File handling in Python - 'Permission denied' scenarios when trying to write to a file in a Docker container
I'm currently developing a Python application using Flask and Docker, and I'm working with a frustrating scenario when trying to write to a file. The specific behavior I'm seeing is `PermissionError: [Errno 13] Permission denied`. Here’s the relevant part of my code where I attempt to write a log file: ```python import os log_path = '/app/logs/my_log_file.txt' with open(log_path, 'a') as log_file: log_file.write('This is a log entry.\n') ``` The directory `/app/logs` is created in my Dockerfile as follows: ```dockerfile FROM python:3.9 WORKDIR /app COPY . /app RUN mkdir -p logs ``` When I run the Docker container, I can confirm that the `logs` directory is created, but I get the `Permission denied` behavior upon trying to write to `my_log_file.txt`. I've tried changing the permissions of the directory by adding `RUN chmod -R 777 /app/logs` in my Dockerfile, but that doesn't seem to resolve the scenario. Additionally, I've checked the ownership of the files and directories using `ls -l` and noticed that they are owned by root. I’m running the container with the command `docker run -it --rm my_flask_app`, and I'm not passing any user flags. I suspect it might be related to the user permissions inside the container, but I'm not sure how to resolve this best while adhering to security practices. I would appreciate any guidance on how to correctly configure file permissions in this scenario. Could this approach be failing due to something specific to Docker or Flask configurations? Any help would be greatly appreciated!