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68bd44beba
In the case of Disaster Recovery failover, the user expected to create the static PVC's. We have planned not to go with the PVC name and namespace for many reasons (as in kubernetes it's planned to support PVC transfer to a new namespace with a different name and with new features coming in like data populator etc). For now, we are planning to go with static PVC's to support async mirroring. During Async mirroring only the RBD images are mirrored to the secondary site, and when the user creates the static PVC's on the failover we need to regenerate the omap data. The volumeHandler in PV spec is an encoded string which contains clusterID and poolID and image UUID, The clusterID and poolID won't remain same on both the clusters, for that cephcsi need to generate the new volume handler and its to create a mapping between new volume handler and old volume handler with that whenever cephcsi gets csi requests it check if the mapping exists it will pull the new volume handler and continues other operations. The new controller watches for the PVs created, It checks if the omap exists if it doesn't it will regenerate the entire omap data. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
79 lines
2.2 KiB
Go
79 lines
2.2 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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"github.com/ceph/ceph-csi/internal/util"
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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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// ContollerManager 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 ContollerManager 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 []ContollerManager
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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 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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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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util.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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util.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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util.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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