Understanding AWS EC2 in Under 3 minutes

AWS EC2 (Elastic Compute Cloud) lets you rent virtual machines on demand in the cloud — pay only for what you use. It's like having your own server, but elastic, scalable, and ready in minutes.

Why Use EC2?

• Elasticity: Scale up or down based on demand

• Pay-as-you-go: Only pay for active time and resources

• Fully configurable: Choose OS, hardware, storage, networking

• Secure: IAM roles, SSH keys, and security groups protect your instances

Step-by-Step EC2 Setup

Let’s walk through the EC2 setup with the following example in mind. Say you’re building a handcrafted jewelry e-commerce app and want to deploy it on AWS for 100 users.

Your stack includes:

• Frontend: React

• Backend: Node.js / Express

• Static assets: Product images

1. Choose an AMI (Amazon Machine Image)

An AMI is a pre-configured OS image (like Ubuntu or Windows).
It includes the OS and optional runtime packages.

2. Choose an Instance Type

This defines the virtual hardware — CPU, memory, networking.

• General Purpose (t3.small) – Balanced for small apps

• Compute Optimized – For CPU-heavy tasks

• Memory Optimized – For in-memory apps

• Storage / GPU Optimized – For ML or big data

3. Configure the Instance

Here you define how the instance behaves in your network.

• Public IP: Enable auto-assign

• IAM Role: Attach if you need S3 access

• Shutdown behavior: Set to "Stop"

• Number of instances: 1 (for now)

4. Add Storage

Attach volumes (disks) to your instance:

• EBS (Elastic Block Store) = persistent block storage

• Ephemeral storage = temporary, deleted on stop

• S3 = external object storage (not directly mounted)

5. Add Tags

Tags are key-value pairs to help identify and organize AWS resources.

6. Configure Security Group

Security groups act like virtual firewalls — they control inbound and outbound traffic to/from your instance.

7. Review and Launch

• Review your settings

• Create a new key pair (RSA) — download the .pem file

• This key is how you SSH (log in) to your EC2 securely

Note for Windows users:
Use PuTTY + PuTTYgen to convert .pem → .ppk and log in to your EC2 instance.

After Setup: Deploying Your Jewelry Website

Once your EC2 is live, you can deploy your static site using one of the following:

• Nginx – Best choice for static sites, fast and production-ready

• Apache – Good alternative, heavier than Nginx

• http-server or python3 -m http.server – Quick dev/testing tools

• Docker – For running containerized apps

💡 Nginx is the most common choice — it’s lightweight, fast, secure, and works great for serving static files.

Final Thought

AWS EC2 gives you the flexibility, control, and scalability to run anything from a static website to a full production app — all without owning a single physical server.