[Nagiosplug-help] RE: [RE: [ check_nrpe plugin error => (No output returned from plugin)] Help needed ]

[Lawrence, Lynne]

> -----Original Message-----
> From: nagiosplug-help-admin at lists.sourceforge.net
> [mailto:nagiosplug-help-admin at lists.sourceforge.net]On Behalf 
> Of Shobhan
> Challa
> Sent: Wednesday, December 22, 2004 7:39 AM
> To: nagiosplug-help at lists.sourceforge.net
> Subject: [Nagiosplug-help] RE: [RE: [ check_nrpe plugin error => (No
> output returned from plugin)] Help needed ]
> 
> 
> Hi Lawrence,
> 
> I've incorporated your changes in the config file and it 
> works fine without
> any errors.
> 
> 1) I've noticed another problem. I've added two more services (total
> services now:3 ) in the services.cfg as follows:
> 
> 
> define service{
>         use                             generic-service       
>   ; Name of
> service template to use
>         host_name                       Linux2
>         service_description             check
>         check_period                    24x7
>         max_check_attempts              15
>         normal_check_interval           5
>         retry_check_interval            1
>         check_command
> check_nrpe!check_disk!80%!80%!/dev/hda9
>         contact_groups                  linux-admins
>         notification_interval           120
>         notification_period             24x7
>         notification_options            c,r
>         register                        1
>         }
> define service{
>         use                             generic-service       
>   ; Name of
> service template to use
>         host_name                       Linux2-0
>         service_description             check-ssh
>         check_period                    24x7
>         max_check_attempts              15
>         normal_check_interval           5
>         retry_check_interval            1
>         check_command                   
> check_nrpe!check_ssh!192.168.100.125
>         contact_groups                  linux-admins
>         notification_interval           120
>         notification_period             24x7
>         notification_options            c,r
>         register                        1
>         }
> 
> define service{
>         use                             generic-service       
>   ; Name of
> service template to use
>         host_name                       Linux2-1
>         service_description             check-users
>         check_period                    24x7
>         max_check_attempts              15
>         normal_check_interval           5
>         retry_check_interval            1
>         check_command                   check_nrpe!check_users!4!5
>         contact_groups                  linux-admins
>         notification_interval           120
>         notification_period             24x7
>         notification_options            c,r
>         register                        1
>         }
> 
> I've added the relevant host information to hosts.cfg and 
> hostgroups.cfg and
> restarted NAGIOS.
> 
> Tailing the /var/log/messages on the Nagios host shows that 
> the nrpe client
> is performing checks for "check-disk" and "check-users" 
> services and not for
> "chec-ssh" service.
> Any idea why is it so..?? 

If what you are trying to accomplish with the check_ssh check is whether
sshd is running on host Linux2-0, you don't need to run it through nrpe.
Nrpe is only used to run checks on the monitored system - disk and user
checks have to be run on the monitored system.

Ssh, on the other hand, is a network service that can be monitored remotely
from your management station (the system running Nagios) using check_ssh.
Typically, the service definition would define the check command as:

	check_command 	check_ssh

and have the command defined something like the following:

	define command {
		command_name	check_ssh
		command_line	$USER1$/check_ssh %HOSTADDRESS%
	}

> 
> 2) How do I make Nagios to check the services every 5 minutes 
> of every 15
> minutes. Currently the services are checked every 1 hour (looking at
> /var/log/messages).

Your service checks look like they are set up to run every 5 minutes
(assuming the interval_length in nagios.cfg is set to 60 - you might want to
check that out).  Are you sure that the checks are not running?  On my
system, I don't get log messages each time a service check runs.  What does
your web interface tell you?

> 
> Regards
> --Shobhan
><snip>
>