NFS Mounting on Penn Desktops

To set this up correctly, you need to modify files on both the server and the client machines.

Server Modifications

First, you need to mount the disk locally. You can do this by adding it to /etc/fstab, so it's automatically mounted at boot time. You'll need to manually create the directory it maps to, as root. Here's an example from pc-penn-d-02 :

# This file is edited by fstab-sync - see 'man fstab-sync' for details
/dev/VolGroup00/LogVol00 /                       ext3    defaults        1 1
LABEL=/boot             /boot                   ext3    defaults        1 2
/dev/VolGroup01/LogVol00 /data                   ext3    defaults        1 2
none                    /dev/pts                devpts  gid=5,mode=620  0 0
none                    /dev/shm                tmpfs   defaults        0 0
none                    /proc                   proc    defaults        0 0
/dev/VolGroup00/LogVol02 /scratch                ext3    defaults        1 2
none                    /sys                    sysfs   defaults        0 0
/dev/VolGroup00/LogVol01 swap                    swap    defaults        0 0
/dev/VolGroup02/LogVol00 /exports/project/data_d02_1 ext3    defaults        1 2
/dev/VolGroup03/LogVol00 /exports/project/data_d02_2 ext3    defaults        1 2
/dev/VolGroup04/LogVol00 /exports/project/data_d02_3 ext3    defaults        1 2

To mount something without rebooting, you can run the mount command as root, like:

mount /exports/project/data_d02_1

Then you also need to put the directory in /etc/exports to export it, and list which machines have permission to see it. Example:

#
/exports/project/data_d02_1        pc-penn-s-01.cern.ch(rw,sync)
/exports/project/data_d02_1        pc-penn-d-01.cern.ch(rw,sync)
/exports/project/data_d02_1        pc-penn-d-02.cern.ch(rw,sync)
/exports/project/data_d02_1        pc-penn-d-03.cern.ch(rw,sync)
/exports/project/data_d02_1        pc-penn-d-04.cern.ch(rw,sync)
/exports/project/data_d02_1        pc-penn-d-05.cern.ch(rw,sync)
/exports/project/data_d02_1        pc-penn-d-06.cern.ch(rw,sync)

Afterward, you need to reload the export table for nfs:

/etc/init.d/nfs reload

You may also need to modify /etc/sysconfig/iptables to look like the one from d02, to set up the firewall correctly. If that's the case, then you should also do the following:

• Restart iptables:
  • /etc/init.d/iptables restart
• And make sure the nfs daemons are started (possibly will need restarted):
  • service portmap start
  • service nfslock start
  • service nfs start

Client Modifications

The Penn machines are set up to automount the shared directories. So instead of putting them in /etc/fstab, you instead create entries in /etc/auto.project. This file gives a list of directories to automount to /project on demand. So you need to cd to these directories to actually mount them. The first time you do this, it may take a long time (minutes!) to mount.

The base directory, /project, should probably already exist (or you can create it as root). But you don't need to (and can't) create empty directories for the mount points. These are created automatically on demand.

Here's an example of the /etc/auto.project file from pc-penn-d-01 :

#
# $Id: PennNfsMounting.txt,v 1.4 2020/08/19 07:26:13 BaseUserMapping_333 Exp $
#
# This is an automounter map and it has the following format
# key [ -mount-options-separated-by-comma ] location
# Details may be found in the autofs(5) manpage

data0           pc-penn-s-01.cern.ch:/exports/project/&
data_d02_1      pc-penn-d-02.cern.ch:/exports/project/&
data_d02_2      pc-penn-d-02.cern.ch:/exports/project/&
data_d02_3      pc-penn-d-02.cern.ch:/exports/project/&

Then you may need to load the new info for autofs:

/etc/init.d/autofs reload

More Info

This page has some useful info:
http://www.redhat.com/docs/manuals/linux/RHL-9-Manual/ref-guide/ch-nfs.html

-- DominickOlivito - 07-May-2010