How to use Django with Apache and mod_wsgi
¶
Deploying Django with Apache and mod_wsgi is a tried and tested way to get Django into production.
mod_wsgi is an Apache module which can host any Python WSGI application, including Django. Django will work with any version of Apache which supports mod_wsgi.
The official mod_wsgi documentation is your source for all the details about how to use mod_wsgi. You’ll probably want to start with the installation and configuration documentation.
Basic configuration¶
Once you’ve got mod_wsgi installed and activated, edit your Apache server’s
httpd.conf file and add the following. If you are using a version of Apache
older than 2.4, replace Require all granted
with Allow from all
and
also add the line Order deny,allow
above it.
WSGIScriptAlias / /path/to/mysite.com/mysite/wsgi.py
WSGIPythonHome /path/to/venv
WSGIPythonPath /path/to/mysite.com
<Directory /path/to/mysite.com/mysite>
<Files wsgi.py>
Require all granted
</Files>
</Directory>
The first bit in the WSGIScriptAlias
line is the base URL path you want to
serve your application at (/
indicates the root url), and the second is the
location of a “WSGI file” – see below – on your system, usually inside of
your project package (mysite
in this example). This tells Apache to serve
any request below the given URL using the WSGI application defined in that
file.
If you install your project’s Python dependencies inside a virtualenv, add
the path to the virtualenv using WSGIPythonHome
. See the mod_wsgi
virtualenv guide for more details.
The WSGIPythonPath
line ensures that your project package is available for
import on the Python path; in other words, that import mysite
works.
The <Directory>
piece just ensures that Apache can access your
wsgi.py
file.
Next we’ll need to ensure this wsgi.py
with a WSGI application object
exists. As of Django version 1.4, startproject
will have created one
for you; otherwise, you’ll need to create it. See the WSGI overview
documentation for the default contents you
should put in this file, and what else you can add to it.
Warning
If multiple Django sites are run in a single mod_wsgi process, all of them will use the settings of whichever one happens to run first. This can be solved by changing:
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "{{ project_name }}.settings")
in wsgi.py
, to:
os.environ["DJANGO_SETTINGS_MODULE"] = "{{ project_name }}.settings"
or by using mod_wsgi daemon mode and ensuring that each site runs in its own daemon process.
Fixing UnicodeEncodeError
for file uploads
If you get a UnicodeEncodeError
when uploading files with file names
that contain non-ASCII characters, make sure Apache is configured to accept
non-ASCII file names:
export LANG='en_US.UTF-8'
export LC_ALL='en_US.UTF-8'
A common location to put this configuration is /etc/apache2/envvars
.
See the Files section of the Unicode reference guide for details.
Using mod_wsgi
daemon mode¶
“Daemon mode” is the recommended mode for running mod_wsgi (on non-Windows
platforms). To create the required daemon process group and delegate the
Django instance to run in it, you will need to add appropriate
WSGIDaemonProcess
and WSGIProcessGroup
directives. A further change
required to the above configuration if you use daemon mode is that you can’t
use WSGIPythonPath
; instead you should use the python-path
option to
WSGIDaemonProcess
, for example:
WSGIDaemonProcess example.com python-home=/path/to/venv python-path=/path/to/mysite.com
WSGIProcessGroup example.com
If you want to serve your project in a subdirectory
(https://example.com/mysite
in this example), you can add WSGIScriptAlias
to the configuration above:
WSGIScriptAlias /mysite /path/to/mysite.com/mysite/wsgi.py process-group=example.com
See the official mod_wsgi documentation for details on setting up daemon mode.
Serving files¶
Django doesn’t serve files itself; it leaves that job to whichever Web server you choose.
We recommend using a separate Web server – i.e., one that’s not also running Django – for serving media. Here are some good choices:
If, however, you have no option but to serve media files on the same Apache
VirtualHost
as Django, you can set up Apache to serve some URLs as
static media, and others using the mod_wsgi interface to Django.
This example sets up Django at the site root, but serves robots.txt
,
favicon.ico
, and anything in the /static/
and /media/
URL space as
a static file. All other URLs will be served using mod_wsgi:
Alias /robots.txt /path/to/mysite.com/static/robots.txt
Alias /favicon.ico /path/to/mysite.com/static/favicon.ico
Alias /media/ /path/to/mysite.com/media/
Alias /static/ /path/to/mysite.com/static/
<Directory /path/to/mysite.com/static>
Require all granted
</Directory>
<Directory /path/to/mysite.com/media>
Require all granted
</Directory>
WSGIScriptAlias / /path/to/mysite.com/mysite/wsgi.py
<Directory /path/to/mysite.com/mysite>
<Files wsgi.py>
Require all granted
</Files>
</Directory>
If you are using a version of Apache older than 2.4, replace
Require all granted
with Allow from all
and also add the line
Order deny,allow
above it.
Serving the admin files¶
When django.contrib.staticfiles
is in INSTALLED_APPS
, the
Django development server automatically serves the static files of the
admin app (and any other installed apps). This is however not the case when you
use any other server arrangement. You’re responsible for setting up Apache, or
whichever Web server you’re using, to serve the admin files.
The admin files live in (django/contrib/admin/static/admin
) of the
Django distribution.
We strongly recommend using django.contrib.staticfiles
to handle the
admin files (along with a Web server as outlined in the previous section; this
means using the collectstatic
management command to collect the
static files in STATIC_ROOT
, and then configuring your Web server to
serve STATIC_ROOT
at STATIC_URL
), but here are three
other approaches:
- Create a symbolic link to the admin static files from within your
document root (this may require
+FollowSymLinks
in your Apache configuration). - Use an
Alias
directive, as demonstrated above, to alias the appropriate URL (probablySTATIC_URL
+admin/
) to the actual location of the admin files. - Copy the admin static files so that they live within your Apache document root.
Authenticating against Django’s user database from Apache¶
Django provides a handler to allow Apache to authenticate users directly against Django’s authentication backends. See the mod_wsgi authentication documentation.