Re: [libvirt-users] Can I move the disk image of the guest while it is running?
On 02/05/2014 08:58 AM, Gergely Horváth wrote:
Hello guys!
We want to move some guests' disk images to different locations (within
the same machine, locally), but we do not want to turn off the guests.
Can we do that while the guest is running, like live migration?
Yes, live storage migration is possible; although at the moment, qemu is
lacking a way to restart the operation if it fails midstream, so libvirt
only allows the operation if you are willing to temporarily make your
guest transient.
I did not find any related documentation or posts about it.
Let's say the guest has a disk at /ssd/image.raw
We want to move that to /hdd/image.raw
Is there any way to do that without interrupting the guest?
Not rigorously tested, but this should do it:
virsh dumpxml $dom > file
virsh undefine $dom
virsh blockcopy $dom /ssd/image.raw /hdd/image.raw \
--wait --verbose --pivot
virsh define file
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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