Tf AWS Bastion S3 Keys

Abstract

1. Introduction

A Terraform module for creating resilient bastion host using auto-scaling group (min=max=desired=1) and populate its ~/.ssh/authorized_keys with public keys fetched from S3 bucket.

This module can append public keys, setup cron to update them and run additional commands at the end of setup. Note that if it is set up to update the keys, removing a key from the bucket will also remove it from the bastion host.

2. Objective

A Terraform module for creating bastion host on AWS EC2 and populate its ~/.ssh/authorized_keys with public keys from bucket

This project demonstrates how HCL, Terraform can be applied to a real-world Blockchain & Cloud Computing problem.

4. Technology Stack

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

• Terraform CLI
• Cloud provider account (e.g. AWS) with CLI configured
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/terraform-community-modules/tf_aws_bastion_s3_keys.git
cd tf_aws_bastion_s3_keys

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

• Add a CI/CD pipeline with GitHub Actions
• Deploy to a public test network or cloud free tier
• Add monitoring and cost alerts

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

1. Why does this problem need a blockchain or cloud-native design?
2. Explain the smart contract / infrastructure components and how they interact.
3. How are gas costs or cloud costs kept under control?
4. How is the system secured (keys, IAM, access control)?
5. How would the solution scale to many more users?

9. Source Code & License

This project is developed by terraform-community-modules and published on GitHub under the Apache License 2.0. Please follow the license terms and credit the original author when you use or modify this code.