new2xen at gmail
Feb 25, 2008, 4:34 PM
Post #1 of 3
PXE client is root squashing ...
Though the question is NFS-related, it is in conjunction with the PXE booting.
- PXE/DHCP/NFS and tFTP server running CentOS51 and is configured per
PXE/Syslinux and RHEL diskless workstation documentation.
1. Attempt to test ability for client to PXE boot over the network
and run Root-NFS
2. NFS export in the PXE server is:
# NFS Export Files for qatest1 host
Note - We want the client to mount the export - with "no_root_squash"
.. it is for a test environment hence we would like to have the client
root possess effective ROOT permission.
3. Client boots successfully via PXE and mounts the Root FS; however.
Problem: The diskless client did not seem to mount the export with
"no_root_squash" option. Whenever I touch a file, it assigns the file
as user nobody; I noticed this because of boot-up errors stating
inability to write to various /var log files.
In further troubleshooting, I noticed the following in the cat
/etc/proc/mounts (while comparing to manually mounting an NFS export
in the command line while within the diskless client prompt:
# cat nfsmounts2.txt
rootfs / rootfs rw 0 0
/dev/root / nfs
** the above reflects configuration for my root-nfs mounted FS; the
following below reflects configuration of an NFS client mount
performed manually by myself within the diskless client - after
188.8.131.52:/tftpboot /mnt/test nfs
1. When I manually mounted the client to "/mnt/test" - the
"no_root_squash" parameter was enabled. I am able to perform tasks as
2. However, my Root-NFS client mount does not.
Question: - Where can I change the default NFS client options within
PXE configuration? I attempted to pass various parameters in the
/pxelinux.cfg/default file - in the APPEND line - to test whether I
can send NFS options through this file, and I am unable to. I tried
to change NFS version to force it to run NFS version 3, I tried to
change sec=sys (as opposed to what seems to be a default parameter it
passes on - sec=null -)
Can some please shed some light and be so kind to advise on how the
NFS client is mounting in PXElinux when it attempts to mount the
thank you in advance.
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