I want to create a jboss cluster with haproxy load balancer in standalone mode. My question is in standalone-ha.xml file there is an extension for mod cluster
<extension module="org.jboss.as.modcluster"/> and there are sub systems for it. If i use haproxy as the load balancer do i have to create an extension
<extension module="org.jboss.as.haproxy"/> and subsytems in the standalone-ha.xml with the name haproxy?
You don't need a separate extension/subsystem to use haproxy. mod_cluster has its own subsystem because it works differently. For more, see: Chapter 1. Overview