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CKA study material · question 666 of 1000

A node carries the taint tier=gold:NoSchedule. Which toleration matches it?

  1. key tier, operator Exists, effect NoSchedule
  2. key tier, operator Equal, value silver, effect NoSchedule
  3. key tier, operator Exists, value gold, effect NoSchedule
  4. key tier, operator Equal, value gold, effect NoExecute
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Answer: A. key tier, operator Exists, effect NoSchedule

A match needs the same key and effect and either Exists with no value, or Equal with an identical value. Exists must not name a value, and a mismatched value or effect does not match.

Source: Taints and Tolerations (Kubernetes) — Concepts

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