[icinga-users] [NEWS: ] Re: NRPE output contains random characters

Lange, Stefan (GIT-IODO) Stefan.Lange at bshg.com
Mon Mar 12 15:56:45 CET 2018


which version of check_nrpe do you use?

Regards n0braist

-----Original Message-----
From: icinga-users [mailto:icinga-users-bounces at lists.icinga.org] On Behalf Of Antony Stone
Sent: Friday, March 9, 2018 3:53 PM
To: Icinga User's Corner <icinga-users at lists.icinga.org>
Subject: [NEWS: ] Re: [icinga-users] NRPE output contains random characters

On Friday 09 March 2018 at 14:01:17, Martin.Schmidt at hagebau.com wrote:

> Hello fellow users!
> NRPE - Nagios Remote Plugin Executor
> Version: 3.2.0
> look at this link.
> https://imgur.com/a/QewIK

Still using Icinga1 and NRPE??  Hm...

> i am experincing weird nrpe outputs lately.

What do you mean by "lately"?  When did things change?  Can you identify anything you updated on either the server or monitored hosts at that time?

> First screenshot ist check_disk:
> check_nrpe!check_disk!10% 5% /boot
> Second sceenshot is an customcheck:
> check_nrpe!check_db_areastatus!90 95 /areaname

What happens if you run the NRPE check manually from the command line on the Icinga server (as the Icinga user) - what result do you get back from the remote host?

> I dont know why the weird characters appearing in our calls. Restart 
> the nrpe service multiple times fixes the problem. The problem appears 
> random on our 5xx servers and are not persistent,

When you say "our 5xx servers", do you mean that you have between 500 and 600 servers being monitored, or something else?

> since nrpe restarts fixes the problem. It appears only on checks with 
> parameter for path, at least this is my finding for now. We tried 
> putting the path in "" but nothing changes.
> Can i provide any more informations? Does anyone encouter this behavior?

Could you get your custom check to write something to a log file on the remote machine being monitored, to record what parameters it received?


The first fifty percent of an engineering project takes ninety percent of the 
time, and the remaining fifty percent takes another ninety percent of the time.

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