[Solved] You created this ExternalName service YAML:apiVersion: v1 kind: Service metadata: name: ext-svc spec: type: ExternalName externalName: 123.45.67.89Why does this configuration fail? | Kubernetes

Kubernetes - Services

You created this ExternalName service YAML:

apiVersion: v1
kind: Service
metadata:
  name: ext-svc
spec:
  type: ExternalName
  externalName: 123.45.67.89

Why does this configuration fail?

AexternalName field is missing

Btype ExternalName cannot be used with metadata

CexternalName must be a DNS name, not an IP address

DService type must be ClusterIP for IP addresses

Step-by-Step Solution

Solution:

Step 1: Check externalName field requirements
The externalName must be a valid DNS name, not an IP address.
Step 2: Identify error cause
Using an IP address like 123.45.67.89 in externalName is invalid and causes failure.
Final Answer:
externalName must be a DNS name, not an IP address -> Option C
Quick Check:
externalName = DNS name only [OK]

Quick Trick: externalName must be a DNS name, not IP [OK]

Common Mistakes:

Master "Services" in Kubernetes

9 interactive learning modes - each teaches the same concept differently

More Kubernetes Quizzes

You created this ExternalName service YAML: