[Users] HA and Live Migration FS Recommendations

[Juan Hernandez]

On 05/21/2012 03:02 PM, Neil wrote:
> I'm very new to oVirt and I have some questions that I can't seem to
> find answers for, so please go easy on me.
>
> We are looking at implementing a HA KVM virtualization environment
> over two(3 in total at a later stage) physical nodes using oVirt for
> about 8 guests using Centos 6.2.
>
> What I am looking at doing is using a fibre channel SAN to implement
> shared storage by allowing both physical nodes to see the same LUN on
> the SAN so that both physical nodes will have access to a shared
> filesystem for storing guest images on.
> I've opted for the shared LUN/storage approach to allow for HA and
> live migration of guests between the physical nodes.
>
> Do I need to configure GFS2 before oVirt so that both physical nodes
> can have access to the same LUN for the guest images; or will oVirt
> automatically handle locking/fencing etc. on the common filesystem?
>
> I've tried using luci/ricci to setup a "storage" cluster using GFS2
> with oVirt mounting the GFS2 filesystem as a local directory, but this
> seems far from ideal.

You don't need GFS2 or any other filesystem. Just create a Fibre Channel 
storage domain with your LUNs and oVirt will use them directly without 
any filesystem involved.