The requirements for implementing Apache proxy load balancing are:
  • Properly configured Apache HTTP Server

    You configure a load balancing Apache HTTP Server (Apache) with a list of available PAS for OpenEdge instances. In addition, specify whether you want subsequent requests to return to the same instance (session-managed; sticky sessions in Apache documentation), or to any available instance (session-free).

    If you run one or more web application available to the public, then install Apache in a demilitarized zone (DMZ) with the PAS for OpenEdge instances running behind a second firewall.

  • Properly configured PAS for OpenEdge instances

    Configuration of instances is contingent on whether sticky sessions are enabled on the Apache load balancer. All the instances must be configured to match the session type of the load balancer.