On 03/28/2014 05:37 PM, Dave Christianson wrote:
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.
Yes, even I was frustrated at this. There seems no way to utilize the
image file using libgfapi.
As Harsha mentioned in his earlier thread, libvirt is yet to expose this.
I have already raised a bug regarding this,
https://bugzilla.redhat.com/show_bug.cgi?id=1017308
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.
With RHEL 6.5 / Centos 6.5 you can use, "/usr/libexec/qemu-kvm"
This was the command that I used to make use of VM Images using libgfapi
in RHEL 6.5
>> /usr/libexec/qemu-kvm -drive
file=gluster://10.70.37.87/testvol/test.img,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,werror=stop,rerror=stop,aio=threads
-device
virtio-blk-pci,scsi=off,bus=pci.0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=0
The above worked for me.
If I am not wrong, the libvirt in RHEL 7 supports glusterfs's libgfapi
way of access mechanism.
-- Satheesaran
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
<[email protected] <mailto:[email protected]>> 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
<[email protected]
<mailto:[email protected]>> 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?
>
> _______________________________________________
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> [email protected] <mailto:[email protected]>
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--
Religious confuse piety with mere ritual, the virtuous confuse
regulation with outcomes
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