[Bug 1096125] [NEW] virsh create-snapshot fails

[Riccardo Casatta]

Public bug reported:

Hello,

i have a plain installation of Ubuntu 12.10 server,
i installed package ubuntu-virt-server and added the user to the kvm and libvirtd group. (qemu-kvm 1.2 libvirt 0.9.13)
After that i can run kvm virtual machines.

Now i am trying to get a snapshot of the disk (first step to achieve live backup of virtual machines)
virsh snapshot-create-as [vmname] snapshot1 "snapshot" --disk-only --atomic

but i am getting the following error:
error: internal error unable to execute QEMU command 'transaction': Could not open '/var/lib/libvirt/images/ubu1204.snapshot1'

(i even tryed with permission 777 )

** Affects: kvm (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  virsh create-snapshot fails

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