Use uwsgi the right way
Using uwsgi to deply django site on ubuntu server is quite easy, but there are still something you need to know before making mistakes.
install
You have two ways to install uwsgi on ubuntu: apt-get or pip
apt-get
if you use apt-get, you need to install the python plugin:
sudo apt-get install uwsgi-plugin-python
sudo apt-get install uwsgi
And, in your uwsgi ini file for your site, you need to add this:
plugins=python
pip
if you use pip, you need to install python-dev first:
sudo apt-get install python-dev
sudo pip install uwsgi
And, you don't need the plugins=python in ini file anymore.
See the sudo before pip? Yes, uwsgi should be installed in global system.
If you miss the sudo here, you may install it in your virtualenv.
It's meaningless and you may have trouble running it.
daemonize uwsgi
Daemonize means make uwsgi run on system boot and in the background.
According to how you install uwsgi, you have two ways.
apt-get
When you apt-get install uwsgi on ubuntu, it's installed as a service automatically. The magic lies in this file:
/etc/init.d/uwsgi
Files in /etc/init.d will be loaded by sysvinit. Then you can manage your uwsgi service like this:
sudo /etc/init.d/uwsgi start|stop|restart|reload
or:
sudo service uwsgi start|stop|restart|reload
the service command can find the service managed by sysvinit
pip
If you uwsgi is installed by pip, you only have the executable file in /usr/local/bin/uwsgi, you need to daemonize it yourself.
When you open some of the files in /etc/init.d/, you may feel sad:
I just want to register uwsgi as a service, why I need to write such long a script which looks similar to the others? It doesn't make sense.
Good news is that it is quite simple with the help of Upstart, which is an alternative to sysvinit. It use /etc/init/ instead of /etc/init.d/.
Just create a file /etc/init/uwsgi.conf with following content:
description "uWSGI Emperor"
start on runlevel [2345]
stop on runlevel [!2345]
respawn
exec /usr/local/bin/uwsgi --emperor /etc/uwsgi/vassals/ --logto /var/log/uwsgi.log
and then, you can manage your uwsgi process like this:
sudo initctl start|stop|restart|reload| uwsgi
or, still this:
sudo service uwsgi start|stop|restart|reload
Yes, as you can see, the service command is smart, it can manage service from both sysvinit and Upstart, with the same command.
And, if you have both /etc/init.d/uwsgi and /etc/init/uwsgi.conf, when you say:
sudo service uwsgi restart
It will restart the Upstart file /etc/init/uwsgi.conf.
The sysvinit one will be ignored, or something similar.
uwsgi config for your site
I recommend everyone to use the pip and Upstart way, it's much better then the apt-get way.
If so, you are using the emperor mode of uwsgi, which is very handy and powerful.
Now, you can create a ini file in /etc/uwsgi/vassals/ like this:
[uwsgi]
virtualenv=/path/to/venv/
chdir=/path/to/proj/root
module=wsgi:application
env=DJANGO_SETTINGS_MODULE=settings
master=True
vacuum=True
socket=/tmp/%n.sock
pidfile=/tmp/%n.pid
daemonize=/var/log/uwsgi/%n.log
The %n means your file name. For example, my project name is 'example', I create a example.ini file for it. Then the %n means 'example'. You don't need to replace it with real name. uwsgi will do this for you.
And then restart or reload uwsgi:
sudo service uwsgi restart
Check your socket file:
ll /tmp/*.sock
If it's there, you are successful with uwsgi now:)
nginx config for your site
Take domain example.com for example:
server {
listen 80;
server_name www.example.com;
return 301 $scheme://example.com$request_uri;
}
server {
listen 80;
charset utf-8;
server_name example.com;
location /static/ {
alias /path/to/static/;
}
location /media/ {
alias /path/to/media/;
}
location / {
try_files $uri @django;
}
location @django {
uwsgi_pass unix:///tmp/example.sock;
include uwsgi_params;
}
}
restart nginx, you will see your site!
answer to you question
Your config file for uwsgi is /etc/init/uwsgi-server.conf
So, the name you should use is uwsgi-server, not uwsgi
you need to restart your uwsgi emperor instance like this:
sudo initctl restart uwsgi-server
or:
sudo service uwsgi-server restart
That's all!
