[ovirt-devel] el6 future in ovirt-3.6

[Sahina Bose]

On 03/17/2015 11:12 PM, Dan Kenigsberg wrote:
> On Mon, Mar 16, 2015 at 06:02:36PM +0200, Sahina Bose wrote:
>> On 03/16/2015 03:28 PM, Dan Kenigsberg wrote:
>>> Current master branch of vdsm (destined for our 3.6 release) uses el7 as
>>> its main platform. New features are expected to be available only on el7
>>> (and modern Fedoras) but not on el6.
>>>
>>> On el6, vdsm still builds, runs, and exports clusterLevel <= 3.5, with
>>> no feature loss relative to 3.5. This has been done per gluster request.
>>>
>>> However, maintaining this furhter as high costs: we keep testing el6, we
>>> need to make sure nothing breaks there, and there's a lot of legacy code
>>> that we could start deleting.
>>>
>>> Sahina, would you explain (again... sorry for not recalling the details)
>>> why ovirt-3.6's vdsm should keep running on el6? I'd like to see if
>>> there's a nother means to solve the underlying gluster issue.
>> This was only because downstream gluster + vdsm would continue to be
>> supported on RHEL 6.
> Could you provide more details about your needs? Catering for d/s RHS is
> very important, but since it's expensive to maintain, I'd like to
> understand more.
>
> Please note again that when installed on el6, ovirt-3.6's vdsm would NOT
> expose clusterLevel=3.6, so theoretically you can keep ovirt-3.5's vdsm.
>
> Do you plan an Engine-side hack in order to use new 3.6 gluster functionality
> despite clusterLevel<=3.5?


I wasn't aware that ovirt-3.6 would not expose clusterLevel 3.6 when 
installed on el6.
Downstream RHS will need to be supported on both el6 and el7. And we 
have added some apis to vdsm master that we require for brick 
management, geo-rep management and gluster volume snapshot management.
We have 2 options
- fork off vdsm if it needs to move on to el7 support only in master.
- backport to vdsm 3.5 (depending on what we decide on cluster level 
support for downstream)


>
> Regards,
> Dan.