Am 10.06.13 10:40, schrieb Kashyap Chamarthy: > On 06/10/2013 01:20 PM, Thomas Stein wrote: >> Am 10.06.13 09:07, schrieb Kashyap Chamarthy: >>> On 06/09/2013 02:46 PM, Thomas Stein wrote: >>>> Hello. >>>> >>>> I just tried the following: >>>> >>>> virsh dumpxml --security-info gentoo-template > gentoo-template.xml >>>> virsh snapshot-create gentoo-template >>>> virsh undefine gentoo-template >>> >>> Wait - is that really the command you used after "snapshot-create" ? >> >>> Because: You cannot undefine a guest with a snapshot without first deleting its metadata >>> >>> To cleanly delete, maybe you should've done: >>> >>> $ virsh snapshot-delete --domain gentoo-template SNAPSHOTID --metadata >> >> Did that. But that deletes that snapshot too, no? > > Yes. (I just understood what you wanted to do). Noted my details below. > > >> >>> >>>> virsh blockcopy gentoo-template vda >>>> /opt/virt-backup-blockcopy/gentoo-template/gentoo-template.qcow2 --wait --verbose --finish >>>> virsh define gentoo-template.xml >>> >>> Can you also paste the output of: >>> >>> $ qemu-img info --backing-chain \ >>> /opt/virt-backup-blockcopy/gentoo-template/gentoo-template.qcow2 >> >> hn ~ # qemu-img info --backing-chain >> /opt/virt-backup-blockcopy/gentoo-template/gentoo-template.qcow2 >> image: /opt/virt-backup-blockcopy/gentoo-template/gentoo-template.qcow2 >> file format: qcow2 >> virtual size: 130G (139586437120 bytes) >> disk size: 30G >> cluster_size: 65536 >> >> Just to make myself clear. I want to backup the qcow image /with/ the >> internal snapshot. Is that even possible with blockcopy? > > Let's try. I just did the below test (also I noted it in the URL below) > > # Take an (internal) snapshot when the guest was shutdown Okay. So even a snapshot taken while the machine is off is not preserved. That's a pity. Thank you anyway . best regards t. > $ virsh snapshot-list fed18 > Name Creation Time State > ------------------------------------------------------------ > 1370847718 2013-06-10 12:31:58 +0530 shutoff > > > # Start the guest > $ virsh start fed18 > > > # Undefine the guest while it is running - this will > # make the guest transient (libvirt expects it to be 'transient') > $ virsh undefine fed18 > Domain fed18 has been undefined > > > # List the guest > root@~$ virsh list > Id Name State > ---------------------------------------------------- > 3 fed18 running > > $ > > > # Do blockcopy (it's only when the guest is "live") > $ virsh blockcopy --domain fed18 vda \ > /export/backup/images/fed18.qcow2 --wait --finish --verbose > Block Copy: [ 100 %] > > > # Query the info of original image: > =========== > root@~$ qemu-img info --backing-chain /var/lib/libvirt/images/el6box1.qcow2 > image: /var/lib/libvirt/images/el6box1.qcow2 > file format: qcow2 > virtual size: 10G (10737418240 bytes) > disk size: 1.2G > cluster_size: 65536 > Snapshot list: > ID TAG VM SIZE DATE VM CLOCK > 1 1370853048 0 2013-06-10 14:00:48 00:00:00.000 > =========== > $ qemu-img snapshot -l /var/lib/libvirt/images/el6box1.qcow2 > Snapshot list: > ID TAG VM SIZE DATE VM CLOCK > 1 1370853048 0 2013-06-10 14:00:48 00:00:00.000 > =========== > > # Query info of the backup: > =========== > $ qemu-img info --backing-chain /export/backup/images/el6box1-back.qcow2 > image: /export/backup/images/el6box1-back.qcow2 > file format: qcow2 > virtual size: 10G (10737418240 bytes) > disk size: 10G > cluster_size: 65536 > =========== > $ qemu-img snapshot -l /export/backup/images/el6box1-back.qcow2 > =========== > > Hm, from what it looks, it doesn't appear to preserve the internal snapshot.. > >> >>> http://kashyapc.fedorapeople.org/virt/lc-2012/live-backup-with-blockcopy.txt >>> > > > _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
