Hi all!
I've been using libvirt for some time and until now I have treated
backups of virtual computers as if they where physical computers
installing the backup client on the guest. I am now however facing the
need to backup a couple a couple of guest at the host level so I've been
trying to catch up by reading, googling and by trial and error too. Up
to now I've been able to backup a live machine whith a command like the
following
virsh snapshot-create-as --domain test --name backup --atomic
--diskspec vda,snapshot=external --disk-only
This command creates a file test.backup and in the meantime I can backup
the original test.qcow2 but for what I saw this disk image is in a
"dirty" state, as if the machine I could restore from this file had been
turned off whithout a proper shutdown.
I know that I can later restore the machine to its original state by
issuing a command like this
virsh blockcommit --domain test vda --active --pivot
virsh snapshot-delete test --metadata backup
I have seen that it is possible to create the snapshot using a memspec
parameter which would make the backup of the guest as if it where in a
clean state, however I haven't found the equivalent of the blockcommit
for the memory file, in a sort of speak, to be able to restore the guest
to it's original state.
Thank you very much!
Best regards.
David Wells.
