For openSUSE Tumbleweed and d l g run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:containers/openSUSE_Tumbleweed_and_d_l_g/Virtualization:containers.repo
zypper refresh
zypper install kompose
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:containers/openSUSE_Tumbleweed/Virtualization:containers.repo
zypper refresh
zypper install kompose
For openSUSE Leap 15.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:containers/openSUSE_Leap_15.2/Virtualization:containers.repo
zypper refresh
zypper install kompose