🏗️ AWS 3-Tier Student Management App

• This project is a hands-on implementation of a 3-tier architecture using Amazon Web Services (AWS).
• It demonstrates how to set up a web-based Student Management System using core cloud components including a web server (NGINX), application server (Apache Tomcat), and database server (MySQL).

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📌 Project Architecture

Three-tier Architecture Components:

1. Presentation Layer (Web Tier):

   • NGINX server hosted on an EC2 instance
   • Handles incoming HTTP requests and forwards them to the application layer

2. Application Layer (App Tier):

   • Apache Tomcat on EC2
   • Processes logic and handles user requests

3. Database Layer (DB Tier):

   • MySQL database running on a private EC2 instance
   • Stores student data

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☁️ AWS Services Used

• EC2 – for hosting all three tiers
• VPC – with public and private subnets
• Internet Gateway & Route Tables – for internet access
• Security Groups & NACLs – for fine-grained access control
• Elastic IP – for static access to the web server
• SSH – for instance provisioning and setup

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🔧 Project Setup Steps

1. VPC Configuration

   • Create a custom VPC with CIDR block
   • Configure public and private subnets
   • Set up internet gateway and routing tables

2. Security Setup

   • Define security groups for each layer:
     • Web: Allow HTTP/HTTPS and SSH
     • App: Allow traffic from Web tier only
     • DB: Allow traffic from App tier only

3. Server Deployment

   • Launch EC2 instances for each layer
   • Install necessary services:
     • NGINX on Web tier
     • Java & Tomcat on App tier
     • MySQL on DB tier

4. App Configuration

   • Deploy the Student Management App on Tomcat
   • Configure NGINX reverse proxy to point to the App tier
   • Connect Tomcat to MySQL with JDBC driver and correct credentials

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📸 Screenshots

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🧪 Known Issue

Currently, the application UI loads but the data is not being stored in the MySQL database. Possible causes:

• Incorrect JDBC connection string
• MySQL port not open to the App server
• DB credentials mismatch

To Fix: Ensure security groups allow DB port (3306) from the App server and the JDBC config in web.xml is correct.

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📚 Learning Outcomes

• How to architect and deploy a 3-tier application on AWS
• Hands-on experience with EC2, VPC, Subnets, and Security Groups
• Configuration of NGINX, Tomcat, and MySQL in a cloud environment
• Understanding of private and public IP, EIP, NAT vs IGW

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🛠️ Tools & Technologies

AWS EC2 VPC NGINX Tomcat MySQL Linux Bash SSH Cloud Networking Web App Deployment

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🙋‍♀️ Author

Tejaswini Shirke
GitHub: Tejaswini2704

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