The commands were:
controller02:~# rbd --id user group create images/test-servers
controller02:~# for i in 0f69278e-00c2-46b0-b6e7-0b06e9c8b6fd
72f5816c-c1db-44de-b0a2-19d661faa963
47d6144e-0d5a-4dc7-82dd-5be3edf9f6cc; do rbd --id user group image add
images/test-servers images/${i}_disk; done
controller02:~# rbd --id user group image ls images/test-servers
images/0f69278e-00c2-46b0-b6e7-0b06e9c8b6fd_disk
images/47d6144e-0d5a-4dc7-82dd-5be3edf9f6cc_disk
images/72f5816c-c1db-44de-b0a2-19d661faa963_disk
controller02:~# rbd --id user group snap create images/test-servers@snap1
controller02:~# rbd --id user group snap ls images/test-servers
NAME STATUS
snap1 ok
# rollback works for all images
controller02:~# rbd --id user group snap rollback images/test-servers@snap1
Rolling back to group snapshot: 100% complete...done.
# removing one image from the group
controller02:~# rbd --id user group image rm images/test-servers
images/0f69278e-00c2-46b0-b6e7-0b06e9c8b6fd_disk
# rollback fails
controller02:~# rbd --id user group snap rollback images/test-servers@snap1
Rolling back to group snapshot: 0% complete...failed.
rbd: rollback group to snapshot failed: (22) Invalid argument
I'll add the debug output later, will need to sanitze it first. But I
don't see anything obvious in there.
Zitat von Ilya Dryomov <[email protected]>:
On Fri, May 29, 2026 at 4:05 PM Eugen Block <[email protected]> wrote:
Hi,
thanks for your quick reply. No I didn't see any additional output
than the one I shared (invalid argument). I could add debug log level
if necessary.
That error message should have been displayed no matter the log level,
so something other than https://tracker.ceph.com/issues/66300 might be
involved.
What exactly do you mean by "I removed an image from the group
snapshot"? Which commands were run there and in what order?
But one more detail, I also tried the rollback directly within the
cephadm shell (so version 19.2.3) with the same result:
ceph03:~ # cephadm shell
...
[ceph: root@ceph03 /]# rbd group snap rollback
images/test-servers@20260430_start
Rolling back to group snapshot: 0% complete...failed.
rbd: rollback group to snapshot failed: (22) Invalid argument
[ceph: root@ceph03 /]# ceph -v
ceph version 19.2.3 (c92aebb279828e9c3c1f5d24613efca272649e62)
squid (stable)
Can you try appending --debug-ms 1 --debug-rbd 20 to the command
(let's stick to this cephadm shell) and attach the output?
Thanks,
Ilya
Thanks!
Eugen
Zitat von Ilya Dryomov <[email protected]>:
> 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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