Apache httpd configuration
3.1. Apache httpd configuration You need to load the modules that are needed for mod_cluster for example: LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_ajp_module modules/mod_proxy_ajp.so 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 mod_proxy and mod_proxy_ajp are standard httpd modules. mod_slotmem is a shared slotmem memory provider. mod_manager is the module that reads information from JBoss AS/JBossWeb/Tomcat and updates the shared memory information. mod_proxy_cluster is the module that contains the balancer for mod_proxy. mod_advertise is an additional module that allows httpd to advertise via multicast packets the IP and port where the mod_cluster is listening. This multi-module architecture allows the modules to easily be changed depending on what the customer wants to do. For example when using http instead of AJP, only LoadModule proxy_ajp_module modules/mod_proxy_ajp.so needs to be changed to: LoadModule proxy_http_module modules/mod_proxy_http.so