Expose a Guestbook App

Project 2: Expose a Guestbook App

What You'll Build

Deploy the classic Kubernetes guestbook app — a multi-tier web application with a PHP frontend and Redis backend. You'll wire up Services, DNS discovery, and Ingress routing.

What You'll Do

1. Deploy a Redis leader (single Pod) with a ClusterIP Service
2. Deploy Redis followers that replicate from the leader
3. Deploy the PHP frontend that connects to Redis via DNS (redis-leader.default.svc.cluster.local)
4. Expose the frontend with a NodePort Service, verify in browser
5. Install an Ingress controller (nginx-ingress)
6. Create an Ingress resource to route guestbook.local to the frontend
7. Test path-based routing: /api to a backend, / to frontend

Concepts Applied

• Multi-tier application deployment
• ClusterIP and NodePort Services
• DNS-based service discovery
• Ingress controller setup and Ingress resources
• Labels and selectors for Service routing

Content coming soon. This project builds a real multi-service application and exposes it to the outside world. You'll see how Services and DNS tie everything together.