Simple docker container to take screen grab from website for greenminds project. It works in the following manner

• Docker container runs a cron job every 20 mins
• Using Python Selenium library and headless firefox/geckdriver scrape.py captures a given URL
• Resultant png is converted to bmp and saved to /var/www/html
• As Docker container is running standard apache2 this image (screengrab.bmp) is now available from the root of the container host i.e http://35.176.129.138/screengrab.bmp . The apache root in the docker image is /var/www/html

Requirements:

• Public facing server that support Docker

Example installation on Amazon EC2 instance

• Install Docker
• clone/copy git code into folder
• build docker image by running following command from root of folder docker build -t <your-tag-name> --no-cache .
• run the docker container using following command ( setting it to forward port 80 on your host to port 80 in the container ) docker run -t -d -p 80:80
• Check it's running docker ps - this should show the running process
• browser to host URL/IP to download latest screengrab ( be mindful of your browser caching - perhaps adding a random querystring to the request might help )

Manually running scrape You can execute into the running docker container and manually run the scape

• docker exec -it <name-of-container> bash ( you can get the name by running docker ps )
• run python scrape.py to manually run

Example installation on ionos Ubuntu

• Install Docker (https://docs.docker.com/engine/install/ubuntu/)
• Install git 'apt-get install git'
• clone/copy git code into folder
• build docker image by running following command from root of folder docker build -t <your-tag-name> --no-cache .
• run the docker container using following command ( setting it to forward port 7000 on your host to port 80 in the container ) docker run -t -d -p 7000:80
• Check it's running docker ps - this should show the running process ( and show you the name of the container )
• Update firewall rule to allow access over 7000
• browser to host URL/IP:7000/screengrab.bmp to download latest screengrab ( be mindful of your browser caching - perhaps adding a random querystring to the request might help )

Manually running scrape You can execute into the running docker container and manually run the scape

• docker exec -it <name-of-container> bash ( you can get the name by running docker ps )
• run python scrape.py to manually run