We used XMPP to orchestrate servers and runtimes at one of my previous employers. I might be romanticizing it in my memory a bit, but I remember it fondly. We

We used XMPP to orchestrate servers and runtimes at one of my previous employers. I might be romanticizing it in my memory a bit, but I remember it fondly. We would run ejabberd servers and could easily know which nodes were up and talk/send commands to them.