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Why is an etcd snapshot the backup that matters most for a cluster?

  1. It contains the container images
  2. It records the Pod logs
  3. It captures the kubelet's local state
  4. Every Kubernetes object is stored in etcd
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Answer: D. Every Kubernetes object is stored in etcd

All Kubernetes objects live in etcd, so its snapshot is what restores a cluster after losing the control plane.

Source: Operating etcd clusters for Kubernetes (Kubernetes) — Backing up an etcd cluster

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