Can't containerise Python app with Docker

Question

I have a multi-directory Python Selenium app that I want to put into a container with Docker
I don't have experience with this tech, so I tried making a Dockerfile this way Dockerfile:

FROM python:3.8 COPY ./* ./

RUN pip install selenium pytest pytest-html

CMD python /tests/form_page/test_form_page.py
I want this Python app run from a container
I also uderstand that I need to add a venv (probably) and a Chrome driver for this app to work, but I don't know how to do this

Could you please help me out on this one?

PS if this would help here's the source code https://github.com/anatolyRozhkov/RozhkovPetProject.git

The standard Python image certainly does not include a GUI, let alone then Chrome or Firefox. You'll need to set up quite a bit of software by hand, or find a better image to start from. Look for a "headless browser" image perhaps; adding Python and Selenium to that should be a lot easier. — tripleee
– tripleee, Commented Mar 27, 2022 at 14:17

tripleee · Accepted Answer · 2022-03-27 14:48:55Z

1

I believe that you have install Google Chrome browser and Chrome driver inside your Dockerfile. Then build the docker image in your container and run your docker images using the command docker run <image_name>:latest

FROM python:3.8

# install google chrome
RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
RUN sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list'
RUN apt-get -y update
RUN apt-get install -y google-chrome-stable

# install chromedriver
RUN apt-get install -yqq unzip
RUN wget -O /tmp/chromedriver.zip http://chromedriver.storage.googleapis.com/`curl -sS chromedriver.storage.googleapis.com/LATEST_RELEASE`/chromedriver_linux64.zip
RUN unzip /tmp/chromedriver.zip chromedriver -d /usr/local/bin/

# set display port to avoid crash
ENV DISPLAY=:99

RUN pip install selenium
RUN pip install pytest

WORKDIR /app -#python file that u want to run
COPY . /app

CMD ["python", "/tests/form_page/test_form_page.py"]

edited Mar 27, 2022 at 14:48

tripleee

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answered Mar 27, 2022 at 14:22

Gavin Teo Juen

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3 Comments

Anatoly Rozhkov Over a year ago

Thank you so much, this should help! Could you please explain what is WORKDIR /app -#python file that u want to run? Do I still need to specify the path to the python file I want to run in the CMD?

Gavin Teo Juen Over a year ago

According to this documentation docs.docker.com/engine/reference/builder/#workdir , The WORKDIR instruction sets the working directory for any RUN, CMD, ENTRYPOINT, COPY and ADD instructions that follow it in the Dockerfile. If the WORKDIR doesn’t exist, it will be created even if it’s not used in any subsequent Dockerfile instruction. I believe that i work as a working directory so that it can perform the specific instructions. you should run the docker image using the command "docker run <image_name>. I believe u can retrieve the image name using the command "docker images"

Gavin Teo Juen Over a year ago

Feel free to ask here again if you encountered any problems . I would be willing to help you :D

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