Dockerizing a Flask application

A template project using docker and flask

Getting started

Create a copy of .env.example and fill all the values and rename it as .env

Installing and setting up Docker in Linux

1. Install docker: sudo apt install docker.io
2. Enable service: sudo systemctl enable docker
3. Add user permissons: sudo usermod -aG docker $USER
4. Activate changes to groups: newgrp docker
5. Reboot your computer
6. Verify all: docker run hello-world

Running the project

1. Using VS Code Run and Debug option.
2. From VS Code terminal execute run_flask.sh script to start up the app using Flask Server
3. From VS Code terminal execute run_gunicorn.sh script to start up the app using Gunicorn

Cli Commands

Using a terminal just run flask and cli commands will be listed.

1. flask loc This command counts how many lines of code are there. It only check files with the following extensions:
   • .py
   • .html
   • .js
   • .css
2. flask token generates a 32 length secret token.

References

• Setting up user permissions in Linux
• Developing inside a container
• Debugging Flask app with Docker
• docker-compose.yml