Docker Desktop on Ubuntu breaks permissions

[Axel29]

Description

When using Docker Desktop on Ubuntu, the host user / group is mapped to a "root" user / group within the container. Thus, when the Dockerfile adds the "APP_ID" as "1000", it doesn't actually match the real host machine user.

If I run a getent passwd to list users available, I get the following result:

and wit the getent group command to list groups

Finally, as you can see bellow, the file listed on the Docker container is with the user / group "root" but on the host machine, it is with my real user / group:

Because of that, every file created by Docker is broken and can't be used.

Steps To Reproduce

1. Install Docker Desktop on Ubuntu (tested on 22.04)
2. Follow the README instructions to setup a project
3. Try to create a file within the container (e.g: bin/cli touch test.txt)

Expected Result

1. The file is created

Actual Result

1. A permission denied is thrown

[holzkern]

Hi @Axel29,

I too had some issues with file ownership and permissions (there seems to be a general issue with docker desktop on linux: https://github.com/docker/desktop-linux/issues/31#issuecomment-1161606016). I did the following:

1. Run bin/fixowns and bin/fixperms
2. Now if you ls -la in the root directory of the host, you will see all files have user:group set to 100999:100999
3. I went ahead and created a new user group on my host: sudo addgroup --gid 100999 dockercontainer
4. Add your user to that group: sudo usermod -aG dockercontainer $USER
5. Now make sure users of the group can write files in your root directory: bin/clinotty find . \( -type f -or -type d \) -exec chmod ug+w {} +;
6. Restart your device for the changes to take (full) effect

Now you should be able to edit files on both your host and your container.