Django Deployment in Linux Vps

# Install database packages
yum install postgresql-devel postgresql-libs postgresql postgresql-server \
postgresql-contrib -y
# Install database driver
sudo yum install python-psycopg2

sudo systemctl enable postgresql
sudo systemctl start postgresql

# login using postgres user
sudo su - postgres
# create a database
createdb example_db
# create a user for example_db
createuser example_user --interactive
# login to psql shell
psql example_db
# set a password for example_user
ALTER USER example_user WITH PASSWORD 'yourpassword';
# grant all privileges for example user on example_db database
GRANT ALL ON DATABASE example_db to example_user;
# quit the database
\q

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'example_db',
        'USER': 'example_user',
        'PASSWORD': 'yourpassword',
        'HOST': '127.0.0.1',
        'PORT': '5432',
    }
}

#.
 (venv)# pip install gunicorn

#!/bin/bash
# Purpose: Gunicorn starter
# Author: manojit.gautam@gmail.com
# Name of an application
NAME="Your projectname"
# project directory
PROJECTDIR=/webapps/example.com
# django project virutalenv directory
VENVDIR=/webapps/example.com/venv
# Project source directory
SRCDIR=/webapps/example.com/master/src
# Sock file as gunicorn will communicate using unix socket
SOCKFILE=$PROJECTDIR/gunicorn.sock
# User who runs the app
USER=webapps
# the group to run as
GROUP=webapps
# how many worker processes should Gunicorn spawn
NUM_WORKERS=3
# which settings file should Django use
# If you haven't spit your file it should example.settings only
DJANGO_SETTINGS_MODULE=example.settings.production
# WSGI module name
DJANGO_WSGI_MODULE=example.wsgi
# Activate the virtual environment
source $VENVDIR/bin/activate
# Export the settings module
export DJANGO_SETTINGS_MODULE=$DJANGO_SETTINGS_MODULE
# Export the python path from virtualenv dir
export PYTHONPATH=$DJANGODIR:$PYTHONPATH
# move to src dir !IMPORTANT otherwise it won't work.
cd $SRCDIR
# Start your Django Unicorn
# Programs meant to be run under supervisor should not daemonize themselves (do not use --daemon)
exec $VENVDIR/bin/gunicorn ${DJANGO_WSGI_MODULE}:application \
  --name $NAME \
  --workers $NUM_WORKERS \
  --user=$USER --group=$GROUP \
  --bind=unix:$SOCKFILE \
  --log-level=debug \
  --log-file=-

  # install Supervisor
  sudo yum install Supervisor
  # create the supervisor configuration script
  # you need to create this script to work
  echo_supervisord_conf > /etc/supervisord.conf
  # create the site specific configuration and include in supervisord.conf file
  # to include the below use include directives
  [include]
  files = /etc/supervisor/conf.d/*.conf

touch /etc/supervisor/conf.d/example.com.conf

[program:example]
command=/webapps/example.com/gunicorn_start.sh              
user=webapps                                                          
stdout_logfile=/webapps/example.com/logs/gunicorn_supervisor.log   
redirect_stderr=true                                                
environment=LANG=en_US.UTF-8,LC_ALL=en_US.UTF-8  

sudo yum install nginx
sudo systemctl enable nginx
sudo systemctl start nginx

upstream example {
  # fail_timeout=0 means we always retry an upstream even if it failed
  # to return a good HTTP response (in case the Unicorn master nukes a
  # single worker for timing out).

  server unix:/webapps/example.com/gunicorn.sock fail_timeout=0;
}

server{
	listen 80;
	server_name example.com;
	client_max_body_size 4G;
	access_log /webapps/example.com/logs/nginx-access.log;
	error_log /webapps/example.com/logs/nginx-error.log;


	# Robot.txt configuration
  # developers work on robot.txt more so it is suitable to push inside source code.
      	location /robots.txt {
      	  alias /webapps/example.org/robots.txt;
	}
	# Static assets configuration
 	location /static/ {
        alias   /webapps/example.com/master/src/assets/;
        expires 30d;
    	}

	# Media configuration
	location /media/ {
        alias   /webapps/example.com/master/src/media/;
        expires 30d;
    	}

        # Need to review
      location / {
    	proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   	  proxy_set_header Host $http_host;
    	proxy_redirect off;
   	  if (!-f $request_filename) {
        	proxy_pass http://example; #app name
        	break;
    		}
	}

        # Favicon configuration
        location /favicon.ico {
    	 alias /webapps/example.com/master/src/assets/img/favicon.ico;
	}

        # Prevent hidden files being serverd
	location ~ /\. { access_log off; log_not_found off; deny all; }

	# Error page configuration
        error_page 500 502 503 504 /500.html;
    	location = /500.html {
        root /webapps/example.com/master/src/static/;
   	 }
}

  supervisorctl start example

supervisorctl stop example