We prefer Ceph too and we've got our ovirt instance configured in two
different ways.

1. Openstack Cinder, each VM's disk will have a single volume in ceph with
all volumes being under the same pool.
2. Export an RBD via NFS from a gateway machine, this can be a trivially
small physical or virtual machine that just exports the NFS share that is
pointed at whatever RBD you choose to use.

Not a direct answer to your question, but hopefully it helps.


On Wed, Jan 25, 2017 at 12:55 PM, Yura Poltoratskiy <yurapolt...@gmail.com>

> Hi,
> I want to use Ceph with oVirt in some non standard way. The main idea is
> to map rbd volume to all computes and to get the same block device, say
> /dev/foo/bar, across all nodes, and then use "POSIX compliant file systems"
> option to add Storage Domain.
> Am I crazy? If not, what should I do next: create a file system on top of
> /dev/foo/bar, say XFS, and add DATA Domain as POSIX compliant? Does it
> work, I mean does oVirt compatible with not clustered file system in this
> scenario?
> Mostly, I want to use rbd like oVirt do with iSCSI storage just to have
> scalability and high availability (for example, when one storage node
> failed).
> Thanks for advice.
> PS. Yes, I know about Gluster but want to use Ceph :)
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