On Fri, Mar 04, 2011 at 10:31:18AM +0200, Jussi Hirvi wrote: > Is there any (easy?) way to migrate running standalone CentOS 4 or 5 > systems to xen virtual stacks? > > Rebuilding those systems from scratch on the xen machine would take > plenty of work. > If you're talking about Xen PV domUs, then the process is pretty much like this: - ssh into the standalone system. - make sure /etc/modprobe.conf includes xenblk driver (so that it'll be included in the generated initrd when you install kernel-xen). - fix /etc/fstab to have xvd* (xen virtual disk) devices instead of sd*. - install kernel-xen rpm. - verify kernel-xen is the default in /boot/grub/grub.conf. - verify root= parameter is correct in /boot/grub/grub.conf for kernel-xen. - copy/transfer all the files from the standalone system to virtual disk/image. - create a configuration file for the new domU, make it use pygrub bootloader, and make it use xvd* disks/devices. - done. -- Pasi