puzzling no output from nrpe run of check_load

[Peter N. Steinmetz]

Continuing with this debugging. I think I understand the point about needing a shell permission to write output to the terminal window. 

I've now replaced the shell on the remote host with /bin/false and eliminated the password for the nagios user on the remote machine. If I leave the password and shell for the nagios user on the nagios server, I can execute the following there:

 sudo su nagios -c "/usr/lib/nagios/plugins/check_nrpe -H rm16 -c check_load"

and I get the expected output. This would seem to imply that the nrpe daemon on the remote can run the check_load command and get output from it, passing it back to the nagios server, right?

The configuration for the remote service on the nagios server is (in /etc/nagios3/conf.d/rm16.cfg):

define service {
  use generic-service
  host_name rm16
  service_description nrpe-load
  check_command check_nrpe!check_load
}
which appears to agree with the example on page 11 of the NRPE manual. 

Yet the nagios server is constantly showing:

Current Status:	  UNKNOWN   (for 7d 22h 37m 19s)
Status Information:	(No output returned from plugin)
NRPE Plugin for Nagios

for service state information on that remote host. 

The definition of the check_command seems right for a no argument command on the remote -- but is this wrong somehow? 

I also just tried changing the service definition to 

# NRPE load check
define service {
  use generic-service
  host_name rm16
  service_description nrpe-load
  check_command check_nrpe_1arg!check_load!$HOSTADDRESS$
}

but the same complaint is showing up in the server output for this service, which seems a bit odd given then the command should now be check_nrpe_1arg rather than check_nrpe.

thanks,
Peter

On Apr 30, 2012, at 10:56 AM, Eliezer Croitoru wrote:

> so it seems that the check_load needs shell rights to show any output 
> what so ever also the --help stuff.
> it's kind of understandable.
> 
> Eliezer


------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Nagios-users mailing list
Nagios-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-users
::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. 
::: Messages without supporting info will risk being sent to /dev/null