Ready Wait Controller

A controller that waits for a given set of resources to be ready and prints the output.

It targets apps/v1 resources. The objective of the controller is to be able to monitor if all the provided apps/v1 types like StatefulSet, DaemonSet and Deployment have all their replicas up-to-date.

The use case is to be able to wait for an update to complete before proceeding with a provisioning tools like the cluster-lifecycle-manager project of Zalando.

TODO: The controller can either be imported as a package in your Go app or run as a CLI program.