For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:monitoring/openSUSE_Tumbleweed/devel:openQA:monitoring.repo
zypper refresh
zypper install loki
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:monitoring/15.6/devel:openQA:monitoring.repo
zypper refresh
zypper install loki
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:openQA:monitoring/15.5/devel:openQA:monitoring.repo
zypper refresh
zypper install loki