REST Api

The Django back end is created for easily building applications on Rest Framework. This repo include packages like dashboard and system settings. This functionality is as same as Python-Django-Html/LafluxV2.

Dashboard

Includes basic CRUD's. CRUD's include Users, Roles, etc. User-Role Mapping, Access Control Logic (ACL), etc are also there.

System Settings

This package includes basic CRUD's for settings. Eg: Conutry, City, Email Config, SMS Config, etc.

Installation & Running

migrate and populatedb

./manage.py migrate
./manage.py createadminuser
./manage.py populatedb

digitalocean setup

$ apt-get update
$ apt-get install python3-pip apache2 libapache2-mod-wsgi-py3

Change dir: $ cd /var/www/ Clone the repo: $ git clone https://gitlab.com/DonamsInnovations/Vidhyadhan-Back-End.git rename: $ mv Vidhyadhan-Back-End backend Change dir: $ cd backend

Install Python 3.6::

$ sudo add-apt-repository ppa:jonathonf/python-3.6
$ sudo apt-get update
$ sudo apt-get install python3.6

Create virtual and install django::

$ apt install python3-pip
$ pip3 install virtualenv
$ virtualenv --python=/usr/bin/python3.6 venv
$ source venv/bin/activate
$ pip install -r requirements.txt

Install PostgreSQL::

$ apt-get install postgresql postgresql-contrib
$ sudo -u postgres psql
ALTER USER postgres WITH PASSWORD 'root';
create database pyfluxbackend;
\q

VirtualHost::

$ vim /etc/apache2/sites-available/backend.conf 
Listen 8000
<VirtualHost *:8000>
    WSGIDaemonProcess backendapp python-home=/var/www/backend/venv python-path=/var/www/backend
    WSGIProcessGroup backendapp
    WSGIPassAuthorization On
    WSGIScriptAlias / /var/www/backend/backend/wsgi.py
    ErrorLog /var/www/backend/error.log
    CustomLog /var/www/backend/access.log combined
</VirtualHost>

restart apache::

$ a2ensite backend.conf
$ service apache2 restart

to test celery::

celery -A backend worker -l info -B
celery -A backend worker -l info -B --concurrency=1

to see process ps aux | grep celery

to kill celery pkill -9 -f 'celery'

Celery Installation

Install Rabbitmq:

$ echo 'deb http://www.rabbitmq.com/debian/ testing main' |
     sudo tee /etc/apt/sources.list.d/rabbitmq.list
$ apt-get update
$ apt-get install rabbitmq-server

To run on mac :

/usr/local/sbin/rabbitmq-server

Daemonization here is a nice tutorial

$ apt-get install supervisor

Then, add /etc/supervisor/conf.d/celery_proj_worker.conf file:

; celery -A backend worker -l info -B
; Worker
[program:projworker]
command=/var/www/dev.pyflux.in/backend/venv/bin/celery -A backend worker -l info
directory=/var/www/dev.pyflux.in/backend
numprocs=1
autostart=true
autorestart=true
startsecs=10
stopwaitsecs = 600 
killasgroup=true
priority=998

Also add /etc/supervisor/conf.d/celery_proj_beat.conf file:

; Beat
[program:projbeat]
command=/var/www/dev.pyflux.in/backend/venv/bin/celery -A backend beat -l info
directory=/var/www/dev.pyflux.in/backend
numprocs=1
autostart=true
autorestart=true
startsecs=10
priority=999

for Socket.IO Server add /etc/supervisor/conf.d/socketio.conf file:

[program:socketio]
command = /var/www/dev.pyflux.in/backend/venv/bin/python /var/www/dev.pyflux.in/backend/socketio_server.py

super visor logs can be found in:

/var/log/supervisor/

update change for supervisor:

$ supervisorctl reread
$ supervisorctl update

Finally we can start the services :

$ supervisorctl start projworker
$ supervisorctl start projbeat

or even check the status/stop/restart:

$ supervisorctl stop projworker
$ supervisorctl restart projworker
$ supervisorctl status projworker

PDF Generation::

For pdfkit you need to Install wkhtmltopdf, vpn setup:

install ::

sudo apt-get install wkhtmltopdf

if there is an xserver problem::

wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.3/wkhtmltox-0.12.3_linux-generic-amd64.tar.xz
tar vxf wkhtmltox-0.12.3_linux-generic-amd64.tar.xz 
cp wkhtmltox/bin/wk* /usr/local/bin/
chmod +x /usr/local/bin/wkhtmltopdf

Permission Check:

• Need to block port 81 from outside users
• Added middleware, so that only authenticated users can access.