- \n
- Ubuntu 18.04<\/li>\n
- Root privileges<\/li>\n<\/ul>\n
What we will do<\/h2>\n
- \n
- Install Docker CE<\/li>\n
- Install Docker-Compose<\/li>\n
- Setup Nodejs Express Project<\/li>\n
- Build the Project<\/li>\n
- Testing<\/li>\n<\/ol>\n
Step 1 – Install Docker CE<\/h2>\n
In this tutorial, we will install docker-ce community edition from the docker repository. We will install docker-ce community edition and docker-compose that supports compose file version 3.<\/p>\n
Before installing docker-ce, install docker dependencies needed using the apt command.<\/p>\n
sudo apt install -y \\
\u00a0\u00a0\u00a0 apt-transport-https \\
\u00a0\u00a0\u00a0 ca-certificates \\
\u00a0\u00a0\u00a0 curl \\
\u00a0\u00a0\u00a0 software-properties-common<\/p>\nNow add the docker key and repository by running commands below.<\/p>\n
curl -fsSL https:\/\/download.docker.com\/linux\/ubuntu\/gpg | sudo apt-key add –
sudo add-apt-repository \\
\u00a0\u00a0 “deb [arch=amd64] https:\/\/download.docker.com\/linux\/ubuntu \\
\u00a0\u00a0 $(lsb_release -cs) \\
\u00a0\u00a0 stable”<\/p>\n![\"Install](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04.png\" "\\"\\"")
<\/a><\/p>\nInstall the docker-ce package.<\/p>\n
sudo apt install docker-ce<\/p>\n
After the installation is complete, start the docker service and enable it to launch every time at system boot.<\/p>\n
systemctl start docker
systemctl enable docker<\/p>\n![\"Start](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-1.png\" "\\"\\"")
<\/a><\/p>\nNext, we will give the normal user privileges to run and manage docker container.<\/p>\n
Add a new user named ‘mohammad’ and add it to the docker group.<\/p>\n
useradd -m -s \/bin\/bash mohammad
usermod -a -G docker mohammad<\/p>\nNow login as the ‘mohammad’ user and run docker container hello-world.<\/p>\n
su – mohammad
docker run hello-world<\/p>\nAnd you will get the result as shown below.<\/p>\n
![\"Add](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-2.png\" "\\"\\"")
<\/a><\/p>\nStep 2 – Install Docker-Compose<\/h2>\n
In this step, we will install docker-compose manually from the binary file that can be downloaded from GitHub. We will install the latest docker-compose version that will support the compose v3.<\/p>\n
Download the latest 1.22.0 version of docker-compose using curl command to the ‘\/usr\/local\/bin’ directory, and then make it executable using chmod.<\/p>\n
Run commands below.<\/p>\n
sudo curl -L https:\/\/github.com\/docker\/compose\/releases\/download\/1.22.0\/docker-compose-$(uname -s)-$(uname -m) -o \/usr\/local\/bin\/docker-compose
sudo chmod +x \/usr\/local\/bin\/docker-compose<\/p>\nAnd the latest docker-compose version has been installed, check by running the docker-compose command below.<\/p>\n
docker-compose version<\/p>\n
Following is the result.<\/p>\n
![\"Install](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-3.png\" "\\"\\"")
<\/a><\/p>\nStep 3 – Setup Nodejs Express Project<\/h2>\n
In this section, we will configure the Nodejs application environment. We will be using simple nodejs application that can be generated using the ‘express-generator’.<\/p>\n
Login to the ‘mohammad’ user.<\/p>\n
su – mohammad<\/p>\n
Create a new directory named ‘project’ and go to it.<\/p>\n
mkdir -p project
cd project<\/p>\nNow generate a simple hello-word nodejs application using the ‘express’ command below.<\/p>\n
express hakase-app<\/p>\n
Note:<\/strong><\/p>\n
Make sure nodejs, npm, and the ‘express-generator’ packages have been installed on the system.<\/p>\n
And you will get the simple nodejs express app on the ‘hakase-app’ directory.<\/p>\n
![\"Install](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-4.png\" "\\"\\"")
<\/a><\/p>\nNext, we will build our custom docker image for the ‘hakase-app’ nodejs application.<\/p>\n
Under the ‘project’ directory, create a new ‘Dockerfile’ using vim<\/a>.<\/p>\n
vim Dockerfile<\/p>\n
Paste the following docker image configuration there.<\/p>\n
