Configure Python flask application with apache and mod_wsgi in linux

Question

I have a linux apache 2.4.12 and mod_wsgi 4.5.2 (mod_wsgi.so installed into apache) under application account. Apache runs under port 8050 under application account. Following this link to test mod_wsgi working: http://modwsgi.readthedocs.org/en/develop/user-guides/quick-configuration-guide.html#wsgi-application-script-file and I entered my URL: http://mytest.mydomain.com:8050/myapp . It displayed "Hello World", so it indicated my mod_wsgi installation working. Next I tried to see if I can make flask application work.

I created the simple hello.py file under /home/myuserId/wsgi:

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
   return 'Hello World!'

if __name__ == '__main__':
   app.run()

then I created a simple wsgi file as:

import sys, os
sys.path.insert(0, "/home/myuserId/wsgi")

from hello import app as application

then I followed others suggestions including this http://flask.pocoo.org/docs/0.10/deploying/mod_wsgi/ to configure my apache http.conf file with virtualhost as:

<VirtualHost *:8050>

  # ServerName www.example.com

  WSGIDaemonProcess hello user=appuser group=appuser threads=5
  WSGIScriptAlias / /home/myuserId/wsgi/hello.wsgi

 <Directory /home/myuserId/wsgi>
    WSGIProcessGroup hello
    WSGIApplicationGroup %{GLOBAL}
    Require all granted
    Options +ExecCGI
    AddHandler wsgi-script .wsgi
 </Directory>
</VirtualHost>

I saved the httpd.conf file and restarted the apache w/o error. When I entered the URL in chrome: http://mytest.mydomain.com:8050/hello or http://mytest.mydomain.com:8050/hello_world , I got this error:

**Not Found**

The requested URL /hello was not found on this server.
Apache/2.4.12 (Unix) mod_wsgi/4.5.2 Python/2.7.9 Server at mytest.mydomain.com port 8050. 

My questions are:

1. is my configuration wrong?
2. what is the right URL for the above hello flask application to use?
3. tried WSGIScriptAlias /hello /home/myuserId/wsgi/hello.wsgi to mount hello application but not found either.
4. for flask app, why does conf file have to conf the app in VirtualHost?

Answer 1

You aren't specifying ServerName directive with host name. As a result it will not match that VirtualHost and will instead fallback to whatever the first VirtualHost was that it found in the Apache configuration files.