In order to fully capitalize on the benefits provided by having a DRBD-backed Xen VBD’s, it is recommended to have Heartbeat manage the associated domU’s as Heartbeat resources.
You may configure a Xen domU as a Pacemaker resource, and automate
resource failover. To do so, use the Xen
OCF resource agent. If you
are using the drbd
Xen device type described in this chapter, you
will not need to configure any separate drbd
resource for use by
the Xen cluster resource. Instead, the block-drbd
helper script will
do all the necessary resource transitions for you.