Titanium-Silver

Description

Titanium-Silver is a python package for automating lab evalution using dockers.

Built an online judge for source code evaluation where user submits source code and receives results such as execution time, memory usage and number of passed testcases.
Each user program is run in a docker container with limited memory and processing power. The number of active containers are configurable to guarantee no server crashes. Each container is spawned on a different thread to improve efficiency.
The server is developed using Flask and deployed using Gunicorn. Nginx is used as reverse proxy. Nginx takes care of load balancing.
Tests are written using pytest and continuous integration using Travis.
Results:
- 50 simultaneous requests: 27.18 seconds
- 100 simultaneous requests: 50.18 seconds
- 10 requests with 5 seconds interval, 5 times (Realistic scenario designed and tuned for): 27.64 seconds
- Above result translates to 0.55 seconds per request with average waiting time for requests being 0.528 seconds.

Installation

This package requires:

docker-ce (Install Guide)
python 3

Please verify docker's installation:

$ sudo docker run hello-world

Install Required Packages:

$ sudo pip3 install -r requirements.txt

Install Titanium-Silver:

$ sudo pip3 install -e . # PWD must be main folder with setup.py

Development:

Steps:

Install nvm to install node and npm:

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash
source ~/.bashrc
nvm install node
cd <project_root>/frontend
npm install
<in one shell> $ npm run start
<in another shell> $ ./run.sh

Production:

Steps:

Do these:

$ cd frontend/ && npm run build
$ cd server/flaskr/ 
$ ln -s ../../frontend/build/static static
$ ln -s ../../frontend/build/ templates

Open the file index.html in frontend/build. For each <script> tag, add this: type="text/babel"
Remove the <link> for manifest.json
For favicon.ico to load do this:
1. Move favicon.ico to build/static.
2. Change href of <link> to : {{url_for("static",filename="./favicon.ico")}}

Tests

$ pytest # Very Intensive, Less verbose
$ # Recommended:
$ sudo pytest tests/test_basic.py
$ sudo pytest tests/test_basic_100.py
$ sudo pytest tests/test_basic_50.py
$ sudo pytest tests/test_server_simulation.py

Usage

Docker module usage:

usage: script.py [-h] [-n [NUM]] [-s [SLEEP]]

optional arguments:
  -h, --help  show this help message and exit
  -n [NUM]    Number of containers=(0,50]
  -s [SLEEP]  Sleep duration of client file

# or as package:

>>> from titanium_silver.docker_client import Docker_Client
>>> dcli = Docker_Client()
>>> t = dcli.spawn_process(name='prototype%d'%i, num=i, sleep=5000, path=os.getcwd()+'/tests/SC') # returns a thread with container
>>> t.result_queue.get().decode('utf-8') # Get result

ganesh-k13/titanium-silver