metztli is my own analogue of debootstrap tool for openSUSE. A set of shell scripts that makes openSUSE installation from scratch for you. It is something like KIWI but less complex and less customizable. I made small images (about 250 Mb) for embedded industrial computers with metztli.
You can see HTML version of man page.
Checkout the code from subversion:
svn co svn://curl.sai.msu.ru/metztli/branches/zypper metztli