Microservices with NestJS & RabbitMQ

Getting Started

Prerequisites

• Node.js v20+
• NestJS v10+
• npm
• Docker & Docker Compose
• Git

Installation

1. Clone the repository:

   git clone <repo-url>
   cd MicroservicesArchitecture-NestJS-RabbitMQ

2. Run with Docker Compose docker compose up --build

3. To stop the Services docker compose down

Notes

• All inter-service communication (token validation, user events) is handled via RabbitMQ.
• For development, use npm run start:dev inside each service for hot-reloading.
• Adjust .env files as needed for your environment.

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Demonstration

A demonstration of a microservices architecture using NestJS and RabbitMQ for inter-service communication between an Auth Service and a Product Service.

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Table of Contents

• Features
• Services
• Architecture
• Technology Stack
• Getting Started
• API Documentation

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Features

• User authentication (registration, login, logout)
• JWT token management (access & refresh tokens)
• Product catalog management (CRUD operations)
• Service-to-service authentication via RabbitMQ RPC
• Event-driven architecture with RabbitMQ Pub/Sub
• Containerized with Docker
• Comprehensive API documentation with Swagger

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Services

Auth

• Handles user authentication and authorization
• Manages JWT tokens (access & refresh)
• Provides RPC endpoints for token validation
• Publishes user events to RabbitMQ
• Check if Service Started: http://localhost:3001/
• Swagger UI: http://localhost:3000/api

Product

• Manages product catalog with owner-based permissions
• Consumes Auth Service via RabbitMQ RPC
• Subscribes to user events (e.g., logs when a user registers)
• Check if Service Started: http://localhost:3001/
• Swagger UI: http://localhost:3001/api

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Architecture

• REST APIs for external communication
• RabbitMQ for internal service communication (Pub/Sub and RPC)
• MongoDB for data persistence
• Docker for containerization

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Technology Stack

• Backend Framework: NestJS
• Message Broker: RabbitMQ
• Database: MongoDB
• ORM: Typegoose
• Containerization: Docker
• API Documentation: Swagger/OpenAPI

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