There will be a bit of a problem for upgrade from 5.5, as we technically don't have any update channel for openSUSE packages, only for SLES ones and the key is attached in the openSUSE-build-key from Micro 6.0. You could do zypper --releasever 6.0 openSUSE-build-key followed by for i in /usr/lib/rpm/gnupg/keys/gpg-pubkey*asc; do rpm --import $i || true done Similarly how we do it e.g. for toolbox https://build.opensuse.org/projects/openSUSE:Leap:Micro:6.0/packages/opensuse-toolbox-image/files/config.sh?expand=1