Hi John,

while I have no SLES12SP1 Xen cluster running ATM, I strongly advise to set up inter-node locking for Xen (see "(xend-domain-lock yes)" and "(xend-domain-lock-path /var/lib/images/vm_locks)" in /etc/xen/xend-config.sxp). That way, the xends on your Xen cluster nodes can verify that no other node is currently running the VM. Of course that directory which lock-path is pointing to needs to be on a shared disk with a cluster FS, i.e. OCFS2.

May I assume that you have set the meta attribute "allow-migrate" to "true" for the resources in question?

Regards,
Jens