Setting up a Docker Pipeline in Jenkins

To set up a Docker pipeline in Jenkins, follow these steps:

1. Install the Necessary Plugins

Start by installing the Pipeline Plugin and Docker Pipeline Plugin from the Jenkins Plugin Manager.

2. Create a New Pipeline Job

Go to your Jenkins dashboard, click on New Item, and select Pipeline. Give your job a name and click OK.

3. Define Your Pipeline in a Jenkinsfile

In your project repository, create a file named Jenkinsfile. This file will define your pipeline. Here’s a basic example:

pipeline {
    agent {
        docker {
            image 'maven:3-alpine'
            label 'my-docker-agent'
            args '-v /root/.m2:/root/.m2'
        }
    }
    stages {
        stage('Build') {
            steps {
                sh 'mvn clean install'
            }
        }
        stage('Test') {
            steps {
                sh 'mvn test'
            }
        }
        stage('Deploy') {
            steps {
                sh 'docker build -t myapp .'
                sh 'docker run -d -p 8080:8080 myapp'
            }
        }
    }
}

4. Configure Your Jenkins Job

In your Jenkins job configuration, scroll down to the Pipeline section. Choose Pipeline script from SCM if your Jenkinsfile is stored in your version control system (e.g., Git), and configure the necessary details such as repository URL and branch.

5. Run Your Pipeline

Click Save and then Build Now to run your pipeline. Jenkins will pull the Docker image, execute the build and test stages, and then build and run your Docker container.

6. Monitor the Pipeline

You can monitor the pipeline execution in real-time using the Blue Ocean plugin or the traditional Jenkins console output.

For more detailed configurations and advanced usage, refer to the official Jenkins Documentation on Docker pipelines.