Inteliny
CloudLevel: Intermediate15m•Verified Production Blueprint

How to Deploy a MERN Stack App on AWS EC2

A professional-grade deployment blueprint for scalable applications

Inteliny Protocol

Architecture Team

Overview & Architecture Scope

Deploying a MERN (MongoDB, Express, React, Node.js) application on AWS EC2 requires careful orchestration of security groups, reverse proxies, and process management. This guide provides an industry-standard workflow for production-ready deployment.

Prerequisites & System Requirements

Ensure your development workstation or staging server fulfills the following prerequisites before initiating commands:

Node.js v18.0+ runtime environment
MongoDB v6.0+ database cluster
Active AWS or Cloudflare account with DNS access
Linux Ubuntu 22.04 LTS server instance
Basic knowledge of CLI bash & Git workflow

Target System Architecture Diagram

Browser
NGINX
Node / Express
MongoDB / Redis

Interactive Execution Checklist

0/4 Completed

Step-by-Step Implementation Guide

1

Provisioning the EC2 Instance

Initialize an Ubuntu Server 22.04 LTS instance. Ensure your security groups allow inbound traffic on ports 22 (SSH), 80 (HTTP), and 443 (HTTPS).

Execute Command Terminal:

bash
ssh -i 'your-key.pem' ubuntu@your-instance-ip
Always store your .pem keys in a secure, non-public directory.
2

Environment Initialization

Update the system packages and install Node.js using the NodeSource repository for the latest stable version.

Execute Command Terminal:

bash
sudo apt update && sudo apt upgrade -y
curl -fsSL https://deb.nodesource.com/setup_18.x | sudo -E bash -
sudo apt-get install -y nodejs
3

Reverse Proxy Configuration with Nginx

Configure Nginx to act as a reverse proxy for your Node.js application. This handles SSL termination and provides a layer of security.

Execute Command Terminal:

bash
sudo apt install nginx -y
sudo nano /etc/nginx/sites-available/default
# Add proxy_pass http://localhost:5000;
Ensure your Node application is listening on the matching port (e.g., 5000).
4

Process Orchestration with PM2

Install PM2 to ensure your application restarts automatically on system reboots or crash events.

Execute Command Terminal:

bash
sudo npm install pm2 -g
pm2 start server.js --name inteliny-app
pm2 save
pm2 startup

Pro Tips & Optimizations

Use AWS Route 53 for DNS management to minimize latency.
Implement an AWS S3 bucket for static media storage instead of storing on the local disk.
Enable CloudWatch monitoring for real-time performance metrics.

Common Pitfalls to Avoid

Forgetting to allow port 80/443 in the VPC Security Group.
Hardcoding production environment variables instead of using .env files.
Running the Node.js process as the root user (Security Risk).
Conclusion & Next Steps

Your MERN application is now deployed behind a professional reverse proxy with automated process monitoring. Next steps include implementing CI/CD with Github Actions for seamless updates.

Production Best Practices & Hardening

Security Hardening

Disable root SSH access, enforce key-based auth, and enable UFW firewall on ports 80/443.

Memory Management

Set Node.js max-old-space-size to 80% of total RAM to avoid Linux OOM-killer crashes.

Frequently Asked Questions

Yes, all NGINX, Docker, and PM2 deployment steps can be packaged into Infrastructure as Code (IaC) playbooks.

Need Help Implementing This?

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How to Deploy a MERN Stack App on AWS EC2 | Inteliny Knowledge Base