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CKA study material · question 694 of 1000

A service owner writes a PodDisruptionBudget with minAvailable: 2 and expects it to survive a node's power supply failing. What does the budget actually guarantee?

  1. Nothing for that case; a PDB constrains voluntary disruptions only
  2. Two replicas will always be running, whatever the cause
  3. The failed node's Pods will be rescheduled within the budget
  4. The cluster will refuse to schedule work onto unreliable nodes
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Answer: A. Nothing for that case; a PDB constrains voluntary disruptions only

A PodDisruptionBudget bounds voluntary disruptions such as drains and evictions. Hardware failure is involuntary and outside what it can promise.

Source: Disruptions (Kubernetes) — Voluntary and involuntary disruptions

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