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I installed a fresh version of OpenSUSE Leap 15.4 RC, and tried to mount
kerberized nfs mounts.
After configuring the mount in the yast2 nfs-client module, it fails to mount.
The documentation gives the hint to execute
systemctl start rpc-gssd.service
after which the mount succeeds.
However, this does not survive a reboot, rpc.gssd does not get startet.
systemctl enable rpc-gssd.service fails.

The only workaround I found was to install the nfs-server component as well,
and to start the nfs kernel server with no exports. This actually brings up
rpc.gssd, and mounts succeed.

Please fix.


Reproducible: Always

Steps to Reproduce:
1. Setup kerberized NFS server
2. install fresh version of OpenSUSE Leap 15.4
3. install yast2-nfs-client + dependencies, but not nfs-kernel-server
4. configure the GSS-secured mount in yast2 nfs-client module

Actual Results:  
mount fails with error message 
mount.nfs: an incorrect mount option was specified

Expected Results:  
mount succeeds

When manually starting rpc.gssd by
systemctl start rpc-gssd.service,
and mounting afterwards, the mount succeeds. After a reboot, rpc-gssd.service
is again not running, and mount fails.