[ovirt-devel] DRBD Integration with oVirt

[Yaniv Kaul]

On Mon, Jun 6, 2016 at 7:23 PM, Hayley Swimelar <hayley at linbit.com> wrote:

>
>
> 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.
>

Is using the CLI considered a 'stable API' ? (or perhaps it can output a
JSON or something that can be considered as such)?


> 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.


Via RADOS pools?
Y.


>
>
> --
> Hayley Swimelar
> LINBIT | Keeping the Digital World Running
> DRBD — Corosync — Pacemaker
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