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3-Tire-Architecture-Aws-Infrastructer-

README: Terraform Configuration for EC2 Instances

Overview

This Terraform configuration creates two EC2 instances on AWS: a public instance and a private instance. The public instance is accessible from the internet, while the private instance is only accessible from within the VPC.

Requirements

• An AWS account with necessary permissions.
• Terraform installed on your local machine.

Configuration

1. Provider:

• The provider "aws" block configures the AWS provider with the specified region and credentials.

2. VPC and Subnets:

• The aws_vpc resource creates a VPC with a CIDR block of 10.0.0.0/16.
• The aws_subnet resources create public and private subnets within the VPC.

3. Security Groups:

• The aws_security_group resources define security groups for the public and private instances.
  • The public security group allows SSH (port 22) and HTTP (port 80) access from anywhere.
  • The private security group currently allows SSH access from anywhere. Adjust this based on your security requirements.

4. EC2 Instances:

• The aws_instance resources create the public and private EC2 instances.
  • The public instance is associated with the public subnet and uses the public security group.
  • The private instance is associated with the private subnet and uses the private security group.

Usage

1. Replace placeholders: Replace the placeholders for your AWS credentials and AMI ID with your actual values.
2. Initialize Terraform: Run terraform init in your project directory.
3. Plan and Apply: Run terraform plan to preview the changes and terraform apply to create the infrastructure.

Customization

• AMI: Modify the ami property to use a different AMI.
• Instance Type: Adjust the instance_type to choose a different instance type.
• Security Groups: Modify the security groups to allow or restrict access to specific ports and IP addresses.
• Tags: Add or remove tags to organize your instances.

Additional Notes

• This configuration provides a basic example. You may need to adjust it based on your specific requirements and security best practices.
• Consider using IAM roles to manage access to your instances.
• Implement monitoring and logging to track the health and performance of your EC2 instances.