NFSv4 mount maps permissions for users and groups to nobody

This document (7021120) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)
SUSE Linux Enterprise Server 12 Service Pack 2 (SLES 12 SP2)

Situation

File permissions on a single NFSv4 client share are mapped to nobody:nobody while the correct user and group exists locally:

[...]
       11      20 drwxrwsr-x 2 nobody nobody      16384 Nov 15 2012 lost+found
148996097   91248 drwxrwsr-x 5 nobody nobody   93335552 Jul 11 18:40 Statements
    32769   86308 drwxrwsr-x 5 nobody nobody   88281088 Jun 8 00:19 Statements_Original
34177025       4 drwxrwsr-x 2 nobody nobody       4096 Jan 29 2015 TEST
35012609       4 drwxrwsr-x 2 nobody nobody       4096 Feb 28 19:43 upload
[...]

In /var/log/messages the following error is displayed:

Jul 15 02:27:54 linux nfsidmap[14274]: nss_getpwnam: name '<$USERNAME>' not found in domain 'localdomain'

The access permissions on other hosts mounting the share show the regular username and group.

Resolution

Please check the settings in /etc/idmapd.conf on all involved systems to ensure all settings are the same. If this is the case, please run

nfsidmap -c

to clear the cache of the nfsidmap daemon running with the NFS client.

Cause

Possible reasons for this behavior are a configuration mismatch or problems with the cached nfsidmap data on the NFS client.

Additional Information

TID 7005060 - NFS4 mount shows all ownership as "nobody" or 4294967294

Disclaimer

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