Our Subscription Manager utilises X509 certificates to define the product(s) a system is built upon/subscribed to. This is the subscription definition for Zuul

Scale-out component for executing jobs. At least one of these is required. Depending on system configuration, you can expect a single executor to handle up to about 100 simultaneous jobs. Can handle the functions of a merger if dedicated mergers are not provided. One or more of these must be run.

Scale-out component that performs git merge operations. Zuul performs a large number of git operations in the course of its work. Adding merger processes can help speed Zuul’s processing. This component is optional (zero or more of these can be run).

The main Zuul process. Handles receiving events, executing jobs, collecting results and posting reports. Coordinates the work of the other components. It also provides a gearman daemon which the other components use for coordination.