Operation not permitted for files mounted with docker compose

Docker Desktop
,
1

Hello community,

I mount an .env file in order to not re-build in case I change this file. With Docker Desktop for Windows I encounted an Operation not permitted error when reading the file which obviously is required to run my containerized application accordingly. So it’s a blocker for me. The question is. How to fix that error?

What I did so far:

  • Change volume mount to :ro and removed again
  • Own the whole srv directory recursively by root
  • Own everything by node and change to User node

My compose file:

...
volumes:
 - "./.env:/srv/.env"
...

Shell to the container:
whoami: root

ls -la: 
-rwxr-xr-x   1 root root    999 Jan  8 10:52 .env
-rwxr-xr-x   1 root root    663 Sep 26 09:50 .eslintrc.js

So the file .eslintrc.js is copied in the Dockerfile using COPY instruction. No error reading that file.
The file .env is mounted through a volume. Everything seems identical but I can’t read that file.

I noticed I get asked everytime by Docker Desktop Filesharing if I want to share the .env file. And only for that file. All other files are fine to approve it once.

I know I can change my setup to COPY the .env file as well using my Dockerfile (actually already did that in order to continue my work) but I want to use a volume mount for that file.

How can I do that?
Where might the problem be?

2

Hello again, I found the solution to my problem on my own. The .env file was contained in my .dockerignore file. Removing it from there fixed the problem. Kind regards, Matthias