Nagios / NSclient 4.1 /NRPE Ignores parameters

Support forum for Nagios Core, Nagios Plugins, NCPA, NRPE, NSCA, NDOUtils and more. Engage with the community of users including those using the open source solutions.
Locked
ndj
Posts: 3
Joined: Mon Jan 23, 2017 12:29 pm

Nagios / NSclient 4.1 /NRPE Ignores parameters

Post by ndj »

Hello everyone,

So today i've been setting up my nagios server and client to monitor their physical memory, I'm using a linux nagios box and a windows server 2012 with NSClient++

So i've went into my nsclient.ini and changed this;

Code: Select all

; Section for NRPE (NRPEServer.dll) (check_nrpe) protocol options.
[/settings/NRPE/server]

; COMMAND ARGUMENT PROCESSING - This option determines whether or not the we will allow clients to specify arguments to commands that are executed.
allow arguments = true
this is how the default checkMem looks in my nsclient.ini

Code: Select all

; alias_mem - Alias for alias_mem. To configure this item add a section called: /settings/external scripts/alias/alias_mem
alias_mem = checkMem MaxWarn=80% MaxCrit=90% ShowAll=long type=physical type=virtual type=paged type=page

(and restarted the nsclient service)

I also defined my command in my commands.cfg

Code: Select all

# 'check_mem' command definition
define command{
        command_name    check_mem
        command_line   /usr/lib64/nagios/plugins/check_nrpe -H $HOSTADDRESS$ -p 5666 -c CheckMEM -a MaxWarn=$ARG1$ MaxCrit=$ARG2$ type=physical
       }
And this is how my windows.cfg looks like where I define the service:

Code: Select all

define service{
        use                     generic-service
        host_name               SEY-ERP03,SEY-ERP02
        service_description     Physical Memory Usage
        check_command           check_mem!85!95
        }
This is how it looks when I run it manually and I ask the errorcode = 2 according to the docs this is indeed critical

Code: Select all

[root@SEY-NAGIOS objects]# /usr/lib64/nagios/plugins/check_nrpe -H SEY-ERP03 -p 5666 -c CheckMEM -a MaxWarn=80 MaxCrit=90 ShowAll type=physical
CRITICAL: physical memory: Total: 16G - Used: 11.5G (71%) - Free: 4.55G (29%) > critical|'physical memory %'=71%;99;99 'physical memory'=12298706944B;80;90;0;17179398144
[root@SEY-NAGIOS objects]# echo $?
2
So my question is why is nagios ignoring my parameters ? I want them to only go on warning/critical when USED PHYSICAL MEM is 85% and 95%
Any help would be greatly appreciated

EDIT: some extra information this is what I can read from the webui :

Code: Select all

Current Status:	  CRITICAL   (for 0d 1h 6m 46s)
Status Information:	CRITICAL: physical memory: Total: 16G - Used: 11.5G (71%) - Free: 4.49G (29%) > critical
Performance Data:	'physical memory %'=71%;100;99 'physical memory'=12360978432B;0;90;0;17179398144
Current Attempt:	3/3  (HARD state)
Last Check Time:	01-23-2017 16:37:56
Check Type:	ACTIVE
Check Latency / Duration:	0,000 / 0,000 seconds
Next Scheduled Check:  	01-23-2017 16:47:56
Last State Change:	01-23-2017 15:38:53
Last Notification:	01-23-2017 15:42:53 (notification 1)
Is This Service Flapping?	  NO   (5,00% state change)
In Scheduled Downtime?	  NO  
Last Update:	01-23-2017 16:45:36  ( 0d 0h 0m 3s ago)
and this is something i've got from messing around with the nssclient ++
Image
Last edited by ndj on Tue Jan 24, 2017 3:10 am, edited 1 time in total.
User avatar
mcapra
Posts: 3739
Joined: Thu May 05, 2016 3:54 pm

Re: Nagios / NSclient 4.1 /NRPE Ignores parameters

Post by mcapra »

It's worth mentioning that altering the NSClient++ alias alias_mem bears no weight on calling the actual CheckMEM command.

