PostgreSQL 12 High Availability Cookbook - Third Edition

How it works...

This recipe differs from those in the previous sections in that we can execute these steps from any server. Commands issued by the crm utility are sent to the cluster itself, so any node will transmit them successfully and Pacemaker will act accordingly. In the case of our configuration changes, the only action that Pacemaker takes is to alter its stored settings.

The first thing we do is disable STONITH by calling crm with the configure property parameter for stonith-enabled. While STONITH is an amusing acronym, there are actual devices on the market that fill this role. These devices can isolate a node from a network in several ways, and Pacemaker is capable of interacting with them by default. As we don't have one right ...