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How to install Python with mod_wsgi on a CentOS 5 or 6 VPS or Server with cPanel  Print this Article

How To Install Python 2.7 with mod_wsgi on CentOS 5 or 6 with cPanel

The world knows that cPanel/WHM is not too Django, or python friendly. However, this is a step by step tutorial which will help you install Python 2.7 with mod_wsgi onto CentOS 5 or 6 and cPanel so that you can begin Python development on a cPanel/WHM VPS or server. All of our Shared and Reseller plans come with a Django/Python friendly hosting environment.

This tutorial has been updated on 8/19/13.

Prerequisites:

CentOS 5/6 32 or 64 bit with root access

cPanel


Note: We are not using cPanel custom modules guide because it only works with built-in Python 2.6.

 

Creating Python folder

mkdir /usr/src/python2.7

cd /usr/src/python2.7 


If required by your project, you can install SQLite by using WHM's built in 'Easy Apache' script and selecting 'MySQLI' on the 'exhaustive list' or options. 

Installing Python 2.7 into alternate location since we don't want to break Centos 5/6 (yum) that uses Python 2.4
mkdir /usr/src/python2.7
cd /usr/src/python2.7/
wget http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tgz
tar zxvf Python-2.7.5.tgz
cd Python-2.7.5
./configure --prefix=/opt/python2.7 --with-threads --enable-shared
make
make install

Creating symbolic link to the alternate Python version
ln -s /opt/python2.7/bin/python /usr/bin/python2.7
echo '/opt/python2.7/lib'>> /etc/ld.so.conf.d/opt-python2.7.conf
ldconfig

Let's test if new Python version works
/usr/bin/python2.7

If successful you will see something like this:
Python 2.7.2 (default, Sep 3 2011, 18:28:42)[GCC 4.1.2 20080704 (Red Hat 4.1.2-50)] on linux2

press control+D to exit

Now we need to install Python setup-tools
cd /usr/src/python2.7/
wget http://pypi.python.org/packages/2.7/s/setuptools/setuptools-0.6c11-py2.7.egg
sh setuptools-0.6c11-py2.7.egg --prefix=/opt/python2.7

Installing virtualenv to our Python 2.7
cd /opt/python2.7/bin/
./easy_install virtualenv

Installing mod_wsgi (this module will work only with python 2.7)
cd /opt/python2.7/lib/python2.7/config/
ln -s ../../libpython2.7.so
cd /usr/src/python2.7/
wget http://modwsgi.googlecode.com/files/mod_wsgi-3.3.tar.gz
tar zxvf mod_wsgi-3.3.tar.gz
cd mod_wsgi-3.3
./configure --with-python=/opt/python2.7/bin/python
make
make install

We need to avoid cPanel's easy_apache clearing up /usr/local/apache/modules folder
mkdir /usr/local/apache/extramodules
mv /usr/local/apache/modules/mod_wsgi.so /usr/local/apache/extramodules/

Include mod_wsgi into Apache configuration
nano /usr/local/apache/conf/includes/pre_virtualhost_global.conf

paste:
LoadModule wsgi_module /usr/local/apache/extramodules/mod_wsgi.so
AddHandler wsgi-script .wsgi

Before we restart Apache, lets test if we have the correct configuration
service httpd configtest

You should get this answer:
Syntax OK

Now restart Apache
/scripts/restartsrv httpd


Python 2.7 with mod_wsgi is now installed on your cPanel server.

You can create a test.wsgi file to test Python scripts
def application(environ, start_response):
"""Simplest possible application object"""
output = "Hello World"
status = '200 OK'
response_headers = [('Content-type', 'text/plain'),
('Content-Length', str(len(output)))]
start_response(status, response_headers)
return [output]

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