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CKA study material · question 1 of 1000

Which control plane component holds the authoritative record of all cluster state that the API server persists?

  1. etcd
  2. kubelet
  3. kube-controller-manager
  4. kube-scheduler
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Answer: A. etcd

etcd is the key-value store behind the API server, which is why backing up etcd backs up the cluster.

Source: Cluster Architecture (Kubernetes) — Control plane components › etcd

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