[Lustre-discuss] NFS problem after upgrade to 1.8.3

Tina Friedrich Tina.Friedrich at diamond.ac.uk
Fri Nov 12 03:26:17 PST 2010


Hello List,

we re-export the file system via NFS for a couple of things. All the 
re-exporters are Red Hat 5.5 servers running kernel 2.6.18-194.17.1.el5 
(patchless clients).

We upgraded our Lustre system from 1.6.7 to 1.8.3.ddn3.3 last week. That 
seems to have introduced a problem. Since this upgrade, some of our NFS 
clients can't mount the file system any more. They get a permission 
denied error. Others can mount the same file system just fine. The 
difference appears to be that the clients that can't mount it try to use 
mountd version 1.

Some investigation exposed the following behaviour:

[root at pc030 ~]# mount -o udp -o mountvers=1 
cs04r-sc-com99-01:/mnt/play01/tmp/tina/mounttest/ /tmp/mnttest/
[root at pc030 ~]# ls -l /tmp/mnttest/
total 0
?--------- ? ? ? ?            ? realdir

I.e. when I use mountvers=1 I get this weird 'broken link' type entry (I 
get the 'permission denied' error if I try to mount anything below 
'realdir' in this example).

Whereas when using mountvers=3:

[root at pc030 ~]# mount -o udp -o mountvers=3 
cs04r-sc-com99-01:/mnt/play01/tmp/tina/mounttest/ /tmp/mnttest/
[root at pc030 ~]# ls -l /tmp/mnttest/
total 4
drwxrwxr-x 3 root root 4096 Nov 12 10:04 realdir

all is as it should be.

This is only when NFS exporting our Lustre file system; when exporting a 
local file system instead all versions of mountd work fine.

Anyone seen this before? Any ideas? Unfortunately the systems using the 
mountd version 1 are an embedded box so I'm not sure the way they mount 
can be changed.

-- 
Tina Friedrich, Computer Systems Administrator, Diamond Light Source Ltd
Diamond House, Harwell Science and Innovation Campus - 01235 77 8442

-- 
This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail.
Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. 
Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message.
Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
 






More information about the lustre-discuss mailing list