I am upgrading from a version of Linux-HA which supported nice_failback to one that supports auto_failback. How to I avoid a flash cut in this upgrade?
To upgrade from a pre-auto_failback version of Heartbeat to one which supports auto_failback, the following procedures are recommended to avoid a flash cut on the whole cluster. • Stop Heartbeat on one node in the cluster. • Upgrade this node. If the other node has nice_failback on in ha.cf then set auto_failback off in the new ha.cf file. If the other node in the cluster has nice_failback off then set auto_failback legacy in the new ha.cf file. • Start the new version of Heartbeat on this node. • Stop Heartbeat on the other node in the cluster. • Upgrade this second node in the cluster with the new version of Heartbeat. Set auto_failback the same as it was set in the previous step. • Start Heartbeat on this second node in the cluster. • If you set auto_failback to on or off, then you are done. Congratulations! • If you set auto_failback legacy in your ha.cf file, then continue as described below… • Schedule a time to shut down the entire cluster for a few seconds. • At the scheduled
