For HA you will need some kind of storage available to all the compute
nodes in the cluster. If you have no external storage and few nodes, I
think your best option for storage is gluster , and the minimum number
of nodes you will need for HA is 3 (the third gluster node can be
metadata-only, but you still need that third node to give you quorum,
avoid split-brains and have something that you can call "HA" with a
straight face.

Eduardo Mayoral Jimeno (
Administrador de sistemas. Departamento de Plataformas. Arsys internet.
+34 941 620 145 ext. 5153

On 03/11/17 08:10, Artem Tambovskiy wrote:
> Looking for a design advise on oVirt provisioning. I'm running a PoC
> lab on single bare-metal host (suddenly it was setup with just Local
> Storage domain) and 
> no I'd like to rebuild the setup by making a cluster of 2 physical
> servers, no external storage array available. That are the options
> here? is there any options to build cheap HA cluster with just 2 servers? 
> Thanks in advance!
> Artem
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