Currently, rootless overlay2 storage driver works only on Ubuntu and Debian 10 hosts.

Supporting fuse-overlayfs would be highly useful for the users of other distros.

System requirement

• fuse-overlayfs needs to be installed
• Kernel needs to be >= 4.18

Implementation

Podman already implements fuse-overlayfs, but it is implemented as a storage opt ("overlay.mount_program") rather than an independent storage driver: https://github.com/containers/storage/blob/01ea27db516e1ea8dd22b63b69d3a66c571effa7/drivers/overlay/overlay.go#L307

For Moby, I suggest implementing it as a new independent storage driver "fuse-overlayfs".

My first plan was to wait until Moby migrates to containerd snapshotters and use containerd fuse-overlayfs plugin, but it is not likely to happen in foreseeable future.