For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dheidler/openSUSE_Tumbleweed/home:dheidler.repo
zypper refresh
zypper install zfs
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dheidler/openSUSE_Factory_ARM/home:dheidler.repo
zypper refresh
zypper install zfs
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dheidler/16.0/home:dheidler.repo
zypper refresh
zypper install zfs
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dheidler/15.6/home:dheidler.repo
zypper refresh
zypper install zfs