[Engine-devel] [vdsm] How to handle qemu 1.3 dep for Gluster Storage Domain

[Sahina Bose]

[Adding engine-devel]

On 08/06/2013 10:48 AM, Deepak C Shetty wrote:
> Hi All,
>     There were 2 learnings from BZ 
> https://bugzilla.redhat.com/show_bug.cgi?id=988299
>
> 1) Gluster RPM deps were not proper in VDSM when using Gluster Storage 
> Domain. This has been partly addressed
> by the gluster-devel thread @ 
> http://lists.gnu.org/archive/html/gluster-devel/2013-08/msg00008.html
> and will be fully addressed once Gluster folks ensure their packaging 
> is friendly enuf for VDSM to consume
> just the needed bits. Once that happens, i will be sending a patch to 
> vdsm.spec.in to update the gluster
> deps correctly. So this issue gets addressed in near term.
>
> 2) Gluster storage domain needs minimum libvirt 1.0.1 and qemu 1.3.
>
> libvirt 1.0.1 has the support for representing gluster as a network 
> block device and qemu 1.3 has the
> native support for gluster block backend which supports gluster://... 
> URI way of representing a gluster
> based file (aka volume/vmdisk in VDSM case). Many distros (incl. 
> centos 6.4 in the BZ) won't have qemu
> 1.3 in their distro repos! How do we handle this dep in VDSM ?
>
> Do we disable gluster storage domain in oVirt engine if VDSM reports 
> qemu < 1.3 as part of getCapabilities ?
> or
> Do we ensure qemu 1.3 is present in ovirt.repo assuming ovirt.repo is 
> always present on VDSM hosts in which
> case when VDSM gets installed, qemu 1.3 dep in vdsm.spec.in will 
> install qemu 1.3 from the ovirt.repo
> instead of the distro repo. This means vdsm.spec.in will have qemu >= 
> 1.3 under Requires.
>
Is this possible to make this a conditional install? That is, only if 
Storage Domain = GlusterFS in the Data center, the bootstrapping of host 
will install the qemu 1.3 and dependencies.

(The question still remains as to where the qemu 1.3 rpms will be available)

> What will be a good way to handle this ?
> Appreciate your response
>
> thanx,
> deepak
>
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