Post section (success, failure, always) in Jenkins - Mini Project: Build & Apply

Using the Post Section in Jenkins Pipelines

📖 Scenario: You are setting up a Jenkins pipeline to build a simple project. You want to run specific actions after the build finishes, depending on whether it succeeded, failed, or always after the build.

🎯 Goal: Build a Jenkins pipeline script that uses the post section with success, failure, and always blocks to print messages based on the build result.

📋 What You'll Learn

Create a Jenkins pipeline with a pipeline block

Add a stage named Build that runs a simple shell command

Add a post section with success, failure, and always blocks

Print Build succeeded! on success

Print Build failed! on failure

Print This always runs. regardless of build result

💡 Why This Matters

🌍 Real World

In real projects, Jenkins pipelines automate building, testing, and deploying software. The post section helps run cleanup, notifications, or reports after builds.

💼 Career

Understanding Jenkins post sections is essential for DevOps roles to ensure proper build lifecycle management and notifications.

1

Create the basic Jenkins pipeline structure

Write a Jenkins pipeline script starting with pipeline { and add an agent any line inside it.

Jenkins

pipeline {
    agent any
    // Your code here
}

Need a hint?

Start your Jenkinsfile with pipeline { and specify agent any to run on any available agent.

2

Add a Build stage with a shell command

Inside the pipeline block, add a stages section with one stage named Build. Inside this stage, add a steps block that runs the shell command echo Building... using sh.

Jenkins

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                // Your code here
            }
        }
    }
}

Need a hint?

Use stages to group your build steps. Inside the Build stage, use sh 'echo Building...' to run the shell command.

3

Add the post section with success, failure, and always blocks

Add a post section inside the pipeline block but outside stages. Inside post, add success, failure, and always blocks. In each block, add a steps section that runs echo commands printing exactly these messages: Build succeeded! for success, Build failed! for failure, and This always runs. for always.

Jenkins

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

Need a hint?

The post section goes after stages. Use success, failure, and always blocks with steps inside to print messages.

4

Print the final pipeline script

Print the entire Jenkins pipeline script you wrote so far.

Jenkins

pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                sh 'echo Building...'
            }
        }
    }
    post {
        success {
            steps {
                echo 'Build succeeded!'
            }
        }
        failure {
            steps {
                echo 'Build failed!'
            }
        }
        always {
            steps {
                echo 'This always runs.'
            }
        }
    }
}

# Your code here

Need a hint?

Use print to show the message pipeline script complete confirming your script is ready.