For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jkohoutek:libvirt-zfs/openSUSE_Tumbleweed/home:jkohoutek:libvirt-zfs.repo
zypper refresh
zypper install zfs
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jkohoutek:libvirt-zfs/16.0/home:jkohoutek:libvirt-zfs.repo
zypper refresh
zypper install zfs
For 15.7 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jkohoutek:libvirt-zfs/15.7/home:jkohoutek:libvirt-zfs.repo
zypper refresh
zypper install zfs
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:jkohoutek:libvirt-zfs/15.6/home:jkohoutek:libvirt-zfs.repo
zypper refresh
zypper install zfs