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https://github.com/ceph/ceph-csi.git
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d886ab0d66
use leases for leader election instead of the deprecated configmap based leader election. This PR is making leases as default leader election refer https://github.com/kubernetes-sigs/ controller-runtime/pull/1773, default from configmap to configmap leases was done with https://github.com/kubernetes-sigs/ controller-runtime/pull/1144. Release notes https://github.com/kubernetes-sigs/ controller-runtime/releases/tag/v0.7.0 Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
87 lines
2.3 KiB
Go
87 lines
2.3 KiB
Go
/*
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Copyright 2020 The Ceph-CSI 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 controller
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import (
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"fmt"
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"github.com/ceph/ceph-csi/internal/util/log"
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"k8s.io/client-go/tools/leaderelection/resourcelock"
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clientConfig "sigs.k8s.io/controller-runtime/pkg/client/config"
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"sigs.k8s.io/controller-runtime/pkg/manager"
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"sigs.k8s.io/controller-runtime/pkg/manager/signals"
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)
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// Manager is the interface that will wrap Add function.
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// The New controllers which gets added, as to implement Add function to get
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// started by the manager.
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type Manager interface {
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Add(manager.Manager, Config) error
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}
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// Config holds the drivername and namespace name.
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type Config struct {
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DriverName string
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Namespace string
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}
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// ControllerList holds the list of managers need to be started.
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var ControllerList []Manager
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// addToManager calls the registered managers Add method.
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func addToManager(mgr manager.Manager, config Config) error {
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for _, c := range ControllerList {
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err := c.Add(mgr, config)
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if err != nil {
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return fmt.Errorf("failed to add: %w", err)
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}
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}
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return nil
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}
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// Start will start all the registered managers.
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func Start(config Config) error {
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electionID := config.DriverName + "-" + config.Namespace
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opts := manager.Options{
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LeaderElection: true,
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// disable metrics
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MetricsBindAddress: "0",
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LeaderElectionNamespace: config.Namespace,
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LeaderElectionResourceLock: resourcelock.LeasesResourceLock,
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LeaderElectionID: electionID,
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}
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mgr, err := manager.New(clientConfig.GetConfigOrDie(), opts)
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if err != nil {
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log.ErrorLogMsg("failed to create manager %s", err)
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return err
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}
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err = addToManager(mgr, config)
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if err != nil {
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log.ErrorLogMsg("failed to add manager %s", err)
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return err
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}
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err = mgr.Start(signals.SetupSignalHandler())
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if err != nil {
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log.ErrorLogMsg("failed to start manager %s", err)
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}
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return err
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}
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