A Basic Single IP address Configuration

The most common, basic configuration is that of a high-availability server which simply provides a single IP address (1.2.3.4) to be failed over[1] between the nodes[2] of our cluster[3]. This is an ActivePassive[4] configuration - the most basic configuration.

Version 2 Configuration in /var/lib/heartbeat/crm/cib.xml

<cib>
  <configuration>
    <crm_config/>
    <nodes/>
    <resources>
      <primitive id="ip_resource" class="ocf" type="IPaddr" provider="heartbeat">
        <instance_attributes>
          <attributes>
            <nvpair name="ip" value="1.2.3.4"/>
          </attributes>
        </instance_attributes>
      </primitive>
    </resources>
    <constraints>
      <rsc_location id="run_ip_resource" rsc="ip_resource">
        <rule id="pref_run_ip_resource" score="100">
          <expression attribute="#uname" operation="eq" value="paul"/>
        </rule>
      </rsc_location>
    </constraints>
  </configuration>
  <status/>
</cib>

Explanation

See Also

GettingStarted/OneIPAddress[5].

---

This information provided courtesy of the Linux-HA project at http://linux-ha.org/