Actually, there is one central controller for OpenWRT: OpenWISP.
You can try it out using https://github.com/openwisp/vagrant-openwisp2.
The community is pretty active too.
In the future we would like to support other systems too (we have experimental configuration backends for Raspbian and Ubiquiti AirOS) but at the moment we're focusing on OpenWRT since it's the most widely deployed Linux system for networks.
I hope this helps.