Comment 7 for bug 1415079

Im expreriencing this bug in my lab
omartsyniuk@tpi86:~$ dos.py snapshot --snapshot-name=test 6.1-97_Ubuntu_setup
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
libvirt: QEMU Driver error : operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'
Traceback (most recent call last):
  File "/usr/bin/dos.py", line 22, in <module>
    Shell().execute()
  File "/usr/lib/python2.7/dist-packages/devops/shell.py", line 30, in execute
    self.commands.get(self.params.command)(self)
  File "/usr/lib/python2.7/dist-packages/devops/shell.py", line 71, in do_snapshot
    self.params.snapshot_name)
  File "/usr/lib/python2.7/dist-packages/devops/models.py", line 138, in snapshot
    node.snapshot(name=name, description=description, force=force)
  File "/usr/lib/python2.7/dist-packages/devops/models.py", line 356, in snapshot
    node=self, name=name, description=description)
  File "/usr/lib/python2.7/dist-packages/devops/helpers/retry.py", line 27, in wrapper
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/devops/driver/libvirt/libvirt_driver.py", line 365, in node_create_snapshot
    domain.snapshotCreateXML(xml, 0)
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2290, in snapshotCreateXML
    if ret is None:raise libvirtError('virDomainSnapshotCreateXML() failed', dom=self)
libvirt.libvirtError: operation failed: Failed to take snapshot: Error while creating snapshot on 'drive-virtio-disk1'
Error while creating snapshot on 'drive-virtio-disk2'