openstack team mailing list archive

[Jérôme Gallard <jeronimo974@xxxxxxxxx>]

Hi Sylvain,

Great to know that you found how to solve your issue.

Thanks for reporting that you found the Grizzly doc confusing.
In fact, the Grizzly release introduced the multi-backend feature. This
feature allows to have more than one backend on a same compute (ie, to be
able to have several cinder-volume running on a same compute). This feature
is not available in Folsom: you can only run one cinder-volume per compute
(in that case, if you want to manage several backends, you have to have
several computes).

Thanks a lot for your remarks,
Jérôme


On Fri, May 31, 2013 at 1:55 PM, Sylvain Bauza
<sylvain.bauza@xxxxxxxxxxxx>wrote:

>  Thanks but it didn't match my needs. I already know how to deploy Cinder
> on a single host, my point was more relative to deploying a second
> Cinder-volume instance, and if yes, what to do.
>
> Nevermind, I successed in deploying a second Cinder-volume, just by
> looking at the packages and the confs. It's pretty straightforward, so I'm
> not surprised it wasn't documented. Nevertheless, I think that the Grizzly
> doc I mentioned [1] is confusing : by looking at it, I was thinking Cinder
> was unable to have two distinct volumes with Folsom release. Maybe updating
> the folsom branch for Cinder documentation, precising it *is* possible, is
> worth a try ?
>
> Anyway, I'm documenting out the process in my own (new) blog. Keep tuned,
> I'll post the URL out there.
>
> -Sylvain
>
>
>
> Le 31/05/2013 11:39, Jérôme Gallard a écrit :
>
> Hi Sylvain,
>
>  Maybe the folsom documentation for cinder will help you:
>
> http://docs.openstack.org/folsom/openstack-compute/install/apt/content/osfolubuntu-cinder.html
>
>
>  Regards,
> Jérôme
>
>
> On Fri, May 31, 2013 at 9:21 AM, Sylvain Bauza <sylvain.bauza@xxxxxxxxxxxx
> > wrote:
>
>> Putting openstack-ops@ in the loop :-)
>>
>> Le 30/05/2013 17:26, Sylvain Bauza a écrit :
>>
>>  Le 30/05/2013 15:25, Sylvain Bauza a écrit :
>>>
>>>> Hi,
>>>>
>>>> It sounds quite unclear for me about the possibility *in Folsom* to
>>>> have two distinct Cinder hosts having each one LVM backend called
>>>> cinder-volumes ?
>>>>
>>>> As per the doc [1], I would say the answer is no, but could you please
>>>> confirm ?
>>>>
>>>> If so, do you have any idea on how to trick a nearly full LVM
>>>> cinder-volumes VG ? (I can't hardly add a new disk for adding a second PV).
>>>>
>>>> Thanks,
>>>> -Sylvain
>>>>
>>>> [1] :
>>>> http://docs.openstack.org/grizzly/openstack-block-storage/admin/content/multi_backend.html
>>>>
>>>
>>> Replying to myself. As per [2], it seems having a multiple cinder-volume
>>> setup in Folsom is achiveable. Could someone from Cinder confirm that this
>>> setup is OK ?
>>>
>>> [2] : https://lists.launchpad.net/openstack/msg21825.html
>>>
>>
>>
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>
>