Is there support for overlayfs without fuse-overlayfs for rootless?

[eriksjolund]

According to
https://kernelnewbies.org/Linux_5.11#Unprivileged_Overlayfs_mounts
Linux kernel 5.11 "... allows non-privileged users to make use of Overlayfs"

In the list Shortcomings of Rootless Podman
https://github.com/containers/podman/blob/master/rootless.md
it's written:
"Can not use overlayfs driver, but does support fuse-overlayfs"

Is there already support for overlayfs (without using fuse-overlayfs) for rootless Podman?
(The list of shortcomings indicates that the answer is no but maybe things are changing?)

When I ran sudo dnf update today on my Fedora 33 computer the kernel was updated to version 5.11.7.

$ uname -r
5.11.7-200.fc33.x86_64
$ podman --version
podman version 3.0.1
$

[rhatdan]

@giuseppe began work on this, but I think there might be still a bug in overlay not supporting context (SELinux) mounts in rootless mode.

containers/storage#845

This will be vendored into podman 3.1, but I don't know if it will fully work.

@giuseppe what is the status on this?

[giuseppe]

yes, there is a bug in overlay that prevents us to use it from rootless.

We need to wait for Linux 5.12.

[giuseppe]

The fix is here: https://www.spinics.net/lists/selinux/msg35984.html