19.5.4. Install the mod_cluster Module Into Apache HTTP Server or JBoss Enterprise Web Server (RPM)

Prerequisites

  • To perform this task, you must be using the Apache HTTP Server installed in Red Hat Enterprise Linux 6, JBoss Enterprise Web Server, or the standalone Apache HTTP Server included as a separate downloadable component of JBoss EAP 6.
  • If you need to install Apache HTTP Server in Red Hat Enterprise Linux 6, use the instructions from the Red Hat Enterprise Linux 6 Deployment Guide.
  • If you need to install the standalone Apache HTTP Server included as a separate downloadable component of JBoss EAP 6, refer to Section 19.3.2, “Install the Apache HTTP Server included with JBoss EAP 6 (Zip)” .
  • If you need to install JBoss Enterprise Web Server, use the instructions from the JBoss Enterprise Web Server Installation Guide.
  • You must be logged in with administrative (root) privileges.
  • You must have an active subscription to the jbappplatform-6-ARCH-server-VERS-rpm RHN channel.
The RPM installation method is similar between Red Hat Enterprise Linux 5 and 6, only requiring minor variations for Red Hat Enterprise Linux 6 users who have Apache HTTP Server 2.2.15 installed.
  1. Install the mod_cluster-native package using YUM:
    yum install mod_cluster-native
    
  2. Apache HTTP Server 2.2.15:
    • If you choose to stay on Apache HTTP Server 2.2.15, you must disable the mod_proxy_balancer module loaded by default by commmenting the LoadModule proxy_balancer_module line in the httpd.conf file.
      Either edit the file manually or use the following command:
      sed -i 's/^LoadModule proxy_balancer_module/#LoadModule proxy_balancer_module/;s/$//' /etc/httpd/conf/httpd.conf
      
    • If you choose to upgrade to Apache HTTP Server 2.2.26, install the latest version using the following command.
      yum install httpd
  3. To have the Apache HTTP Server service start at boot, enter the following command:
    • For Red Hat Enterprise Linux 5 and 6:
      service httpd add
    • For Red Hat Enterprise Linux 7:
      systemctl enable httpd22.service
  4. Start the mod_cluster balancer with the following command:
    • For Red Hat Enterprise Linux 5 and 6:
      service httpd start
    • For Red Hat Enterprise Linux 7:
      systemctl start httpd22.service