This chapter provides an example, along with step-by-step instructions on configuring an initial cluster across two nodes that are hosted on systems with the resolvable host names node1 and node2. Each system is installed and configured by using the instructions that are provided in Installing and Configuring Pacemaker and Corosync.

The cluster is configured to run a service, Dummy, that is included in the resource-agents package. You should have installed this package along with the pacemaker packages. This tool simply keeps track of whether the service is or is not running. Pacemaker is configured with an interval parameter that determines how long it should wait between checks to determine whether the Dummy process has failed.

The Dummy process is manually stopped outside of the Pacemaker tool to simulate a failure, which is used to demonstrate how the process is restarted automatically on an alternate node.