abdur75648/ocr-app-basic

Urdu OCR App

• Install dependencies
• Build "maskrcnn_benchmark"
• Run "sudo ufw allow 800" to open port 8000 by allowing it over the firewall
• Run app using "python manage.py runserver 10.17.10.9:8000"
• Access at [IP_ADDRRESS]:8000 on local machine

Automation

• Reference - This tutorial
• Serve our application using Gunicorn by firing the commands:
  • "gunicorn ocrapp.wsgi:application --bind 10.17.10.9:8000 --timeout 180"
• Now create a system socket file for gunicorn now:
  • "sudo vim /etc/systemd/system/gunicorn.socket"
• Paste following in it

    [Unit]
    Description=gunicorn socket

    [Socket]
    ListenStream=/run/gunicorn.sock

    [Install]
    WantedBy=sockets.target

• Next, we will create a service file for gunicorn
  • "sudo vim /etc/systemd/system/gunicorn.service"
• Paste following in it

[Unit]
Description=Gunicorn instance to serve OCR app
Requires=gunicorn.socket
After=network.target

[Service]
User=baadalvm
Group=www-data
WorkingDirectory=/home/baadalvm/gunicorn_app
Environment=PATH="/home/baadalvm/miniconda3/envs/cn/bin"
ExecStart=/home/baadalvm/miniconda3/envs/cn/bin/gunicorn \
        --access-logfile - \
        --workers 3 \
        --bind unix:/run/gunicorn.sock \
        ocrapp.wsgi:application

[Install]
WantedBy=multi-user.target

• Lets now start and enable the gunicorn socket

  • sudo systemctl start gunicorn.socket
  • sudo systemctl enable gunicorn.socket

• Gunicorn socket has started but service has not started yet (Can be verified at "sudo systemctl status gunicorn.[socket/service]")

• Trigger activation by sending a connection to the socket through curl:

  • curl --unix-socket /run/gunicorn.sock localhost

• Now we have to configure Nginx as a reverse proxy

• Create a configuration file for Nginx using the following command

  • "sudo vim /etc/nginx/sites-available/ocrapp"

• Paste the following in it

server {
        listen 80;
        server_name http://10.17.10.9;
        location / {
        include proxy_params;
        proxy_pass http://unix:/run/gunicorn.sock;
        proxy_connect_timeout       600;
        proxy_send_timeout          600;
        proxy_read_timeout          600;
        send_timeout                600;
        }

}

• Activate the configuration using the following command:
  • "sudo ln -s /etc/nginx/sites-available/ocrapp /etc/nginx/sites-enabled/"
• You may need to delete "sites-enabled" before previous step (Do once if it doesn't work)
• Restart nginx and allow the changes to take place
  • sudo systemctl restart nginx
• App should be available at "http://10.17.10.9"