[Nagiosplug-help] Problem with check_http within nagios

[DeBattista, Joe]

Hi, Werner,
    The idea about there being an ownership issue on the Nagios server was a good one as there were some files owned by root (with the rest owned by Nagios), but status for the cenn client is still showing a status of UNKNOWN with the "no ouput returned from plugin"

-----Original Message-----
From: Werner Flamme [mailto:werner.flamme at ufz.de] 
Sent: Thursday, May 19, 2011 6:51 AM
To: nagiosplug-help at lists.sourceforge.net
Subject: Re: [Nagiosplug-help] Problem with check_http within nagios

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DeBattista, Joe [19.05.2011 01:06]:
> Hi,
>      I'm trying to use check_http from within nagios, and I keep getting a status UNKNOWN with "no output returned from plugin".  When I run the commands from the command line on both the client and the nagios server, I seem to get the right output, but not from within nagios itself.
> I'm using nagios version 3.0.6 on a RedhHat Linux server, with the check_http from nagios-plugins version 1.4.13. My nagios client is named cenn, and the nagios server is vx8.  
> 
> When I issue the check_nrpe command from vx8, I get the following:
> /usr/local/nagios/libexec/check_nrpe -H cenn -c check_http HTTP OK 
> HTTP/1.1 200 OK - 308 bytes in 0.001 seconds 
> |time=0.000777s;5.000000;10.000000;0.000000 size=308B;;;0
> 
>>From the client, cenn, the command also seems to run ok.
> /usr/local/nagios/libexec/check_http -H 127.0.0.1 -w 5 -c 10 HTTP OK 
> HTTP/1.1 200 OK - 308 bytes in 0.001 seconds 
> |time=0.000797s;5.000000;10.000000;0.000000 size=308B;;;0

Hi Joe,

do you enter the commands as root or as the user nagios/nrpe are running under? As root, you may try something like

su - nagios -c "/usr/local/nagios/libexec/check_nrpe -H cenn -c check_http"

(in one line).

Since the command works when executed directly and gives the desired output, it seems to be a rights problem on the nagios server.

I'm running nagios on SLES, and had to change owner and group of /var/lib/nagios (and its contents) to nagios.nagios before I was able to see nice results.

HTH
Werner
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