How to Build a Scalable AWS Architecture Using EC2, Load Balancer, and Auto Scaling

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Modern cloud applications require more than a single server to handle variable traffic, maintain uptime, and recover from failures automatically. A scalable AWS architecture combines Amazon EC2 instances, an Application Load Balancer, and Auto Scaling groups within a Virtual Private Cloud to distribute and manage workloads efficiently. The Load Balancer routes incoming user requests across multiple EC2 instances, while Auto Scaling adjusts the number of active servers in response to real-time demand. Security Groups act as virtual firewalls, ensuring EC2 instances only accept traffic from the Load Balancer rather than the public internet. Terraform is used to automate the provisioning of this entire infrastructure as code, enabling consistent, repeatable deployments through CI/CD pipelines.

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