AWS Multi-Tier Web Application Infrastructure - Terraform

This project is a modular Infrastructure as Code that provisions a multi-tier web application infrastructure on AWS using terraform.

Key Features:

• Highly Available: Auto Scaling Groups with Multi-AZ deployments ensure minimal downtime and fault tolerance.
• Scalable, Elastic and Cost-Effective:: Auto Scaling policies and CloudWatch alarms dynamically adjust resources based on CPU utilization, optimizing both performance and cost 💰.
• High Performance: Load Balancers (ALBs) efficiently distribute traffic across web and app tiers, enhancing responsiveness and user experience.
• Robust Security: An AWS WAF that blocks suspicious IPs, anonymous proxies and IP addresses that have been identified as actively engaging in malicious activities (from MadPot), while comprehensive Security Groups enforce strict inter-tier communication controls.
• Reliable, Performant & Scalable Database: A Multi-AZ RDS cluster with a primary instance and read replica is deployed to handle demanding workloads, improve read performance, and ensure data redundancy.
• Tiered Architecture: Separation of concerns enhances manageability, scalability, and security by isolating different components.

Showcasing:

• Automating and managing cloud infrastructure with Infrastructure as Code using Terraform.
• Architecting Resilient, Secure, Reliable, Cost-Effective and Scalable Cloud Infrastructure on AWS ☁️.
• Optimizing reusability and scalability by structuring Terraform code into self-contained modules.

Diagram

Modules

├── modules
│   ├── asgs
│   │   ├── main.tf
│   │   └── variables.tf
│   ├── lbs
│   │   ├── main.tf
│   │   └── variables.tf
│   ├── rds
│   │   ├── main.tf
│   │   └── variables.tf
│   ├── security-groups
│   │   ├── main.tf
│   │   └── variables.tf
│   ├── vpc
│   │   ├── main.tf
│   │   └── variables.tf
│   └── waf
│       ├── main.tf
│       └── variables.tf

Prerequisites

• AWS account with appropriate permissions.
• Terraform installed.

Usage

1. Clone the repository.
2. Check main.tf for an example of using modules and Add variables values (whether cli args or TF_VAR env vars or .tfvars .auto.tfvars or defaults in variables.tf)
3. Run terraform init to initialize the Terraform project.
4. Run terraform plan to preview the changes.
5. Run terraform apply to deploy the infrastructure.

To destroy the infrastructure, run terraform destroy.