DevOps(Day-27) : Jenkins Declarative Pipeline with Docker

TABLE OF CONTENTS

• Task-1 : Using 'sh' syntax

• Task-2 : Using 'docker' groovy syntax

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:-

COPY

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

Task-1 : Using 'sh' syntax

1. Navigate to Jenkins and click on new item.

   

2. Create a pipeline project.

   

3. Configure the pipeline by writing the groovy script for the node app.

   COPY

     pipeline {
         agent any
   
         stages {
             stage('Code Fetch') {
                 steps {
                     git 'https://github.com/Biswaraj/nodejs.git/'
                 }
             }
             stage('Build'){
                 steps {
                     sh 'sudo docker build . -t Biswaraj/nodejs-app:latest'
                 }
             }
             stage('Run'){
                 steps {
                     sh 'sudo docker run -d -p 8000:8000 biswaraj/nodejs-app:latest'
                 }
             }
         }
     }
   

   

4. Save and click on Build now.

   

5. Check the output of the build.

   

6. Now, you can use the URL to check if the application is live.

Task-2 : Using 'docker' groovy syntax

1. Follow all the same steps to create a project as above.

2. In the configuration write the groovy script to integrate docker with Jenkins.

   

   COPY

     pipeline {
         agent any
         stages {
             stage('Build') {
                 agent {
                     docker { 
                         image 'biswaraj/nodejs-app:latest'
                         reuseNode true
                     }
                 }
                 stage{
                     echo "built"
                     sh 'nodejs --version'
                 }
   
                 }
              stage('Run') {
                 steps {
                     sh 'sudo docker run -d --name nodejsapp biswaraj/nodejs-app:latest'
                 }
             }
             }
         }
   

Thanks for reading my article. Have a nice day.

WRITTEN BY Biswaraj Sahoo --AWS Community Builder | DevOps Engineer | Docker | Linux | Jenkins | AWS | Git | Terraform | Docker | kubernetes

Empowering communities via open source and education. Connect with me over linktree: linktr.ee/biswaraj333