Company: Okta | Difficulty: Medium
You are deploying a distributed database named dns-app in the dev namespace. This application requires that each Pod be addressable by a predictable, unchanging hostname (e.g., dns-app-0.dns-app) so the nodes can find each other for data replication.
Create a Headless Service named dns-app in the dev namespace. Create a StatefulSet named dns-app with 3 replicas image nginx:alpine. Ensure the StatefulSet uses the dns-app service for network identity. Verify that pods have stable DNS names like dns-app-0.dns-app
Use kubectl exec -it netshoot -n dev -- nslookup dns-app-0.dns-app to validate resolution.