yarn from Virtualization:containers:Portus project
Select Your Operating System
Add repository and install manually
For CaaSP SLE 12 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Virtualization:containers:Portus/CaaSP_SLE_12_SP3/Virtualization:containers:Portus.repo zypper refresh zypper install yarn