Comment # 4 on bug 956558 from Neil Brown

1/ rpc-svcgssd.service shouldn't try do start unless you have the file
   /etc/krb5.keytab.
   This is due to the line "ConditionPathExists=/etc/krb5.keytab" in 
     /usr/lib/systemd/system/rpc-svcgssd.service
   Do you have the file?  Do you want to have it?  Can you remove it?
   What then happens?

2/ Yes, we do need both rpc-gssd.service and rpc-svcgssd.service
   One works with the client side of the connection. one with the server side.
   As NFSv4.0 uses callbacks from the server to the client, the server
sometimes
   acts as a client and the client acts as a server.  So to support NFSv4.0
   we need to run both services on both the server and the client.

3/ While we probably should support gssproxy at some stage (thanks for the
   spec file) NFS should work properly with out it - using {svc,}gssd instead.
   What error messages are filling up the log files?