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Sysadmin/Migrate virtual machine (view source)
Revision as of 20:49, 14 August 2010
, 20:49, 14 August 2010no edit summary
== How to migrate a file-based guest to LVM ==
== How to migrate a file-based guest to LVM ==
* First, create the logical volume and attach it to the running VM:
treehouse# scp lightwave:/boot/{vmlinuz,initrd}-2.6.31-22-server /srv/vm/kernel/ubuntu/
treehouse# scp lightwave:/boot/{vmlinuz,initrd}-2.6.31-22-server /srv/vm/kernel/ubuntu/
treehouse# virsh attach-disk lightwave /dev/treehouse/lightwave-root vdc
treehouse# virsh attach-disk lightwave /dev/treehouse/lightwave-root vdc
treehouse# virsh console lightwave
treehouse# virsh console lightwave
* From within the VM, format the new volume and move things over
lightwave# mkfs.ext4 -L lightwave-root -O flex_bg,extent,uninit_bg,sparse_super /dev/vdc
lightwave# mkfs.ext4 -L lightwave-root -O flex_bg,extent,uninit_bg,sparse_super /dev/vdc
lightwafe# umount /mnt
lightwafe# umount /mnt
lightwave# ^D
lightwave# ^D
* Then edit the VM configuration to make it boot without GRUB, using externally provided kernel and initrd:
treehouse# virsh edit lightwave
treehouse# virsh edit lightwave
...
...
</devices>
</devices>
* Reboot
#treehouse virsh destroy lightwave
#treehouse virsh destroy lightwave