Reusable Backend Base

This repository provides a clean, reusable FastAPI backend foundation intended to be forked and extended by other projects such as Kubernetes-based systems or multi-cloud deployments.

This repository is not a standalone production service and is not deployed independently.

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Purpose

The purpose of this repository is to act as a base backend platform that can be reused across multiple future projects.

It provides:

• Clean API structure
• Clear separation between API and business logic
• Dockerized runtime
• Unit-testable service layer
• Cloud-agnostic design

This backend will be reused by:

• Kubernetes AI project
• Multi-cloud DevOps project
• Future backend systems

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Architecture Overview

	Request  
	   ↓  
API Layer (FastAPI Routers)  
	   ↓  
Service Layer (Pure Python Logic)  
	   ↓  
	Response

Design Principles

• APIs are thin (no business logic)
• Services contain reusable logic
• Configuration via environment variables
• Same code runs locally, in Docker, cloud, and Kubernetes

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Project Structure

app/  
├── api/              — API routes (HTTP layer only)  
├── services/         — Core reusable logic  
├── main.py           — Application entry point  
tests/                — Unit tests for service layer  
Dockerfile             — Production-ready Docker image  
requirements.txt       — Python dependencies  

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Available APIs

Health Check

GET /health

Used for:

• Liveness checks
• Orchestration systems
• Monitoring

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Service Info

GET /info

Returns service metadata:

• Service name
• Version
• Environment

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Generic Processing API

POST /api/process

Example request:

{
  "text": "hello world"
}

Example response:

{
  "original": "hello world",
  "length": 11,
  "uppercase": "HELLO WORLD"
}

This endpoint is intentionally generic and will be extended by downstream projects.

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Docker Usage

Build Image

docker build -t backend-base:latest .

Run Container

docker run -p 8000:8000 backend-base:latest

Access endpoints:

• http://localhost:8000/health
• http://localhost:8000/docs

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Testing

Run unit tests:

pytest

Tests focus on the service layer, not the API transport layer.

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Reuse Strategy

This repository is intended to be:

• Forked by other projects
• Extended with project-specific logic
• Integrated with cloud, Kubernetes, and CI/CD in downstream projects
• Downstream projects should not modify this repository directly.

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What This Repository Does NOT Include

• CI/CD pipelines
• Cloud deployments
• Kubernetes manifests
• Databases
• Authentication or authorization These concerns are intentionally handled in downstream projects.

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Design Philosophy

Build once. Reuse everywhere. Deploy only when it matters.

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Author:

Jaspal Gundla