b72230379f
With kubernetes 1.18 release of client-go, signatures on methods in generated clientsets, dynamic, metadata, and scale clients have been modified to accept context.Context as a first argument. Signatures of Create, Update, and Patch methods have been updated to accept CreateOptions, UpdateOptions and PatchOptions respectively. Signatures of Delete and DeleteCollection methods now accept DeleteOptions by value instead of by reference. These changes are now accommodated with this PR and client-go and dependencies are updated to v1.18.0 Signed-off-by: Humble Chirammal <hchiramm@redhat.com>
105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
/*
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Copyright 2019 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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"bytes"
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"context"
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"encoding/json"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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)
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const (
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UnknownLeader = "leaderelection.k8s.io/unknown"
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)
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// MultiLock is used for lock's migration
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type MultiLock struct {
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Primary Interface
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Secondary Interface
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}
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// Get returns the older election record of the lock
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func (ml *MultiLock) Get(ctx context.Context) (*LeaderElectionRecord, []byte, error) {
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primary, primaryRaw, err := ml.Primary.Get(ctx)
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if err != nil {
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return nil, nil, err
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}
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secondary, secondaryRaw, err := ml.Secondary.Get(ctx)
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if err != nil {
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// Lock is held by old client
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if apierrors.IsNotFound(err) && primary.HolderIdentity != ml.Identity() {
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return primary, primaryRaw, nil
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}
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return nil, nil, err
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}
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if primary.HolderIdentity != secondary.HolderIdentity {
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primary.HolderIdentity = UnknownLeader
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primaryRaw, err = json.Marshal(primary)
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if err != nil {
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return nil, nil, err
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}
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}
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return primary, ConcatRawRecord(primaryRaw, secondaryRaw), nil
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}
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// Create attempts to create both primary lock and secondary lock
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func (ml *MultiLock) Create(ctx context.Context, ler LeaderElectionRecord) error {
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err := ml.Primary.Create(ctx, ler)
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if err != nil && !apierrors.IsAlreadyExists(err) {
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return err
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}
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return ml.Secondary.Create(ctx, ler)
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}
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// Update will update and existing annotation on both two resources.
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func (ml *MultiLock) Update(ctx context.Context, ler LeaderElectionRecord) error {
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err := ml.Primary.Update(ctx, ler)
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if err != nil {
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return err
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}
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_, _, err = ml.Secondary.Get(ctx)
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if err != nil && apierrors.IsNotFound(err) {
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return ml.Secondary.Create(ctx, ler)
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}
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return ml.Secondary.Update(ctx, ler)
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}
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// RecordEvent in leader election while adding meta-data
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func (ml *MultiLock) RecordEvent(s string) {
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ml.Primary.RecordEvent(s)
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ml.Secondary.RecordEvent(s)
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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 (ml *MultiLock) Describe() string {
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return ml.Primary.Describe()
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}
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// Identity returns the Identity of the lock
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func (ml *MultiLock) Identity() string {
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return ml.Primary.Identity()
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}
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func ConcatRawRecord(primaryRaw, secondaryRaw []byte) []byte {
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return bytes.Join([][]byte{primaryRaw, secondaryRaw}, []byte(","))
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}
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