如何在 Docker 中为 windows 安装卷？

Question

I'm trying to save data from my docker app to a host folder. My dockerfile is:

FROM python:3
   
# set a directory for the app
WORKDIR /usr/src/app

# copy all the files to the container
COPY . .

# install dependencies
RUN pip install --no-cache-dir -r requirements.txt

EXPOSE 8050

CMD ["python", "./app.py"]

I then build the image:

docker build <path> -t <tag>

And then run:

docker run -p 8050:8050 <tag>

In order to save the output from the docker app, which I was trying to do like this

pd.DataFrame(rows).to_excel('S:/Folder1/Folder2/Folder3/file.xlsx', index=False) 

I have to mount the volume, within Docker Settings>Resources>File Sharing I've added the directory 'S:/Folder1/Folder2/Folder3/' so that it can be mounted into Docker containers.

And then I tried to run the image:

docker run -p 8050:8050 -v "s:/folder1/folder2/folder3/":"/data" <tag>

this pop ups a window "Docker wants to access to C\dc\Shared\folder1\folder2\folder3" And I can choose to share or cancel, after selecting share, folder 3 is created in the right location but I get the error:

docker: Error response from daemon: error while creating mount source path '/host_mnt/uC/dc/Shared/folder1/folder2/folder3/': mkdir /host_mnt/uC: operation not permitted.

If I try a location on my C: drive this works without problems, it's just the shared drive that is giving me problems.

What is the right way to mount the volume so I can then save to that folder? Thank you

Answer 1

Your containerized app should call /data folder instead.