fuse-overlayfs is not a valid storage_driver

[mergwyn]

Use Case

The parameter storage_driver has valid values of aufs, devicemapper, btrfs, overlay, overlay2, vfs and zfs. I am trying to run docker in a lxd/lxc container on ubuntu with a zfs filesystem and do not want to use the default vfs as it is too inefficient. From reading, it would seem that the recommended solution for docker inside lxc is the fuse-overlayfs driver.

Describe the Solution You Would Like

Add fuse-overlayfs to the valid list of options for storage_driver.

Describe Alternatives You've Considered

Continue to use vfs, but this is slow and space hungry.
Use a btrfs backed lxd storage pool, but this causes system hangs.
Use a vm rather than a container, but this will use more resources.

Additional Context

Add any other context or screenshots about the feature request here.