kennyvoo/docker-test

Docker practice

Repo : github-test

Part 1: Setup

I'll choose python:3.8-slim

docker file

FROM python:3.8-slim

Part 2: Use docker-compose

sudo docker compose -f docker-compose.yaml build
sudo docker compose run -it github-test sh

docker compose file

version: '3'

services:
  github-test:
    container_name: github-test
    image: github-test:v1
    build: 
      context: github-test
      dockerfile: Dockerfile

Part 3: Develop a Python program

Running gui from docker

#not sure if this is a good practice
xhost +
docker run -it -e DISPLAY=unix$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix github-test:v1 sh
apt update
apt-get install x11-xserver-utils -y
apt-get install python-tk -y
pip install matplotlib
python generate_random_numbers.py
exit
#remember to enable it 
xhost -

docker file

FROM python:3.8-slim

COPY . .   

generate_random_numbers.py

import random
import matplotlib
matplotlib.use( 'tkagg' )
import matplotlib.pyplot as plt

rand_nums= [random.randint(1,10) for i in range(10)]
plt.plot(rand_nums)
plt.show()

Part 4: Build a docker image using Dockerfile

#not sure if this is a good practice
xhost +
docker run -it -e DISPLAY=unix$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix github-test:v1 sh
python generate_random_numbers.py
exit
#remember to enable it 
xhost -

docker file

FROM python:3.8-slim

ARG DEBIAN_FRONTEND=noninteractive
ENV TZ=Europe/London
RUN apt update \
    && apt install python3-tk -y \
    && apt install x11-xserver-utils -y \
    && pip install matplotlib==3.2.1


COPY . .   

Part 5: Build a "runnable" Dockerfile

Set the environment variable and volume in compose file. run the script when running the docker

#not sure if this is a good practice
xhost +
docker compose -f docker-compose.yaml up --build
xhost -

docker file

FROM python:3.8-slim

ARG DEBIAN_FRONTEND=noninteractive
ENV TZ=Europe/London
RUN apt update \
    && apt install python3-tk -y \
    && apt install x11-xserver-utils -y \
    && pip install matplotlib==3.2.1


COPY . .   
CMD ["python","generate_random_numbers.py"]

docker compose file

version: '3'

services:
  github-test:
    container_name: github-test-container
    image: github-test:v1
    build: 
      context: ./github-test
      dockerfile: Dockerfile
    volumes:
     - /tmp/.X11-unix:/tmp/.X11-unix
    environment:
     - DISPLAY=unix$DISPLAY