Install dependencies

sudo apt install build-essential texlive-latex-base openjdk-8-jdk-headless fp-compiler \
                 postgresql postgresql-contrib postgresql-client python3 python3-dev python3-pip \
                 cppreference-doc-en-html cgroup-lite wget curl llvm make tk-dev xz-utils zip \
                 libbz2-dev libcap-dev libcups2-dev libffi-dev libncursesw5-dev libpq-dev \
                 libreadline-dev libsqlite3-dev libssl-dev libxml2-dev libxmlsec1-dev libyaml-dev liblzma-dev zlib1g-dev

Install pyenv:

curl https://pyenv.run | bash

You may need to enable memory cgroup: https://github.com/canonical/microk8s/issues/1691#issuecomment-1279774327

Download CMS

cd ~
git clone --recursive https://github.com/ioi-2023/cms.git

Preparation

In order to run CMS, there are some preparation steps to run (like installing the sandbox, compiling localization files, creating the cmsuser group, and so on).

cd ~/cms
sudo python3 prerequisites.py install

Installing CMS and its Python dependencies

We'll install CMS in a virtual environment created by pyenv.

pyenv install 3.8.18
pyenv virtualenv 3.8.18 cms
pyenv local cms

pip install --upgrade pip setuptools wheel
pip install -r requirements.txt
python setup.py install

We also need to fix pycryptodomex:

2to3 -wWn --no-diffs ~/.pyenv/versions/cms/lib/python3.8/site-packages/Cryptodome

Configure the DB

We first need to start PostgreSQL:

sudo service postgresql start

The next thing to do is to create the user and the database. You need to log in as the postgres user first:

sudo su - postgres

Then, to create the user (which does not need to be a superuser, nor be able to create databases nor roles) and the database, run the following commands:

createuser --username=postgres --pwprompt cmsuser
createdb --username=postgres --owner=cmsuser cmsdb
psql --username=postgres --dbname=cmsdb --command='ALTER SCHEMA public OWNER TO cmsuser'
psql --username=postgres --dbname=cmsdb --command='GRANT SELECT ON pg_largeobject TO cmsuser'

The last two lines are required to give the PostgreSQL user some privileges which it does not have by default, despite being the database owner.

Enter exit to log out.

Configure CMS

Open /usr/local/etc/cms.conf and change the connection string given in database. This means to change username, password, and database with the ones you chose before.

Finally, you have to create the database schema for CMS:

cd ~/cms
cmsInitDB

Running CMS

Run WSLHostPatcher to make WSL2 listen for incoming connection on any interfaces (by default it only listens on localhost).

You need to create an admin user. This only needs to be done once:

cmsAddAdmin -p PASSWORD USERNAME

Start LogService:

cmsLogService

Start cmsAdminWebServer:

cmsAdminWebServer

Log in to the admin interface and create some contests. Now we can start all CMS services:

cmsResourceService -a