[ Thanks to Falko
Timme for this link. ]
The following will install and configure DRBD, OpenAIS, Pacemaker and
Xen on OpenSUSE 11.1 to provide highly-available virtual
machines. This setup does not utilize Xen’s live migration
capabilities. Instead, VMs will be started on the secondary node as
soon as failure of the primary is detected. Xen virtual disk images
are replicated between nodes using DRBD and all services on the
cluster will be managed by OpenAIS and Pacemaker. The following
setup utilizes DRBD 8.3.2 and Pacemaker 1.0.4. It is important to
note that DRBD 8.3.2 has come a long way since previous versions in
terms of compatibility with Pacemaker. In particular, a new DRBD
OCF resource agent script and new DRBD-level resource fencing
features. This configuration will not work with older releases of
DRBD.