[ovirt-users] VMs freeze during vm-host reboot

[Sahina Bose]

Did you see any errors in the gluster mount logs during the time when 
the VMs were frozen ( I assume the I/O not responding during this time?) 
. There have been bugs fixed around concurrent I/O on gluster volume and 
vm's pausing in 3.7.12 - the mount logs can tell us if you ran into 
similar issue.

On 07/08/2016 03:58 PM, bertjan wrote:
> Hi Michal,
>
> That's right. I put it in maintenance mode, so there were no VMs.
>
> The frozen VMs were on the other hosts. That's wat makes it strange and
> why it doesn't give me a good feeling. When someone can say  'I know the
> issue and it is fixed with gluster version 3.7.12', I would feel more reassured
> about it...
>
> Regards,
>
> Bertjan
>
> On Fri, Jul 08, 2016 at 12:23:21PM +0200, Michal Skrivanek wrote:
>>> On 08 Jul 2016, at 12:06, bertjan <b.j.goorkate at umcutrecht.nl> wrote:
>>>
>>> Hi,
>>>
>>> I have a 3-node CentOS7 based oVirt+replica-3 gluster environment with an engine
>>> on dedicated hardware.
>>>
>>> After putting the first vm-host into maintenance mode to update it from vdsm-4.17.28-1
>>> to vdsm-4.17.32-0 and from glusterfs-3.7.11-1 to glusterfs-3.7.12-2 (among others),
>>> random VMs froze (not pauzed. oVirt showed them as 'up') until the update was done and
>>> the vm-host was rebooted and active again.
>> I suppose the host you were updating at that time had no running VMs, right?
>> If so, then indeed perhaps a gluster issue
>>
>>> After all the vm-hosts were upgraded, I never experienced the problem again.
>>> Can this be a bug, fixed with the upgrade to glusterfs-3.7.12-2?
>>>
>>> Has anyone experienced the same problem?
>>>
>>> Thanks in advance! (next week I'm not able to check my e-mail, so response can be delayed).
>>>
>>> Regards,
>>>
>>> Bertjan
>>>
>>>
>>>
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