Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt
Create free AWS Account at https://aws.amazon.com/
I would be creating a t2.medium ubuntu machine for this demo.
curl -sL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt install nodejs
node --version
git clone https://github.com/piyushgargdev-01/short-url-nodejs
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
sudo ufw enable
sudo ufw status
sudo ufw allow ssh (Port 22)
sudo ufw allow http (Port 80)
sudo ufw allow https (Port 443)
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
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
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
hostinger hosting :-
This is the error I get
this is when i apporved certbot
this the pm2 log after the nginx error
when i do sudo cat /var/log/letsencrypt/letsencrypt.log , this seems fine
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 !