While upgrading, it is important to recall that the monolithic Heartbeat 2.1 tree has been split up into modular parts. Thus you will replace Heartbeat with three individual pieces of software: Cluster Glue, Pacemaker, and Heartbeat 3 which comprises just the cluster messaging layer.

If this is the last node to be upgraded in your cluster, and your package management system did not restart Heartbeat services after the software upgrade, you should now proceed to Section 4.2.7, “Restarting Heartbeat services”. Otherwise, you should move to the next node and proceed as outlined in Section 4.2.3, “Stopping Heartbeat services” and Section 4.2.6, “Upgrading software”.