Each of these short recipes consists of two steps:
- Install Corosync and Pacemaker.
- Disable Corosync and Pacemaker on server boot.
While the first step makes sense, why do we need the second? When running a highly available cluster, caution is a beneficial attribute. A server may reboot for any number of reasons, and many of those include crashes that require further investigation.
Were Pacemaker to start immediately following a server reboot, we could potentially lose valuable diagnostic information. More importantly, a rebooted server should be considered in an unknown or potentially damaged state until it is examined by an experienced system administrator. We don't want a misbehaving server as part of our critical infrastructure. ...
