rbd-mirror: bootstrap wait for previous disabling group to cleanup
Was seeing a case where the following operations are done:
1. daemon is stopped on secondary
2. then mirroring on the group is disabled
3. added/removed image[s] to/from the group
4. enabled group back for mirroring
5. Mirroring daemon is brought back to life
From the handling:
1. Two GroupReplayer's are started by the InstanceReplayer, one for old group
and one for new group (not surprisingly both deal with the same pool images)
2. The GroupReplayer for old group instance enters into
group_replayer::BootstrapRequest, notices remote_group_id is not found, and
starts cleaning-up the group, """tries to remove local group and all the
images. Finally returns to GroupReplayer, stop the GroupReplayer setting
the state as stopped with description group removed and finally unregister
admin socket hook."""
3. On the other hand the GroupReplayer for new group instance runs in concurrent
to the old one, figures out local group_id by name exists and """tries to
remove local group and all the images. Finally returns to GroupReplayer,
stop the GroupReplayer setting the state as stopped with description group
removed and finally unregister admin socket hook."""
You can see 2 and 3 are ending up in the same situation because of the
concurrent behaviour. i.e one has to add the group with a name and create
images in the pool. Where as the other has to remove the group with same name
from the same pool.
Thanks to Ilya for the suggestion here, according to the suggestion the
fix is simple. The way this is handled for standalone images is that the
second replayer (i.e. (3)) sees that the image is in MIRROR_IMAGE_STATE_DISABLING
state and backs off (i.e.second group waits and retries later).
If the second replayer backs off with ERESTART, the first replayer should
eventually clean up the old group which would allow the second replayer to
proceed with creating a new group.
rbd_mirror: cleanup group status keys in the rbd_mirroring object
Keys & Values for "gremote_status_global_*" and "gstatus_global_*" are
getting readded in the rbd_mirroring object after they were removed at
group disable time as part of group_status_set(), as it doesn't defend
for disabled groups today.
Also librbd::cls_client::mirror_group_status_remove_down() was added in
the code but not levearaged, hence added code for unhappy path cleanup
as part of MirrorStatusWatcher::init() like it is calls
librbd::cls_client::mirror_image_status_remove_down() today.
rbd_mirror: update local {group_pool, group_pool} in ImageSnapshotNamespaceGroup
* Fix user group snapshot not moving to complete when the pool_id differ on
remote and locally.
* The Image snapshot namespace ImageSnapshotNamespaceGroup is copied
from remote src directly to dst locally and {group_pool, group_pool}
still hold remote details. This fix updates the namespace in the
image snapshot.
N Balachandran [Mon, 10 Feb 2025 15:10:07 +0000 (20:40 +0530)]
librbd: fix group snapshot unlink
Changes to the group mirror snapshot unlink:
- Fixes the group mirror snapshot unlink to behave like the
image mirror unlink.
- Renames UnlinkGroupPeerRequest to GroupUnlinkPeerRequest
and moves it into librbd/mirror/snapshot.
- Modifies prepare_group_images() to return the mirror_peer_uuids
which are then passed as an argument to GroupUnlinkPeerRequest.
Signed-off-by: N Balachandran <nithya.balachandran@ibm.com>
John Agombar [Thu, 6 Feb 2025 12:03:36 +0000 (12:03 +0000)]
qa/workunits/rbd: improvements to smoke tests
- Remove dynamic group behaviour in rbd_mirror_group.sh tests
- Add test for group enable/disable after force promote
- Test new fields in group info cmd
rbd-mirror: add peer_uuids for non-primary demoted group snapshot
GroupReplayer should add peer uuid for group snapshot if it is a
non-primary demoted snapshot, other wise this snapshot will be
unconditionally unlinked further, as doesn't have a peer uuid leading to
split-brain scenarios.
Credits to N Balachandran <nithya.balachandran@ibm.com> for the find.
John Agombar [Thu, 30 Jan 2025 13:04:13 +0000 (13:04 +0000)]
qa/workunits/rbd: updates to mirror group bash scripts
- support cli parameters to specify the test to run
- support cli parameter to specify the number of times to repeat the test
- new tests
- added RBD_MIRROR_NEW_IMPLICIT_BEHAVIOUR env variable in preparation for
changes to group snapshot behaviour
1. If group snapshot is syncing do not remove mirror peer uuid of last complete
snapshot [ i.e. currently incomlpete - 1] (on remote)
2. If group snapshot is synced do not remove mirror peer uuid of its
respective on remote yet.
