Mastering Kubernetes - Second Edition

Object count quota

Kubernetes has another category of resource quotas, which is API objects. My guess is that the goal is to protect the Kubernetes API server from having to manage too many objects. Remember that Kubernetes does a lot of work under the hood. It often has to query multiple objects to authenticate, authorize, and ensure that an operation doesn't violate any of the many policies that may be in place. A simple example is pod scheduling based on replication controllers. Imagine that you have 1 billion replication controller objects. Maybe you just have three pods and most of the replication controllers have zero replicas. Still, Kubernetes will spend all its time just verifying that indeed all those billion replication controllers ...