<!-- master -->
    <ha-policy>
      <replication>
        <master>
          <vote-on-replication-failure>true</vote-on-replication-failure>
          <check-for-live-server>true</check-for-live-server>
        </master>
      </replication>
    </ha-policy>

<!-- slave -->
<ha-policy>
      <replication>
        <slave>
          <vote-on-replication-failure>true</vote-on-replication-failure>
          <allow-failback>true</allow-failback>
        </slave>
      </replication>
    </ha-policy>