Automated provisioning system. Distributed, git based.
One day, you are tired of setup your servers and keep it in up to date consistent state manually. You'll find such software as Chef or Puppet, which can help you to simplify your administrative tasks.
But sooner or later you'll find that strange DSL, centralization and complexity doesn't make sense.
Why don't just make something simple? Configs in plain files, simple cli interface, easy architecture. At the same time, we can make it more stable and fault resistant.