Re: [fedora-virt] How to revert an external snapshot
On Wed, Mar 04, 2015 at 05:43:30PM +0100, Dario Lesca wrote:
Il giorno mer, 04/03/2015 alle 09.49 -0500, Cole Robinson ha
scritto:
> On 03/04/2015 09:16 AM, Dario Lesca wrote:
> > I have generate an external snapshot with this command:
> > ...
> > There is some way to revert my vm to previous state?
> You can do it by hand: Power off the VM, edit the XML to point at the desired
> disk image.
Ok, thanks Cole, I have modify the point at the disk image to original
root disk image:
before "<source file='/virt/win7-64-snap1.qcow2'/>"
after "<source file='/virt/win7-64.qcow2'/>"
Then I have remove the image overlay /virt/win7-64-snap1.qcow2
Now all work fine.
> However, if you point at the root file and make disk changes, the snapshot
> overlay will then become invalid. So if you want to use the root contents
> again, you'll need to create another overlay based on the root image, and
> point your VM at that. This confusion is one of the reasons that stuff isn't
> implemented in libvirt yet
But now when I list snapshot the snapshot removed is showed:
> [root@dodo:/virt]# virsh snapshot-list win7-64
> Nome Creation Time Stato
> ------------------------------------------------------------
> win7-64-snap1 2015-03-04 14:21:15 +0100 shutoff
So, I have remove the machine and recreate it and the snapshot is gone
away.
Thanks for help.
Along with what Cole said, here is some more explanation
into revert/deletion of external snapshots (written by Eric Blake)
http://wiki.libvirt.org/page/I_created_an_external_snapshot,_but_libvirt_...
And, also look up the archives of 'libvirt-users' mailing list for
similar questions -- there's lot of useful info there too.
--
/kashyap