SUMMARY: NFS automount problems

Thanks to James Sainsbury and Ric Werme for their suggestions.  In the
end, because automount maps did work, that was the direction we took.
Still seems like the original problem is a bug, though :(

James suggested an NFS version mismatch and trying to force the mount to
use NFS version 3, and also the use of direct/indirect maps. =20

Ric suggested doing tcpdumps against the mount operations, which I
didn't actually get around to investigating, and also turning up the
verbosity on the automount command, which didn't yield any useful
information.

---
Eric


-----Original Message-----
> We have a few older Tru64/Digital Unix 4.0F clients (needed for
support
> reasons - 5.1B clients work fine) on our network that are having some
> issues connecting to newer Linux NFS fileservers.  Up until this
point,
> we've just been pointing them to older servers for their needs, but
> we're coming under pressure to remove the legacy fileservers and the
> problem has reared its ugly head again.  Hoping someone here has some
> insight.  Thanks all!
>
> Please direct replies to [email protected]; I will summarize and
> post solutions to the list.
>
> Problem:
> v4.0F and below can't correctly automount NFS shares on newer Linux
> servers.  Manual mounts work fine.
>
> Steps to reproduce:
> Set up a new Linux NFS server, share a directory via /etc/exports.
Try
> mounting said share on a Tru64 4.0F or older machine using automount.
>
> Details:
> This problem seems to coincide with Linux kernels 2.6 and above; this
> may be just a correlation with newer versions of nfs-utils.
>
>
>
------------------------------------------------------------------------
> ----------------
>
> Client (Tru64) info:
> Digital UNIX V4.0F  (Rev. 1229); Tue Jan 29 10:15:07 EST 2002
> Patch Kits: DUV40FAS0006-20010620 OSF440 and DUV40FB22AS0008-20030730
> OSF440 (different clients, same result)
>
>> grep -i auto /etc/rc.config
> AUTOMOUNT=3D"1"
> export AUTOMOUNT
> AUTOMOUNT_ARGS=3D"-M /.automount /net -hosts"
> export AUTOMOUNT_ARGS
>
>> showmount -e bengsh01
> Exports list on bengsh01:
> /users                              *
> /data                               *
>
>> cd /net/bengsh01/data
> /net/bengsh01/data: No such file or directory.
>
>> mount bengsh01:/data /mnt; mount | grep bengsh01
> bengsh01:/data on /mnt type nfs (v3, rw, udp, hard, intr)
>
>> cd /mnt; ls -al
> total 50
> drwxr-xr-x   3 root     system      4096 Sep 28 09:30 .
> drwxr-xr-x  37 root     system      2048 Jul 20 10:38 ..
> -rw-------   1 root     system      6144 Sep 28 09:30 aquota.group
> -rw-------   1 root     system      6144 Sep 28 09:30 aquota.user
> drwx------   2 root     system     16384 Sep 28 07:53 lost+found
> -rw-r--r--   1 root     system         0 Sep 28 09:48 test
>
>> cd /net/fry/riss; ls -al
> total 97
> dr-xr-xr-x  21 root     system      4096 Jul 27 15:23 .
> dr-xr-xr-x   3 root     system       512 May  2 11:20 ..
> drwx------   4 root     system      4096 Jul 22 13:47 .Trash-0
> drwx--S---   4 1000     csm_cm      4096 May 11 17:42 .Trash-1000
> drwx--S---   2 root     csm_cm      4096 Jun 22 15:40 .Trash-root
> drwxrwsr-x   3 proulst  swcm        4096 Mar 31  2008 act
> drwxr-xr-x   2 root     system      4096 Jul 27 15:23 archive_home
> drwxrwxr-x  13 proulst  swcm        4096 Mar  3  2010 cm
> -rwxr--r--   1 root     system      1685 May 14 15:27 daily.check
> drwxrwxr-x  14 root     riss        4096 May 19 10:46 devel
> dr-xr-xr-x   3 proulst  swcm        4096 Dec  4  2008 eoss
>
>> mount | grep fry
> fry:/riss on /.automount/net/fry/riss type nfs (v3, rw, udp, hard,
intr)
>
>
>
------------------------------------------------------------------------
> ----------------
>
> Non-working server info:
> bengsh01:~> uname -a; cat /etc/redhat-release; rpm -qa | grep nfs
> Linux bengsh01.amherst.com 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:39
EDT
> 2010 x86_64 x86_64 x86_64 GNU/Linux
> Red Hat Enterprise Linux Server release 5.5 (Tikanga)
> nfs-utils-lib-1.0.8-7.6.el5
> nfs-utils-1.0.9-44.el5
>
> bengsh01:~> cat /etc/exports
> /data   *(rw,sync,no_root_squash)
> /users   *(rw,sync,no_root_squash)
>
> No log messages pertaining to server access from the automount
requests
> that fail - it's like it never makes it that far.  I do see log
messages
> for the manual mount.
>
>
------------------------------------------------------------------------
> ----------------
>
>
> Working server info:
> fry:/> uname -a; cat /etc/redhat-release; rpm -qa | grep nfs
> Linux fry 2.4.27 #4 Wed Oct 6 17:29:46 EDT 2004 i686 i686 i386
GNU/Linux
>
> Red Hat Linux release 9 (Shrike)
> nfs-utils-1.0.1-2.9
>
> fry:/> cat /etc/exports
> /riss   (rw,sync,no_root_squash)

--=20
Eric