[fedora-virt] How to revert an external snapshot

[Dario Lesca]

I have generate an external snapshot with this command:

> vm='win7-64'
> 
> virsh snapshot-create-as "$vm" "$vm-snap1" "snap1 description" \
>   --diskspec vda,file="/virt/$vm-snap1.qcow2" \
>   --disk-only --atomic

My virsh / libvirt is the last from Fedora 21

> [root at dodo:/virt]# virsh --version
> 1.2.9.2

Now I have this situation:

> [root at dodo:/virt]# ll win7-64*
> -rw-r--r-- 1 qemu qemu 17182753280  4 mar 14.14 win7-64.qcow2
> -rw-r--r-- 1 root root   558628864  4 mar 14.35 win7-64-snap1.qcow2
> 
> root at dodo:/virt]# virsh snapshot-list win7-64
>  Nome                 Creation Time             Stato
> ------------------------------------------------------------
>  win7-64-snap1        2015-03-04 14:21:15 +0100 shutoff

But if I run the revert command this is the result:

> [root at dodo:/virt]# virsh snapshot-revert win7-64 win7-64-snap1
> errore: unsupported configuration: revert to external snapshot not supported yet

There is some way to revert my vm to previous state?

Many thanks for help.

-- 
Dario Lesca
(inviato dal mio Linux Fedora 21 con Gnome 3.14)