Manual Deployment of Django Application

manual_deployment.md

Manual Deployment of Django Application

Deployment of Django application to ubuntu based server. We'll be using Nginx & WSGI to run the application. PostgresSQL will be used as the database in this example.

Pem File

You have to download pem file from the console to ssh into the server.

ssh -i key.pem ubuntu@(ip-address)

Clone the Repository

Clone your code for the application from the repository.

git clone (repo web URL)

Install and Configure VirtualEnv

Update the packages and installing pip with python3.

sudo apt-get update
sudo apt-get install python3-pip

Now install virtualenv and make a virtual enviornment.

sudo apt install virtualenv
virtualenv -p python3 (venv-name)

In case of Locale Issue:

export LC_ALL=C

Now you need to activate the virtual environment.

source (venv-name)/bin/activate

Install Django Requirements

Install the requirements for the your django application through pip.

cd (app folder)
pip install -r requirements.txt

If in any case you have to install psycopg2, you will get eggs error. You can resolve this by installing following libs:

sudo apt install libpq-dev python3-dev

Local Settings

Create local settings file on the server for local configurations.

cd (Main app folder)
vim local_settings.py

PostgresSQL Installation & Configuration

It will be good to refresh our local package index and then install postgresql.

sudo apt-get update
sudo apt-get install postgresql postgresql-contrib

Create database.

sudo -i -u postgres
createdb (db-name)

Add database settings to your local settings file like below:

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': (db-name),
        'USER': 'postgres',
        'PASSWORD': 'postgres',
        'HOST': 'localhost',
        'PORT': '',
    }
}

Now migrate the database.

python manage.py migrate

If you face any issue for db passwords, you can try this:

sudo -u postgres psql
ALTER USER postgres PASSWORD 'postgres';

Installing uWSGI

Now that we have two Django projects set up and ready to go, we can configure uWSGI

sudo apt-get install python-dev
sudo apt-get install uwsgi uwsgi-plugin-python3  -y

Creating Configuration Files

sudo vim /etc/uwsgi/apps-available/uwsgi.ini 

Add following details to this file:

[uwsgi]
virtualenv = (path-to-virtual-envr)
uid = www-data
gid = www-data
chmod-socket = 664
chown-socket = www-data
processes=4
threads=2
master=true
env = DJANGO_SETTINGS_MODULE=(project-name).settings
module = django.core.wsgi:get_wsgi_application()
chdir = (path-to-project)
socket = /tmp/(project-name).sock
logto = /var/log/uwsgi/(project-name).log
vacuum=true
thunder-lock
memory-report
max-requests=10000
no-orphans = true
limit-as=784
reload-on-as=784
reload-on-rss=512

Create Symbolic Link to Uwsgi

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

Restart uwsgi service and load new configuration

sudo service uwsgi restart

Install and Configure Nginx as a Reverse Proxy

With uwsgi configured and ready to go, we can now install and configure Nginx as our reverse proxy. This can be downloaded from Ubuntu's default repositories:

sudo apt-get install nginx

You can create a server block configuration file for each of your project

sudo nano /etc/nginx/sites-available/(project-name)

Create server block configuration for the project.

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/(project-name).sock;
             include     uwsgi_params;
             uwsgi_read_timeout 300;
    }
}

Create a symbolic link

sudo ln -s /etc/nginx/sites-available/(project-name) /etc/nginx/sites-enabled

You can test Nginx Configurations

sudo nginx -t

Now restart the Nginx

sudo service nginx restart

You are now good to go.

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