AWSTransactionalApps

A reusable Python CDKTF package that provisions the complete AWS Transactional Apps architecture, uploads all required runtime scripts to an S3 deployment bucket, and provides a sample project to validate the package.

Features

• EC2 Instance Provisioning: Creates EC2 instances with proper IAM roles and instance profiles
• S3 Script Deployment: Automatically uploads runtime scripts (setup, loader, bootstrap, update) to S3
• ECR Integration: Conditional ECR repository creation for Docker images
• RDS Support: Optional PostgreSQL RDS instance creation
• Secrets Manager: Integrated secrets management for application configuration
• SystemD Services: Includes systemd service and timer configurations

Architecture Components

• setup.sh: Initial EC2 setup script downloaded via user data
• loader.sh: Application loader script
• bootstrap.sh: Runtime bootstrap script
• update.sh: Application update script
• docker-compose.yml: Docker Compose configuration template
• SystemD services: awsec2-loader.service, awsec2-app.service, awsec2-app-update.timer

Installation

Prerequisites

• Python 3.8+
• Node.js 16+ (for CDKTF)
• AWS CLI configured with appropriate credentials
• Terraform 1.0+

Install the Package Locally

# Clone the repository
cd /Repos/AWSTransactionalApps

# Create virtual environment
python3 -m venv venv
source venv/bin/activate

# Install the package in editable mode
pip install -e AWSTransactionalApps/

Quick Start

Using the Sample Project

# Navigate to sample directory
cd /Repos/AWSTransactionalApps/sample

# Install sample project dependencies
pip install -r requirements.txt

# Generate CDKTF provider bindings (first time only)
cdktf get

# Synthesize Terraform configuration
cdktf synth

# Review the Terraform plan
cdktf diff

# Deploy the infrastructure
cdktf deploy

Usage

Basic Usage

from cdktf import App
from AWSTransactionalAppsStack import DockerEC2

app = App()

DockerEC2(
    app,
    "my-app-stack",
    project_name="my-project",
    region="us-east-1",
    ami_id="ami-0c2b8ca1dad447f8a",
    instance_type="t4g.medium",
    disk_size=100,
)

app.synth()

Configuration Options

IAM Permissions

The EC2 instance is provisioned with the following IAM permissions:

• ec2:DescribeTags
• ec2:DescribeInstances
• s3:GetObject
• s3:ListBucket
• ecr:GetAuthorizationToken
• ecr:BatchGetImage
• ecr:BatchCheckLayerAvailability
• ecr:GetDownloadUrlForLayer
• secretsmanager:GetSecretValue
• secretsmanager:ListSecrets
• secretsmanager:DescribeSecret
• logs:CreateLogGroup
• logs:CreateLogStream
• logs:PutLogEvents

Project Structure

AWSTransactionalApps/
├── setup.py
├── pyproject.toml
├── README.md
├── requirements.txt
└── AWSTransactionalAppsStack/
    ├── __init__.py
    ├── config.py
    ├── DockerEC2.py
    ├── uploader.py
    ├── iam/
    │   └── ec2_policy.json
    └── scripts/
        ├── setup/
        │   └── setup.sh
        ├── loader/
        │   └── loader.sh
        ├── runtime/
        │   ├── bootstrap.sh
        │   └── update.sh
        ├── systemd/
        │   ├── awsec2-loader.service
        │   ├── awsec2-app.service
        │   └── awsec2-app-update.timer
        └── compose/
            └── docker-compose.yml

Development

Running Tests

# From the package directory
pip install pytest
pytest tests/

Building the Package

pip install build
python -m build

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Submit a pull request

License

MIT License - see LICENSE file for details.

Support

For issues and feature requests, please visit: https://dev.azure.com/buzzerboyinc/buzzerboy