Flask Deployment Simple Example

app.py

# File /var/www/wsgi_app/app.py

# The Flask application


#!/usr/bin/env python
from flask import Flask

app = Flask(__name__)

@app.route('/')	
def index():
	return ('Hello, world')

# Not used in apache, so it doesn't matter
if __name__ == '__main__':
	app.run(host=None, port=None, debug=True)

gistfile1.txt

Instructions:

1. Added the three files below to the right places.

2. Disable the default site, otherwise the WSGI app won't be shown for some reason. 
   This one took me a LONG time to figure out.

# The default file under Debian/Ubuntu
>sudo a2dissite 000-default.conf

3. Enable the WSGI project.
>sudo a2ensite wsgi_example

wsgi.py

# File /var/www/wsgi_app/wsgi.py

# The WSGI file used by Apache to run your Flask app

import logging, sys
# Logging, in case something goes wrong. Found in /var/log/apache2/error.log, specificed in the conf file above.
# /var/log/apache2 is the default global variable.
logging.basicConfig(stream=sys.stderr)

from app import app as application

wsgi_example.conf

# File: /etc/apache2/sites-available/wsgi_example.conf

# The Apache configuration

# The apache config file found in /etc/apache2/sites-available/ in Debian/Ubuntu
# Note that this is in sites-available not sites-enabled. Sites-enabled only contains a symlink to sites-available and may be enabled/disabled with a2dissite

<VirtualHost *:80>

# Where the project is served and the physical wsgi file location
WSGIScriptAlias / /var/www/wsgi_app/wsgi.py

# The daemon process and the options https://code.google.com/p/modwsgi/wiki/ConfigurationDirectives#WSGIDaemonProcess
# Here I've added /var/www/wsgi_app to the python path so wsgi can
# import it when running. Otherwise you could do it in the wsgi.py file like so
# import sys
# sys.path.insert(0, '/path/to/the/application')

WSGIDaemonProcess example python-path=/var/www/wsgi_app/ threads=25 processes=2

# The name of the process group (?)
WSGIProcessGroup example

<Directory /var/www/wsgi_app>
Order deny,allow
Allow from all
</Directory>

# Should add a static directory here


# The logs are found in /var/log/apache2 under Debian/Ubuntu
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined

</VirtualHost>