Creating a global, pool or namespace level mirror snapshot
schedule shouldn't schedule mirror snapshots of images that
are part of a group and reside in the pool or namespace.
Also disallow directly scheduling mirror image snapshots on
images that are part of a group.
Ramana Raja [Tue, 5 Nov 2024 16:12:54 +0000 (11:12 -0500)]
qa/workunits/rbd: add basic tests for mirror group snapshot scheduler
Add tests to check the basic functionality of the
mirror_group_snapshot_schedule module. Check that
- `rbd mirror group snapshot schedule add/rm/status/ls` commands work
- the module can recover from blocklisting of its client and continue
to process requests
rbd-mirror: more improvements in the group replayer
- Arresting the interruptions after shutdown
- Restart GroupReplayer if bootstrap returns remote group id as empty
- Fix a test failure in "regular group snapshots test"
rbd-mirror: create group snapshots only if remote group snapshot is complete
Also do not create a regular group snapshot until the next mirror group
snapshot is created. Otherwise we simply have an incomplete regular group
snapshot until the next mirror group snapshot is created.
* fix braces in the imageMap update_images_added & update_images_removed
* do not allow image add from non-primary
* `down+unknown` status shown on querying individual images which are part
of group enabled for mirroring
* `mirror pool status` shows down+unknown status
* fix imageMap being overwritten when multiple images are enabled for mirroring
* fix misleading error msg when getting status of a non-mirror enabled group
$ rbd --cluster site-a group snap ls pool1/test_group --debug-rbd=0
NAME STATUS
group_snap1 ok
group_snap2 ok
.mirror.2_10416b8b4567_10536b8b4567 ok
$ rbd --cluster site-b group snap ls pool1/test_group --debug-rbd=0
NAME STATUS
.mirror.2_10376b8b4567_1037327b23c6 ok
group_snap1 ok
group_snap2 ok
.mirror.2_10416b8b4567_10536b8b4567 ok
rbd-mirror: add undo code, exclusive locking and quiescing
* add essential logic to undo partially succeeded API's like, group promote,
group demote, group enable, group disable, group image add and
group image remove
* add exclusive locking and quiescing with-in all the required group API's
* adress code duplication and optimization with in the group API's
Make sure group snapshots doesn't get copied to secondary if the group snapshot
is incomplete on primary. On creation time of a group snapshots on primary,
make sure to delete the previous snapshot in case it is incomplete.
test/rbd-mirror: eliminate a race in ResyncRequestedRemoteNotPrimary
Adjust the wait_for_notification call in TestMockImageReplayerSnapshotReplayer.ResyncRequestedRemoteNotPrimary
to expect 2 notifications instead of 1. This allows the test to correctly wait for both expected events
i.e for finish_sync() and handle_replay_complete(locker, -EREMOTEIO, "remote image demoted"), ensuring the
replayer transitions to STATE_COMPLETE and is_replaying() returns false as intended.
Ville Ojamo [Fri, 18 Jul 2025 05:53:08 +0000 (12:53 +0700)]
doc/radosgw: Simple fixes and improvements, links improvements
Fix table with a column separator problem in s3/bucketops.rst.
Remove whitespaces at end of lines in s3/bucketops.rst.
Linkify mention of multizone into multisite.rst in bucket_logging.rst.
Separate units from numbers with a space in bucket_logging.rst
Consistency in capitalization and full stop usage in table data in
s3-notification-compatibility.rst s3/bucketops.rst.
Use ref for intra-docs link instead of "external links" feature in
s3/bucketops.rst notifications.rst s3.rst, add a label in start of
s3-notification-compatibility.rst for it. Follow label format that seems
to be in the majority.
Use auto-generated link text that ref provides.
Reflow the text in the cell. Extend table syntax width to accommodate
longer text in cell.
Use ref similarly on links to s3/bucketops.rst. Add a label in it and
use it from bucket_logging.rst and notifications.rst.
Delete unused external link definition in s3/bucketops.rst.
Remove multiple whitespace at the end of lines in notifications.rst
s3-notification-compatibility.rst bucketops.rst.
Change tab characters to spaces in indentation in bucketops.rst
Signed-off-by: Ville Ojamo <14869000+bluikko@users.noreply.github.com>
projects / ceph-ci.git / log