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Upgrading It All. Getting Python and Django Running in a Virtual Environment on CentOS 6, part 2


If you’ve read up on Part 1, you should have a running virtual environment with the latest Django installation and Python 2.7 installed. My next task was to get Apache with Mod_WSGI running correctly in order to host my Overview app. After hours and days of tinkering, I finally got it working and here are my notes for record keeping.

As the Django docs mention, the Mod_WSGI docs are very helpful in configuring and troubleshooting your installation of Mod_WSGI. Here’s what I did to get it running.

[leo@overview Downloads]# wget https://github.com/GrahamDumpleton/mod_wsgi/archive/4.4.11.tar.gz
[leo@overview Downloads]# tar xf 4.4.11.tar.gz
[leo@overview Downloads]# cd mod_wsgi-4.4.11
[leo@overview mod_wsgi-4.4.11]# ./configure --with-python=/usr/local/bin/python2.7
[leo@overview mod_wsgi-4.4.11]# LD_RUN_PATH=/usr/local/lib make
[leo@overview mod_wsgi-4.4.11]# make install

Here, I am downloading and installing the latest Mod_WSGI. You can see in the configure command that I chose to specify the python to use. A mistake I made in this process is to use the virtual environment python instead of the path directly to the python2.7 installation. After reading Some tips for setting up Apache and mod_wsgi by Marc Abramowitz, I decided to also use LD_RUN_PATH in my make command.

Last, we have to load the mod_wsgi module into apache. Adding this line to the httpd.conf file made it so.

LoadModule wsgi_module modules/mod_wsgi.so

After restarting Apache, I can now see that Mod_WSGI is running by taking a look at the httpd error logs.

Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips mod_wsgi/4.4.11 Python/2.7.5 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations

My apache config file has come down to the following:

<VirtualHost *:80>
  ServerName Overview
  ServerAlias overview.labs.lenovo.com/SRM
  Alias /static /home/Django/Overview/rsl/static/
  Alias /uploads /home/Django/Overview/static/uploads/

  <Directory /var/www/html/Overview/static>
    Order deny,allow
    Allow from all

  <Directory /home/Django/Overview/rsl/static/uploads>
    Order deny,allow
    Allow from all

  WSGIDaemonProcess Overview python-path=/home/Django/Overview:/home/virtualenvs/django_env/lib/python2.7/site-packages
  WSGIScriptAlias /SRM /home/Django/Overview/Overview/wsgi.py process-group=Overview

  <Directory /home/Django/Overview/Overview>
    <Files wsgi.py>
      Order deny,allow
      Allow from all


And my wsgi.py file is:

import os, sys


from django.core.wsgi import get_wsgi_application

os.environ["DJANGO_SETTINGS_MODULE"] = "Overview.settings"

application = get_wsgi_application()

If you are running into issues with your Mod_WSGI installation with the use of virtual environments, I suggest you take a look at the documentation here.

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