[ovirt-users] ovirt and gluster storage domain HA testing

[Sahina Bose]

On 02/17/2016 05:08 AM, Bill James wrote:
> I have a ovirt cluster with and system running ovirt-engine 3.6.2.6-1 
> on centos7.2
> and 3 hardware nodes running glusterfs 3.7.6-1 and centos7.2.
> I created a gluster volume using gluster cli and then went to add a 
> storage domain.
>
> I created it with Path ovirt1-ks.test:/gv1 and all works fine, until 
> ovirt1 goes down.
> Then ALL VMs pause till ovirt1 comes back up.
> Do I have to list all nodes in the path for this to work?
>
> Path: ovirt1-ks.test:/gv1 ovirt2-ks.test:/gv1 ovirt3-ks.test:/gv1
>
> Or how do I prevent ovirt1 from being single point of failure?

Which type of storage domain have you created - NFS or GlusterFS?
With NFS, this could be a problem, as the nfs server running on ovirt1 
can become single point of failure. To work around this, you will need 
to set up HA with CTDB or pacemaker/corosync depending on version of NFS 
you're using.

If you're using glusterfs, did the hypervisor node go down as well when 
ovirt1 went down? Only during mounting of the storage domain (either on 
activate of hypervisor host/ reboot of host) is the server provided in 
path required to access volume (ovirt1). You can provide 
backup-volfile-servers=ovirt2-ks:ovirt3-ks in Mount options while 
creating the storage domain.

Please also provide output of gluster volume info. (I'm assuming the 
bricks on the remaining servers were online)


>
>
> Thanks.
>
>
>
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