Section 3: Continuous Delivery (CD)

Lesson 1: Continuous Delivery vs. Continuous Deployment

Continuous Delivery (CD) and Continuous Deployment (CD) are related concepts but differ in the scope of automated release. Continuous Delivery involves automatically delivering code changes to a staging or pre-production environment for manual approval before production release. On the other hand, Continuous Deployment automatically deploys changes to production without manual intervention.

yaml

# Example Deployment Pipeline in Jenkinsfile

pipeline {

    agent any

    stages {

        stage('Build') {

            steps {

                // Build the project

                sh 'mvn clean install'

            }

        }

        stage('Test') {

            steps {

                // Run automated tests

                sh 'mvn test'

            }

        }

        stage('Deploy to Staging') {

            steps {

                // Deploy to staging environment

                sh 'deploy-to-staging.sh'

            }

        }

        stage('Manual Approval') {

            steps {

                // Wait for manual approval before proceeding to production

                input 'Approve deployment to production?'

            }

        }

        stage('Deploy to Production') {

            steps {

                // Deploy to production environment

                sh 'deploy-to-production.sh'

            }

        }

    }

}

This Jenkinsfile defines a deployment pipeline with stages for building, testing, deploying to staging, manual approval, and deploying to production.

Lesson 2: Artifact Management

Artifact management involves storing and managing binary artifacts produced during the build process. Tools like Nexus or Artifactory facilitate artifact management and ensure version consistency across environments.

Configuration Example (Maven - pom.xml):

xml

<!-- Maven Configuration for Nexus Repository -->

<distributionManagement>

    <repository>

        <id>nexus-releases</id>

        <url>https://your-nexus-repo.com/repository/releases/</url>

    </repository>

    <snapshotRepository>

        <id>nexus-snapshots</id>

        <url>https://your-nexus-repo.com/repository/snapshots/</url>

    </snapshotRepository>

</distributionManagement>

In this Maven configuration, the distributionManagement section specifies the repository URLs for release and snapshot artifacts.

This concludes Section 3 on Continuous Delivery (CD) Concepts and Artifact Management. The next section will cover Continuous Deployment and Infrastructure as Code.