[Gluster-users] Unable to upgrade nodes because of cksums mismatch

[Ingo Fischer]

Hi,

in former releases like 9.x there was alwys a "major issues" section in 
the release notes like 
https://docs.gluster.org/en/latest/release-notes/9.0/#major-issues 
8especially in ".0" releases. Should this not be added to such a section 
in the 10.0 release notes to inform users that want to upgrade?

Ingo

Am 27.12.21 um 14:03 schrieb Nikhil Ladha:
> Hi Michael
> 
> I think you are hitting a similar issue like this one 
> https://github.com/gluster/glusterfs/issues/3066 
> <https://github.com/gluster/glusterfs/issues/3066>.
> If so, the fix for the same is under review and could be available in 
> the next release.
> 
> --
> Thanks and Regards,
> *NiKHIL LADHA*
> 
> 
> On Mon, Dec 27, 2021 at 6:25 PM Michael Böhm <dudleyperkins at gmail.com 
> <mailto:dudleyperkins at gmail.com>> wrote:
> 
>     Hey guys,
> 
>     i have a problem upgrading our nodes from 8.3 to 10.0 - i just
>     upgraded the first node and run into "the cksums mismatch" problem.
>     On the upgraded v10 node the checksums for all volumes are different
>     than on the other v8 nodes. That leads to the node starting in a
>     peer rejected state. I can only resolve this by following the
>     actions supposed here:
>     https://staged-gluster-docs.readthedocs.io/en/release3.7.0beta1/Administrator%20Guide/Resolving%20Peer%20Rejected/
>     <https://staged-gluster-docs.readthedocs.io/en/release3.7.0beta1/Administrator%20Guide/Resolving%20Peer%20Rejected/>
>     (stopping glusterd, deleting /var/lib/glusterd/* (except
>     glusterd.info <http://glusterd.info>), start glusterd, probe a v8
>     peer, restart glusterd again)
> 
>     The cluster seems healthy again, self-healing is started and
>     everything looks fine - only the newly created cksums are still
>     different than on the other nodes. That means this healthy
>     state only lasts till i reboot the node - where it all begins from
>     the start - the nodes comes up as peer rejected.
> 
>     Now i'v read about the problem here:
>     https://github.com/gluster/glusterfs/issues/1332
>     <https://github.com/gluster/glusterfs/issues/1332> (even though that
>     describes the problem should only occur when upgrading from earlier
>     than v7)
>     or also here on the mailing list:
>     https://lists.gluster.org/pipermail/gluster-users/2021-November/039679.html
>     <https://lists.gluster.org/pipermail/gluster-users/2021-November/039679.html>
>     (i think i have the same problem, but unfortunately no solution
>     given here)
> 
>     Solutions seem to require upgrading all nodes and the problem should
>     be resolved when finally upgrading op.version - but i dont' think
>     this approach can be done online, and there's not really a way for
>     me to do this offline.
> 
>     Why is this happening now and not when i upgraded from pre7 to 7?
>     All my nodes are 8.3 and op.version is 8000.
> 
>     One thing i might have done "wrong" - as i upgraded to v8 i didn't
>     set "gluster volume set <volname> fips-mode-rchecksum on" on the
>     volumes, i think i just overlooked it in the docs. I have this
>     option only set on 2 volumes i created after upgrading to v8. But
>     even on those 2 the cksums differ, so i guess it wouldn' help alot
>     if i set the option on all other volumes?
> 
>     I really don't know what to do now, i kinda understand the problem
>     but don't know why this is happening on a overall v8 cluster. I
>     can't take all 9 nodes down, upgrade all to v10 and rely on "it's
>     all good" with the final upgrade of op.version.
> 
>     Can someone point me in a safe direction?
> 
>     Regards
> 
>     Mika
> 
> 
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> 
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