CI/CD Demo Pipeline

This project demonstrates a complete CI/CD pipeline for a simple Node.js Express application using Jenkins and Docker.

Project Structure

ci-cd-demo/
├── app/
│   ├── server.js
│   ├── package.json
│   └── test/
│       └── test.js
├── Dockerfile
├── docker-compose.yml
├── Jenkinsfile
├── healthcheck.sh
└── README.md

Application

The demo app is a simple Express.js server that:

• Serves "Hello World" on the root path /
• Provides a health check endpoint /health returning {"status": "healthy"}

Local Development

1. Navigate to the app directory
2. Install dependencies: npm install
3. Run tests: npm test
4. Start the app: npm start

Docker Deployment

1. Build the Docker image: docker build -t ci-cd-demo .
2. Run with Docker Compose: docker-compose up -d
3. Access the app at http://localhost:3000
4. Check health: curl http://localhost:3000/health

Jenkins Pipeline

The Jenkinsfile defines a Declarative pipeline with the following stages:

• Build: Install npm dependencies
• Test: Run unit tests
• Package: Build Docker image
• Deploy: Deploy using Docker Compose
• Health-Check: Verify the application is healthy

To run the pipeline in Jenkins:

1. Create a new pipeline job
2. Point to this repository
3. The pipeline will execute automatically

Health Check Script

healthcheck.sh performs health checks by calling the /health endpoint and verifying the response. It retries up to 10 times with 5-second intervals.

Requirements

• Node.js
• Docker
• Docker Compose
• Jenkins (for pipeline execution)