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Creating a Service and Discovering DNS Names in Kubernetes

In this hands-on lab, you will be presented with a three-node cluster. You will be creating a simple nginx deployment, in which you must create a service from that deployment. In order to accomplish this, you will use the kubectl command line to create the deployment. Then, you will expose the deployment to create the service. When you have verified the service is up and running, you will create a busybox pod to test the DNS resolution to that service.

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Path Info

Level

Intermediate

Duration

30m

Last updated

Aug 18, 2025

Challenge

Create an nginx deployment, and verify it was successful.
1. Use this command to create an nginx deployment:
```
kubectl run nginx --image=nginx
```
2. Use this command to verify deployment was successful:
```
kubectl get deployments
```
Challenge

Create a service, and verify the service was successful.
1. Use this command to create a service:
```
kubectl expose deployment nginx --port 80 --type NodePort
```
2. Use this command to verify the service was created:
```
kubectl get services
```
Challenge

Create a pod that will allow you to query DNS, and verify it’s been created.
1. Use the following YAML to create the busybox pod spec:
```
apiVersion: v1
kind: Pod
metadata:
  name: busybox
spec:
  containers:
  - image: busybox:1.28.4
    command:
      - sleep
      - "3600"
    name: busybox
  restartPolicy: Always
```
2. Use the following command to create the busybox pod:
```
kubectl create -f busybox.yaml
```
3. Use the following command to verify the pod was created successfully:
```
kubectl get pods
```
Challenge

Perform a DNS query to the service.
1. Use the following command to query the DNS name of the nginx service:
```
kubectl exec busybox -- nslookup nginx
```

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Creating a Service and Discovering DNS Names in Kubernetes

Path Info

Table of Contents

Create an nginx deployment, and verify it was successful.

Create a service, and verify the service was successful.

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

Perform a DNS query to the service.

What's a lab?

Provided environment for hands-on practice

Guided walkthrough

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