Re: [Xen-users] How to migrate?

daniele patoner
Fri, 05 Aug 2005 08:01:31 -0000

Robert Fargher wrote:
 > Hi folks,
 >
 >   I''m in the process of learning Xen and am having a spot of
bother >
  >   with live
 > migration of a domU.  It may be just a blind spot in my (lack of)
 > understanding the documentation on migration but it makes no sense to
 > me.

Xen do not migrate the filesystem, the root filesystem of Rayah1 (domU)
must reside on a third  machine, and exported via NFS or DRBD
(http://sources.redhat.com/cluster/gnbd/gnbd_usage.txt), DRBD, ATA over
ethernet.

In brief

Set up a 3° machine, copy the rajah1 filesystem on 3° Machine and export
via NFS (for testing) or GNBD (production) to Rajah.

Test that Rajah e Kodiak are able to mount the remote filesystem.

Configure Rajah1 on Rajah to boot with the remote filesystem.

''Xm migrate Rajah1 kodiak'' move processes and ram to kodiak
but
disconnect(umount) the remote root filesystem in Rajak and
reconnect(mount) the root filesystem in kodiak.

Daniele