CI/CD using Jenkins and Docker Java project

In this blog, we will explore the CI/CD process using Jenkins and Docker. We will deploy the sample java application using a Docker container. We will be deploying the war file in a tomcat container. At last, this process will help us achieve continuous integration and continuous deployment for your application inside a container

Prerequisite:

Two AWS EC2 instance ( one is Jenkins Server and another is jenkins agent)
setup of jenkins master and slave (Jenkins setup)
Installation of docker and its access to Jenkins

Agenda:
1. setup of build tool maven in jenkins
2. Create a pipeline job in Jenkins and trigger the build

Step :-1

Setting maven as global tool in jenkins

create a new job java-cicd under pipeline and configure

place the jenkins pipleline

 pipeline {
     agent {label 'dev'}

    tools
     {
        maven "Maven"
     }
  stages {
       stage('checkout') {
            steps {

                 git branch: 'master', url: 'https://github.com/Niljay892/CI-CD-using-Docker.git'

           }
         }
         stage('Execute Maven') {
            steps {

                 sh 'mvn package'             
           }
         }
         stage('Docker Build and Tag') {
            steps {

                 sh 'docker build -t samplewebapp:latest .' 
                 sh 'docker tag samplewebapp nileshops/samplewebapp:latest'
                 //sh 'docker tag samplewebapp nileshops/samplewebapp:$BUILD_NUMBER'

           }
         }

   stage('Publish image to Docker Hub') {

             steps {
                     withCredentials([usernamePassword(credentialsId:"dockerHub" ,passwordVariable:"dockerHubPassword" ,usernameVariable:"dockerHubUser")]){
                     sh "docker login -u ${env.dockerHubUser} -p ${env.dockerHubPassword}"
                     sh  'docker push nileshops/samplewebapp:latest'
                     //  sh  'docker push nileshops/samplewebapp:$BUILD_NUMBER' 
         }

           }
         }

       stage('Run Docker container on Jenkins Agent') {

             steps 
    {
                 sh "docker run -d -p 8003:8080 nileshops/samplewebapp"

             }
         }
  }
 }

save the pipeline (make changes as per ur docker hub or u and leave the docker push stage)

now trigger the pipeline

Now, you can browse your application by using the url (in aws open port before accessing url) http://yourip:8080/LoginWebApp-1/ and you will see the login page as shown below:

Congratulations, you have successfully set up the CI/CD process using Jenkins and Docker. You can also integrate your job with Sonarqube to check the code quality and code coverage. You have successfully deployed your first Tomcat application inside a Docker container

CI/CD using Jenkins and Docker Java project

Prerequisite:

Agenda: