[ovirt-users] Not able to resume a VM which was paused because of gluster quorum issue

[Darrell Budic]

This is a known issue in overt 3.5.x and below. It’s been solved in the upcoming ovirt 3.6.

Related to https://bugzilla.redhat.com/show_bug.cgi?id=1172905, the fix involved setting up a special cgroup for the mount, but i can’t find the exact details atm.


> On Sep 23, 2015, at 7:38 AM, Ramesh Nachimuthu <rnachimu at redhat.com> wrote:
> 
> 
> 
> On 09/22/2015 05:57 PM, Alastair Neil wrote:
>> You need to set the gluster.server-quorum-ratio to 51%
>> 
> 
> I did that. But still I am facing the same issue. VM get paused when I do some I/O using fio on some disks backed by gluster. I am not able to resume the VM after this. Now only way is to bring down the VM and run again. It runs successfully on the same host without any issue.
> 
> Regards,
> Ramesh
> 
>> On 22 September 2015 at 08:25, Ramesh Nachimuthu <rnachimu at redhat.com <mailto:rnachimu at redhat.com>> wrote:
>> 
>> 
>> On 09/22/2015 05:43 PM, Alastair Neil wrote:
>>> what are the gluster-quorum-type and gluster.server-quorum-ratio  settings on the volume?
>>> 
>> 
>> cluster.server-quorum-type:server
>> cluster.quorum-type:auto
>> gluster.server-quorum-ratio is not set.
>> 
>> One brick process is purposefully killed  but remaining two bricks are up and running.
>> 
>> Regards,
>> Ramesh
>> 
>>> On 22 September 2015 at 06:24, Ramesh Nachimuthu < <mailto:rnachimu at redhat.com>rnachimu at redhat.com <mailto:rnachimu at redhat.com>> wrote:
>>> Hi,
>>> 
>>>    I am not able to resume a VM which was paused because of gluster client quorum issue. Here is what happened in my setup. 
>>> 
>>> 1. Created a gluster storage domain which is backed by gluster volume with replica 3. 
>>> 2. Killed one brick process. So only two bricks are running in replica 3 setup.
>>> 3. Created two VMs
>>> 4. Started some IO using fio on both of the VMs
>>> 5. After some time got the following error in gluster mount and VMs moved to paused state.
>>>          " server 10.70.45.17:49217 <http://10.70.45.17:49217/> has not responded in the last 42 seconds, disconnecting."
>>>       "vmstore-replicate-0: e16d1e40-2b6e-4f19-977d-e099f465dfc6: Failing WRITE as quorum is not met"
>>>       more gluster mount logs at  <http://pastebin.com/UmiUQq0F>http://pastebin.com/UmiUQq0F <http://pastebin.com/UmiUQq0F>
>>> 6. After some time gluster quorum is active and I am able to write the the gluster file system.
>>> 7. When I try to resume the VM it doesn't work and I got following error in vdsm log.
>>>       http://pastebin.com/aXiamY15 <http://pastebin.com/aXiamY15>
>>> 
>>> 
>>> Regards,
>>> Ramesh
>>> 
>>> 
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>> 
>> 
> 
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