[Solved] Given this Pod spec snippet, what will happen if no nodes have label disk=ssd? spec: affinity: nodeAffinity:... Given this Pod spec snippet, what will happen if no nodes have label disk=ssd? | Kubernetes

Kubernetes - Scheduling

Given this Pod spec snippet, what will happen if no nodes have label disk=ssd?

spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: disk
            operator: In
            values:
            - ssd

APod will be scheduled on any node ignoring the label

BPod will remain Pending until a node with <code>disk=ssd</code> is available

CPod will be scheduled on nodes without the label but with enough resources

DPod will be deleted automatically by the scheduler

Step-by-Step Solution

Solution:

Step 1: Understand requiredDuringScheduling nodeAffinity
This rule means the Pod must be scheduled only on nodes matching the label disk=ssd.
Step 2: Check behavior if no matching nodes exist
If no nodes have disk=ssd, the Pod cannot be scheduled and stays in Pending state.
Final Answer:
Pod will remain Pending until a node with disk=ssd is available -> Option B
Quick Check:
Required nodeAffinity = Pod waits for matching node [OK]

Quick Trick: Required nodeAffinity blocks scheduling if no matching node [OK]

Common Mistakes:

Thinking Pod schedules ignoring required nodeAffinity
Assuming Pod gets deleted if unschedulable
Confusing required and preferred nodeAffinity

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More Kubernetes Quizzes

Given this Pod spec snippet, what will happen if no nodes have label disk=ssd?

Step 1: Understand requiredDuringScheduling nodeAffinity

Step 2: Check behavior if no matching nodes exist

Final Answer:

Quick Check:

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