Ok, this is weird. It looks like it dies on the first disk, which is the only one that actually gets its snapshot removed. Perhaps it is processing the first disk a second time?
# virsh qemu-monitor-command i-2-38-VM --hmp 'delvm 1' Error while deleting snapshot on device 'virtio-disk0': Can't find the snapshot On Mon, Jul 13, 2015 at 10:28 PM, Marcus <shadow...@gmail.com> wrote: > Hi all, > > I've recently been toying with VM snapshots, and have ran into an > issue. Given a VM with multiple disks, it seems a snapshot-create followed > by a snapshot-delete will only remove the qcow2 snapshot for the first disk > (or perhaps just the disk that contains the memory), not all of the disk > snapshots it created. Is this something people are aware of? > > In searching around, I found a bug report where snapshot-creates would > fail due to the qcow2 snapshot ids being inconsistent. That looks like it > is patched for 2.4 qemu ( > http://lists.nongnu.org/archive/html/qemu-devel/2015-03/msg04963.html), > this bug would trigger that one by leaving IDs around that are inconsistent > between member disks, but is not the same. > > At first I was snooping around the libvirt lists looking for an answer, > but found in the code that they're simply calling the qemu monitor to > handle snapshot deletes on active VMs. > > # virsh snapshot-create 7 > > Domain snapshot 1436792720 created > > > # virsh snapshot-list 7 > > Name Creation Time State > > ------------------------------------------------------------ > > 1436792720 2015-07-13 06:05:20 -0700 running > > > # virsh domblklist 7 > > Target Source > > ------------------------------------------------ > > vda > /mnt/2a270ef3-f389-37a4-942f-380bed9f70aa/e4d6e885-1382-40bc-890b-ad9c8b51a7a5 > > vdb > /mnt/2a270ef3-f389-37a4-942f-380bed9f70aa/7033e4c6-5f59-4325-b7e0-ae191e12e86c > > > # qemu-img snapshot -l > /mnt/2a270ef3-f389-37a4-942f-380bed9f70aa/e4d6e885-1382-40bc-890b-ad9c8b51a7a5 > > Snapshot list: > > ID TAG VM SIZE DATE VM CLOCK > > 1 1436792720 173M 2015-07-13 06:05:20 00:01:10.938 > > > # qemu-img snapshot -l > /mnt/2a270ef3-f389-37a4-942f-380bed9f70aa/7033e4c6-5f59-4325-b7e0-ae191e12e86c > > Snapshot list: > > ID TAG VM SIZE DATE VM CLOCK > > 1 1436792720 0 2015-07-13 06:05:20 00:01:10.938 > > > # virsh snapshot-delete 7 1436792720 > > Domain snapshot 1436792720 deleted > > > # qemu-img snapshot -l > /mnt/2a270ef3-f389-37a4-942f-380bed9f70aa/e4d6e885-1382-40bc-890b-ad9c8b51a7a5 > > # qemu-img snapshot -l > /mnt/2a270ef3-f389-37a4-942f-380bed9f70aa/7033e4c6-5f59-4325-b7e0-ae191e12e86c > > Snapshot list: > > ID TAG VM SIZE DATE VM CLOCK > > 1 1436792720 0 2015-07-13 06:05:20 00:01:10.938 >
