[Samba] Samba and kerberized NFSv4

[Matthias Kahle]

Hi Folks

I'm trying to share user home directories hosted on a Samba-4 member
server via NFSv4. Everything's working well with the Windows shares but
when it comes to kerberized  NFSv4 it fails. I can't even mount the home
root directory via nfs on the server itself ("mount.nfsv4: access denied
by server while mounting ...").

As far as I have tracked it down, it appears to me that the server's is
searching in its database for a userPrincipalName=nfs/server.dom.tld
while I have added a servicePrincipalNamenfs/server.dom.tld with the
samba-tool. Due to this neither the server is getting a TGT nor the
client a TGS ...

Am I doing anything wrong? Is that beahaviour intentional?

Version affacted is samba 4.2.10 from the official debian 8 repositories
(on DCs and the member server).

Kind regards,
Matthias