Introduction

In this post, we’ll explore how to build scalable microservices using Node.js and modern cloud technologies.

Architecture Overview

Here’s a basic example of a microservice setup:

// User Service
import express from 'express';
import mongoose from 'mongoose';

const app = express();

// Database connection
mongoose.connect('mongodb://localhost/users');

// User model
const User = mongoose.model('User', {
  name: String,
  email: String,
  role: String
});

// API endpoints
app.get('/users', async (req, res) => {
  const users = await User.find();
  res.json(users);
});

app.listen(3000, () => {
  console.log('User service running on port 3000');
});

Docker Configuration

Here’s how we containerize our service:

FROM node:18-alpine

WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .

EXPOSE 3000
CMD ["npm", "start"]

Load Testing Results

Load testing results showing response times under different loads

Video Tutorial

Key Learnings

1. Always implement proper error handling
2. Use circuit breakers for service communication
3. Implement proper monitoring and logging
4. Design with scalability in mind