RE: SNMP SET of sysLocation and sysContact

Hi Dave,

I am running a script to run my application upon boot-up.  My script contains the following:

================================
#!/bin/bash

export ZSNMPPATH=/zsnmp/sbin
export MIBDIRS=/zsnmp/share/snmp/mibs
export SNMPCONFPATH=/zsnmp/share/snmp:.
export ZSNMPCONFPATH=/zsnmp/share/snmp
export MIBS=+ZANDAR-ARM-MIB

./zsnmp_agent&
================================

The zsnmp_agent, which is my application (a subagent) calls via system call "/zsnmp/sbin/snmpd -x tcp:localhost:4030" to start snmpd.
This resets the syslocation/syscontact that was already saved in /var/net-snmp/snmpd.conf.  I find this weird.  When I just call "/zsnmp/sbin/snmpd -x tcp:localhost:4030", it doesn' affect my saved values.

Another solution that I was able to think of is setting the persistent file.  I added the line on my script "export SNMP_PERSISTENT_FILE=/zsnmp/share/snmpd.conf".  This solved my problem but the file get's bigger and bigger everytime I change syslocation and syscontact.  Is there a way to tell the agent to truncate the file instead before writing the new values.

Thanks!!!

Regards,
Ed


> Date: Tue, 13 Jul 2010 11:03:30 +0100
> Subject: Re: SNMP SET of sysLocation and sysContact
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> 
> On 13 July 2010 10:45, Doroubo Doroubo <[email protected]> wrote:
> > Yes, that's what I'm doing (killall snmpd).
> 
> What is the *exact* command you are running?
> 
> 
> >      How do you terminate properly?
> 
> What environment are you using?
>   ( It's impossible to tell you about the official command for
>     stopping or starting services, if you haven't given us any
>     information about operating system, distribution, etc.)
> 
> 
> > I tried snmp stop but when I check the running processes, I can see snmpd
> > running.
> 
> Well, under Fedora, the standard way to stop the agent would be
> 
>      service  snmpd   stop
> 
> (note "snmpd", rather than "snmp")
> Other distibutions may well use different commands.
I BELIEVE I AM USING DEBIAN.  RIGHT NOW, WHETHER I USE SNMP STOP/RESTART OR THE KILLALL METHOD TO SHUTDOWN MY AGENT,
IT GETS SAVED IN /VAR/NET-SNMP/SNMPD.CONF.  THIS MAYBE NOT AN ISSUE AT ALL.  
> 
> 
> 
> > I can see that /var/net-snmp/snmpd.conf updates everytime I set syslocation
> > and syscontact.  The problem now is when I restart the machine (power off
> > then power on).  The values in /var/net-snmp/snmpd.conf resets.
> 
> Hmmm....   that doesn't sound right.
> Something must be re-setting this file....
YES, IT WAS THE EXPORT PART ON MY SCRIPT, THEN CALLING "/zsnmp/sbin/snmpd -x tcp:localhost:4030" RESETS MY SAVED VALUES IN /VAR/NET-SNMP/SNMPD.CONF.

> 
> That's probably what is causing your problems.
> But it's worth verifying this:
> 
>    run the agent
>    change the location/contact values
>    run GET on these, to check it has the new values
>    shut down the agent  (but don't power off)
>    restart the agent
>    run GET on location/contact
> 
> what values do you get?
> The default ones, or your new versions?
> 
> 
> Dave
 		 	   		  
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