https://community.jboss.org/thread/231744

mod_cluster.conf

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

MemManagerFile "/tmp/httpd/cache/mod_cluster"

<IfModule manager_module>
  Listen 999.1.88.9:6666
  LogLevel debug
  <VirtualHost 999.1.88.9:6666>
    ServerName 999.1.88.9:6666

    <Location />
      Order deny,allow
      Deny from all
      Allow from all
    </Location>

    KeepAliveTimeout 60
    MaxKeepAliveRequests 0
    ServerAdvertise on
    AdvertiseFrequency 5
    ManagerBalancerName qacluster
    AdvertiseGroup 224.0.5.9:23364
    EnableMCPMReceive
    CreateBalancers 0

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

mod_proxy.conf

Listen 999.1.88.9:2081

<VirtualHost *:2081 >
    ServerName 999.1.88.9:2081
    ProxyRequests Off
    ProxyPreserveHost On
    LimitRequestFieldSize 20480
    ProxyIOBufferSize 21504
    ProxyPass / balancer://qacluster/
    ProxyPassReverse / balancer://qacluster/

    <Location />
        Allow from all
    </Location>

    <Location /balancer-manager>
        SetHandler balancer-manager
        Allow from all
    </Location>

    <Proxy balancer://qacluster>
        BalancerMember ajp://999.1.88.9:8009/ route=jboss-eap-6.1
        BalancerMember ajp://999.1.88.9:8110/ route=jboss-eap-6.1-2
        ProxySet lbmethod=byrequests
        ProxySet stickysession=JSESSIONID|jsessionid
    </Proxy>
</VirtualHost>

standalone-ha.xml

<subsystem xmlns="urn:jboss:domain:modcluster:1.1">
    <mod-cluster-config excluded-contexts="tses, /, ROOT, manager, docs, examples, host-manager, admin-console, invoker, jbossws, jmx-console, juddi, web-console" advertise-socket="modcluster" connector="ajp">
    <dynamic-load-provider>
        <load-metric type="busyness"/>
    </dynamic-load-provider>
    </mod-cluster-config>
</subsystem>