[Gluster-users] Possible to use libgfapi with libvirt in CentOS 6.5?

[Dave Christianson]

I've come across individual posts from people who supposedly have done this
in CentOS6.5. Basically, all that is shown in the posts is the XML file
generated, no mention of *how* that file is generated. Virt-manager has no
provision for attaching directly to the gluster volume except as a mount.
Neither virt-manager nor virt-install recognize the gluster:// type.

Supposedly earlier versions of RHEL used qemu-kvm as a wrapper for
qemu-system-x86_64, however in 6.5 qemu-kvm is its own binary. Qemu-kvm
also doesn't recognize the gluster:// type.

Debian and Ubuntu supposedly have the newer versions of gluster and
qemu/libvirt availabe (ppa's?). Maybe I'll test Wheezy...

Red Hat seems content to do their own thing. Although the verisons of
libvirt and qemu are older, libgfapi is supposed to have been backported.
It's a shame that full functionality is not included. It's mindboggling
seeing that Red Hat owns glusterfs, you would think full support for the
backend would have been included in their product. If it is, as you say,
that RH includes this functionality only to RHN subscribers and is not made
available downstream to CentOS/SL, and unless I can find a repository with
the latest full versions of qemu & libvirt, then CentOS simply will not
work.


On Fri, Mar 28, 2014 at 3:13 AM, Harshavardhana
<harsha at harshavardhana.net>wrote:

> Virt-manager / libvirt is yet to expose perhaps this functionality -
> but as far as i remember libvirt should be doing this as a
> pass-through for the URL's which have been passed  as
> "<schema>://<server>/<volname>"
>
> Does libvirt 'invoke' fuse when passed "gluster://" schema?
>
> On Thu, Mar 27, 2014 at 5:34 PM, Dave Christianson
> <davidchristianson3 at gmail.com> wrote:
> > Good Evening,
> >
> > I have read that libgfapi has been backported to qemu-kvm in RHEL 6.5
> (and
> > by virtue CentOS and SL). However I am unable to figure out how to
> actually
> > make it work as described. Virt-manager still only seems to support
> > glusterfs volumes via fuse.
> >
> > I can use qemu-img to create a disk image on gluster://<server>/<Volume>.
> > But virt-manager can only use it from a fuse mounted fileshare. There
> seems
> > to be no ability to attach in virt-manager directly to the image on
> > glusterfs using libgfapi.
> >
> > All documents I've found describe the use of the command
> > "qemu-system-x86_64," however that command does not exist in CentOS 6.5.
> > That appears to be the only way to start the domain using libgfapi. So
> > basically, I can create an image via libgfapi but cannot do anything
> useful
> > with it.
> >
> > Should I be able to do this? If so, what's the procedure? Or is
> CentOS/RHEL
> > 6.5 just not fully integrated? I really want to be able to use libgfapi
> and
> > avoid the performance penalty of fuse. Should I just grab & compile the
> > latest verisons of libvirt and qemu-kvm?
> >
> > _______________________________________________
> > Gluster-users mailing list
> > Gluster-users at gluster.org
> > http://supercolony.gluster.org/mailman/listinfo/gluster-users
>
>
>
> --
> Religious confuse piety with mere ritual, the virtuous confuse
> regulation with outcomes
>
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