For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dfaggioli:devel:Virtualization/openSUSE_Tumbleweed/home:dfaggioli:devel:Virtualization.repo
zypper refresh
zypper install crun
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dfaggioli:devel:Virtualization/openSUSE_Slowroll/home:dfaggioli:devel:Virtualization.repo
zypper refresh
zypper install crun
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:dfaggioli:devel:Virtualization/15.6/home:dfaggioli:devel:Virtualization.repo
zypper refresh
zypper install crun