For SLE 15 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:steffens:lvermgeo:server/SLE_15/home:steffens:lvermgeo:server.repo
zypper refresh
zypper install drbd-utils
For SLE 12 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:steffens:lvermgeo:server/SLE_12_SP3/home:steffens:lvermgeo:server.repo
zypper refresh
zypper install drbd-utils
For SLE 12 SP1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:steffens:lvermgeo:server/SLE_12_SP1/home:steffens:lvermgeo:server.repo
zypper refresh
zypper install drbd-utils