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NodeJS Microservices

Tech

  • NodeJS
  • Express
  • MongoDB/Mongoose
  • Bcryptjs
  • Winston
  • RabbitMQ
  • Nginx
  • Docker

System Architecture

microservices acrchitucre

Overview

Online shop app that's divided into 3 microservices.

Authentication and Authorization

  • Users are authenticated using JWTs, where a token is created when a customer logs-in with valid credentials. Passwords are also encrypted using Bcrypt.
  • Authorization is managed using a middleware with the following role:
    • Logged-in customer:
      • This permission allows customer to interact with Product and Shopping services.

Customer Service

  • This service responsible of the main customer operations.
    • Authentication
      • Customers can signup and login through this service.
    • Retrieve customer actions that's passed from other services.
      • Profile
      • Whishlist
      • Cart
      • Orders

Product Service

  • This service is responsible of the Product operations.
    • Create new products.
    • View products by category.
    • View products in details.
    • Customer realted operations.
      • Add/Remove products to whishlist.
      • Add/Remove products to cart.
      • Communicate with the customer service to update .whishlist and cart state.

Currently, any logged-in customer can create products but additional permession should be added to authorize this endpoint.

Shopping Service

  • This service is responsible of the order operations.
    • Create order.
      • Communicate with the customer service to get the current cart.
      • Create order based on current cart data.
    • Communicate with the customer serviceto update the current order details.

Reverse Proxy

  • Nginx is used as a reverse proxy to send requests to each microservice. It routes incoming requests from /servicename the service's port servicename:port.

Communication

  • Microservices commuincates with each other using RabbitMQ via publisher and subscriber.
  • Each microservice is deployed into a docker container.

Docker

  • Each service has a Docker image. All images are deployed into containers managed through the docker-compose file, which contains MongoDB and RabbitMQ.

How to run the app

  • Make sure to add a .env file to each serive folder, you can check the .env_template file for a reference.
  • You can spin up all services used by running/building the docker-compose file:
    docker-compose up --build

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