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Sysadmin/Migrate virtual machine (view source)
Revision as of 13:21, 9 December 2009
, 13:21, 9 December 2009Created page with '== How to migrate a KVM machine from an LVM partition == (untested procedure) First, shutdown the VM, then do: mount /dev/treehouse/beamrider-root /mnt ssh housetree mount /…'
== How to migrate a KVM machine from an LVM partition ==
(untested procedure)
First, shutdown the VM, then do:
mount /dev/treehouse/beamrider-root /mnt
ssh housetree mount /dev/housetree/beamrider-root /mnt
rsync -PHAXphax --delete --numeric-ids /mnt/ housetree:/mnt/
rsync -a /etc/libvirt/qemu/beamrider.xml housetree:/etc/libvirt/qemu/
umount /mnt
ssh housetree umount /mnt
Then log to $OTHERHOST and create the domain in virsh.
Downtime can be reduced to just a few minutes by doing a first rsync
iteration from within the VM while it's still running.
Make sure you pass all the fancy switches to rsync or you'll loose
information on the copy.
(untested procedure)
First, shutdown the VM, then do:
mount /dev/treehouse/beamrider-root /mnt
ssh housetree mount /dev/housetree/beamrider-root /mnt
rsync -PHAXphax --delete --numeric-ids /mnt/ housetree:/mnt/
rsync -a /etc/libvirt/qemu/beamrider.xml housetree:/etc/libvirt/qemu/
umount /mnt
ssh housetree umount /mnt
Then log to $OTHERHOST and create the domain in virsh.
Downtime can be reduced to just a few minutes by doing a first rsync
iteration from within the VM while it's still running.
Make sure you pass all the fancy switches to rsync or you'll loose
information on the copy.