Metacontroller - Lightweight Kubernetes controllers as a service

Metacontroller is an add-on for Kubernetes that makes it easy to write and deploy custom controllers. While custom resources provide storage for new types of objects, custom controllers define the behavior of a new extension to the Kubernetes API. Just like the CustomResourceDefinition (CRD) API makes it easy to request storage for a custom resource, the Metacontroller APIs make it easy to define behavior for a new extension API or add custom behavior to existing APIs.