Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/security:logging/openSUSE_Tumbleweed/security:logging.repo
zypper refresh
zypper install loki
Para 16.0 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/security:logging/16.0/security:logging.repo
zypper refresh
zypper install loki
Para 15.4 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/security:logging/15.4/security:logging.repo
zypper refresh
zypper install loki