[CentOS] NFS help

[Matt Garman]

On Mon, Oct 24, 2016 at 6:09 PM, Larry Martell <larry.martell at gmail.com> wrote:
> The machines are on a local network. I access them with putty from a
> windows machine, but I have to be at the site to do that.

So that means when you are offsite there is no way to access either
machine?  Does anyone have a means to access these machines from
offsite?

> Yes, the C6 instance is running on the C7 machine. What could be
> mis-configured? What would I check to find out?

OK, so these two machines are actually the same physical hardware, correct?

Do you know, is the networking between the two machines "soft", as in
done locally on the machine (typically through NAT or briding)?  Or is
it "hard", in that you have a dedicated NIC for the host and a
separate dedicated NIC for the guest, and actual cables going out of
each interface and connected to a switch/hub/router?  I would expect
the former...

If it truly is a "soft" network between the machines, then that is
more evidence of a configuration error.  Now, unfortunately, with what
to look for: I have virtually no experience setting up C6 guests on a
C7 host; at least not enough to help you troubleshoot the issue.  But
in general, you should be able to hit up a web search and look for
howtos and other documents on setting up networking between a C7 host
and its guests.  That will allow you to (1) understand how it's
currently setup, (2) verify if there is any misconfig, and (3) correct
or change if needed.

> Yes, that is potential solution I had not thought of. The issue with
> this is that we have the same system installed at many, many sites,
> and they all work fine. It is only this site that is having an issue.
> We really do not want to have different SW running at just this one
> site. Running the script on the C7 host is a change, but at least it
> will be the same software as every place else.

IIRC, you said this is the only C7 instance?  That would mean it is
already not the same as every other site.  It may be conceptually the
same, but "under the hood", there are a tremendous number of changes
between C6 and C7.  Effectively every single package is different,
from the kernel all the way to trivial userspace tools.

> netperf is not installed.

Again, if you can use putty (which is ssh) to access these systems,
you implicitly have the ability to upload files (i.e. packages) to the
systems.  A simple tool like netperf should have few (if any)
dependencies, so you don't have to mess with mirroring the whole
centos repo.  Just grab the netperf rpm file from wherever, then use
scp (I believe it's called pscp when part of the Putty package) to
copy to your servers, yum install and start testing.