I recently setup a server to run multiple instance of IBM HTTP Server from a Single IHS Install.
Originally the servers looked like this,
IHS mod_jk connection to Apache Tomcat using context root /my-app/ using SSL certificate https://test1.acme.com/
The customer wanted to leverage the existing system to create a secondary test environment.
Virtual hosting was not an option, because the team was willing to change the domain name, but not the context root.