Python/Docker

Test a docker image

Pull images

sudo docker pull python:3.8.6
sudo docker pull python:3.8.6-slim
sudo docker pull python:3.8.6-alpine
sudo docker images

python              3.8.6-alpine        8871758c6a8f        29 hours ago        42.4MB
python              3.8.6-slim          2be36bcc692b        29 hours ago        113MB
python              3.8.6               b4b9bf31ec03        29 hours ago        882MB

	size	shell	lxml
python:{version}	882MB	bash	O
python:{version}-slim	113MB	bash	O
python:{version}-alpine	42.4MB	busybox (/bin/sh)	X

Read platform infomations

sudo docker run --name py01 -it python:3.8.6
sudo docker run --name py01 -it python:3.8.6-slim
sudo docker run --name py01 -it python:3.8.6-alpine

>>> import platform
>>> platform.uname()
>>> platform.machine()
>>> exit()

List packages

sudo docker run --name py02 -it python:3.8.6 /bin/bash
sudo docker run --name py02 -it python:3.8.6-slim /bin/bash
sudo docker run --name py02 -it python:3.8.6-alpine /bin/sh

pip list

Package    Version
---------- -------
pip        20.3.3
setuptools 51.0.0
wheel      0.36.2

Do a scheduled job

sudo docker run --name py01 -v `pwd`:/app -w /app -it python:3.8.6-slim /bin/bash
pip install schedule
python start.py

start.py

import schedule
import time

def job():
    print("I'm working")

schedule.every(5).seconds.do(job)

while True:
    schedule.run_pending()
    time.sleep(1)

Do a scheduled job II (docker-compose)

sudo docker-compose up

docker-compose.yaml

version: "3.7"

services:
  app:
    image: python:3.8.6-slim
    command: sh start.sh
    volumes:
      - ${APP_HOME}:/app
    working_dir: /app

requirements.txt

schedule == 0.6.0

start.sh

pip install -r requirements.txt
python /app/start.py

start.py

import schedule
import time

def job():
    print("I'm working")

schedule.every(5).seconds.do(job)

while True:
    schedule.run_pending()
    time.sleep(1)