We will deploy our online code execution system in google cloud.

Tutorials in this Series

• Deploy our Online Code Executor in Google Cloud (this tutorial)
• Understanding the API of Judge0
• Creating an online code editor front-end

Youtube Demo

This is what we will be creating finally

Introduction

Judge0 is a robust, scalable, and open-source online code execution system that can be used to build a wide range of applications that need online code execution features. It is used in multiple competitive programming platforms, code editors, e-learning platforms.

We will deploy judge0 in google cloud for our online code execution.
Step 1: Create a project in google cloud and enable billing

Step 2: Create a VM instance from Compute Engine
Things to Note

1. You get $300 free credits when you open the account.
2. you have per-second billing, which is super awesome, pay as you use.

You can select default options and check for firewall HTTP and HTTPS for incoming traffic.

Step3: SSH to the terminal from the browser of the new VM

Step 4: Install Docker and Docker Compose in the VM

Follow this page for detailed instructions for self-hosting of judge-0

Install docker and docker-compose from the official page.

Make sure docker is running

sudo systemctl status docker

Make docker-compose is running

docker-compose --version

Download and extract release judge0 archive

wget https://github.com/judge0/judge0/releases/download/v1.12.0/judge0-v1.12.0.zip
unzip judge0-v1.12.0.zip

Run all services and wait a few seconds until everything is initialized

cd judge0-v1.12.0
sudo docker-compose up -d db redis
sleep 10s
sudo docker-compose up -d
sleep 5s

Resizing Disk space

You might get an error no space left on the device

You need to go to the Manage disk page, edit and increase the disk size

Stop and start the VM again, so that resize works properly.

Run the last command again

sudo docker-compose up -d

If everything goes well, you will see this screen.

Your instance of Judge0 v1.12.0 is now available at http://<IP ADDRESS OF YOUR SERVER>

If you open http://34.72.83.62/dummy-client.html and execute a sample code.
Judge0 Dummy Client

We will deep dive into the API and create front-end in upcoming tutorials

Tutorials in this Series

1. Deploy our Online Code Executor in Google Cloud (this tutorial)
2. Understanding the API of Judge0
3. Creating an online code editor front-end