Creating Your First Jenkins CI/CD Pipeline: Step-by-Step Guide

 

Creating Your First Jenkins CI/CD Pipeline: Step-by-Step Guide

Now that you have Jenkins installed and configured, it's time to set up your first CI/CD pipeline. Jenkins Pipelines automate code building, testing, and deployment, making software delivery faster and error-free.

In this guide, we will cover:
✅ What is a Jenkins Pipeline?
✅ Types of Jenkins Pipelines
✅ Creating a Simple Jenkins Pipeline (Step-by-Step)
✅ Building and Deploying an Application using Jenkins

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🌟 What is a Jenkins Pipeline?

A Jenkins Pipeline is a series of automated steps that define how your code is built, tested, and deployed. It follows the CI/CD (Continuous Integration & Continuous Deployment) process to ensure fast and reliable software releases.

💡 Example:

• Code is pushed to GitHub
• Jenkins pulls the latest code
• Build & compile the code
• Run automated tests
• Deploy the application

This entire process is automated with Jenkins Pipelines.

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🛠 Types of Jenkins Pipelines

There are two main types of Jenkins pipelines:

1️⃣ Declarative Pipeline (Recommended)

• Uses a structured, easy-to-read syntax
• Defined inside a Jenkinsfile
• More maintainable and scalable

2️⃣ Scripted Pipeline

• Uses Groovy scripting
• More flexible but complex
• Recommended for advanced users

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🚀 Creating a Simple Jenkins Pipeline (Step-by-Step)

Step 1: Create a New Pipeline Project

1️⃣ Open Jenkins and click on New Item
2️⃣ Enter a name for your project (e.g., MyFirstPipeline)
3️⃣ Select Pipeline and click OK

Step 2: Define the Pipeline in Jenkinsfile

🔹 Go to Pipeline Definition and select Pipeline Script
🔹 Copy & paste the following code:

pipeline {
    agent any 
    stages {
        stage('Clone Repository') {
            steps {
                git 'https://github.com/your-repository-url.git'
            }
        }
        stage('Build') {
            steps {
                echo 'Building the project...'
            }
        }
        stage('Test') {
            steps {
                echo 'Running tests...'
            }
        }
        stage('Deploy') {
            steps {
                echo 'Deploying the application...'
            }
        }
    }
}

📌 Explanation:
✅ agent any – Runs the pipeline on any available Jenkins node
✅ stage('Clone Repository') – Clones the GitHub repository
✅ stage('Build') – Simulates a build step
✅ stage('Test') – Simulates a test step
✅ stage('Deploy') – Simulates a deployment step

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🔄 Running the Pipeline

1️⃣ Click Save & Apply
2️⃣ Click Build Now
3️⃣ Check the console output to see pipeline execution

💡 Jenkins will now automatically pull the latest code, build, test, and deploy it!

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🎯 Next Topic: Integrating Jenkins with Docker, Kubernetes, and AWS for Advanced CI/CD

Stay tuned as we explore how to deploy applications using Jenkins with Docker, Kubernetes, and AWS!