CI/CD Pipeline With Jenkins, GitHub & Docker

What Is CI/CD?

CI/CD stands for Continuous Integration and Continuous Deployment.

CI/CD automates application testing, building and deployment workflows.

• Faster Deployments
• Reduced Manual Work
• Better Code Quality
• Automated Delivery

Jenkins Installation & Setup

Jenkins is an open-source automation server used for building CI/CD pipelines.

Install Jenkins on Ubuntu server:

sudo apt update

sudo apt install openjdk-17-jdk -y

curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | sudo tee \
  /usr/share/keyrings/jenkins-keyring.asc > /dev/null

sudo apt install jenkins -y

Start Jenkins service:

sudo systemctl start jenkins

sudo systemctl enable jenkins

Open browser:

http://SERVER-IP:8080

GitHub Integration With Jenkins

GitHub repositories can automatically trigger Jenkins pipelines using webhooks.

GitHub Integration Steps

• Create GitHub Repository
• Push Application Code
• Connect Jenkins Credentials
• Add GitHub Webhook
• Configure Jenkins Job

http://YOUR-JENKINS/github-webhook/

Docker Workflow In CI/CD

Docker containers help create consistent deployment environments.

Jenkins pipelines often build Docker images automatically.

docker build -t myapp .

docker run -d -p 80:80 myapp

Docker Benefits

• Consistent Deployments
• Faster Delivery
• Easy Scaling
• Environment Isolation

Jenkins Pipeline Example

Jenkins pipelines automate the entire deployment workflow.

pipeline {

  agent any

  stages {

    stage('Clone') {

      steps {

        git 'https://github.com/user/project.git'

      }

    }

    stage('Build Docker Image') {

      steps {

        sh 'docker build -t myapp .'

      }

    }

    stage('Deploy') {

      steps {

        sh 'docker run -d -p 80:80 myapp'

      }

    }

  }

}

This pipeline automatically:

• Pulls Code
• Builds Docker Image
• Deploys Application

Production Deployment Strategy

Production deployments should be secure, automated and scalable.

Recommended CI/CD Workflow

A good CI/CD pipeline reduces deployment errors and improves release speed.

Best Practices

• Use Environment Variables
• Secure Credentials
• Enable Rollback Strategy
• Monitor Logs
• Automate Testing

Final CI/CD Pipeline Architecture

Modern DevOps infrastructure depends heavily on automation workflows.

Learning CI/CD pipelines is essential for DevOps Engineers in 2026.

Practice building pipelines regularly using GitHub, Jenkins and Docker projects.