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CKA study material · question 523 of 1000

How are Kubernetes' built-in controllers deployed in a standard cluster?

  1. As one process per controller, supervised by the kubelet
  2. As a DaemonSet with one Pod per node
  3. Inside a single kube-controller-manager binary
  4. As goroutines inside kube-apiserver
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Answer: C. Inside a single kube-controller-manager binary

The built-in controllers all run inside kube-controller-manager as one process, which is why leader election is done once for the whole set rather than per controller.

Source: Controllers (Kubernetes) — Ways of running controllers

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