[CentOS] nfs4, idmapd, users with same name, different uid?

Wed Aug 28 16:04:38 UTC 2013
Barbara Krasovec <barbarak at arnes.si>

On 8/28/13 11:29 AM, natxo asenjo wrote:
> On 08/27/2013 12:01 AM, Les Mikesell wrote:
>> Is idmapd supposed to work where users have different uid numbers on
>> the nfsv4 server and client?     It seems to show the right names for
>> ownership on the client side, but if I automount a home directory,
>> that user doesn't have permission to enter it, and if I change
>> permission to allow access and create a new file, it shows on the
>> server as owned by the uid number for the user on the client (and
>> wrong on the server).
>> Everything works like it would on nfs v3  where the uid numbers are
>> the same on the client and server, but what's the point of the
>> rpcidmapd daemon if it doesn't actually map the ids?
> for nfsv4 it is my understanding you need a central user store like ldap
> or nis (but don't use nis) or synchronize your password file to
> eternity. I do not have a centos nfs server (or a linux one, for that
> matter, what I want from nfsv4 are mainly the extended acls and those
> are not there until somebody wakes up and merges the richacl patch into
> the mainstream kernel), only clients, but they work fine using nfsv4 to
> both netapp  as zfs (omnios) filers.
> Both the clients as the filers are configured to lookup up users in ldap
> (ipa in our case).
> I have no experience with idmapd in linux, but in solaris and netapp it
> gets ugly quite easily :-)
It also works with same UID-s on server/client, just setting the 
domainname in idmapd.conf. Ldap is not obligatory.
Cheers, Barbara