Deploy your Node Js app on Aws Elastic Beanstalk

#node #javascript #aws #cloud

Today we will learn how to deploy our simple api on the elastic bean stalk service on AWS.

Prerequisite

Check if eb cli and git cli is installed on your machine, run:

Setup

npm init -y to initialize your app.

Click here for a simple express starter hello world app.

Install express package and dump this code in your index.js file


const express = require('express')
const app = express()
const port = process.env.PORT|| 3000;

app.get('/', (req, res) => {
  res.send('Hello World!')
})

app.listen(port, () => {
  console.log(`Example app listening on port ${port}`)
})

Let's write a start script to run our server in `package.json`

Create a .gitignore file and add this:

node_modules/
.gitignore
.elasticbeanstalk/

Git setup on our project

git init
git add .
git commit -m "initial commit"

Deploy on elastic beanstalk AWS instance

Let's look at how we can initialize our AWS instance.

Run eb init with flags

eb init --platform node.js --region us-east-2

The above command creates the .elasticbeanstalk folder

.ebextension

After initializing your Eb, create a folder .ebextensions and a file nodecommands.config

We put our start command in the nodecommands.config

option_settings:
    aws:elasticbeanstalk:container:nodejs:
        NodeCommand: "npm start"

Create the application environment (Deployment)

eb create [environment-name]
The is the name of your application, in this example I used elasticbean hence the command is [eb create elasticbean]

with flags run: eb create --sample [your project folder name]

Note: avoid the use of _ when naming your project folders

Deploy your application

eb deploy

To open your eb app

eb open

more commands

eb logs
eb --help
eb setenv [VAR_NAME=VALUE] note: do not include the square brackets

To delete eb init project

Go to the directory of your project (the directory where you originally ran the "eb init" command). Delete the . elasticbeanstalk directory. You can now run "eb init" again, and it will prompt you for your configuration information.