By default, Circus doesn’t secure its messages when sending information through ZeroMQ. Before running Circus in a production environment, make sure to read the Security page.
Circus can be deployed using Python 2.6, 2.7, 3.2 or 3.3 - most deployments out there are done in 2.7. To learn how to deploy Circus, check out Deployment.
To manage a Circus daemon, you should get familiar with the list of commands you can use in circusctl. Notice that you can have the same help online when you run circusctl as a shell.
For quick watcher and process management – start, stop, increment, decrement etc – there is a Tcl/Tk interface. See Ringmaster.