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Lab 4.2 - Service Discovery with DNS

Objectives​

By the end of this lab, you will be able to:

  • Use the internal DNS
  • Resolve Service names
  • Test inter-service communication

Exercise: Service Discovery​

Step 1: Create a Service​

kubectl apply -f service.yaml

Step 2: Test DNS Resolution​

# Create a test Pod
kubectl run dns-test --image=busybox --rm -it -- sh

# Inside the Pod, test the resolution
nslookup web-service
nslookup web-service.default.svc.cluster.local

Step 3: Communication​

# Inside the test Pod
wget -O- http://web-service

Cleanup​

kubectl delete service web-service

Lab created: December 2024