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

[John Mark Walker]

Hi, 

I share your frustration. Just as an FYI, the CentOS storage SIG is designed to address this exact issue. 

You can see the proposal here: 
http://wiki.centos.org/SpecialInterestGroup/Storage/Proposal 

We are moving rapidly on this. In fact, for those of you in the bay area, we will have storage SIG hacking as part of the Data Liberate hackathon: 

http://dataliberate.eventbrite.com/ 

I'm hopeful that we will have a full stack solution in a matter of weeks. Lalatendu, who is heading up the effort from our end, can give more details. 

Whether we can meet your timeline is another matter. However, if Debian/Ubuntu meet your needs better, as the impartial community guy it is my recommendation that you use the best tool for the job. 

-JM 

----- Original Message -----

> 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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