Gluster users - Jan 2017 - High-availability with KVM?

Hi,

I have a 4-node gluster with distributed-replicated volumes that serve
out VM images.  The purpose of using gluster was to provide highly
available storage for our virtualization platform.  When performing
maintenance on one of the gluster nodes, I noticed the VM storage
becomes unavailable for the duration of the node being shutdown and
while the heal is running.  Each VM qemu process connects to gluster
directly and needs to be restarted in order to bring up the VM again.

So, is the setup wrong or does gluster not provide high availability?

Thanks,

Ziemowit

> So, is the setup wrong or does gluster not provide high availability?
How exactly is it setup ?
libgfapi ? fuse ? NFS mount ?

It should work, we're using proxmox at work (which uses KVM) with gluster
and it does work well. What version of gluster are you using ?

-- 
Kevin Lemonnier
PGP Fingerprint : 89A5 2283 04A0 E6E9 0111
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As long as there are enough nodes to satisfy quorum, the volumes should
remain R/W. Have you tried writing to the volume during this period?
Anything in your logs?

Doug

On 20 January 2017 at 17:06, Ziemowit Pierzycki <ziemowit at
pierzycki.com>
wrote:
> Hi,
>
> I have a 4-node gluster with distributed-replicated volumes that serve
> out VM images.  The purpose of using gluster was to provide highly
> available storage for our virtualization platform.  When performing
> maintenance on one of the gluster nodes, I noticed the VM storage
> becomes unavailable for the duration of the node being shutdown and
> while the heal is running.  Each VM qemu process connects to gluster
> directly and needs to be restarted in order to bring up the VM again.
>
> So, is the setup wrong or does gluster not provide high availability?
>
> Thanks,
>
> Ziemowit
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://lists.gluster.org/mailman/listinfo/gluster-users
>
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