Spring Boot Guestbook Application

This is a Spring Boot version of the Kubernetes Guestbook application.

Requirements

• Java 17
• Maven 3.6+
• Redis (for production use)

Running Locally

Without Docker

1. Clone this repository
2. Run the application:

   mvn spring-boot:run
   

3. Access the application at http://localhost:3000

With Docker

1. Build the Docker image:

   docker build -t guestbook:v1 .
   

2. Run the container:

   docker run -p 3000:3000 guestbook:v1
   

3. Access the application at http://localhost:3000

Deploying to Kubernetes

1. Update the deployment.yml file with your namespace:

   image: us.icr.io/${YOUR_NAMESPACE}/guestbook:v1
   

2. Apply the deployment:

   kubectl apply -f deployment.yml
   

Application Structure

• GuestbookApplication.java - Main Spring Boot application
• GuestbookController.java - REST endpoints for the guestbook functionality
• RedisConfig.java - Redis configuration for data storage
• Static files in src/main/resources/static:
  • index.html - Main UI
  • script.js - Client-side JavaScript
  • style.css - Styling

Features

• View guestbook entries
• Add new entries to the guestbook
• Store entries in Redis
• View environment variables
• Check Redis connection status

Redis Configuration

Redis connection details can be configured in application.properties or via environment variables:

• REDIS_MASTER_SERVICE_HOST - Redis host
• REDIS_MASTER_SERVICE_PORT - Redis port
• REDIS_MASTER_SERVICE_PASSWORD - Redis password (if required)