Docker watchdog - watch the baby tucan!

This repository contains two very similar applications (src/app1 and src/app2) that are packaged into docker images. They both use watchdog to react to changes in a directory (default: $HOME/Desktop/test) which is specified as an environment variable to the respective Docker container (see run_docker_watchdog_*.sh).

App1

• listens to the creation (aka copying) of images that match the name *-color.png in the directory mounted into the first Docker container (default: $HOME/Desktop/test).
• converts the images to grayscale and saves them as *-grayscale.png

App2

• listens to the creation (aka copying) of images that match the name *-grayscale.png in the directory mounted into the second Docker container (default: $HOME/Desktop/test).
• inverts the images' colors and saves them as *-invert.png

Try it out

Prerequisites

You need to have the following installed:

• Docker
• Python3

Basics

Clone this repository and cd into its root directory.

Start App1

1. Run bash build_docker_watchdog_1.sh to build the Docker image containing App1.
2. Run bash run_docker_watchdog_1.sh to run the Docker container.

Start App2

1. Run bash build_docker_watchdog_2.sh to build the Docker image containing App2.
2. Run bash run_docker_watchdog_2.sh to run the Docker container.

Copy images

1. Copy a .png image which matches the naming convention *-color.png (e.g. the example picture images/baby-tucan-color.png) into the mounted directory (default: $HOME/Desktop/test).

Mind that moving the file does not work, only copying!

Watch ❤ cuteness ❤ happening!