Aiming for Qemu 2.0 in 14.04

[Serge Hallyn]

Quoting Jamie Strandboge (jamie at canonical.com):
> On 02/26/2014 12:40 PM, Serge Hallyn wrote:
> > Hi,
> > 
> > as shown https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1284793
> > we are hoping to get Qemu 2.0 into 14.04.  This is tricky due to
> > the timing - Qemu 2.0 release is scheduled for April 4
> > ( http://wiki.qemu.org/Planning/2.0 ), with freeze for 14.04 being
> > April 10.  However, the drastic reduction in patches carried in
> > the package, given the length of the LTS cycle, would be worthwhile.
> > 
> > In an attempt to shake out bugs as early as possible, I've started
> > building packages based on current git HEAD at ppa:ubuntu-virt/candidate.
> > This seems to be testing quite well for me on amd64.  It would be
> > great if people could start testing the version in this ppa where
> > possible, as early as possible.
> > 
> > If we do run into bugs, we can hopefully get them fixed upstream before
> > release.  If we can't get them fixed, then we'll know to stick with the
> > 1.7 based qemu for 14.04.
> > 
> 
> Seems that libvirt snapshots are not working correctly with
> 2.0~git-20140307.4c288ac-0ubuntu2. Eg:
> 
> $ virsh snapshot-create-as test-saucy-amd64 pristine "uvt snapshot"
> error: internal error: Child process (/usr/bin/kvm-img snapshot -c pristine
> /home/jamie/vms/machines/test-saucy-amd64.qcow2) unexpected exit status 1:
> libvirt:  error : cannot execute binary /usr/bin/kvm-img: No such file or directory
> 
> /usr/bin/kvm-img used to be part of qemu-utils, but
> 2.0~git-20140307.4c288ac-0ubuntu2 doesn't ship it.
> 
> Creating a symlink to /usr/bin/qemu-img from /usr/bin/kvm-img makes this error
> go away and things seem to work, but I've not reviewed/tested if this is the
> correct fix.

Ah.  So the choice of kvm-img or qemu-img appears to be stored in
the qemu-driver.  Can you restart libvirt and see if that fixes it
for you?