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Chapter 12. Working Examples

12.1. Complete Working Example
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Following are a set of example configuration files for a complete working example.
Load Balancer

A proxy server listening on localhost: 

LoadModule slotmem_module modules/mod_slotmem.so
LoadModule manager_module modules/mod_manager.so
LoadModule proxy_cluster_module modules/mod_proxy_cluster.so
LoadModule advertise_module modules/mod_advertise.so

Listen 127.0.0.1:6666
<VirtualHost 127.0.0.1:6666>

    <Directory />
        Order deny,allow
        Deny from all
        Allow from 127.0.0.1
    </Directory>

    KeepAliveTimeout 60
    MaxKeepAliveRequests 0

    ManagerBalancerName mycluster
    ServerAdvertise On
    AdvertiseFrequency 5
    EnableMCPMReceive On

<Location /mod_cluster-manager>
    SetHandler mod_cluster-manager
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
</Location>

</VirtualHost>
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Worker Configuration for Tomcat

Edit the $CATALINA_HOME/conf/server.xml file and add the following listener element to configure the worker for Tomcat: 

<Listener className="org.jboss.modcluster.container.catalina.standalone.ModClusterListener" advertise="true"/>
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Example iptables Firewall Rules

Following are a set of example firewall rules using iptables, for a cluster node on the 192.168.1.0/24 subnet. 

/sbin/iptables -I INPUT 5 -p udp -d 224.0.1.0/24 -j ACCEPT -m comment --comment "mod_cluster traffic"
/sbin/iptables -I INPUT 6 -p udp -d 224.0.0.0/4 -j ACCEPT -m comment --comment "JBoss Cluster traffic"
/sbin/iptables -I INPUT 9 -p udp -s 192.168.1.0/24 -j ACCEPT -m comment --comment "cluster subnet for inter-node communication"
/sbin/iptables -I INPUT 10 -p tcp -s 192.168.1.0/24 -j ACCEPT -m comment --comment "cluster subnet for inter-node communication"
/etc/init.d/iptables save
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