How to Build a Microservices Architecture with NodeJS

Microservices architecture allows us to break down complex applications into smaller, independently deployable services. Node.js, with its non-blocking I/O and event-driven nature, is an excellent choice for building microservices.

Microservices architecture can involve designing the application as a collection of loosely coupled services. Each service is independent, deployable, and communicates over the network. This article will guide you through creating a microservices architecture using NodeJS.

Prerequisites

• Node.js and JavaScript
• RESTful APIs.
• SQL/NOSQL

Approach

We can build the microservices architecture with NodeJS. We will create a basic microservice architecture for Users. where we can create and access the list of users. we are going to do this all:

• Identify and define the individual services.
• Set up the environment for the each services
• Implement the each service independently.
• Set up the API Gateway to route the requests to the appropriate services.
• Ensure communication between the services using REST APIs.

Steps to Build Microservices Architecture with NodeJS

We will create the user-service that will show the small architecture of user management. where we can create a user and that will store in the mongodb database and we can access all the users.

Step 1: Initialize the Project

We can initialize the project using below command.

mkdir user-service
cd user-service
npm init -y

Step 2: Install the Required Dependencies

The user service required dependencies are express, mongoose and body-parser of the application. Use the following command

npm install express mongoose body-parser

Project Structure

Updated dependencies

"dependencies": {
 "express": "^4.19.2",
 "mongoose": "^8.4.4"
 }

Example: Create the files for the schema and the controller functions.

Run the application using the following command

npm run start 

Step 3: Testing the user-service

• Create the User
• Method: POST
• paste the URL in the postman

 http://localhost:3000/users

Output

• Get All the Users
• Method: GET
• paste the URL in the postman

http://localhost:300/users

Output: