[Gluster-users] Machine becomes its own peer

Atin Mukherjee
2017-02-17T16:33:41Z

Joe - Scott had sent me a private email and I provided the work around, for
some (unknown) reason all the nodes ended up having two uuids for a
particular peer which caused it. I've asked for the log files to further
debug.

On Fri, 17 Feb 2017 at 21:58, Joe Julian <joe at julianfamily.org> wrote:

> Does your repaired server have the correct uuid /var/lib/glusterd/
> glusterd.info?
>
> On February 16, 2017 9:49:56 PM PST, Scott Hazelhurst <
> Scott.Hazelhurst at wits.ac.za> wrote:
>
>
> Dear all
>
> Last week I posted a query about a problem I had with a machine that had
failed but the underlying hard disk with the gluster brick was good. I?ve made
some progress in restoring. I now have the problem with my new restored machine
where it becomes its own peer, which then breaks everything.
>
> 1. Gluster daemons are off on all peers, content of /var/lib/glusterd/peers
looks good.
> 2. I start the gluster daemons on all peers. All looks good.
> 3. For about 2 minutes, there?s no obvious problem ? if I do a gluster peer
status on any machine it looks good, if I do a gluster volume status A01 on any
machine it looks good.
> 4. Then at some point, the /var/lib/glusterd/peers file of the new,
restored machine gets an entry for itself and things start breaking. A typical
error message is the understandable
>
> : Unable to get lock for uuid: 4fb930f7-554e-462a-9204-4592591feeb8, lock
held by: 4fb930f7-554e-462a-9204-4592591feeb8
>
> 5. This is repeatable ? if I stop daemons, remove the offending entry in
/var/lib/glusterd/peer, and restart, the same behavior occurs ? all good for a
minute or two and then something magically puts something in
/var/lib/glusterd/peers
>
> In a previous step in restoring my machine, I had a different error of
mismatching cksums and what I did then may be the cause of the problem.  In
searching the list archives I found someone with a similar cksum problem, and
the proposed solution was to copy the /var/lib/glusterd/vols/ from another of
the peers to the new machine. This may not be the issue but this is the only
thing I think I did that was unconventional.
>
> I am running version 3.7.5-19 on Scientific Linux 6.8
>
> If anyone can suggest a way forward I would be grateful
>
> Many thanks
>
> Scott
>
>
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--
- Atin (atinm)
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