Custom GPT Action (API) Template (Poetry-FastAPI-SQLModel-Postgres-Kafka-Kong-Docker-DevContainer)

Overview

This project provides a template for building OpenAI Custom GPT Actions with microservice pattern using Event Driver Architecture. . The template leverages various technologies and tools to facilitate efficient development, testing, deployment, and CI/CD. The core technologies and their roles are as follows:

Technologies Used

Backend Technologies

• Python: The primary programming language used for developing GPT Actions.
• Poetry: Dependency management and packaging tool for Python projects.
• FastAPI: Modern, fast (high-performance) web framework for building APIs with Python 3.7+ based on standard Python type hints.
• SQLModel: SQL databases in Python, designed for simplicity, compatibility, and robustness. It’s built on top of Pydantic and SQLAlchemy.
• Postgres: Powerful, open-source object-relational database system.
• Kafka: Distributed event streaming platform capable of handling trillions of events a day.
• Kong: Cloud-native, fast, scalable, and distributed API gateway.

Containerization and Development

• Docker: Platform for developing, shipping, and running applications in containers.
• DevContainer: Development environments hosted in containers to ensure consistency across different environments.

Deployment and Testing

• Kubernetes: Container orchestration system for automating deployment, scaling, and management of containerized applications.
• Terraform: Infrastructure as Code (IaC) tool that lets you define both cloud and on-prem resources in human-readable configuration files that you can version, reuse, and share.
• testcontainers: Provides lightweight, disposable instances of common databases, Selenium web browsers, or anything else that can run in a Docker container, for testing.
• GitHub Actions: CI/CD tool that automates workflows, including testing and deployment.

Client Tools

• VSCode: Free source-code editor made by Microsoft for Windows, Linux, and macOS.
• PgAdmin: Open-source administration and development platform for PostgreSQL.

Architecture Overview

The template is designed with a microservice pattern and Event-Driven Architecture to ensure each GPT Action is isolated, scalable, and easy to manage. Here’s an overview of how the components interact:

1. Microservices: Each component is a separate microservice built using FastAPI and SQLModel, containerized with Docker.
2. Event-Driven Architecture: Kafka is used for event streaming, enabling real-time data processing and communication between microservices.
3. API Gateway: Kong serves as the API gateway, routing requests to the appropriate microservice.
4. Database: Postgres is used for persistent data storage.
5. Development Environment: DevContainer ensures a consistent development environment, and VSCode provides a powerful IDE.
6. Deployment: Kubernetes manages the containerized applications, and Terraform handles infrastructure provisioning.
7. CI/CD: GitHub Actions automate the testing and deployment processes.
8. Testing: testcontainers facilitate isolated and reliable testing environments.

Key Concepts and Technologies

1. Microservice Architecture:

   • Microservices break down the application into smaller, independent services that can be developed, deployed, and scaled independently.
   • Benefits: Scalability, flexibility, and resilience.

2. Event-Driven Architecture:

   • Utilizes events to trigger and communicate between decoupled services.
   • Benefits: Real-time data processing, improved scalability, and fault tolerance.

3. FastAPI:

   • High-performance, easy-to-use web framework for building APIs.
   • Benefits: Automatic interactive API documentation, high performance, and easy integration with asynchronous libraries.

4. SQLModel:

   • Simplifies working with SQL databases and provides a convenient way to define models and perform queries.
   • Benefits: Combines the power of SQLAlchemy and Pydantic, type annotations, and easy model definition.

5. Postgres:

   • Robust and reliable relational database system.
   • Benefits: ACID compliance, extensibility, and strong community support.

6. Kafka:

   • Distributed event streaming platform for high-throughput, low-latency data processing.
   • Benefits: Scalability, durability, and fault-tolerance.

7. Kong:

   • API gateway for managing, monitoring, and securing API requests.
   • Benefits: Load balancing, rate limiting, and request transformation.

8. Docker:

   • Simplifies the development and deployment process by packaging applications in containers.
   • Benefits: Consistency across environments, isolation, and portability.

9. Kubernetes:

   • Manages containerized applications across multiple hosts, providing deployment, scaling, and management capabilities.
   • Benefits: Automated scaling, self-healing, and efficient resource utilization.

10. Terraform:

    • Infrastructure as code tool for provisioning and managing cloud infrastructure.
    • Benefits: Version control, automation, and reproducibility.

11. Testcontainers:

    • Enables running Docker containers for integration tests, ensuring a consistent testing environment.
    • Benefits: Reliable testing, isolation, and easy setup.

12. GitHub Actions:

    • Automates workflows for building, testing, and deploying applications.
    • Benefits: Continuous integration and delivery, automation, and integration with GitHub repositories.

Setting Up the Development Environment

1. Clone the Repository:

   git clone https://github.com/your-repo/openai-custom-gpt-action-template.git
   cd openai-custom-gpt-action-template

2. Install Dependencies:

   poetry install

3. Run the Application:

   poetry run uvicorn src.main:app --reload

4. Run Tests:

   poetry run pytest

Deploying with Docker and Kubernetes

1. Build Docker Image:

   docker build -t custom-gpt-action-template .

2. Run Docker Container:

   docker compose up

3. Deploy to Kubernetes:

   kubectl apply -f k8s-deployment.yml

4. Manage Infrastructure with Terraform:

   terraform init
   terraform apply

CI/CD with GitHub Actions

1. Configure GitHub Actions Workflow:
   • The CI/CD pipeline is defined in .github/workflows/ci-cd.yml.
   • Ensure your repository has the necessary secrets configured for Docker, Kubernetes, and other integrations.

Benefits of Using These Technologies Together

1. Modularity: Each component can be developed, tested, and deployed independently, allowing for greater flexibility and maintainability.
2. Scalability: Easily scale individual services based on demand, ensuring optimal resource utilization.
3. Reliability: Enhanced fault tolerance and resilience through service isolation and event-driven communication.
4. Efficiency: Streamlined development and deployment processes with Docker, Kubernetes, and CI/CD integration.
5. Consistency: Consistent development, testing, and production environments using containers and infrastructure as code.

By leveraging these technologies, this template provides a robust foundation for developing, testing, and deploying OpenAI Custom GPT Actions in a microservice pattern using event-driven architecture.