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@simoncoulton
Created May 7, 2012 04:39
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Setting up Nginx, uWSGI & Python3
======================================
Setting up Nginx, uWSGI and Python3
======================================
First off, I'm traditionally a PHP developer, but am looking at moving across to Python. I really struggled to find decent documentation on how to get a server up and running for deploying Python web applications from the point of view of someone coming from PHP. The main problems I came across with documentation were:
1) Only showed you how to run the server for a single web application.
2) Only showed you how to configure the app, not the server it was running on.
My preferred workflow for development is by setting up a new VM in VMware Fusion and then forwarding through all requests to that VM via /etc/hosts. This might not be the optimal way to get things up and running, but it works for me.
SITE_URL refers to the primary domain for the site.
SITE_DIR refers to the location on disk that the site is located.
Typical folder structure of an app looks something like:
root
app # site code goes in here
config
data
cache
log
libs
vendors # frameworks and 3rd party libraries go in here
public
css
img
js
---------------------------------------
Installing required tools
---------------------------------------
We'll start by installing the required tools via apt-get.
apt-get install uwsgi uwsgi-plugin-python3 nginx-full python-setuptools python-pip
---------------------------------------
Creating the uWSGI upstart
---------------------------------------
Next we need to create the upstart that will be used start the uWSGI service.
vi /etc/init/uwsgi.conf
# uWSGI - Manage uWSGI Application Server
description "uWSGI Emperor Mode"
start on (filesystem and net-device-up IFACE=lo)
stop on runlevel [!2345]
respawn
exec /usr/bin/uwsgi --emperor /etc/uwsgi/vassals/sites-enabled/ --logto /var/log/uwsgi.log
initctl reload-configuration
update-alternatives --set uwsgi /usr/bin/uwsgi_python32
---------------------------------------
Creating the site configuration file for nginx
---------------------------------------
Create the configuration file for the site in the sites-available folder:
vi /etc/nginx/sites-available/SITE_URL
And then use the following to configure the site:
upstream wsgicluster {
server unix://tmp/SITE_URL.sock
}
server {
listen 80;
server_name SITE_URL;
error_log SITE_DIR/data/log/error.log;
access_log SITE_DIR/data/log/access.log;
location / {
include uwsgi_params;
uwsgi_pass wsgicluster;
}
location -^/(img|js|css)/ {
root SITE_DIR/public;
expires 30d;
}
location = /favicon.ico {
log_not_found off;
}
}
Then finally we link the sites-available configuration file to the sites-enabled:
ln -s /etc/nginx/sites-available/SITE_URL /etc/nginx/sites-enabled/SITE_URL
---------------------------------------
Creating the vassal for uWSGI emperor
---------------------------------------
Create the folders for sites-available and sites-enabled:
mkdir /etc/uwsgi/sites-available
mkdir /etc/uwsgi/sites-enabled
Create the configuration vassal file:
vi /etc/uwsgi/sites-available/SITE_URL.yml
And then use the following contents (you can tweak these settings):
uwsgi:
master: true
processes: 1
vaccum: true
chmod-socket: 666
uid: www-data
gid: www-data
plugins: python32
socket: /tmp/SITE_URL.sock
chdir: SITE_DIR
pythonpath: SITE_DIR
module: application
touch-reload: SITE_DIR/application.py
Finally restart the services:
service uwsgi start
service nginx start
@sindhujit
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I have my automation tool in python2.7 now. It is deployed with django1.11+nginx+wsgi. When I tried migrating to python3, it fails. I installed everything w.r.t. python3, created a new virtualenv, but I get "Internal Server Error".

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