What is the purpose of the Kubernetes kube-controller-manager and what key controllers does it run?

Question

Kubernetes Fundamentals — Hard

What is the purpose of the Kubernetes kube-controller-manager and what key controllers does it run?

Accepted Answer

The kube-controller-manager is a crucial component that ensures cluster stability by running core control loops. It reconciles actual state with desired state through controllers like Node and Replication controllers. This binary manages multiple controllers, making option B the correct answer. Option A is incorrect as it describes the API server's role.