just a question, what was the rationale to use erofs instead of squashfs? I am doing test currently to add some python3 support so that I can run ansible on the bmcd for configuration and I am testing squashfs right now as RO base for the overlay.

ls output/images/ -lh
[...]
-rw-r--r-- 1 abra abra  50M Mar 17 19:32 rootfs.erofs
-rw-r--r-- 1 abra abra  26M Mar 17 19:32 rootfs.squashfs
[...]

This is huge improvement IMHO, with the base configuration, not modified the installed packages at all, for testing Needed changes so far: * kernel: add squashfs support * uboot: add squashfs support * small patch for preinit.sh Note: UBI install not yet testet