What is the output of kubectl get svc ext-svc -o yaml for an ExternalName service named ext-svc with externalName db.example.com?

medium📝 Command Output Q5 of 15

Kubernetes - Services

What is the output of kubectl get svc ext-svc -o yaml for an ExternalName service named ext-svc with externalName db.example.com?

Aspec: type: ExternalName externalName: db.example.com clusterIP: ""

Bspec: type: ExternalName externalName: db.example.com

Cspec: type: ExternalName externalName: db.example.com clusterIP: None

Dspec: type: ClusterIP externalName: db.example.com

Step-by-Step Solution

Solution:

Step 1: Recall ExternalName service spec output
ExternalName services show type: ExternalName and externalName field; clusterIP is not set or shown.
Step 2: Evaluate options
The snippet showing only type: ExternalName and externalName: db.example.com correctly matches the spec. Snippets including clusterIP incorrectly add it to spec. The snippet with type: ClusterIP has the wrong type.
Final Answer:
spec with type ExternalName and externalName only -> Option B
Quick Check:
kubectl get svc shows type and externalName only [OK]

Quick Trick: ExternalName services do not have clusterIP set [OK]

Common Mistakes:

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