Using Docker to Containerize a Python App

Just experimenting with building Docker images.
Containerizing a Python3-Streamlit app, in this case.

Inspired by this short guide which I recommend.

Pre-installed on your machine

• Git
• Docker

A simple way to work with Docker images locally:
https://www.docker.com/products/docker-desktop/

Tech Stack

• Tested on macOS X
• Python 3.11.4
• Streamlit
• Debian-based container

Running the App

1. Clone git repo & cd into it

git clone https://github.com/eitancj/python_in_docker
cd python_in_docker

2. Build image

docker build -t python_in_docker:V1 .

# May take a few minutes: Streamlit is relatively heavy

3. Verify image creation

docker images python_in_docker

4. Run app

docker run -d --rm -p 8501:8501 --name pydock python_in_docker:V1

# Make sure no other running process is using that port on your machine

5. Test app

open http://localhost:8501 # will open in your default web browser

# Or simply copy and paste the address into your web browser

6. Gracefully stop (and remove) container when you're done

docker container stop pydock

7. Remove the created image

docker rmi python_in_docker:V1

8. Clean up local copy (unless you want to keep it)

cd .. && rm -rf python_in_docker

# BE PRUDENT WITH 'rm -rf'.
# Make sure you're in the right directory and aiming at the right folder.

9. That's it