[ovirt-users] Ovirt/Gluster

[Ravishankar N]

On 08/18/2015 04:22 PM, Ramesh Nachimuthu wrote:
> + Ravi from gluster.
>
> Regards,
> Ramesh
>
> ----- Original Message -----
> From: "Sander Hoentjen" <sander at hoentjen.eu>
> To: users at ovirt.org
> Sent: Tuesday, August 18, 2015 3:30:35 PM
> Subject: [ovirt-users] Ovirt/Gluster
>
> Hi,
>
> We are looking for some easy to manage self contained VM hosting. Ovirt
> with GlusterFS seems to fit that bill perfectly. I installed it and then
> starting kicking the tires. First results looked promising, but now I
> can get a VM to pause indefinitely fairly easy:
>
> My setup is 3 hosts that are in a Virt and Gluster cluster. Gluster is
> setup as replica-3. The gluster export is used as the storage domain for
> the VM's.

Hi,

What version of gluster and ovirt are you using?

>
> Now when I start the VM all is good, performance is good enough so we
> are happy. I then start bonnie++ to generate some load. I have a VM
> running on host 1, host 2 is SPM and all 3 VM's are seeing some network
> traffic courtesy of gluster.
>
> Now, for fun, suddenly the network on host3 goes bad (iptables -I OUTPUT
> -m statistic --mode random --probability 0.75 -j REJECT).
> Some time later I see the guest has a small "hickup", I'm guessing that
> is when gluster decides host 3 is not allowed to play anymore. No big
> deal anyway.
> After a while 25% of packages just isn't good enough for Ovirt anymore,
> so the host will be fenced.

I'm not sure what fencing means w.r.t ovirt and what it actually fences. 
As far is gluster is concerned, since only one node is blocked, the VM 
image should still be accessible by the VM running on host1.
> After a reboot *sometimes* the VM will be
> paused, and even after the gluster self-heal is complete it can not be
> unpaused, has to be restarted.

Could you provide the gluster mount (fuse?) logs and the brick logs of 
all 3 nodes when the VM is paused? That should give us some clue.

Regards,
Ravi
>
> Is there anything I can do to prevent the VM from being paused?
>
> Regards,
> Sander
>
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