Creating a Service and Discovering DNS Names in Kubernetes

Create an nginx deployment, and verify it was successful

Use this command to create an nginx deployment:

kubectl run nginx --image=nginx

Use this command to verify deployment was successful:

kubectl get deployments

Create a service, and verify the service was successful

Use this command to create a service:

kubectl expose deployment nginx --port 80 --type NodePort

Use this command to verify the service was created:

kubectl get services

Create a pod that will allow you to query DNS, and verify it’s been created

Use the following YAML to create the busybox pod spec:

busybox.yaml

apiVersion: v1
kind: Pod
metadata:
  name: busybox
spec:
  containers:
  - image: busybox:1.28.4
    command:
      - sleep
      - "3600"
    name: busybox
  restartPolicy: Always

Use the following command to create the busybox pod:

kubectl create -f busybox.yaml

Use the following command to verify the pod was created successfully:

kubectl get pods

Perform a DNS query to the service

Use the following command to query the DNS name of the nginx service:

kubectl exec busybox -- nslookup nginx

Record the DNS name

Record the name: