[Gluster-users] Self-Heal Daemon not Running

[Andrew Lau]

On Wed, Sep 25, 2013 at 2:28 PM, Ravishankar N <ravishankar at redhat.com>wrote:

>  On 09/25/2013 06:16 AM, Andrew Lau wrote:
>
>  That's where I found the 200+ entries
>
>  [ root at hv01 ]gluster volume heal STORAGE info split-brain
> Gathering Heal info on volume STORAGE has been successful
>
>  Brick hv01:/data1
> Number of entries: 271
> at                    path on brick
>
>   2013-09-25 00:04:29 /6682d31f-39ce-4896-99ef-14e1c9682585/dom_md/ids
> 2013-09-25 00:04:29
> /6682d31f-39ce-4896-99ef-14e1c9682585/images/5599c7c7-0c25-459a-9d7d-80190a7c739b/0593d351-2ab1-49cd-a9b6-c94c897ebcc7
>  2013-09-24 23:54:29 <gfid:9c83f7e4-6982-4477-816b-172e4e640566>
> 2013-09-24 23:54:29 <gfid:91e98909-c217-417b-a3c1-4cf0f2356e14>
> <snip>
>
>   Brick hv02:/data1
> Number of entries: 0
>
>  When I run the same command on hv02, it will show the reverse (the other
> node having 0 entries).
>
>  I remember last time having to delete these files individually on
> another split-brain case, but I was hoping there was a better solution than
> going through 200+ entries.
>
>   While I haven't tried it out myself, Jeff Darcy has written a script (
> https://github.com/jdarcy/glusterfs/tree/heal-script/extras/heal_script)
> which helps in automating the process. He has detailed it's usage in his
> blog post http://hekafs.org/index.php/2012/06/healing-split-brain/
>
> Hope this helps.
> -Ravi
>

That didn't end up working, ImportError: No module named volfilter

But I didn't end up spending much time with it as the number of entries
magically reduced to 10, I removed the files and the split-brain info
reports 0 entries. Still wondering why there's different file sizes on the
two bricks.

>
>   Cheers.
>
>
>  On Wed, Sep 25, 2013 at 10:39 AM, Mohit Anchlia <mohitanchlia at gmail.com>wrote:
>
>> What's the output of
>>
>>  gluster volume heal $VOLUME info split-brain
>>
>>
>>   On Tue, Sep 24, 2013 at 5:33 PM, Andrew Lau <andrew at andrewklau.com>wrote:
>>
>>>   Found the BZ https://bugzilla.redhat.com/show_bug.cgi?id=960190 - so
>>> I restarted one of the volumes and it seems to have restarted the all
>>> daemons again.
>>>
>>>  Self heal started again, but I seem to have split-brain issues
>>> everywhere. There's over 100 different entries on each node, what's the
>>> best way to restore this now? Short of having to manually go through and
>>> delete 200+ files. It looks like a full split brain as the file sizes on
>>> the different nodes are out of balance by about 100GB or so.
>>>
>>>  Any suggestions would be much appreciated!
>>>
>>>  Cheers.
>>>
>>> On Tue, Sep 24, 2013 at 10:32 PM, Andrew Lau <andrew at andrewklau.com>wrote:
>>>
>>>>  Hi,
>>>>
>>>>  Right now, I have a 2x1 replica. Ever since I had to reinstall one of
>>>> the gluster servers, there's been issues with split-brain. The self-heal
>>>> daemon doesn't seem to be running on either of the nodes.
>>>>
>>>>  To reinstall the gluster server (the original brick data was intact
>>>> but the OS had to be reinstalled)
>>>>  - Reinstalled gluster
>>>> - Copied over the old uuid from backup
>>>> - gluster peer probe
>>>> - gluster volume sync $othernode all
>>>> - mount -t glusterfs localhost:STORAGE /mnt
>>>> - find /mnt -noleaf -print0 | xargs --null stat >/dev/null
>>>> 2>/var/log/glusterfs/mnt-selfheal.log
>>>>
>>>>  I let it resync and it was working fine, atleast so I thought. I just
>>>> came back a few days later to see there's a miss match in the brick
>>>> volumes. One is 50GB ahead of the other.
>>>>
>>>>  # gluster volume heal STORAGE info
>>>> Status: self-heal-daemon is not running on
>>>> 966456a1-b8a6-4ca8-9da7-d0eb96997cbe
>>>>
>>>>  /var/log/gluster/glustershd.log doesn't seem to have any recent logs,
>>>> only those from when the two original gluster servers were running.
>>>>
>>>>  # gluster volume status
>>>>
>>>>  Self-heal Daemon on localhost N/A N N/A
>>>>
>>>>  Any suggestions would be much appreciated!
>>>>
>>>>  Cheers
>>>>  Andrew.
>>>>
>>>
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