problems using check_snmp to monitor sendmail

[Daniel Finn]

The way our mail app is setup we do need sendmail to listen on localhost:25
and only there.  We've considered allowing the nagios server access to port
25 on each machine but it would mean tweaking the sendmail config on 50+
servers.  At this point for ease of management it's much easier to have
every server run the same sendmail.cf.

-----Original Message-----
From: Carroll, Jim P [Contractor] [mailto:jcarro10 at sprintspectrum.com]
Sent: Thursday, March 06, 2003 12:44 PM
To: 'Daniel Finn'; 'nagios-users at lists.sourceforge.net'
Subject: RE: [Nagios-users] problems using check_snmp to monitor
sendmail


I can't comment on the SNMP approach, but I'm curious:  Do you need to have
sendmail listening on socket 127.0.0.1:25?  I usually disable the listen
functionality of sendmail for outbound-only hosts.  Alternatively, if you're
going to have sendmail listen on port 25 at all, you could permit
connections from your Nagios server.  (I know, it would mean tweaking all
the hosts that you're interested in monitoring....)

Food for thought.

jc


> -----Original Message-----
> From: Daniel Finn [mailto:DFinn at studentadvantage.com]
> Sent: Thursday, March 06, 2003 10:42 AM
> To: 'nagios-users at lists.sourceforge.net'
> Subject: [Nagios-users] problems using check_snmp to monitor sendmail
> 
> 
> I'm having issues trying to implement check_snmp to monitor 
> the status of
> sendmail.  Your first question is why am I not just using 
> check_smtp, it's
> because all the mail servers that I need to implement this on 
> only listen on
> 127.0.0.1:25.
> 
> I've enabled the MIB or OID in snmpd.conf on the test box and 
> that appears
> to be working fine:
> 
> [root at sadqalx38 plugins]# snmpwalk -v 1 l52m-be sapublic 
> .1.3.6.1.4.1.2021.2
> 
> enterprises.ucdavis.prTable.prEntry.prIndex.1 = 1
> enterprises.ucdavis.prTable.prEntry.prNames.1 = sendmail
> enterprises.ucdavis.prTable.prEntry.prMin.1 = 1
> enterprises.ucdavis.prTable.prEntry.prMax.1 = 10
> enterprises.ucdavis.prTable.prEntry.prCount.1 = 2
> enterprises.ucdavis.prTable.prEntry.prErrorFlag.1 = 0
> enterprises.ucdavis.prTable.prEntry.prErrMessage.1 = 
> enterprises.ucdavis.prTable.prEntry.prErrFix.1 = 0
> enterprises.ucdavis.prTable.prEntry.prErrFixCmd.1 = 
> 
> [root at sadqalx38 plugins]# snmpwalk -v 1 -On l52m-be sapublic
> .1.3.6.1.4.1.2021.2
> .1.3.6.1.4.1.2021.2.1.1.1 = 1
> .1.3.6.1.4.1.2021.2.1.2.1 = sendmail
> .1.3.6.1.4.1.2021.2.1.3.1 = 1
> .1.3.6.1.4.1.2021.2.1.4.1 = 10
> .1.3.6.1.4.1.2021.2.1.5.1 = 3
> .1.3.6.1.4.1.2021.2.1.100.1 = 0
> .1.3.6.1.4.1.2021.2.1.101.1 = 
> .1.3.6.1.4.1.2021.2.1.102.1 = 0
> .1.3.6.1.4.1.2021.2.1.103.1 = 
> 
> 
> So, it appears I can either monitor
> enterprises.ucdavis.prTable.prEntry.prCount.1 which lists the 
> number of
> sendmail processes running or
> enterprises.ucdavis.prTable.prEntry.prErrorFlag.1 which is 0 
> when sendmail
> is running or 1 when it's either not running or there are 
> more procs running
> than what you've specified acceptible (10 in this case).
> 
> 
> Here's the problem I'm having with the snmp_check program.  It always
> reports back that it's either at a WARNING state or a CRITICAL state.
> 
> [root at sadqalx38 plugins]# ./check_snmp -H 10.209.68.92 -o
> .1.3.6.1.4.1.2021.2.1.5.1 -w '1:10' -c '1:10' -C sapublic
> SNMP WARNING - 1
> 
> 
> Am I doing something wrong.  Shouldn't it return OK because 
> the value it's
> returning is between 1 and 10?  Now if I change the warning 
> and critical
> threshholds to be outside of what it's returning I get :
> 
> [root at sadqalx38 plugins]# ./check_snmp -H 10.209.68.92 -o
> .1.3.6.1.4.1.2021.2.1.5.1 -w '3:10' -c '3:10' -C sapublic
> SNMP CRITICAL - *1*
> 
> I've downloaded nagios-plugins-1.3.0.tar.gz and compiled them for this
> system and I still have the same problem.  If anyone could 
> help that would
> be great.  Also, I'm not subscribed to this list so if you 
> could reply to me
> via email that would be great.
> 
> Thanks
> Dan Finn
> Unix Systems Administrator
> Student Advantage Inc
> dfinn at studentadvantage.com
> 
> 
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This SF.net email is sponsored by: Etnus, makers of TotalView, The debugger 
for complex code. Debugging C/C++ programs can leave you feeling lost and 
disoriented. TotalView can help you find your way. Available on major UNIX 
and Linux platforms. Try it free. www.etnus.com
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