FROM node:8.11.4-alpine \n \nRUN mkdir -p \/src \nRUN npm install express-generator -g \n \nWORKDIR \/src \nADD hakase-app\/package.json \/src\/package.json \nRUN npm install \n \nEXPOSE 3000 \nCMD node hakase-app\/bin\/www<\/pre>\n
Save and exit.<\/p>\n
![\"Use](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-5.png\" "\\"\\"")
<\/a><\/p>\nWe’re creating a new custom docker image for our nodejs application with specifications below.<\/p>\n
- \n
- The custom image is based on the official nodejs image 8.11.4 alpine version.<\/li>\n
- We’re creating a new directory for our project ‘\/src’.<\/li>\n
- Install the ‘express-generator’ to the custom image.<\/li>\n
- Add the ‘package.json’ file that contains application profile and packages needed to the ‘\/src’ directory.<\/li>\n
- Install all nodejs packages needed for the project, based on the ‘package.json’ file.<\/li>\n
- Export the port 3000 with default exec start command ‘node hakase-app\/bin\/www’.<\/li>\n<\/ul>\n
Next, we will build out the custom image based on the docker-compose script.<\/p>\n
Create a new yml file ‘docker-compose.yml’ using vim.<\/p>\n
vim docker-compose.yml<\/p>\n
Paste the following configuration there.<\/p>\n
version: '3' \n \nservices: \n hakase-app: build: . volumes: - .\/hakase-app:\/src\/hakase-app ports: - \"3000:3000\" restart: always<\/pre>\n
Save and exit.<\/p>\n
![\"Create](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-6.png\" "\\"\\"")
<\/a><\/p>\nWe’re creating a new docker service named ‘hakase-app’, and in the same time we’re building the custom docker image based on the ‘Dockerfile’ on the project directory and will mount automatically the hakase-app application files.<\/p>\n
The Nodejs Express Setup has been completed.<\/p>\n
Step 4 – Build and Run the Project<\/h2>\n
Login as the ‘mohammad’ user and go to the ‘project’ directory<\/p>\n
su – mohammad
cd project\/<\/p>\nBuild the image and create the docker service hakase-app using the docker-compose command below.<\/p>\n
docker-compose build<\/p>\n
Now you will get the result as shown below.<\/p>\n
![\"Build](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-7.png\" "\\"\\"")
<\/a><\/p>\nAnd when its complete, run the ‘hakase-app’ docker service.<\/p>\n
docker-compose up -d<\/p>\n
Following is the result.<\/p>\n
![\"Use](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-8.png\" "\\"\\"")
<\/a><\/p>\nThe custom docker image for our Nodejs application has been created, and the hakase-app docker service is up and running.<\/p>\n
Step 5 – Testing<\/h2>\n
Show available docker image on the server.<\/p>\n
docker-compose images
docker images<\/p>\n![\"Show](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-9.png\" "\\"\\"")
<\/a><\/p>\nA new custom docker image for our Nodejs application has been created.<\/p>\n
Show the running docker service.<\/p>\n
docker-compose ps
docker ps<\/p>\n![\"Show](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-10.png\" "\\"\\"")
<\/a><\/p>\nThe Nodejs app is up and running on the host port 3000.<\/p>\n
Open the web browser and type the server IP address with the port.<\/p>\n
http:\/\/10.0.15.2:3000\/<\/a><\/p>\n
And you will get the simple express page.<\/p>\n
![\"Page](\"https:\/\/afaghhosting.net\/blog\/wp-content\/uploads\/2018\/09\/docker-guide-dockerizing-nodejs-express-application-on-ubuntu-18-04-11.png\" "\\"\\"")
<\/a><\/p>\nDockerizing Nodejs Express application on Ubuntu 18.04 has been completed successfully.<\/p>\n
Reference<\/h2>\n
\nAbout Muhammad Arul<\/strong><\/p>\n
Muhammad Arul is a freelance system administrator and technical writer. He is working with Linux Environments for more than 5 years, an Open Source enthusiast and highly motivated on Linux installation and troubleshooting. Mostly working with RedHat\/CentOS Linux and Ubuntu\/Debian, Nginx and Apache web server, Proxmox, Zimbra Administration, and Website Optimization. Currently learning about OpenStack and Container Technology.<\/p>\n<\/div>\n
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<\/a><\/p>\n