader election while adding meta-data
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func (ll *LeaseLock) RecordEvent(s string) {
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if ll.LockConfig.EventRecorder == nil {
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return
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}
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events := fmt.Sprintf("%v %v", ll.LockConfig.Identity, s)
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ll.LockConfig.EventRecorder.Eventf(&coordinationv1.Lease{ObjectMeta: ll.lease.ObjectMeta}, corev1.EventTypeNormal, "LeaderElection", events)
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}
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// Describe is used to convert details on current resource lock
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// into a string
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func (ll *LeaseLock) Describe() string {
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return fmt.Sprintf("%v/%v", ll.LeaseMeta.Namespace, ll.LeaseMeta.Name)
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}
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// Identity returns the Identity of the lock
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func (ll *LeaseLock) Identity() string {
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return ll.LockConfig.Identity
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}
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func LeaseSpecToLeaderElectionRecord(spec *coordinationv1.LeaseSpec) *LeaderElectionRecord {
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var r LeaderElectionRecord
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if spec.HolderIdentity != nil {
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r.HolderIdentity = *spec.HolderIdentity
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}
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if spec.LeaseDurationSeconds != nil {
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r.LeaseDurationSeconds = int(*spec.LeaseDurationSeconds)
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}
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if spec.LeaseTransitions != nil {
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r.LeaderTransitions = int(*spec.LeaseTransitions)
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}
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if spec.AcquireTime != nil {
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r.AcquireTime = metav1.Time{spec.AcquireTime.Time}
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}
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if spec.RenewTime != nil {
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r.RenewTime = metav1.Time{spec.RenewTime.Time}
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}
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return &r
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}
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func LeaderElectionRecordToLeaseSpec(ler *LeaderElectionRecord) coordinationv1.LeaseSpec {
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leaseDurationSeconds := int32(ler.LeaseDurationSeconds)
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leaseTransitions := int32(ler.LeaderTransitions)
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return coordinationv1.LeaseSpec{
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HolderIdentity: &ler.HolderIdentity,
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LeaseDurationSeconds: &leaseDurationSeconds,
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AcquireTime: &metav1.MicroTime{ler.AcquireTime.Time},
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RenewTime: &metav1.MicroTime{ler.RenewTime.Time},
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LeaseTransitions: &leaseTransitions,
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}
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}
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