Re: [ovirt-users] CEPH rbd support in EL7 libvirt

[Nir Soffer]

On Sun, Oct 11, 2015 at 12:52 PM, Nux!  wrote:
> Hi folks,
>
> I was directed here by Sandro with the question in the $subject.
> As I could not find anything conclusive in either bugzilla or the 7.2 release 
> notes, can someone clarify this for me?
> At this point it's apparently as easy as rebuilding the libvirt src.rpm with 
> "with_storage_rbd 1".[1]
>
> I see users migrating from CentOS to Ubuntu because this is missing, it's not 
> even in technology preview.
> Kind of odd RH undermining their own projects in this way.
>
> [1] - 
> http://blog.widodh.nl/2015/04/rebuilding-libvirt-under-centos-7-1-with-rbd-storage-pool-support/

RHEL 7.1 supports rbd out of the box; so should be current CentOS 7.

We do not use libvirt storage pool for ovirt, so I don't think you
need to build anything.

Also, we do not access rbd volumes via libvirt. When we run vms using
rbd: volumes, libvirt
pass the volume url to qemu, and qemu access the volume. So we may not
need any rbd
support in libvirt itself.

Did you try to use ceph with ovirt 3.6 on CentOS?

Nir
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Re: [ovirt-users] CEPH rbd support in EL7 libvirt

[Nux!]

Hi Nir,

I have not tried to use Ovirt with Ceph, my question was about libvirt and was 
directed to ask the question here, sorry for the noise; I understand libvirt is 
not really ovirt's people concern.

The thing is qemu can do ceph rbd in EL7, libvirt does not, although support 
seems to be there and a simple rebuild enables it.
Was hoping you guys know more.

Lucian

--
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro

- Original Message -
> From: "Nir Soffer" <nsof...@redhat.com>
> To: "Nux!" <n...@li.nux.ro>
> Cc: "users" <users@ovirt.org>
> Sent: Monday, 12 October, 2015 09:05:00
> Subject: Re: [ovirt-users] CEPH rbd support in EL7 libvirt

> On Sun, Oct 11, 2015 at 12:52 PM, Nux! <n...@li.nux.ro> wrote:
>> Hi folks,
>>
>> I was directed here by Sandro with the question in the $subject.
>> As I could not find anything conclusive in either bugzilla or the 7.2 release
>> notes, can someone clarify this for me?
>> At this point it's apparently as easy as rebuilding the libvirt src.rpm with
>> "with_storage_rbd 1".[1]
>>
>> I see users migrating from CentOS to Ubuntu because this is missing, it's not
>> even in technology preview.
>> Kind of odd RH undermining their own projects in this way.
>>
>> [1] -
>> http://blog.widodh.nl/2015/04/rebuilding-libvirt-under-centos-7-1-with-rbd-storage-pool-support/
> 
> RHEL 7.1 supports rbd out of the box; so should be current CentOS 7.
> 
> We do not use libvirt storage pool for ovirt, so I don't think you
> need to build anything.
> 
> Also, we do not access rbd volumes via libvirt. When we run vms using
> rbd: volumes, libvirt
> pass the volume url to qemu, and qemu access the volume. So we may not
> need any rbd
> support in libvirt itself.
> 
> Did you try to use ceph with ovirt 3.6 on CentOS?
> 
> Nir
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Re: [ovirt-users] CEPH rbd support in EL7 libvirt

[Sven Kieske]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1



On 12/10/15 10:13, Nux! wrote:
> Hi Nir,
> 
> I have not tried to use Ovirt with Ceph, my question was about
> libvirt and was directed to ask the question here, sorry for the
> noise; I understand libvirt is not really ovirt's people concern.
> 
> The thing is qemu can do ceph rbd in EL7, libvirt does not,
> although support seems to be there and a simple rebuild enables
> it. Was hoping you guys know more.
> 
> Lucian

I'd suggest to ask this on the virt-sig of centOS (cc'ed).

Why is there no rbd support in el7 libvirt? I don't know, maybe the
virt repo guys from centos can rebuild it (they already do rebuild
libvirt afaik, another flag might not hurt them ).

HTH


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Sven Kieske

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[ovirt-users] CEPH rbd support in EL7 libvirt

[Nux!]

Hi folks,

I was directed here by Sandro with the question in the $subject. 
As I could not find anything conclusive in either bugzilla or the 7.2 release 
notes, can someone clarify this for me?
At this point it's apparently as easy as rebuilding the libvirt src.rpm with 
"with_storage_rbd 1".[1]

I see users migrating from CentOS to Ubuntu because this is missing, it's not 
even in technology preview.
Kind of odd RH undermining their own projects in this way.

[1] - 
http://blog.widodh.nl/2015/04/rebuilding-libvirt-under-centos-7-1-with-rbd-storage-pool-support/

--
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro
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