On Wed, Oct 4, 2023 at 3:40 PM Kushagr Gupta
<[email protected]> wrote:
>
> Hi Team,Milind
>
> Ceph-version: Quincy, Reef
> OS: Almalinux 8
>
> Issue: snap_schedule works after 1 hour of schedule
>
> Description:
>
> We are currently working in a 3-node ceph cluster.
> We are currently exploring the scheduled snapshot capability of the ceph-mgr
> module.
> To enable/configure scheduled snapshots, we followed the following link:
>
>
>
> https://docs.ceph.com/en/quincy/cephfs/snap-schedule/
>
>
>
> We were able to create snap schedules for the subvolumes as suggested.
> But we have observed a two very strange behaviour:
> 1. The snap_schedules only work when we restart the ceph-mgr service on the
> mgr node:
> We then restarted the mgr-service on the active mgr node, and after 1 hour
> it started getting created. I am attaching the log file for the same after
> restart. Thre behaviour looks abnormal.
A mgr restart is not required for the schedule to get triggered.
How many hours did you wait after the "start time" and decide to restart mgr ?
>
> So, for eg consider the below output:
> ```
> [root@storagenode-1 ~]# ceph fs snap-schedule status
> /volumes/subvolgrp/test3
> {"fs": "cephfs", "subvol": null, "path": "/volumes/subvolgrp/test3",
> "rel_path": "/volumes/subvolgrp/test3", "schedule": "1h", "retention": {},
> "start": "2023-10-04T07:20:00", "created": "2023-10-04T07:18:41", "first":
> "2023-10-04T08:20:00", "last": "2023-10-04T09:20:00", "last_pruned": null,
> "created_count": 2, "pruned_count": 0, "active": true}
> [root@storagenode-1 ~]#
> ```
> As we can see in the above o/p, we created the schedule at
> 2023-10-04T07:18:41. The schedule was suppose to start at 2023-10-04T07:20:00
> but it started at 2023-10-04T08:20:00
seems normal behavior to me
the schedule starts countdown for 1h from 2023-10-04T07:20:00 and
created first snapshot at 2023-10-04T08:20:00
>
> Any input w.r.t the same will be of great help.
>
> Thanks and Regards
> Kushagra Gupta
--
Milind
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