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https://github.com/ceph/ceph-csi.git
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e013cfed15
During the Demote volume store the image creation timestamp. During Resync do below operation * Check image creation timestamp stored during Demote operation and current creation timestamp during Resync and check both are equal and its for force resync then issue resync * If the image on both sides is not in unknown state, check last_snapshot_timestamp on the local mirror description, if its present send volumeReady as false or else return error message. If both the images are in up+unknown the send volumeReady as true. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
101 lines
3.5 KiB
Go
101 lines
3.5 KiB
Go
/*
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Copyright 2023 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 rbd
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import (
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"context"
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"fmt"
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librbd "github.com/ceph/go-ceph/rbd"
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)
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func (rv *rbdVolume) ResyncVol(localStatus librbd.SiteMirrorImageStatus) error {
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if err := rv.resyncImage(); err != nil {
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return fmt.Errorf("%w: failed to resync image: %w", ErrResyncImageFailed, err)
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}
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// If we issued a resync, return a non-final error as image needs to be recreated
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// locally. Caller retries till RBD syncs an initial version of the image to
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// report its status in the resync request.
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return fmt.Errorf("%w: awaiting initial resync due to split brain", ErrUnavailable)
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}
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// repairResyncedImageID updates the existing image ID with new one.
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func (rv *rbdVolume) RepairResyncedImageID(ctx context.Context, ready bool) error {
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// During resync operation the local image will get deleted and a new
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// image is recreated by the rbd mirroring. The new image will have a
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// new image ID. Once resync is completed update the image ID in the OMAP
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// to get the image removed from the trash during DeleteVolume.
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// if the image is not completely resynced skip repairing image ID.
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if !ready {
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return nil
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}
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j, err := volJournal.Connect(rv.Monitors, rv.RadosNamespace, rv.conn.Creds)
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if err != nil {
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return err
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}
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defer j.Destroy()
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// reset the image ID which is stored in the existing OMAP
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return rv.repairImageID(ctx, j, true)
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}
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func (rv *rbdVolume) DisableVolumeReplication(
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mirroringInfo *librbd.MirrorImageInfo,
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force bool,
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) error {
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if !mirroringInfo.Primary {
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// Return success if the below condition is met
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// Local image is secondary
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// Local image is in up+replaying state
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// If the image is in a secondary and its state is up+replaying means
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// its a healthy secondary and the image is primary somewhere in the
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// remote cluster and the local image is getting replayed. Return
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// success for the Disabling mirroring as we cannot disable mirroring
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// on the secondary image, when the image on the primary site gets
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// disabled the image on all the remote (secondary) clusters will get
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// auto-deleted. This helps in garbage collecting the volume
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// replication Kubernetes artifacts after failback operation.
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localStatus, rErr := rv.GetLocalState()
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if rErr != nil {
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return fmt.Errorf("%w: %w", ErrFetchingLocalState, rErr)
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}
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if localStatus.Up && localStatus.State == librbd.MirrorImageStatusStateReplaying {
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return nil
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}
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return fmt.Errorf("%w: secondary image status is up=%t and state=%s",
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ErrInvalidArgument, localStatus.Up, localStatus.State)
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}
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err := rv.DisableImageMirroring(force)
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if err != nil {
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return fmt.Errorf("%w: %w", ErrDisableImageMirroringFailed, err)
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}
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// the image state can be still disabling once we disable the mirroring
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// check the mirroring is disabled or not
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mirroringInfo, err = rv.GetImageMirroringInfo()
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if err != nil {
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return fmt.Errorf("%w: %w", ErrFetchingMirroringInfo, err)
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}
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if mirroringInfo.State == librbd.MirrorImageDisabling {
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return fmt.Errorf("%w: %q is in disabling state", ErrAborted, rv.VolID)
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}
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return nil
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}
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