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

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 bandank/app:latest'
            }
        }
    }

Task-1 : Using 'sh' syntax

Navigate to Jenkins and click on new item.
Create a pipeline project.

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

 pipeline {
     agent any

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

Save and click on Build now.
Check the output of the build.
Now, you can use the URL to check if the application is live.

Task-2 : Using 'docker' groovy syntax

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

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

 pipeline {
     agent any
     stages {
         stage('Build') {
             agent {
                 docker { 
                     image 'bandank/nodejs-app:latest'
                     reuseNode true
                 }
             }
             stage{
                 echo "built"
                 sh 'nodejs --version'
             }

             }
          stage('Run') {
             steps {
                 sh 'sudo docker run -d --name nodejsapp bandank/nodejs-app:latest'
             }
         }
         }
     }