Permission Denied (EACCES) when mounting local volumes in Dev Containers on Fedora/RHEL.

[stircrazyexpert101]

I am using the Dev Container CLI on a Fedora host. Even though my host user (UID 1000) matches the container user, I keep getting Permission Denied or empty directories when trying to run commands like ls or cargo run inside the container.

The files exist on my host, and id shows both users are 1000, but the container can't see them. What am I missing?

[BOOPESH-foxy]

The Fix: Security Labeling with :Z

To resolve the Permission Denied error on systems with SELinux (like Fedora, RHEL, or CentOS), you must tell Docker to relabel the volume context. This triggers Docker to automatically run chcon -Rt container_file_t on the host folder, changing the files with the correct security context so the container can access them.

Option 1: In devcontainer.json

Add the ,Z flag to your workspaceMount string:

"workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached,Z"

Option 2: In docker-compose.yml

Append the :Z to your volume definition:

services:
  api:
    volumes:
      - .:/workspace:cached,Z

After restarting your container, run ls -Z on your host terminal. You should see that the security label has officially changed to container_file_t.

[stircrazyexpert101]

Hey! Just wanted to thank you and say that this worked perfectly for me.

I was pulling my hair out with those Permission Denied errors , but adding that :Z flag to my docker-compose.yml fixed it instantly and i checked it with ls -Z and i could get the context changes