Jenkinsfile concept - Mini Project: Build & Apply

Build a Simple Jenkins Pipeline with Jenkinsfile

📖 Scenario: You are a developer who wants to automate your software build process using Jenkins. You will create a Jenkinsfile that defines a simple pipeline with stages for building and testing your code.

🎯 Goal: Build a Jenkins pipeline using a Jenkinsfile that has two stages: Build and Test. Each stage will print a message to show it is running.

📋 What You'll Learn

Create a Jenkinsfile with a pipeline block

Add an agent to run the pipeline on any available node

Add a Build stage that prints 'Building the project...'

Add a Test stage that prints 'Running tests...'

Print a final message 'Pipeline completed!' after the stages

💡 Why This Matters

🌍 Real World

Jenkins pipelines automate software builds and tests, saving time and reducing errors in real projects.

💼 Career

Knowing how to write Jenkinsfiles is essential for DevOps roles to create reliable CI/CD pipelines.

1

Create the basic Jenkins pipeline structure

Create a Jenkinsfile with a pipeline block and add an agent any line inside it.

Jenkins

pipeline {
    agent any
    // Your code here
}

Need a hint?

The pipeline block is the main container. The agent any means Jenkins can run this pipeline on any available machine.

2

Add the Build stage

Inside the pipeline block, add a stages block. Inside stages, add a stage named Build that runs a steps block with a echo command printing 'Building the project...'.

Jenkins

pipeline {
    agent any
    stages {
        // Your code here
    }
}

Need a hint?

The stages block holds all the stages. Each stage has a name and steps to run commands.

3

Add the Test stage

Inside the existing stages block, add another stage named Test with a steps block that runs echo 'Running tests...'.

Jenkins

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                echo 'Building the project...'
            }
        }
        // Your code here
    }
}

Need a hint?

Add a new stage inside stages just like the Build stage.

4

Print a final completion message

Add a post block inside the pipeline block with a always section that runs a steps block. Inside steps, add echo 'Pipeline completed!' to print the final message.

Jenkins

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                echo 'Building the project...'
            }
        }
        stage('Test') {
            steps {
                echo 'Running tests...'
            }
        }
    }
    // Your code here
}

Need a hint?

The post block runs actions after all stages finish. The always section runs no matter what.