Kubernetes - Scheduling
Given a Pod with a nodeSelector for label
zone: us-east, what will happen if no nodes have this label?Given a Pod with a nodeSelector for label zone: us-east, what will happen if no nodes have this label?
medium📝 Command Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand nodeSelector behavior
nodeSelector requires matching node labels; if none match, Pod cannot be scheduled.Step 2: Check Pod lifecycle
Without a matching node, the Pod stays Pending until a suitable node appears.Final Answer:
The Pod will remain in Pending state indefinitely -> Option BQuick Check:
nodeSelector mismatch = Pod Pending [OK]
Quick Trick: Pod waits Pending if no node matches nodeSelector [OK]
Common Mistakes:
- Assuming Pod schedules anywhere without matching label
- Thinking Pod auto-deletes on no match
- Believing scheduler ignores nodeSelector
Master "Scheduling" in Kubernetes
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