How to Deploy a Web App on AWS: A Step-by-Step Guide

Deploying a web application on Amazon Web Services (AWS) gives you scalable, reliable infrastructure. This tutorial covers the core steps, from choosing a compute service to going live. Whether you are using a simple static site or a dynamic app, these essentials will get you started.

Before you begin, ensure you have an AWS account, your application code ready (e.g., built with Node.js, Python, or any framework), and basic familiarity with the AWS Management Console. You’ll also need an S3 bucket if you plan to serve static assets separately.

Choose Your Compute Service

AWS offers several options for hosting a web app. For full control and flexibility, use Amazon EC2 – launch a virtual server (instance), install your runtime, and manage everything yourself. For faster deployment without managing servers, use AWS Elastic Beanstalk – it automatically handles capacity provisioning, load balancing, and scaling. For serverless apps, consider AWS Lambda with API Gateway, but this guide focuses on EC2 and Elastic Beanstalk.

Set Up the Environment

• For EC2: Launch an instance (e.g., Amazon Linux or Ubuntu). Configure security groups to allow HTTP (port 80) and SSH (port 22). Install your web server (Nginx or Apache) and runtime (Node.js, Python, etc.). Upload your code via SCP or Git.
• For Elastic Beanstalk: Open the Elastic Beanstalk console, create a new environment, select your platform (e.g., Node.js, Python, Docker), and upload your application zip file. Elastic Beanstalk provisions an EC2 instance, an Auto Scaling group, and a load balancer automatically.

Deploy Your Code and Database

After your environment is ready, deploy your code. For EC2, copy the files to the server (e.g., /var/www/html) and start the web server. For Elastic Beanstalk, upload a new version via the console or CLI and deploy. If your app uses a database, create an Amazon RDS instance (e.g., MySQL or PostgreSQL) and update your app’s connection string to point to that RDS endpoint. Always test locally first.

Configure Domain and Enable Scaling

Map your custom domain (e.g., myapp.com) to your AWS resource using Amazon Route 53. Point a DNS record (A or CNAME) to your EC2 instance’s public IP or Elastic Beanstalk’s environment URL. To handle traffic spikes, enable auto scaling: for EC2, set up an Auto Scaling group; Elastic Beanstalk does this by default. Use Elastic Load Balancing to distribute incoming traffic across multiple instances.

Deploying on AWS may seem complex, but by following these steps—choosing the right service, setting up the environment, deploying code, and managing scaling—you can have your web app live in hours. Start small, test thoroughly, and leverage AWS’s free tier to experiment without upfront costs.