RE: [Xen-users] Convert existing System to PV

[Jeff Sturm <jeff.sturm@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Wolf Grossi
> Sent: Tuesday, February 01, 2011 9:38 AM
> 
> Is there a tutorial how to create a domU from an existing system
(SUSE-9.3)?
> It should decribe all the steps from the very begin: copy the exiting
system to an
> image etc, etc.

There are several ways to do it--I've usually gone with a single root
filesystem on a dom0 logical volume.  Rough steps are as follows:

- Install kernel-xen package
- Create a filesystem for the domU, and mount it somewhere
- Stop services on the physical host (so that disk writes are kept to a
minimum) and begin copying files from /, skipping /proc etc.
- Adjust files on the domU image for PV devices:  /etc/fstab,
/etc/inittab, /etc/sysconfig/network/ifcfg-*
- Create a Xen configuration with the correct root fs, xen kernel and
ramdisk
- Unmount the domU FS.  Start the new domU and see what breaks, if
anything.

FWIW, we just tried this on a SUSE 9.4 host.  It was a disaster--the
SUSE kernel-xen package rendered the domU slow and unstable.  We ended
up migrating the services to a CentOS domU instead.

-Jeff



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