Two Apache Web Servers in an Active/Active Configuration

This configuration is for a high-availability server which provides two IP addresses (1.2.3.4, and 1.2.3.5) to be failed over between the nodes of our cluster, and an Apache server for each IP address. We will set this up as an active/active configuration.

Version 1 Configuration in /etc/ha.d/haresources

paul    1.2.3.4  apache::/apache1dir/httpd.cf
silas   1.2.3.5  apache::/apache2dir/httpd.cf

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

<cib>
  <configuration>
    <crm_config/>
    <nodes/>
    <resources>
      <group id="apache_group_1">
        <primitive id="ip_resource_1" class="ocf" type="IPaddr" provider="heartbeat">
          <instance_attributes>
            <attributes>
              <nvpair name="ip" value="1.2.3.4"/>
            </attributes>
          </instance_attributes>
        </primitive>
        <primitive id="apache" class="heartbeat" type="apache">
          <instance_attributes>
            <attributes>
              <nvpair name="1" value="/apache1dir/httpd.cf"/>
            </attributes>
          </instance_attributes>
        </primitive>
      </group>
      <group id="apache_group_2">
        <primitive id="ip_resource_2" class="ocf" type="IPaddr" provider="heartbeat">
          <instance_attributes>
            <attributes>
              <nvpair name="ip" value="1.2.3.5"/>
            </attributes>
          </instance_attributes>
        </primitive>
        <primitive id="apache" class="heartbeat" type="apache">
          <instance_attributes>
            <attributes>
              <nvpair name="1" value="/apache2dir/httpd.cf"/>
            </attributes>
          </instance_attributes>
        </primitive>
      </group>
    </resources>
    <constraints>
      <rsc_location id="run_apache_group_1" rsc="apache_group_1">
        <rule id="pref_run_apache_group_1" score="100">
          <expression attribute="#uname" operation="eq" value="paul"/>
        </rule>
      </rsc_location>
      <rsc_location id="run_apache_group_2" rsc="apache_group_2">
        <rule id="pref_run_apache_group_2" score="100">
          <expression attribute="#uname" operation="eq" value="silas"/>
        </rule>
      </rsc_location>
    </constraints>
  </configuration>
  <status/>
</cib>

Explanation

See Also

GettingStarted/TwoApaches

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