Description of problem:

Snap_schedule retention is getting removed after mgr restarts

Version-Release number of selected component (if applicable):

ceph version 16.2.8-53.el8cp 

How reproducible:


Steps to Reproduce:

1. Schedule a snapshot with snap_shcedule
2. Add Retention to the dir
3. Activate the snap_schedule to the dir
4. Check status of the schedule
5. Restart mgrs
6. Check again status of the schedule

Actual results:

retention data is gone after restart mgrs

Expected results:

retention should stay even though mgr restarts

Additional info:

[{"fs": "cephfs", "subvol": null, "path": "/", "rel_path": "/", "schedule": "1h", "retention": {"h": 5}, "start": "2022-06-22T14:59:00", "created": "2022-06-22T18:53:24", "first": null, "last": null, "last_pruned": null, "created_count": 0, "pruned_count": 0, "active": true}]

[cephuser@ceph-julpark-7eopvp-node7 ~]$ 

[{"fs": "cephfs", "subvol": null, "path": "/", "rel_path": "/", "schedule": "1h", "retention": {}, "start": "2022-06-22T14:59:00", "created": "2022-06-22T18:53:24", "first": "2022-06-22T18:59:00", "last": "2022-06-22T18:59:00", "last_pruned": null, "created_count": 1, "pruned_count": 0, "active": true}]

mgr_logs:
022-06-22 20:42:27,281 [Dummy-1] [DEBUG] [snap_schedule.fs.schedule] parse_retention(10h)
2022-06-22 20:42:27,282 [Dummy-1] [DEBUG] [snap_schedule.fs.schedule] parse_retention(10h) -> {'h': 10}
2022-06-22 20:42:27,282 [Dummy-1] [DEBUG] [snap_schedule.fs.schedule] db result is ('{}',)