For openSUSE Leap 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon/openSUSE_Leap_15.4/home:interstar001:Centreon.repo
zypper refresh
zypper install rrdtool-cached
For SLE 15 SP1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon/SLE_15_SP1/home:interstar001:Centreon.repo
zypper refresh
zypper install rrdtool-cached
For SLE 15 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon/SLE_15/home:interstar001:Centreon.repo
zypper refresh
zypper install rrdtool-cached
For SLE 12 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:interstar001:Centreon/SLE_12_SP4/home:interstar001:Centreon.repo
zypper refresh
zypper install rrdtool-cached