DevOps CI/CD Pipeline Project

This project demonstrates a simple CI/CD pipeline using GitLab CI/CD for a Node.js web application. The pipeline includes testing, building a Docker image, and deploying to a Kubernetes cluster.

Project Structure

• app.js: A simple Express.js web application
• test/app.test.js: Unit tests for the application
• Dockerfile: Instructions for building the application container
• .gitlab-ci.yml: GitLab CI/CD pipeline configuration
• kubernetes/deployment.yml: Kubernetes deployment configuration

CI/CD Pipeline

The pipeline consists of three stages:

1. Test: Runs unit tests for the application
2. Build: Builds a Docker image and pushes it to the GitLab Container Registry
3. Deploy: Deploys the application to a Kubernetes cluster (staging environment)

Prerequisites

• GitLab account and project
• Kubernetes cluster (e.g., Google Kubernetes Engine, Amazon EKS, or Minikube for local development)
• GitLab Runner with Docker executor

Setup

1. Push this project to your GitLab repository
2. Set up the following CI/CD variables in your GitLab project settings:
   • KUBE_URL: Your Kubernetes cluster API URL
   • KUBE_TOKEN: A service account token with permissions to deploy to your cluster
3. Ensure your GitLab Runner is configured and running
4. Trigger the pipeline by pushing a commit to the main branch

Local Development

To run the application locally:

1. Install dependencies: npm install
2. Start the application: node app.js
3. Run tests: npm test

License

This project is open-source and available under the MIT License.