Even though some of the modules that we've written so far can be used on the Master, the focus has still been entirely on managing Minion-based operations. Even runners, which only run on the Master, were originally designed to script tasks between Minions.
There are two types of modules that are designed entirely for Master-side work: external authentication modules and wheel modules. In this chapter, we'll go over:
Adding external authentication to the Master
Troubleshooting external authentication modules
Managing Master configuration with wheel modules
Troubleshooting wheel modules