For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:Stable/openSUSE_Factory/network:ha-clustering:Stable.repo
zypper refresh
zypper install crmsh
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:Stable/15.6/network:ha-clustering:Stable.repo
zypper refresh
zypper install crmsh
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/network:ha-clustering:Stable/15.5/network:ha-clustering:Stable.repo
zypper refresh
zypper install crmsh