How to do it...

Perform these steps on any Pacemaker node as the root user:

  1. Add an e-mail primitive to Pacemaker with crm:
        crm configure primitive pg_mail ocf:heartbeat:MailTo \
            params email="dbas@mycompany.com" \
                  subject="Pacemaker\ cluster\ status\ changed:\ "
  1. Clean up any errors that might have accumulated with crm:
        crm resource cleanup pg_mail
  1. Display the status of our new e-mail alert with crm:
        crm resource status

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