A StatefulSet named db uses volumeClaimTemplates for storage. What happens to the PVCs when the StatefulSet is scaled down from 5 to 3 replicas?

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Kubernetes - Persistent Storage

A StatefulSet named db uses volumeClaimTemplates for storage. What happens to the PVCs when the StatefulSet is scaled down from 5 to 3 replicas?

APVCs for db-3 and db-4 are deleted automatically

BPVCs for pods db-3 and db-4 remain but pods are deleted

CAll PVCs are deleted when scaling down

DPVCs are renamed to match new pod names

Step-by-Step Solution

Solution:

Step 1: Understand PVC lifecycle with StatefulSet
PVCs created by volumeClaimTemplates are retained even if pods are deleted.
Step 2: Apply to scaling down scenario
When scaling down, pods db-3 and db-4 are deleted but their PVCs remain for data safety.
Final Answer:
PVCs for pods db-3 and db-4 remain but pods are deleted -> Option B
Quick Check:
PVCs persist after pod deletion [OK]

Quick Trick: PVCs stay after pod deletion in StatefulSet [OK]

Common Mistakes:

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