# FACEBOOK APP FRIENDS

Assuming that the project folder is: /var/wwww/friends

    Let’s change the ownership to the user you are logged in to
    
        - sudo chown -R <system_logged_user>:<system_logged_user> /var/www/friends/

    Create a virtual environment env 
    
        - virtualenv vfriends

    Activate the virtual environmenT
    
        - . vfriends/bin/activate

    About UWSGI, Make sure you have the required compilers and tools:
    
        - sudo apt-get install build-essential python python-dev

    RUN requirements.txt
    
        - pip install -r requirements.txt

CONFIGURATION NGINX
 
    Let’s start by removing the Nginx’s default site configuration (depending of your nginx repository, choose one of the next options):
      
        - sudo rm /etc/nginx/sites-enabled/default
        
        or 
        
        - sudo rm /etc/nginx/conf.d/default

    The nginx configuration file is : /var/www/friends/instance/friends_nginx.conf

    Symlink the configuration file to nginx’s configuration files directory and restart nginx:

        - sudo ln -s /var/www/friends/instance/friends_nginx.conf /etc/nginx/conf.d/
        - sudo /etc/init.d/nginx restart

CONFIGURATION UWSGI

    The uwsgi configuration file is : /var/www/friends/instance/friends_uwsgi.ini

    Let’s create a new directory for uwsgi log files, and change its owner to your user:

        - sudo mkdir -p /var/log/uwsgi
        - sudo chown -R <system_logged_user>:<system_logged_user> /var/log/uwsgi



    Check if uwsgi can execute your app:
        - uwsgi --ini /var/www/friends/instance/friends_uwsgi.ini



The only thing left to do, is to configure uWSGI to run as a background service. That’s the duty of uWSGI Emperor.


UWSGI Emperor

    Create a new upstart configuration file to execute emperor 
        - /etc/init/uwsgi.conf

    with the next content:
    
    #begin file /etc/init/uwsgi.conf

        description "uWSGI"
        start on runlevel [2345]
        stop on runlevel [06]
        respawn

        env UWSGI=/var/www/friends/vfriends/local/bin/uwsgi
        env LOGTO=/var/log/uwsgi/emperor.log

        exec $UWSGI --master --emperor /etc/uwsgi/vassals --die-on-term --uid www-data --gid www-data --logto $LOGTO

    #end file 

    The last line executes the uWSGI daemon and sets it to look for config files in the /etc/uwsgi/vassals folder. Let’s create this folder and symlink the configuration file we created earlier into it:

        - sudo mkdir /etc/uwsgi && sudo mkdir /etc/uwsgi/vassals
        - sudo ln -s /var/www/friends/instance/friends_uwsgi.ini /etc/uwsgi/vassals

    Also, the last line states the user that will be used to execute the daemon is www-data. For simplicity’s sake, let’s set him as the owner of the application and log folders:
        - sudo chown -R www-data:www-data /var/www/friends/
        - sudo chown -R www-data:www-data /var/log/uwsgi/

Note: The nginx version we installed earlier uses the “www-data” user for executing nginx. Nginx versions from other repositories may use a user named “nginx” instead.

    Now we can start uwsgi
        - sudo start uwsgi



Configuration file for database, url_prefix: /var/www/friends/config.py