For openSUSE Leap 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:erlang/openSUSE_Leap_15.3/devel:languages:erlang.repo
zypper refresh
zypper install rabbitmq-server
For SLE 15 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:erlang/SLE_15_SP3/devel:languages:erlang.repo
zypper refresh
zypper install rabbitmq-server
For SLE 15 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:erlang/SLE_15/devel:languages:erlang.repo
zypper refresh
zypper install rabbitmq-server
For SLE 12 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:erlang/SLE_12/devel:languages:erlang.repo
zypper refresh
zypper install rabbitmq-server