Hi,
I have a win10 guest on a fedora32 system and have some questions as I
explore using external snapshots as a form of backup in case of a
Windows failure (as in, it won't boot or is completely irrecoverable) as
well as revision control (to be able to rollback changes after a failed
app install, etc).
The first hit on Google for external snapshots involves a RHEL7 document
that talks about how it's not officially supported. The current RHEL8
docs don't include any references to snapshots.
The fedora docs I've found are many years old - I'm just not sure if
they're still applicable. Where can I find the current docs for fedora32?
- If I've already created a live internal snapshot, can I then create an
external safely? Are all changes currently being written to this
internal snapshot now?
- Can external snapshots be used for backup? Perhaps there are
predefined steps for doing this that I can follow?
This is the procedure I'm currently using. I've made a backup of the
original image - can I now just continue to backup the snapshots in the
eventuality of a crash, then use this original image backup and the
snapshots to restore it?
I suppose I would also periodically merge the snapshots back into the a
single snapshot to ease the process?
# virsh snapshot-create-as --domain dave-win10a win10a-state01
--diskspec
vda,file=/var/lib/libvirt/images/vm_snapshots/disk-overlay.qcow2,snapshot=external
--memspec
file=/var/lib/libvirt/images/vm_snapshots/mem-overlay.qcow2,snapshot=external
--atomic
Domain snapshot win10a-state01 created
# ls -lh vm_snapshots/
total 3.3G
-rw------- 1 qemu qemu 196K Jul 11 12:32 disk-overlay.qcow2
-rw------- 1 root root 3.3G Jul 11 12:32 mem-overlay.qcow2
Thanks,
Alex
