DevOps Assignment – Node.js, MongoDB, Redis with Docker Compose

Overview

This project demonstrates containerizing a Node.js application and orchestrating multiple services using Docker Compose. The application interacts with MongoDB for persistent storage and Redis for caching.

Architecture

Client → Node.js API → MongoDB
↘ Redis Cache

Services are containerized and managed using Docker Compose.

Services Used

• Node.js – REST API service
• MongoDB – Database for storing data
• Redis – Caching layer
• Docker – Containerization
• Docker Compose – Multi-container orchestration

Project Structure

devops-assignment │ ├── app │ ├── server.js │ ├── package.json │ ├── Dockerfile ├── docker-compose.yml ├── .env └── README.md

Environment Variables

Defined in .env PORT=3000 MONGO_URI=mongodb://mongo:27017/devopsdb REDIS_HOST=redis

Create environment variables

cp .env.example .env

Running the Application

Clone the repository and run:

docker-compose up --build

This will start three containers:

• Node.js Application
• MongoDB
• Redis

Access the Application

http://localhost:3001/data

(or replace localhost with your EC2 public IP)

API Endpoints

Store Data

POST /data

Example request: curl -X POST http://localhost:3001/data

-H "Content-Type: application/json" -d '{"name":"Ashish"}'

Retrieve Data

GET /data

curl http://localhost:3001/data

The API first checks Redis cache before retrieving data from MongoDB.

Features Implemented

• Containerized Node.js application
• Multi-container setup using Docker Compose
• MongoDB persistent storage
• Redis caching
• Environment variable configuration
• Service communication via Docker network

Author

Ashish Thakur