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CKA study material · question 402 of 1000

kubectl top returns no data at all in a new cluster. What is the likeliest cause?

  1. RBAC is blocking the kubelet
  2. The Pods have no resource requests
  3. metrics-server is not installed
  4. The nodes are running an old kubelet
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Answer: C. metrics-server is not installed

kubectl top is not a built-in capability of the API server; it needs metrics-server present.

Source: Tools for Monitoring Resources (Kubernetes) — Resource metrics pipeline

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