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CKA study material · question 466 of 1000

kubectl drain appears to hang on a node. What is a likely explanation?

  1. The Pods have no resource requests
  2. The API server is rate limiting kubectl
  3. A PodDisruptionBudget is blocking the eviction
  4. The node has already been cordoned
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Answer: C. A PodDisruptionBudget is blocking the eviction

A drain that would breach a PDB blocks rather than failing, which is why it can appear to hang.

Source: Disruptions (Kubernetes) — Pod disruption budgets

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