[mrtg] Re: Monitoring windows

Koelstra, J. (Jan) JKoelstra at MINSZW.NL
Wed Mar 9 09:49:51 MET 2005 

Jeff,

>From http://people.ee.ethz.ch/~oetiker/webtools/mrtg/mrtg-reference.html:
-----------------------------------
Explicit OIDs

You can also explicitly define which OID to query by using the following syntax 'OID_1&OID_2:community at router' The following example will retrieve error counts for input and output on interface 1. MRTG needs to graph two variables, so you need to specify two OID's such as temperature and humidity or error input and error output.
Example:

 Target[ezwf]: 1.3.6.1.2.1.2.2.1.14.1&1.3.6.1.2.1.2.2.1.20.1:public at myrouter
-----------------------------------

I.e. you need 2 oids at the target line. To achieve this you can use the same oid twice, and add "noi" or "noo" at the options line to suppress one of the two (identical) graphs.

Some other remarks on your config: To see any result in your graph CPU load has to bo monitored with the option "gauge".
The options "gauge" and "absolute" are both some type of counter. You can only use one type of counter at the options line
If you set the AbsMax value the same as the Maxbytes value then you can omit the Absmax line.

Hth,

Jan.


-----Original Message-----
From: mrtg-bounce at list.ee.ethz.ch [mailto:mrtg-bounce at list.ee.ethz.ch] On Behalf Of Jeff Mills
Sent: Wednesday, March 09, 2005 12:37 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Monitoring windows


Hi all,
I have been using mrtg for a while now to monitor cisco routers and mailscanner, and its been working great. I would now like to start monitoring our Windows servers, but have run into a problem.

I've used "GetIf" to browse the mib tree on the windows box to get the identifiers. For instance, .1.3.6.1.2.1.25.3.3.1.2 is for processor load. .iso.org.dod.internet.mgmt.mib-2.host.hrDevice.hrProcessorTable.hrProcessorEntry.hrProcessorLoad

If I snmpwalk this, it appears to be correct:
snmpwalk -v 1 -Of -c public pocl-jet 1.3.6.1.2.1.25.3.3.1.2 .iso.org.dod.internet.mgmt.mib-2.host.hrDevice.hrProcessorTable.hrProcessorEntry.hrProcessorLoad.3 = INTEGER: 5

snmptranslate -Of 1.3.6.1.2.1.25.3.3.1.2 .iso.org.dod.internet.mgmt.mib-2.host.hrDevice.hrProcessorTable.hrProcessorEntry.hrProcessorLoad

However,
when I attempt to use this in mrtg, I get an error.
Here is what I'm using in my config:
Target[cpu_pocl-jet]: 1.3.6.1.2.1.25.3.3.1.2.3:public at pocl-jet:
AbsMax[cpu_pocl-jet]: 100
MaxBytes[cpu_pocl-jet]: 100
Title[cpu_pocl-jet]: Avg CPU Usage in pocl-jet
Legend1[cpu_pocl-jet]: Avg CPU Usage
Legend2[cpu_pocl-jet]: Avg CPU Usage
LegendI[cpu_pocl-jet]: Avg CPU Usage: 
LegendO[cpu_pocl-jet]: Avg CPU Usage: 
Ylegend[cpu_pocl-jet]: CPU Usage
ShortLegend[cpu_pocl-jet]: %
#Options[cpu_pocl-jet]: gauge,absolute,integer,nopercent
PageTop[cpu_pocl-jet]: <H1>Avg CPU Usage in pocl-jet</H1>

And here is what mrtg says:
mrtg /etc/mrtg/mrtg-servers.cfg
SNMP Error:
Received SNMP response with error code
  error status: noSuchName
  index 1 (OID: 1.3.6.1.2.1.2.2.1.10.3)
SNMPv1_Session (remote host: "pocl-jet" [150.100.100.13].161)
                  community: "public"
                 request ID: 209712455
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
 at /usr/bin/../lib/mrtg2/SNMP_util.pm line 490
SNMPGET Problem for ifInOctets.3 ifOutOctets.3 sysUptime sysName on public at pocl-jet::::::v4only  at /usr/bin/mrtg line 1849
ERROR: Target[cpu_pocl-jet][_IN_] '1.3.6.1.2.1.25.3.3.1.2. $target->[0]{$mode} ' (warn): Use of uninitialized value in concatenation (.) or string at (eval 6) line 1.
ERROR: Target[cpu_pocl-jet][_OUT_] '1.3.6.1.2.1.25.3.3.1.2. $target->[0]{$mode} ' (warn): Use of uninitialized value in concatenation (.) or string at (eval 7) line 1.

Firstly, where is "(OID: 1.3.6.1.2.1.2.2.1.10.3)" coming from? Is this what it is trying to look up on the server? It would explain why mrtg finds nothing, but if thats the case, why is it looking there instead of the target I specify? Any help is appreciated!

Regards,
Jeff

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