trap scripting

[Hugo van der Kooij]

Right,

I think I will give a go at writing my own scripts to send out UP and DOWN
notifications based on the SNMP traps I get from my router.

If I understood the manual (nagios/docs/extcommands.html) correctly all I
have to do is that I just have to write a single line to the fifo like:

PROCESS_HOST_CHECK_RESULT <host>;<status>;<whatever details I would like to add about the trap>

So if I have a host definition like:

define host{
        use                     generic-host
        host_name               Internet
        alias                   Internet
        address                 192.168.1.254
        parents                 anfalas
        check_command           check_snmp_int!public!Virtual-Access2
        max_check_attempts      3
        check_interval          3s      ; Check every second on retries
        notification_interval   120
        notification_period     24x7
        notification_options    d,r
        contact_groups  admins
        }

Which uses SNMP to do active polling like:

define command{
        command_name    check_snmp_int
        command_line    $USER1$/check_snmp_int.pl -H $HOSTADDRESS$ -C $ARG1$ -n $ARG2$
        }

I could send a message like:

PROCESS_HOST_CHECK_RESULT Internet;DOWN;TRAP: PPP LCP Closed

And the host would be considered down as it will read this as a passive
check result.

Or did I misread anything?

Basically I want to stop polling as soon as I get the link down trap from
the router to all hosts not local on my network. At present the SNMP trap
is just send per email to me like:

Date: Mon, 12 Dec 2005 18:33:54 +0100
From: root at gandalf.hugo.vanderkooij.org
To: hugo at vanderkooij.org
Subject: trap received from 192.168.1.254:

Host: 192.168.1.254 (anfalas.hugo.vanderkooij.org)
                     IF-MIB::ifIndex.25  25
               IF-MIB::ifAdminStatus.25  up
                IF-MIB::ifOperStatus.25  down
                     IF-MIB::ifDescr.25  Virtual-Access2
                      IF-MIB::ifType.25  ppp
SNMPv2-SMI::enterprises.9.2.2.1.1.20.25  "PPP LCP Closed"

But I'm sure I can fetch this in a nice script instead and use it to
update Nagios once I know what to send to Nagios.


Hugo.

-- 
	I hate duplicates. Just reply to the relevant mailinglist.
	hvdkooij at vanderkooij.org		http://hvdkooij.xs4all.nl/
		Don't meddle in the affairs of magicians,
		for they are subtle and quick to anger.


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