Cinder

cinder backup incremental when volume change size

Bug #1992293 reported by Sang Tran
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Cinder
Incomplete
Low
Unassigned

Bug Description

Hello team,

I've just caught a new bug with cinder-backup, the step to reproduce as below:

1. Create a full backup with a volume size of 50 GB
2. Extend the original volume to 100 GB
3. Create an incremental backup of the same volume id --> Fail created

Workaround solution:
- Create the new full backup and then we can create incremental backup work normally

I think we should check the size changed before creating incremental or force create a new full backup with a new volume size instead.

Revision history for this message
Sofia Enriquez (lsofia-enriquez) wrote :

Hi Sang Tran,
Please share the next information:
- Backup driver
- Logs with the errors from c-bak and c-api.
Thanks

tags: added: backup backup-service
Changed in cinder:
status: New → Incomplete
importance: Undecided → Low
Revision history for this message
Sang Tran (sangtq8) wrote :
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Hi Sofia,

I used Backup S3 driver and the logs error from c-bak is shown below:

2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server [req-934aa717-c161-43c7-8db6-3d8ddaee046f 25cc962ecb444e0d8e28c843782958f5 ca53347fad024242bc91e7a11b87db16 - - -] Exception during message handling: cinder.exception.InvalidBackup: Invalid backup: Volume size increased since the last backup. Do a full backup.
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/oslo_messaging/rpc/server.py", line 165, in _process_incoming
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server res = self.dispatcher.dispatch(message)
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/oslo_messaging/rpc/dispatcher.py", line 309, in dispatch
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server return self._do_dispatch(endpoint, method, ctxt, args)
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/oslo_messaging/rpc/dispatcher.py", line 229, in _do_dispatch
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server result = func(ctxt, **new_args)
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/cinder/utils.py", line 890, in wrapper
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server return func(self, *args, **kwargs)
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/cinder/backup/manager.py", line 410, in create_backup
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server volume_utils.update_backup_error(backup, str(err))
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/oslo_utils/excutils.py", line 227, in __exit__
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server self.force_reraise()
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/oslo_utils/excutils.py", line 200, in force_reraise
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server raise self.value
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/cinder/backup/manager.py", line 399, in create_backup
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server updates = self._run_backup(context, backup, volume)
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/cinder/backup/manager.py", line 482, in _run_backup
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server updates = backup_service.backup(
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server File "/var/lib/kolla/venv/lib/python3.8/site-packages/cinder/backup/chunkeddriver.py", line 587, in backup
2022-10-13 19:48:00.605 22 ERROR oslo_messaging.rpc.server raise exception.InvalidBackup(reason=err)
2022-10-13 19:4...

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