"Magic tools" are great for streamlining repetitive, error-prone work. And there's no doubt that "configuration management" across a big stable of servers is near the top of that list. But, you'd better be sure that you know at all times what is really going on. It is very, very easy to make an "innocent" mistake with these power-tools that instantly has far-flung implications. For instance, it's absolutely necessary that you put the configuration files under git version-control, and that you very-carefully track them in your change management system.