Introduction to Continuous Integration with Jenkins

Introduction to Jenkins

Jenkins is a popular automation server that enables developers to build, test, and deploy their applications continuously. In this tutorial, we will learn how to set up a Jenkins server and create a Continuous Integration pipeline.

Step 1: Install Jenkins

To get started with Jenkins, you need to install it on your machine. You can download the Jenkins installer from the official Jenkins website.

# Install Jenkins on Ubuntu-based systems
sudo apt update
sudo apt install default-jdk -y
wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -
sudo sh -c 'echo deb https://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
sudo apt update
sudo apt install jenkins -y

Step 2: Configure Jenkins

Once Jenkins is installed, you need to configure it. Open a web browser and navigate to http://localhost:8080. You will be prompted to unlock Jenkins using the initial admin password.

# Get the initial admin password
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Step 3: Create a Jenkins Job

Now that Jenkins is configured, we can create a new job. Click on the New Item button and select Freestyle project.

// Jenkinsfile
pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                sh 'make build'
            }
        }
        stage('Test') {
            steps {
                sh 'make test'
            }
        }
        stage('Deploy') {
            steps {
                sh 'make deploy'
            }
        }
    }
}

In this tutorial, we learned how to install Jenkins, configure it, and create a Continuous Integration pipeline. With this knowledge, you can automate your build, test, and deployment process and improve the quality of your applications.