Question 81861 in Docker Question posted in
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Where the new folder is created when using Dockerfile

Please help me understand where the new folder is created. When I docker exec -it <mycontainer> bash the container, the created folder is not there.

Dockerfile:

FROM python:3.7-alpine
WORKDIR /app
RUN pip install -r requirements.txt
RUN mkdir -p /new_folder
COPY . .
CMD ["gunicorn", "-w 4", "main:app"]

I also tried copying the local stuff before creating a new folder, still can’t see the folder created in the container.

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2

Answers


  1. 0

    your working directory is /app and you are copying files from your current dierctory to /app. when your container is running do this

    docker exec -it <container_id> pwd

    you’ll see /app in output
    but you are creating new_folder as a root directory. so you can’t see it inside /app
    enter image description here

    to see your root directories you can run this:

    docker exec -it container_id /bin/sh -c "ls -lah ..

    also my Dockerfile is this:

    FROM python:3.7-alpine
WORKDIR /app
RUN mkdir -p /new_folder
COPY . .
CMD ["python" , "-c" , "import time; time.sleep(10000)"]
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  2. 0

    Your folder is created at the filesystem root : /

    try docker exec -it <mycontainer> bash and then, in the container, ls /

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