python-docker-app

Learn docker basics for python code

🐳 Docker Learning

🧪 Task 1: Create a Python App and Run It with Docker

✅ Steps

1. Create a simple Python file (app.py) that accepts optional input.
2. Write a Dockerfile for this app.
3. Build and run the Docker image locally.

🧾 Commands

docker build -t my-image .
docker run my-image
docker run my-image --input "Hello Docker"

🐳 Docker Image Commands Summary

Action	Command	Description
Build Docker image	docker build -t my-app:v1 .	This will create a Docker image
Run image	docker run my-app:v1	Runs the Docker image without container name
Run with container name	docker run --name conta1 my-app:v1	Runs the image and assigns container name conta1
Interactive run (no name)	docker run -it my-app:v2	Runs the image interactively without a container name
Interactive run (with name)	docker run -it --name conta3 my-app:v2	Runs the image interactively and names it conta3
Bash shell inside container	docker run -it --name conta4 my-app:v4 /bin/bash	Launches container with bash shell for terminal access
Self-contained Linux	–	This provides a self-contained mini Linux environment
Check container	–	Use docker ps or docker inspect
Check working directory	–	Inside container, use pwd or check Dockerfile WORKDIR
Check exec	docker exec -it conta4 /bin/bash	Execute bash inside a running container
Run Python file	python app.py	Run Python script from inside container terminal
restart container	docker start -ai conta4
delete container	docker rm conta4

🧪 Docker Learning Tasks

Task	Topic	Details
Task 1	python-docker-app	Project setup
		Run it locally
		Test with input and without input
Task 2	Build Image	Create Docker image
		Build from VS Code
		Build from Docker Desktop
		Test with input and without input
Task 3	docker run	Run Docker image

🎯 Continue Learning:

• Add environment variables using ENV

• Mount volumes for persistent data

• Use docker-compose for multi-container apps