[ovirt-devel] DRBD Integration with oVirt

[Hayley Swimelar]

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
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