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Building an Tic Tac Toe App using Tornado and WebSockets

Tic Tac Toe

Tic-Tac-Toe game (https://en.wikipedia.org/wiki/Tic-tac-toe) is a classic two player game that I love playing with my kids.

I built this app using Python 3.5, but tested in Python 2.7 as well.

The Comamnd line version does not require any packages. The Web version requires Tornado 4 as specified in the requirements.txt

Command Line App (Play with Computer)

Run from your terminal -

python run_tic_tac_toe.py

To Test, run python board_games/test_tic_tac_toe.py

Two Player version over WebSockets

  1. Create a Virtual Environment - pyvenv venv. For Python2, install virtualenv venv

  2. Activate Virtual Environment - source venv/bin/activate. For Windows, you may need venv/scripts/activate.

  3. Install Requirments - pip install -r requirements.txt. This will install Tornado Web Framework.

  4. Run the App - python run_server.py

  5. Open two browser Tabs for http://localhost:9000 and Play the game.

Deploy Steps Performed on AWS Ubuntu 14.04 LTS EC2 Instance

Login to AWS Instance:

ssh -i <your AWS Pem key file> ubuntu@<aws ip>

Install Python / Git

# Update Ubuntu

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install libssl-dev openssl

# Install GIT
sudo apt-get install git

# Install Make
sudo apt-get install make


# Install Python 3
# Go to https://www.python.org/downloads/ and copy link to Python3

wget https://www.python.org/ftp/python/3.5.2/Python-3.5.2.tgz

tar zxvf Python-3.5.2.tgz
cd Python-3.5.2
./configure
make
sudo make install

# Now test to make sure python3 is installed.
python3 <enter>

# Once that's confirmed, we don't need the installers anymore.  We can delete them.
cd ..
rm Python-3.5.2.tgz
sudo rm -rf Python-3.5.2/

Run Tests

TODO

Download App Source Code:

# Go to home directory
cd ~

# Create Projects folder where we will clone our app
mkdir projects
cd projects

git clone https://github.com/sampathweb/board-games-app.git
cd board-games-app

# Create Virtual Environment
pyvenv venv
source venv/bin/activate

# Install required packages for the app
pip install -r requirements.txt

# Test by running the app at command line
python run_server.py (Confirm that App is running)

Run in Supervisor Process:

We want to serve the App under a Supervisor process so that we can Start / Stop and log errors in the app.

Let's install and configure Supervisor.

sudo apt-get install supervisor
sudo vi /etc/supervisor/conf.d/board-games-app.conf
<press i insert mode>


[program:board-games-app]
autostart = true
autorestart = true
command = /home/ubuntu/projects/board-games-app/venv/bin/python /home/ubuntu/projects/board-games-app/run_server.py --debug=False --port=80
numprocs = 1
startsecs = 10
stderr_logfile = /var/log/supervisor/board-games-app-err.log
stdout_logfile = /var/log/supervisor/board-games-app.log
environment = PYTHONPATH="/home/ubuntu/projects/board-games-app/venv/bin/"

<escape :wq>

sudo supervisorctl reload

# Verify that App is running under Supervisor.
# You may need to wait to few seconds for it go from Starting to Running

sudo supervisorctl status


<Your APP is live now>

Test the App

Open Browser: http://<AWS IP> (App is Live!)

Updating App

Each time you update the App via a git pull on your ubuntu instance, restart Supervisor to update the running app process.

sudo supervisorctl restart all  
# You could also just say - restart board-games-app if you have multiple apps running

# Check if the restart has been successful.
sudo supervisorctl status

The End