Create Jenkins file with Docker for Node.js app

Question

I have a Node.js application with a Docker file. I want to build this in Jenkins. I also want to run test cases.For which I have defined a script in package.json file. Which runs test cases and generates coverage report.

From what I have understood. I need to

Run Jenkins in Docker
Checkout branch
Create a Docker in Jenkins
Build my application
Run test cases and generate coverage reports
Deploy

I want to checkout my repository from github.com . Here are the steps that I followed

Click on new item on Jenkins main page
Entered name and chose pipeline form list
Under Pipeline I chose definition as Pipeline script from SCM
Chose SCM as GIT
Under Repository entered the Repository Url with the credentials
Under Branches to build entered by branch as */my_branch_here
Added the script path for Jenkins file

Here is what my Jenkins file looks like

pipeline {
agent {
    docker {
        image 'node:6-alpine' 
        args '-p 3000:3000' 
    }
}
stages {
    stage('initialization') {
        steps {
            script {
                TAG_NAME = '1.1.'+ "${env.BUILD_NUMBER}"
                def clientImage = docker.build("registrypath:5000/test:${TAG_NAME}", "-f ./path_to_dockerfile/Dockerfile .")
            }
        }
    }
}

}

I get a Docker error: command not found. I have not been able to complete the first step to proceed further.

I-Doit I-Doit · Accepted Answer · 2019-02-06T17:14:39

You can use docker-in-docker in order to build your images in a docker container.

That is not quite recommendable due to data corruption.

Recommended: install in your own image, derived from jenkins/jenkins:lts, the binary file for docker and mount /var/lib/docker from your machine, where Jenkins is run.

Through this, you have also the advantage that your image are cached on your machine and you must not pull always the image from repository because Jenkins was restarted.

For more informations:

Create Jenkins file with Docker for Node.js app

3 Answers