Overview of Project ☁️

This project involves deploying a To-Do List web application using a two-tier architecture on AWS. The architecture is designed for scalability, security, and cost-effectiveness by leveraging EC2 instances for the application layer and Amazon RDS for the database layer, with an Application Load Balancer (ALB) to distribute traffic.

• Application Layer: Two EC2 instances host the Node.js application, ensuring high availability.
• Database Layer: Amazon RDS is used to manage a MySQL database, storing application data securely.
• Load Balancing & Routing: An Application Load Balancer (ALB) distributes incoming requests across both EC2 instances for fault tolerance.
• Security & Networking: Security Groups, IAM roles, and VPC configurations are implemented for secure communication between components.

Services Used 🛠

1. Amazon EC2: Hosts the web application on two instances for redundancy and performance. [Compute]
2. Amazon RDS: Provides a managed relational database (MySQL) for application data. [Database]
3. Application Load Balancer (ALB): Distributes traffic across EC2 instances for scalability and reliability. [Networking]
4. Amazon VPC: Ensures secure networking with separate subnets for EC2 and RDS. [Networking]
5. IAM Roles and Policies: Grants necessary permissions for secure interactions between services. [Security]
6. Security Groups: Controls traffic flow between ALB, EC2, and RDS to enforce security. [Security]

Architectural Diagram ✍️

Estimated Time & Cost ⚙️

• This project is estimated to take about 2-3 hours
• Cost: Free Tier Eligible (ALB costs according to the usage time)

Steps to be performed 👩‍💻

In the next few lessons, we'll be going through the following steps.

1. Pre-requisites
2. Setup VPC and Networking
3. Database Layer - Setup RDS 
4. Application Layer - Setup EC2 and Load balancer

Clean Up🗑️

• Delete ALB:
  • Navigate to the EC2 Console, go to the Load Balancers section, and delete the ALB.
• Terminate EC2 Instances:
  • In the EC2 Console, stop and terminate the 2 Webserver instances and the Bastion Host instance.
• Delete RDS Instance:
  • In the RDS Console, delete the database instance, ensuring backups are created if needed.
• Detach and Delete IGW:
  • In the VPC Console, detach and delete the Internet Gateway from the VPC.
• Delete Subnets and Route Tables:
  • Remove all subnets and route tables associated with the project in the VPC Console.
• Delete Security Groups:
  • Navigate to the EC2 Console, and delete custom security groups created for this project.
• Delete VPC:
  • Ensure all dependencies are removed, then delete the VPC.