You might try upgrading to the latest version of NSClient++:
https://www.nsclient.org/download/

I was unable to reproduce this against the recommended bugfix versions of 0.4.1 and 0.4.3:

Code: Select all

[root@xi-stable ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.67.99
I (0,4,1,90 2013-02-04) seem to be doing fine...
[root@xi-stable ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.67.99 -c CheckMEM -a MaxWarn=75% MaxCrit=90% ShowAll type=physical
OK: physical memory: 2.63G|'physical memory %'=65%;75;90 'physical memory'=2.62G;3;3.58999;0;3.99
[root@xi-stable ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.67.99 -c CheckMEM -a MaxWarn=50% MaxCrit=60% ShowAll type=physical
CRITICAL: physical memory: Total: 4G - Used: 2.62G (65%) - Free: 1.38G (35%) > critical|'physical memory %'=65%;50;60 'physical memory'=2.62G;2;2;0;3.99

###

[root@xi-stable ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.67.99
I (0.4.3.143 2015-04-29) seem to be doing fine...
[root@xi-stable ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.67.99 -c CheckMEM -a MaxWarn=75% MaxCrit=90% ShowAll type=physical
OK: physical: Total: 3.999GB - Used: 2.628GB (65%) - Free: 1.371GB (34%)|'physical'=2.62804GB;2.99957;3.59949;0;3.99943 'physical %'=65%;75;89;0;100
[root@xi-stable ~]# /usr/local/nagios/libexec/check_nrpe -H 192.168.67.99 -c CheckMEM -a MaxWarn=50% MaxCrit=60% ShowAll type=physical
CRITICAL: physical: Total: 3.999GB - Used: 2.629GB (65%) - Free: 1.37GB (34%)|'physical'=2.62948GB;1.99971;2.39966;0;3.99943 'physical %'=65%;50;59;0;100
Can you share your specific NSClient++ and check_nrpe versions? These commands executed from the CLI of your Nagios Core machine should do the trick:

Code: Select all

/usr/lib64/nagios/plugins/check_nrpe -H SEY-ERP03
/usr/lib64/nagios/plugins/check_nrpe
Can you also share your complete NSClient++ configuration file from the remote machine?
Former Nagios employee
https://www.mcapra.com/
ndj
Posts: 3
Joined: Mon Jan 23, 2017 12:29 pm

Re: Nagios / NSclient 4.1 /NRPE Ignores parameters

Post by ndj »

So this is my NSclient++ version:

Code: Select all

[root@SEY-NAGIOS ~]# /usr/lib64/nagios/plugins/check_nrpe -H SEY-ERP03
I (0,4,1,73 2012-12-17) seem to be doing fine...
and this is my nrpe version

Code: Select all

[root@SEY-NAGIOS ~]# /usr/lib64/nagios/plugins/check_nrpe
Incorrect command line arguments supplied

NRPE Plugin for Nagios
Copyright (c) 1999-2008 Ethan Galstad (nagios@nagios.org)
Version: 2.15
Last Modified: 09-06-2013
and indeed I was thinking to maybe upgrade to a later version of NSClient ++ but that would mean I also have to change the command since they use diffrent commands ?
ndj
Posts: 3
Joined: Mon Jan 23, 2017 12:29 pm

Re: Nagios / NSclient 4.1 /NRPE Ignores parameters

Post by ndj »

Fixed this issue by updating my NSCLIENT to 5.0
User avatar
mcapra
Posts: 3739
Joined: Thu May 05, 2016 3:54 pm

Re: Nagios / NSclient 4.1 /NRPE Ignores parameters

Post by mcapra »

Awesome! Did you have additional questions regarding this issue, or can we close this thread and mark it as resolved?
Former Nagios employee
https://www.mcapra.com/
Locked