On Fri, May 29, 2026 at 2:33 PM Eugen Block via ceph-users
<[email protected]> wrote:
>
> Hi,
>
> I wanted to rollback a group snapshot on Ubuntu 24.04 (rbd client
> version 19.2.1), the Ceph cluster version is 19.2.3. The client fails
> with "invalid argument":
>
> controller02:~# rbd --id <user> group snap rollback --pool images
> --group test-servers --snap 20260430_start
> Rolling back to group snapshot: 0% complete...failed.
> rbd: rollback group to snapshot failed: (22) Invalid argument
>
> controller02:~# ceph -v
> ceph version 19.2.1 (9efac4a81335940925dd17dbf407bfd6d3860d28) squid (stable)
>
> But running the same command (just as admin not as <user>) on a Ceph
> node works:
>
> ceph03:~ # rbd group snap rollback --pool images --group test-servers
> --snap 20260430_start
> Rolling back to group snapshot: 100% complete...done.
>
> ceph03:~ # ceph -v
> ceph version 16.2.13-66-g54799ee0666
> (54799ee06669271880ee5fc715f99202002aa371) pacific (stable)
>
>
> What seems to be the issue here is that I removed an image from the
> group snapshot. I wonder if it could be this bug [0] which is supposed
> to be fixed in 19.2.0 according to the "Released In" field of the
> Squid backport tracker [1].
>
> This seems a little inconsistent to me, could someone please clarify?
Hi Eugen,
Did you see "group snapshot membership does not match group membership"
error message when the rollback command failed with 19.2.1 client?
Thanks,
Ilya
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