Having switched to Nginx a while ago, I was recently asked to use Apache for a client installation. There have been some significant changes in 2.4 from 2.2, include the 'Requires' option. I also wanted to create a virtualhost entry for Munin on this machine. It took a little while to figure this out, in particular on Apache 2.4. I'm also using the built-in cron task to generate graphs.