NSCA Confusing host check results as service checks
Brian A. Seklecki
lavalamp at spiritual-machines.org
Wed Nov 28 17:06:46 CET 2007
Original msg:
> Warning: Passive check result was received for service '0' on host
> 'server1', but the service could not be found!
NSCA daemon makes the host/service check determination based simply on the
number of arguments.
If you take a remote nagios instance which is reporting passive
host/service checks, you can bump the debugging_level=384 and see
something like this:
[1196258852.155446] [256.1] [pid=20619] Running command
'/usr/local/libexec/nagios/send_host_check fbsd05 0 'PING OK - Packet loss
= 0%, RTA = 0.67 ms''...
In this case, there are the proper number of arguments: 3
But NSCA recieving this msg is seeing 4 arguments.
A closer look at /usr/local/libexec/nagios/send_host_check reveals why:
#!/bin/sh
/bin/echo "$1","$2","$3" | /usr/local/sbin/send_nsca -H master.tld \ -c
/usr/local/etc/nagios/send_nsca.cfg -d ","
This means that depending on how shit is escaped within:
- Nagios on remote node
- /bin/sh
- send_nsca binary
Therefore, a $3 value of: 'PING OK - Packet loss = 0%, RTA = 0.67 ms'
May or may not be truncated into three values. I'm going to track it down
further.
~BAS
---------- Forwarded message ----------
Date: Mon, 19 Nov 2007 13:52:21 -0500 (EST)
From: Brian A. Seklecki <lavalamp at spiritual-machines.org>
To: miskobs at yahoo.com
Cc: nagios-users at lists.sourceforge.net, chris at sigd.net
Subject: RE: [Nagios-users] nsca PROCESS_HOST_CHECK_RESULT problem
Bratislav:
Did you ever resolve these bizaare PROCESS_HOST_CHECK_RESULT /
PROCESS_SERVICE_CHECK_RESULT errors?
I'm having trouble debugging them as well
~BAS
> If I simulate host down I got HOST_CHECK from nagios.log on remote host:
> EXTERNAL COMMAND: PROCESS_HOST_CHECK_RESULT;server1;1;PING CRITICAL - Packet
> loss = 100%
> but regularly, it is triggered like it is service check, and
> PROCESS_HOST_CHECK_RESULT is not performed at all.
> [1175605177] EXTERNAL COMMAND:
> PROCESS_SERVICE_CHECK_RESULT;server1;0;0; RTA = 0.18 ms [1175605177]
> Warning: Passive check result was received for service '0' on host
> 'server1', but the service could not be found!
l8*
-lava (Brian A. Seklecki - Pittsburgh, PA, USA)
http://www.spiritual-machines.org/
"Guilty? Yeah. But he knows it. I mean, you're guilty.
You just don't know it. So who's really in jail?"
~Maynard James Keenan
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