Online Judge Platform

screenshots

scaling replicas of the compiler based on the number of requests

Overview

The Online Judge Platform is a robust and scalable system designed for solving Data Structures and Algorithms (DSA) problems with an integrated code editor. Users can write, execute, and test their solutions in C++ and Python within a seamless environment. The platform is built with a three-tier architecture, ensuring efficiency, scalability, and fault tolerance.

Features

• 🏗 Three-Tier Architecture:

  • Frontend: User interface for problem-solving and code execution.
  • Backend Server: Manages user requests, problem sets, and results.
  • Compiler Service: no third party api for compiler , using compilers installed in a docker container.

• 🚀 Technology Stack:

  • Frontend: React.js + vite for an interactive UI.
  • Backend: Node.js with Express.js for API handling.
  • Database: MongoDB for storing problems, submissions, and user data.
  • Compiler Service: Secure execution using Dockerized environments.

• 🏗 Containerization & Orchestration:

  • Docker Containers for isolated and secure code execution.
  • Docker Compose for service management and dependency control.
  • Load Balancing for handling multiple requests efficiently.
  • Kubernetes HPA (Horizontal Pod Autoscaler) for automatic scaling based on demand.

• 🔥 Additional Features:

  • Real-time Execution Logs for user feedback.
  • Multiple Language Support (C++ & Python).
  • Secure Execution Environment using containerized compilers.
  • Scalability with Kubernetes ensuring high availability.

Installation & Setup

Prerequisites

• Docker & Docker Compose
• Kubernetes & kubectl
• Node.js & npm
• MongoDB/PostgreSQL

Steps to Run Locally

1. Clone the repository:

   git clone https://github.com/your-repo/online-judge.git
   cd online-judge

2. Start backend services using Docker Compose:

   docker-compose up --build

3. Deploy on Kubernetes:

   kubectl apply -f k8s/

4. Start frontend:

   cd frontend
   npm install
   npm start

5. Open the application in your browser at http://localhost:3000

Scaling & Deployment

• The platform supports Horizontal Scaling with Kubernetes HPA.
• Load balancing is managed via Kubernetes Services.
• Containers are optimized with resource limits and monitoring tools.

Contributing

Contributions are welcome! Feel free to submit issues or pull requests.

License

This project is licensed under the MIT License.

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🚀 Happy Coding!

online-judge-with-kubernetes