Re: [libvirt-users] Excluding RAW disk from snapshot

On 08/02/2012 10:53 AM, Trey Dockendorf wrote: Did you mean for this to go to the list? Others might benefit from the answer. >>> >>> <domainsnapshot> >>> <name>20120802</name> >>> <description>oVirt 3.1 upgrade</description> >>> <disks> >>> <disk name='vda' snapshot='yes' /> >>> <disk name='vdb' snapshot='no' /> >>> </disks> >>> </domainsnapshot> >>> >>> When I try the snapshot I get this error... >>> > Here's the new XML > > <domainsnapshot> > <name>20120802</name> > <description>oVirt 3.1 upgrade</description> > <disks> > <disk name='vdb' snapshot='no' /> > </disks> > </domainsnapshot> > Ah, right - snapshot is a tri-state: 'no', 'internal', and 'external', so 'yes' is not a valid state (although currently only 2 of the 3 states are supported for qemu: 'no' and 'external'). > Now I get this error > > > # virsh snapshot-create --disk-only dc-vmarchitect dc-vmarchitect_ss.xml > error: operation failed: Failed to take snapshot: unknown command: > 'snapshot_blkdev' That's a sign of your qemu being too old to support disk snapshots (older qemu only supports system checkpoint internal snapshots). > > I do not know if this could be an issue, but after this wasn't working > with libvirt-0.9.4, I did "yum update qemu-img qemu-kvm libvirt" and > am now at the versions listed in previous email. I did not do a full > system upgrade or reboot as this is a heavily loaded production > system. Is this the case where the VM is running as the previous > version of qemu-kvm ? > > Thanks > - Trey > -- Eric Blake eblake(a)redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org