An interesting NFS mounting problem

[Richard Riley]

> -----Original Message-----
> From: redhat-sysadmin-list-bounces at redhat.com [mailto:redhat-
> sysadmin-list-bounces at redhat.com] On Behalf Of Zhou, Jingchen
> Sent: Wednesday, October 10, 2007 2:02 PM
> To: redhat-sysadmin-list at redhat.com
> Subject: RE: An interesting NFS mounting problem
> 
> I think this has something to do with iptables. I just don't know
> how to fix this problem. What is funny is that some clients on the
> same network work, while others (e.g. nfsclient1) don't. Even for
> nfsclients1, I notice sometime it can mount /u1, /usr/local, but not
> /home at boot time. Of course, if I do "mount -a" from command line,
> all gets mounted. By the way, all the clients are configured the
> same way. This NFS problem appears to be very random.

If you had a problem with iptables, you would not be able to mount via
NFS at any time.
Since the amount of information you have provided is limited, here is
one important place to check.  Look at /etc/rc.d/rc3.d directory
(assuming run level 3, if different run level replace 3 with that
level).  The file name convention here S??service where S indicates a
startup script, ?? is the sequence number (smallest is started first)
and "service" is the name of the service to start.  Be sure that the
number associated with the netfs service is larger than "network" and
"portmap".  The key is that other necessary services required to support
NFS are already started before the "netfs" service attempts to start.
[Richard Riley] 

> Any clue is appreciated.
> 
> ________________________________
> 
> From: redhat-sysadmin-list-bounces at redhat.com on behalf of Matthew
> Snyder
> Sent: Tue 10/9/2007 6:09 PM
> To: redhat-sysadmin-list at redhat.com
> Subject: Re: An interesting NFS mounting problem
> 
> 
> 
> Zhou, Jingchen wrote:
> > I am having a problem to mount a NFS volume /home (exported by a
> RHEL4 server nfs0) on a NFS client which is also RHEL4.
> >
> > The server (nfs0) is configured as such
> > $ cat /etc/exports
> > /home nfsclient1(rw)
> >
> > and the client (nfsclient1) as such:
> > #cat /etc/fstab
> > nfs0:/home            /home           nfs     defaults        0 0
> >
> > When the client boots up, I get the following error message:
> >
> > "Mounting NFS filesystems: mount: mount to NFS server 'nfs0'
> failed: System Error: No route to host."
> >
> > However, I have no problem to ping the server (nfs0) from
> nfsclient1 and I also can mount /home manually via e.g. "mount
> /home" from command line.
> >
> > Am I missing any?
> >
> > Thanks,
> > JC
> >
> >
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> 
> Is it trying to mount /home before networking is started during
> boot?
> 
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