Introduction.

This tutorial will demonstrate how to install and configure uwsgi and nginx on Ubuntu 14.04 to  serve Django applications

Install uwsgi and nginx.

sudo apt-get update
sudo apt-get install nginx uwsgi uwsgi-plugin-python3  -y

Configure uWSGi.

Create uwsgi configuration file
sudo vim /etc/uwsgi/apps-available/uwsgi.ini 


[uwsgi]
virtualenv = {{ virtual_env path }}                             #virtualenv support if python libraries and interpreter are installed in virtual enviroment                
uid = www-data                                                  #user running uwsgi
gid = www-data                                                  #group running uwsgi
chmod-socket = 664                                              #uwsgi socket permission (srw-rw-r--)
chown-socket = www-data                                         #uwsgi socket owner      (srw-rw-r-- 1 www-data www-data)
processes=4                                                     #number of uwsgi processes
threads=2                                                       #number of threads of each process
master=true                                                     #master process to manage all uwsgi processes
env = DJANGO_SETTINGS_MODULE={{ dir_name }}.settings            #load django settings module
module = django.core.wsgi:get_wsgi_application()                #load wsgi module
chdir = {{ project_directory }}                                 #django project directory
socket = /tmp/{{site_name}}.sock                                #unix socket for communication of other servers like nginx
logto = /var/log/uwsgi/{{site_name}}.log                        #uwsgi log file location
vacuum=true                                                     #uwsgi socket {socket = /tmp/{{site_name}}.sock} will automatically cleanup when service stop
thunder-lock                                                    #To avoid deadlock in uwsgi threads
memory-report                                                   #will give memory usage of each process in log file at location { logto = /var/log/uwsgi/{{site_name}}.log }
max-requests=10000                                              #uwsgi will respawn new process after requests served define by the argument
no-orphans = true                                               #No single process will exists wihtout master
limit-as=784                                                    #Single uwsgi process can not reserve more address space(ram + disk) define by this parameter , this parameter is necessary to avoid memory leakage 
reload-on-as=784                                                #uwsgi process will reload with same request call if try to allocate more address space
reload-on-rss=512                                               #Single uwsgi process can not resver more sapce in memory area define by this parameter




Enable uwsgi configuration 

cd /etc/uwsgi/apps-enabled/ 
ln -s /etc/uwsgi/apps-available/uwsgi.ini  .

Restart uwsgi service and load new configuration 

/etc/init.d/uwsgi restart




Configure Nginx as reverse proxy.

After nginx installed , create server block configuration for project.

sudo vim sudo nano /etc/nginx/sites-available/{{ virtual_host }}

server {
        listen 80;
        server_name  {{ domain_name }};
        access_log  /var/log/nginx/{{ domain_name}}_access.log;
        error_log  /var/log/nginx/{{ domain_name}}_error.log;

        location / {
             uwsgi_pass unix:///tmp/{{site_name}}.sock;        #uwsgi socket that nginx will communicate for requests and responses
             include     uwsgi_params;
             uwsgi_read_timeout 300;
    }
}


Enable nginx virtual host configuration

cd /etc/nginx/sites-enabled/
ln -s  /etc/nginx/sites-availble/{{ virtual_host }} .

Check nginx configuration

nginx -t  (Return Ok if there is no error in configuration)

Reload nginx and new virtual host configuration

/etc/init.c/nginx restart