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CKA study material · question 607 of 1000

A Secret contains a key named app.config.value, and a Pod maps every key into environment variables. What happens?

  1. The Pod fails to start because the key is invalid
  2. The key is renamed with underscores and injected
  3. The key is skipped and the Pod still starts
  4. The whole envFrom block is ignored
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Answer: C. The key is skipped and the Pod still starts

Keys that do not meet the rules for environment variable names are simply not made available to the container, and the Pod is allowed to start regardless — a quiet failure worth checking for.

Source: Secrets (Kubernetes) — Using Secrets as environment variables

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