AWS EC2 WEB SERVER Infrastructure with Terraform

This project defines an AWS web server infrastructure setup using Terraform. The configuration includes an EC2 instance running Ubuntu, with a security group allowing HTTP, HTTPS, and SSH access. Additionally, the instance is configured to install and run Nginx automatically.

Prerequisites

• Terraform: Ensure you have Terraform version 1.10.3 or later installed.
• AWS CLI: Install and configure the AWS CLI with appropriate credentials.
• SSH Key Pair:
  • A public key located at ~/.ssh/id_rsa.pub.
  • A private key located at ~/.ssh/id_rsa_tf.
• Graphviz (optional): For generating dependency graphs with terraform graph.

Resources Created

1. AMI: Fetches the latest Ubuntu AMI based on provided filters.
2. EC2 Instance:
   • Instance type: t2.micro
   • Ubuntu 24.04
   • Automatically installs and configures Nginx.
3. Key Pair: Adds an existing SSH public key to AWS for secure access or generate the new one.
4. Security Group: Configures inbound rules for HTTP (port 80), HTTPS (port 443), and SSH (port 22).
5. Ingress and Egress Rules:
   • Ingress rules allow specific traffic as defined in security_group_rules.
   • Egress rule allows all outbound traffic.

Variables

Input Variables

Variable	Type	Description
instance_detail	Map	Details about the instance configuration.
instance_kp	Map	Details about the key pair.
instance_security_group	Map	Details about the security group.
security_group_rules	Map	Ingress rules for the security group.
public_key_path	String	Path to the SSH public key.
private_key_path	String	Path to the SSH private key.

Usage

1. Initialize Terraform:

   terraform init

2. Validate Configuration Syntax:

   terraform validate

3. Plan the Infrastructure:

   terraform plan

4. Apply the Configuration:

   terraform apply --auto-approve

5. Check Logs: Logs for the instance creation are written to instance.log.

6. Access the EC2 Instance: Use the private key to SSH into the instance:

   ssh -i ~/.ssh/id_rsa ubuntu@<instance_public_ip>

Additional Commands

• Generate Dependency Graph:

  terraform graph | dot -Tpdf > graph.pdf

  Requires Graphviz to be installed.

• Destroy Infrastructure: To delete all created resources:

  terraform destroy --auto-approve

Notes

• Ensure your AWS credentials are properly configured using the AWS CLI or environment variables.
• Adjust security_group_rules as needed to limit access based on your requirements.
• Modify instance_detail to select the desired AMI, instance type, and region.