For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:beyerle:IAC/openSUSE_Tumbleweed/home:beyerle:IAC.repo
zypper refresh
zypper install eccodes
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:beyerle:IAC/openSUSE_Factory/home:beyerle:IAC.repo
zypper refresh
zypper install eccodes
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:beyerle:IAC/15.6/home:beyerle:IAC.repo
zypper refresh
zypper install eccodes
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:beyerle:IAC/15.5/home:beyerle:IAC.repo
zypper refresh
zypper install eccodes