On 06/04/2016 10:40 PM, Barak Korren wrote:

We are looking for advice on how best to have oVirt communicate with DRBD
Manage and we have come to two options:

My vote would be for native support rather then a Cinder based one. I
don't have any hard numbers, but it seems to me the adoption of
OpenStack technologies for use with oVirt is not as widespread as one
may hope.

But what sort of user experience and system architecture is intended?
Is configuration of volumes planned to be done directly from the oVirt
UI?

Once a DRBD Manage storage cluster is set up, oVirt would handle the management of DRBD volumes.

While oVirt can do a little Gluster volume management for now, it
seems it was done because it some point it was thought that oVirt
would be the primary management UI for Gluster. AFAIK Gluster is now
getting its own UI.

The DRBD Manage daemon ships with a command line utility which is the UI for interacting with DRBD 9. I do not believe that there is a stand alone DRBD GUI planned at this time.

At least for now, the user most likely will prepare a DRBD Manage cluster up to the point where it's ready to start creating/assigning volumes and then oVirt will take over from there.

As far as using DRBD for backing oVirt VMs, this seems to already be
working. The oVirt CI system (which runs on top of oVirt) had been
using a DRBD-backed NFS storage for years...

The most recent release of DRBD contains new features that allow it to integrate more directly with virtualization/cloud platforms. So VMs could have DRBD-backed storage without additional overhead from NFS.

--
Hayley Swimelar
LINBIT | Keeping the Digital World Running
DRBD — Corosync — Pacemaker
+1-503-573-1262 x212

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