On 09/24/2013 01:02 AM, 王根意 wrote:
Hey guys:
I have a running vm with ceph backend:
root@apc20-005:~# virsh list
Id Name State
----------------------------------
56 one-240 running
And *snapshot-create-as* works well:
root@apc20-005:~# virsh snapshot-create-as one-240
Domain snapshot 1380009353 created
But when exec *snapshot-revert*, error occurs:
root@apc20-005:~# virsh snapshot-revert one-240 1380009353
*error: operation failed: Error -22 while loading VM state*
And the vm went paused state.
root@apc20-005:~# virsh list
Id Name State
----------------------------------
56 one-240 paused
When I use qcow2 image backend, Everything is ok! Any idea?
This happens because libvirt/qemu try to load the memory state of the
vm, in addition to the disk state. RBD only saves the disk state, so
attempting to load the memory state fails.
There's a feature request for improving this [1].
You can revert the disk directly with the 'rbd rollback' command
instead.
Josh
[1] http://tracker.ceph.com/issues/2773
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