Skip to content

Instantly share code, notes, and snippets.

@piyushgarg-dev
Last active February 26, 2024 07:46
  • Star 89 You must be signed in to star a gist
  • Fork 92 You must be signed in to fork a gist
Star You must be signed in to star a gist
Save piyushgarg-dev/8b14c87c8ff4d626ecbc747b6b9fc57f to your computer and use it in GitHub Desktop.

Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Create Free AWS Account

Create free AWS Account at https://aws.amazon.com/

2. Create and Lauch an EC2 instance and SSH into machine

I would be creating a t2.medium ubuntu machine for this demo.

3. Install Node and NPM

curl -sL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt install nodejs

node --version

4. Clone your project from Github

git clone https://github.com/piyushgargdev-01/short-url-nodejs

5. Install dependencies and test app

sudo npm i pm2 -g
pm2 start index

# Other pm2 commands
pm2 show app
pm2 status
pm2 restart app
pm2 stop app
pm2 logs (Show log stream)
pm2 flush (Clear logs)

# To make sure app starts when reboot
pm2 startup ubuntu

6. Setup Firewall

sudo ufw enable
sudo ufw status
sudo ufw allow ssh (Port 22)
sudo ufw allow http (Port 80)
sudo ufw allow https (Port 443)

7. Install NGINX and configure

sudo apt install nginx

sudo nano /etc/nginx/sites-available/default

Add the following to the location part of the server block

    server_name yourdomain.com www.yourdomain.com;

    location / {
        proxy_pass http://localhost:8001; #whatever port your app runs on
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }
# Check NGINX config
sudo nginx -t

# Restart NGINX
sudo nginx -s reload

8. Add SSL with LetsEncrypt

sudo add-apt-repository ppa:certbot/certbot
sudo apt-get update
sudo apt-get install python3-certbot-nginx
sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com

# Only valid for 90 days, test the renewal process with
certbot renew --dry-run
@apurvjha123
Copy link

sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com when i do this my site goes down and shows, 404 Not Found
nginx/1.18.0 (Ubuntu) please help

@msi-end
Copy link

msi-end commented Jan 2, 2024

sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com when i do this my site goes down and shows, 404 Not Found nginx/1.18.0 (Ubuntu) please help

at the place of your 'yourdomain.com' insert your Domain name

@apurvjha123
Copy link

sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com when i do this my site goes down and shows, 404 Not Found nginx/1.18.0 (Ubuntu) please help

at the place of your 'yourdomain.com' insert your Domain name

i know that and did it

@msi-end
Copy link

msi-end commented Jan 2, 2024

sudo certbot --nginx -d yourdomain.com -d www.yourdomain.com when i do this my site goes down and shows, 404 Not Found nginx/1.18.0 (Ubuntu) please help

Check the logs for any errors or issues during the renewal process
sudo cat /var/log/letsencrypt/letsencrypt.log
if there is not any error then restart the NGINX .
sudo service nginx restart

@anuragdas2001
Copy link

502 Bad Gateway
nginx/1.18.0 (Ubuntu)
I am getting this error in place of welcome to nginx

@prnv404
Copy link

prnv404 commented Jan 3, 2024

@anuragdas2001 check your node app running or not

@apurvjha123
Copy link

Alright so, It was Working fine from 2+ months but suddenly the site was down and when i went to its IPv4 port it shows 502 Bad Gateway

nginx/1.18.0 (Ubuntu) and whatever i try i get this. So here is detail explanation of my error

hostinger hosting :-
image

This is the error I get
image

this is when i apporved certbot
image

this the pm2 log after the nginx error
image

when i do sudo cat /var/log/letsencrypt/letsencrypt.log , this seems fine
image

and this is my projects index.js

const express = require('express');
const app = express();
require('dotenv').config();
const port = 8000;
const cors = require('cors');
const fileUpload = require('express-fileupload');
const controller = require('./routes/routes.control');
const register = require('./routes/routes.register');
const mongoose = require("mongoose");
const path = require('path');
const cookieParser = require('cookie-parser');
app.use(cookieParser());

// MongoDB Connection
mongoose
.connect(process.env.MONGOOSE_SECRET_KRY)
.then(() => console.log("DB connection successful!"))
.catch((error) => console.log(error));

app.use(cors({
origin: true,
credentials: true
}));

app.use(express.json());
app.use(fileUpload());

// Redirect www to non-www
app.use((req, res, next) => {
if (req.headers.host.startsWith('www.')) {
const newHost = req.headers.host.slice(4);
return res.redirect(301, ${req.protocol}://${newHost}${req.originalUrl});
}
next();
});

app.use('/apis', controller);
app.use('/registers', register);

if (process.env.NODE_ENV === 'production') {
app.use(express.static(path.join(__dirname, 'build')));

app.get('*', (req, res) =>
res.sendFile(path.resolve(__dirname, 'build', 'index.html'))
);
} else {
app.get('/', (req, res) => res.send('Please set to production'));
}

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

app.listen(process.env.PORT || port, () => {
console.log(Example app listening on port ${port});
});

Please someone help, thanks !

@msi-end
Copy link

msi-end commented Jan 4, 2024

Hey dear your site (https://chit-chat.tech/) is working fine .

image

Also working fine with http://65.1.84.246:8000/
image

I think your port 80 is not working properly .
Run netstat -tulpn and saw nginx not binding to port 80 for IPv4 or not.
Make sure the sites-available file with the default_server is actually enabled.
nginx -t to check linkage .
sudo ufw status to check all ports .

@apurvjha123
Copy link

ya it is working in other browser but not in chrome, please help me i have been struck in this more 2 months,

it is connected to port 80
image

sites-available file with the default
image

image

this is error log
image
listen 80
image

it will be great help . Thanks!

@Adityavikram3112
Copy link

I ran the "sudo certbot --nginx -d assistanza.com" command but I keep on running into the following error :
image
image
Do help me out not able to find much online

@agaur79
Copy link

agaur79 commented Jan 8, 2024

@piyushgarg-dev - Thanks for summarizing this in detail, really appreciate you making this document.
I would to add one point that made me a little bit of struggle, I hope this will help other people.

We need to enable the HTTPS port 443 in the AWS security group so that it is accessible to the outside world.
It took me a lot of time to figure it out.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment