opensuse-lxd-tools
After running the script you should have 2 files in the directory: rootfs.tar.gz and metadata.tar.gz, those can be used to import as a image into LXD:
lxc image import metadata.tar.gz rootfs-tw.tar.gz --alias Tumbleweed
After importing containers can be created from the image:
lxc launch Tumbleweed <containername>