Online Judge Deploy Setting

Main modules are available below:

• Backend(Django): https://github.com/dAiv-CNU/OnlineJudge
• Frontend(Vue): https://github.com/dAiv-CNU/OnlineJudgeFE
• Judger Sandbox(Seccomp): https://github.com/dAiv-CNU/Judger
• JudgeServer(A wrapper for Judger): https://github.com/dAiv-CNU/JudgeServer

Environmental preparation (Linux)

• System: Ubuntu 18.04 LTS

1. Install the necessary dependencies

   sudo apt-get update
   sudo apt-get install -y vim python3-pip curl git
   sudo pip3 install --upgrade pip
   sudo pip3 install docker-compose

2. Install Docker

   Install using script: sudo curl -sSL get.docker.com | sh

   Other installation methods: https://docs.docker.com/install/

Install

1. Please select a location with some surplus disk space and run the following command:

   git clone -b 2.0 https://github.com/dAiv-CNU/OnlineJudgeDeploy.git deploy
   sudo ln -rs deploy ./Desktop/deploy
   cd deploy

2. Build custom docker images (if needed)

   git clone https://github.com/dAiv-CNU/OnlineJudge.git backend
   sudo docker buildx build ./backend -t oj-image/backend --load

3. Start service containers

   sudo docker compose up -d

4. Check status

   sudo docker ps -a

According to the network speed, the setup can be completed automatically in about 5 to 30 minutes without manual intervention.

Wait for the command execution to complete, and then run docker ps -a. When you see that the status of all the containers does not have unhealthy or Exited (x) xxx, it means OnlineJudge has started successfully.

Access the server's HTTP 80 port or HTTPS 443 port through a browser, and you can start using it. The background management path is /admin, the super administrator user name automatically added during the installation process is root, and the password is rootroot. If you log in successfully, please change your account password immediately..

Don't forget to read the documentation: http://opensource.qduoj.com/

Build Nginx

1. Download the Nginx installation package

   • Please use nginx latest version: http://nginx.org/en/download.html
   • & use headers-more-nginx-module compatible version

   wget 'http://nginx.org/download/nginx-1.22.1.tar.gz'
   tar -xzvf nginx-1.22.1.tar.gz
   rm *.tar.gz
   cd nginx-1.22.1

   wget 'https://github.com/openresty/headers-more-nginx-module/archive/refs/tags/v0.37.tar.gz'
   tar -xzvf v0.37.tar.gz

2. Build and Install

   sudo apt-get install -y libpcre3 libpcre3-dev zlib1g-dev openssl libssl-dev
   ./configure --prefix=/usr/local/nginx --with-http_ssl_module --with-http_v2_module --add-module=./headers-more-nginx-module-0.37
   make
   sudo make install
   /usr/local/nginx/sbin/nginx -V
   sudo ln -s /etc/nginx/nginx.conf /usr/local/nginx/conf/nginx.conf
   sudo ln -s /usr/local/nginx/sbin/nginx /sbin/nginx

3. Clean up build files

   cd ..
   rm -rf nginx-1.22.1

SSL Configuration

1. Install Certbot

   sudo apt-get install letsencrypt -y

2. Shutdown Global/Docker System Nginx

   sudo service nginx stop
   sudo docker compose down

3. Obtain SSL Certificate

   sudo certbot certonly --standalone -d daiv.ddns.net
   sudo cat /etc/letsencrypt/live/daiv.ddns.net/fullchain.pem

4. Add SSL Settings to Nginx Config

   sudo cp ./nginx/default /etc/nginx/sites-available/default

5. Restart Nginx

   sudo nginx -t
   sudo service nginx restart
   sudo docker compose up -d

6. Add a scheduled task to renew the certificate

   sudo chmod +x cert_renew.sh
   sudo crontab -e

   • add the following line to the file

   30 4 * * 0 /home/daiv/deploy/cert_renew.sh
   

   • restart cron service

   sudo service cron start

Uninstall

1. Stop service containers

   sudo docker compose down

2. Delete all docker containers and images

   sudo docker stop $(sudo docker ps -a -q)
   sudo docker rm $(sudo docker ps -a -q)
   sudo docker rmi $(sudo docker images -q)