[Solved] Which of the following is the correct syntax to specify a required node affinity in a pod spec? — Ans: "nodeAffinity": {"requiredDuringSchedulingIgnoredDuringExecution":... | Kubernetes

Kubernetes - Scheduling

Which of the following is the correct syntax to specify a required node affinity in a pod spec?

A"nodeAffinity": {"preferredDuringSchedulingIgnoredDuringExecution": [{"weight": 1, "preference": {"matchExpressions": [{"key": "disktype", "operator": "In", "values": ["ssd"]}]}}]}

B"podAffinity": {"requiredDuringSchedulingIgnoredDuringExecution": {"labelSelector": {"matchLabels": {"disktype": "ssd"}}}}

C"nodeSelector": {"disktype": "ssd"}

D"nodeAffinity": {"requiredDuringSchedulingIgnoredDuringExecution": {"nodeSelectorTerms": [{"matchExpressions": [{"key": "disktype", "operator": "In", "values": ["ssd"]}]}]}}

Step-by-Step Solution

Solution:

Step 1: Identify required node affinity syntax
Required node affinity uses the key requiredDuringSchedulingIgnoredDuringExecution with nodeSelectorTerms and matchExpressions to specify node labels.
Step 2: Check options for correct structure
"nodeAffinity": {"requiredDuringSchedulingIgnoredDuringExecution": {"nodeSelectorTerms": [{"matchExpressions": [{"key": "disktype", "operator": "In", "values": ["ssd"]}]}]}} matches the required node affinity syntax. "nodeAffinity": {"preferredDuringSchedulingIgnoredDuringExecution": [{"weight": 1, "preference": {"matchExpressions": [{"key": "disktype", "operator": "In", "values": ["ssd"]}]}}]} is preferred affinity, C is nodeSelector (different syntax), and D is pod affinity, not node affinity.
Final Answer:
"nodeAffinity": {"requiredDuringSchedulingIgnoredDuringExecution": {"nodeSelectorTerms": [{"matchExpressions": [{"key": "disktype", "operator": "In", "values": ["ssd"]}]}]}} -> Option D
Quick Check:
Required node affinity uses requiredDuringSchedulingIgnoredDuringExecution [OK]

Quick Trick: Required node affinity uses requiredDuringSchedulingIgnoredDuringExecution [OK]

Common Mistakes:

Confusing preferred and required affinity syntax
Using podAffinity instead of nodeAffinity
Mixing nodeSelector with nodeAffinity syntax

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More Kubernetes Quizzes

Which of the following is the correct syntax to specify a required node affinity in a pod spec?

Step 1: Identify required node affinity syntax

Step 2: Check options for correct structure

Final Answer:

Quick Check:

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