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115 lines
4.4 KiB
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115 lines
4.4 KiB
Plaintext
============================
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How to use Django with uWSGI
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============================
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.. highlight:: bash
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uWSGI_ is a fast, self-healing and developer/sysadmin-friendly application
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container server coded in pure C.
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.. _uWSGI: http://projects.unbit.it/uwsgi/
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.. seealso::
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The uWSGI docs offer a `tutorial`_ covering Django, nginx, and uWSGI (one
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possible deployment setup of many). The docs below are focused on how to
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integrate Django with uWSGI.
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.. _tutorial: https://uwsgi.readthedocs.org/en/latest/tutorials/Django_and_nginx.html
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Prerequisite: uWSGI
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===================
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The uWSGI wiki describes several `installation procedures`_. Using pip, the
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Python package manager, you can install any uWSGI version with a single
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command. For example:
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.. code-block:: bash
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# Install current stable version.
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$ sudo pip install uwsgi
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# Or install LTS (long term support).
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$ sudo pip install http://projects.unbit.it/downloads/uwsgi-lts.tar.gz
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.. _installation procedures: http://uwsgi-docs.readthedocs.org/en/latest/Install.html
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.. warning::
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Some distributions, including Debian and Ubuntu, ship an outdated version
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of uWSGI that does not conform to the WSGI specification. Versions prior to
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1.2.6 do not call ``close`` on the response object after handling a
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request. In those cases the :data:`~django.core.signals.request_finished`
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signal isn't sent. This can result in idle connections to database and
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memcache servers.
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uWSGI model
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-----------
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uWSGI operates on a client-server model. Your Web server (e.g., nginx, Apache)
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communicates with a django-uwsgi "worker" process to serve dynamic content.
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See uWSGI's `background documentation`_ for more detail.
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.. _background documentation: http://projects.unbit.it/uwsgi/wiki/Background
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Configuring and starting the uWSGI server for Django
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----------------------------------------------------
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uWSGI supports multiple ways to configure the process. See uWSGI's
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`configuration documentation`_ and `examples`_
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.. _configuration documentation: https://uwsgi.readthedocs.org/en/latest/Configuration.html
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.. _examples: http://projects.unbit.it/uwsgi/wiki/Example
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Here's an example command to start a uWSGI server::
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uwsgi --chdir=/path/to/your/project \
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--module=mysite.wsgi:application \
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--env DJANGO_SETTINGS_MODULE=mysite.settings \
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--master --pidfile=/tmp/project-master.pid \
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--socket=127.0.0.1:49152 \ # can also be a file
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--processes=5 \ # number of worker processes
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--uid=1000 --gid=2000 \ # if root, uwsgi can drop privileges
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--harakiri=20 \ # respawn processes taking more than 20 seconds
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--max-requests=5000 \ # respawn processes after serving 5000 requests
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--vacuum \ # clear environment on exit
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--home=/path/to/virtual/env \ # optional path to a virtualenv
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--daemonize=/var/log/uwsgi/yourproject.log # background the process
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This assumes you have a top-level project package named ``mysite``, and
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within it a module :file:`mysite/wsgi.py` that contains a WSGI ``application``
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object. This is the layout you'll have if you ran ``django-admin.py
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startproject mysite`` (using your own project name in place of ``mysite``) with
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a recent version of Django. If this file doesn't exist, you'll need to create
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it. See the :doc:`/howto/deployment/wsgi/index` documentation for the default
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contents you should put in this file and what else you can add to it.
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The Django-specific options here are:
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* ``chdir``: The path to the directory that needs to be on Python's import
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path -- i.e., the directory containing the ``mysite`` package.
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* ``module``: The WSGI module to use -- probably the ``mysite.wsgi`` module
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that :djadmin:`startproject` creates.
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* ``env``: Should probably contain at least ``DJANGO_SETTINGS_MODULE``.
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* ``home``: Optional path to your project virtualenv.
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Example ini configuration file::
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[uwsgi]
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chdir=/path/to/your/project
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module=mysite.wsgi:application
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master=True
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pidfile=/tmp/project-master.pid
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vacuum=True
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max-requests=5000
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daemonize=/var/log/uwsgi/yourproject.log
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Example ini configuration file usage::
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uwsgi --ini uwsgi.ini
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See the uWSGI docs on `managing the uWSGI process`_ for information on
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starting, stopping and reloading the uWSGI workers.
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.. _managing the uWSGI process: http://uwsgi-docs.readthedocs.org/en/latest/Management.html
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