Re: odd inconsistency with nfs

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----- Original Message -----
| I'm having an interesting/odd problem with nfs (I think). We recently
| (Monday/Tuesday) upgraded our file server from an ancient redhat 7.3
| system to a shiny new centos 6.4 system. We don't see any issues
| between
| the other centos boxes, but things get a bit weird when we start
| mounting on the old solaris clients.
| 
| The initial symptom was that the 'tab complete' wasn't working, and
| then
| we noticed that typing 'ls *' in the mounted directory was bombing. I
| tried forcing the mounting back to nfs3 but it's not consistent. I've
| set up two boxes as servers and one of the solaris boxes is my
| client.
| Each server has two shares that are mounted on the client. Of those
| four, one of them works properly and the other three do not. I've
| spent
| most of the day trying to debug this and I cannot for the life of me
| tell why one share works and the rest don't. Nothing seems to be
| special
| about that share versus the rest.
| 
| Here are notes on how things are set up.
| 
|     on duke: (nis server)
|        vi /etc/ypfiles/automap
|           scrs1_bolt    -soft,intr,retrans=1 boltzmann:/scrs1_bolt
|           summit_bolt   -soft,intr,retrans=1 boltzmann:/summit_bolt
|           scrs1.mirror  -soft,intr,retrans=1 goblin:/scrs1.mirror
|           summit.mirror -soft,intr,retrans=1 goblin:/summit.mirror
|        ( cd /var/yp ; make )
| 
|     on boltzmann: (nfs server)
|        df -h
|           Filesystem            Size  Used Avail Use% Mounted on
|           /dev/sdb2              50G   13G   37G  26% /
|           tmpfs                 3.9G  1.2M  3.9G   1% /dev/shm
|           /dev/sdb3             177G  188M  175G   1% /aux
|           /dev/sda3             208G   44G  164G  21% /aux2
|        mkdir /aux/scrs1_bolt
|        mkdir /aux2/summit_bolt
|        ln -s /aux/scrs1_bolt /scrs1_bolt
|        ln -s /aux2/summit_bolt /summit_bolt
|        chmod 777 /aux/scrs1_bolt /aux2/summit_bolt
|        service nfs restart
|        vi /etc/exports
|           /scrs1_bolt
|           xxx.xxx.xxx.0/24(rw,no_root_squash,sync,insecure)
|           /summit_bolt
|           xxx.xxx.xxx.0/24(rw,no_root_squash,sync,insecure)
|        exportfs -rv
| 
|     on bigdog: (client)
|        mkdir /tmp/test/b1 /tmp/test/b2 /tmp/test/g1 /tmp/test/g2
|        touch /tmp/test/b1/nothing_is_mounted
| /tmp/test/b2/nothing_is_mounted /tmp/test/g1/nothing_is_mounted
| /tmp/test/g2/nothing_is_mounted
|        mount -F nfs -o nfsvers=3 boltzmann:/summit_bolt /tmp/test/b1
|        mount -F nfs -o nfsvers=3 boltzmann:/scrs1_bolt /tmp/test/b2
|        mount -F nfs -o nfsvers=3 goblin:/summit.mirror /tmp/test/g1
|        mount -F nfs -o nfsvers=3 goblin:/scrs1.mirror /tmp/test/g2
|        ls -l /tmp/test/*
|           -rw-r--r--   1 root     other          0 Jul  3 14:39
| /tmp/test/nothing_is_mounted
| 
|           /tmp/test/b1:
|           total 24
|           -rw-r--r--   1 root     other          0 Jul  3 12:32
|           SUMMIT_BOLT
|           -rw-r--r--   1 root     other          0 Jul  3 09:26
| boltzmann_test_summit
| 
|           /tmp/test/b2:
|           total 32
|           -rw-r--r--   1 root     other          0 Jul  3 12:31
|           SCRS1_BOLT
|           -rw-r--r--   1 root     other          0 Jul  3 09:26
| boltzmann_test_scrs1
| 
|           /tmp/test/g1:
|           total 280
|           -rw-r--r--   1 root     other          0 Jul  3 15:40
| .00_summit_nas_volume
|           -rw-rw-r--   1 root     other          0 Jul  3 15:03
| SUMMIT_MIRROR
| 
|           /tmp/test/g2:
|           total 120
|           -rw-r--r--   1 root     other          0 Jul  3 15:40
| .00_scrs1_nas_volume
|           -rw-rw-r--   1 root     other          0 Jul  3 15:02
|           SCRS1_MIRROR
| 
|        ls -la /tmp/test/b1/*
|           -rw-r--r--   1 root     other          0 Jul  3 12:32
| /tmp/test/b1/SUMMIT_BOLT
|           -rw-r--r--   1 root     other          0 Jul  3 09:26
| /tmp/test/b1/boltzmann_test_summit
| 
|        ls -l /tmp/test/b2/*
|           ls: No match.
| 
|        ls -l /tmp/test/g1/*
|           ls: No match.
| 
|        ls -l /tmp/test/g2/*
|           ls: No match.
| 
|        mount
|           /tmp/test/b1 on boltzmann:/summit_bolt read/write/remote on
| Wed Jul  3 15:41:11 2013
|           /tmp/test/b2 on boltzmann:/scrs1_bolt read/write/remote on
|           Wed
| Jul  3 15:41:11 2013
|           /tmp/test/g1 on goblin:/summit.mirror read/write/remote on
|           Wed
| Jul  3 15:41:11 2013
|           /tmp/test/g2 on goblin:/scrs1.mirror read/write/remote on
|           Wed
| Jul  3 15:41:11 2013
| 
|        umount -a /tmp/test/b1 /tmp/test/b2 /tmp/test/g1 /tmp/test/g2
| 
| If I use automount to access the shares on the client, the mounts are
| made by default with nfs4 and we see this same 'no match' behaviour.
| It's probably something really stupid but I'm just not seeing it...
| 
| If anyone has ideas and/or needs more info, please let me know.
| 
| --
| Thanks!
| Miranda


in our automounts we specified vers=3 as an option which consistently mounted with NFSv3.  You may also wish to check out /etc/sysconfig/nfs and see if there are any inconsistencies there between the working and non-working servers.  Note, you can specify the NFS version there too ;)

-- 
James A. Peltier
Manager, IT Services - Research Computing Group
Simon Fraser University - Burnaby Campus
Phone   : 778-782-6573
Fax     : 778-782-3045
E-Mail  : jpeltier@xxxxxx
Website : http://www.sfu.ca/itservices

“A successful person is one who can lay a solid foundation from the bricks others have thrown at them.” -David Brinkley via Luke Shaw
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