Day27 ----> 90DaysOfDevOps Challenge @TWS

Day 27 Task: Jenkins Declarative Pipeline with Docker

Day 26 was all about a Declarative pipeline, now its time to level up things, let's integrate Docker and your Jenkins declarative pipeline

Use your Docker Build and Run Knowledge

docker build - you can use sh 'docker build . -t <tag>' in your pipeline stage block to run the docker build command. (Make sure you have docker installed with correct permissions.

docker run: you can use sh 'docker run -d <image>' in your pipeline stage block to build the container.

How will the stages look?

stages {
        stage('Build') {
            steps {
                sh 'docker build -t trainwithshubham/django-app:latest'
            }
        }
    }

Task-01

Create a docker-integrated Jenkins declarative pipeline

Use the above-given syntax using sh inside the stage block

pipeline {
    agent any
    environment {
        DOCKER_IMAGE_TAG = "${BUILD_NUMBER}"
    }
    stages {
        stage ("code"){
            steps {
                git url: 'https://github.com/Chaitannyaa/django-todo-cicd.git', branch: 'develop'
            }
        }
        stage ("Build"){
            steps {
                sh 'docker build -t chaitannyaa/django-todo-app:v-${DOCKER_IMAGE_TAG} .'
            }
        }
        stage ("login and push image"){
            steps {
                echo 'Logging into docker and pushing an image on dockerhub'
                withCredentials([usernamePassword(credentialsId: 'DockerHub', passwordVariable: 'password', usernameVariable: 'user')]) {
                    sh "docker login -u ${env.user} -p ${env.password}"
                    sh "docker push chaitannyaa/django-todo-app:v-${DOCKER_IMAGE_TAG}"
                }
            }
        }
        stage ("Deploy"){
            steps {
                sh 'docker-compose down && docker-compose up -d'
            }
        }
    }
}

You will face errors in case of running a job twice, as the docker container will be already created, so for that do task 2

Task-02

Create a docker-integrated Jenkins declarative pipeline using the docker groovy syntax inside the stage block.

pipeline {
    agent any
    environment {
        DOCKER_IMAGE_TAG = "${BUILD_NUMBER}"
    }
    stages {
        stage("code"){
            steps {
                git url: 'https://github.com/Chaitannyaa/django-todo-cicd.git', branch: 'develop'
            }
        }
        stage("Build and push image"){
            steps {
                script {
                    def dockerImage = docker.build("chaitannyaa/django-todo-app:v-${DOCKER_IMAGE_TAG}", "--build-arg BUILD_NUMBER=${DOCKER_IMAGE_TAG} .")
                    withCredentials([usernamePassword(credentialsId: 'DockerHub', passwordVariable: 'password', usernameVariable: 'user')]) {
                        docker.withRegistry("https://registry.hub.docker.com", "DockerHub") {
                            dockerImage.push()
                        }
                    }
                }
            }
        }
        stage("Deploy"){
            steps {
                sh '''
                    if [[ -f /home/ubuntu/db.sqlite3 ]]; then
                        echo "Perfect"
                        echo '1180' | sudo -S rm -f /var/lib/jenkins/workspace/Django-app-CICD-Pipeline/db.sqlite3
                        echo '1180' | sudo -S cp -r /home/ubuntu/db.sqlite3 /var/lib/jenkins/workspace/Django-app-CICD-Pipeline/ 
                    else
                        echo '1180' | sudo -S cp -r /var/lib/jenkins/workspace/Django-app-CICD-Pipeline/db.sqlite3 /home/ubuntu/db.sqlite3
                    fi
                    docker-compose down && docker-compose up -d
                '''
            }
        }
    }
}