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Why does a StatefulSet guarantee stable storage and network identity even after pod rescheduling?

hard📝 Conceptual Q10 of 15
Kubernetes - Persistent Storage
Why does a StatefulSet guarantee stable storage and network identity even after pod rescheduling?
ABecause it disables pod restarts
BBecause it schedules pods on the same node always
CBecause it uses persistent volume claims and stable pod names with ordinal indices
DBecause it uses ephemeral storage and random pod names
Step-by-Step Solution
Solution:

  1. Step 1: Understand StatefulSet guarantees

    StatefulSets assign stable pod names with ordinal indices and use persistent volume claims for storage.

  2. Step 2: Explain why this ensures stability

    Stable names and persistent storage keep identity and data intact even if pods move nodes.

  3. Final Answer:

    Because it uses persistent volume claims and stable pod names with ordinal indices -> Option C

  4. Quick Check:

    Stable identity = PVCs + stable pod names [OK]
Quick Trick: Stable storage and names keep pod identity after rescheduling [OK]
Common Mistakes:
  • Thinking pods never move nodes
  • Believing pod restarts are disabled
  • Confusing ephemeral storage with persistent

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