CI/CD for Node.js Projects using Jenkins

1. Introduction

Continuous Integration (CI) and Continuous Deployment (CD) are essential practices in modern software development. This lesson focuses on implementing CI/CD for Node.js projects using Jenkins, a popular open-source automation server.

2. Key Concepts

3. Jenkins Setup

To set up Jenkins for Node.js projects, follow these steps:

1. Install Jenkins on your server or local machine.
2. Install required plugins:
   • NodeJS Plugin
   • Git Plugin
   • Pipelines Plugin
3. Configure Jenkins to recognize Node.js installations.

4. Pipeline Configuration

To create a Jenkins pipeline for a Node.js project:

1. Create a new pipeline job in Jenkins.
2. Use the following pipeline script in your Jenkinsfile:

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                script {
                    def npmHome = tool 'NodeJS'
                    env.PATH = "${npmHome}/bin:${env.PATH}"
                }
                sh 'npm install'
            }
        }
        stage('Test') {
            steps {
                sh 'npm test'
            }
        }
        stage('Deploy') {
            steps {
                sh 'npm run deploy'
            }
        }
    }
}
            

5. Testing & Deployment

After setting up the pipeline, Jenkins will automatically run the defined stages:

• Run tests after each build.
• Deploy to staging or production based on the branch.

6. Best Practices

• Write unit tests for your code.
• Use a staging environment for testing deployments.
• Monitor your CI/CD pipeline for failures.

7. FAQ