NodeJS Microservices

Tech

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

System Architecture

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