How I Built a Terraform AWS 3-Tier Platform — Modules, VPC, and Least-Privilege Security Groups

Short summary

Comprehensive Terraform tutorial for deploying a production-ready 3-tier AWS infrastructure: public frontend with EC2 and Nginx, private application tier accessible only from frontend, and isolated backend with least-privilege security groups. Covers VPC setup, modular code organization, ALB load balancing, Auto Scaling, DynamoDB state locking, CloudWatch monitoring, and includes complete GitHub source code.

• •3-tier architecture with strict access controls: public frontend, private application, isolated backend
• •Security-first design using least-privilege security groups and modular Terraform modules
• •Production-ready infrastructure includes ALB, Auto Scaling, state locking, monitoring, and CI/CD

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