NRPE: Command 'check_disk' not defined
Sebastian Ganame
sganame at yahoo.com.ar
Thu May 31 19:45:39 CEST 2007
Hi John,
I think your problem is that you're defining "check_disk_sda5" in your checkcommands.cfg file, while it should be only in your "nrpe.cfg" file in each monitored instance.
The only checkcommand you should have for nrpe redirection is the following one:
define command{
command_name check_nrpe
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c $ARG1$
}
This tells the system that for each service defined with a check_command like “check_nrpe!...” it should be redirected using that line.
After this server side configuration, you should only define the check_disk_sda5 in your target system (the one that would end up reporting the metric), and it should work.
Hope you make it with these information.
Regards,
Sebastian Ganame
-----Original Message-----
From: Jonathan Murray [mailto:jmurray at whoi.edu]
Sent: Jueves, 31 de Mayo de 2007 01:47 p.m.
To: Sebastian Ganame
Cc: nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] NRPE: Command 'check_disk' not defined
Interesting. I'm still not getting it, or I'm doing something
incorrectly. I have other commands set up the same way, and they work:
for example,
on nagios "engine"
in checkcommands.cfg:
# 'check_disk_c1'
define command{
command_name check_disk_c1
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c
check_disk_c1
}
in services.cfg:
define service{
use generic-service ; Name of service template to use
host_name varuna
service_description Check /raid/c1 space
retry_check_interval 2
contact_groups linux-admin
notification_options w,c,r
check_command check_disk_c1
}
on machine I am trying to monitor, in /usr/local/nagios/etc/nrpe.cfg:
command[check_disk_c1]=/usr/local/nagios/libexec/check_disk -w 20 -c 10
-p /raid
/c1
On the web interface, in the status column I see the following:
varuna Check /raid/c1 space
OK 05-31-2007 12:21:11 2d 5h 56m 0s 1/3 DISK OK - free space:
/raid/c1 114527 MB (16% inode=99%):
So in this case, which is the same as the earlier description, it works.
Here the machine being monitored is a debian system, but I didn't
think that would make such a difference.
I have also set up the command as you specified, or how I interpreted
what you specified, I hope I was accurate here:
Nagios "engine"
in services.cfg:
define service{
use generic-service ; Name of service template to use
host_name paleo
service_description check disk sda5
retry_check_interval 2
contact_groups linux-admin
notification_options w,u,c,r
check_command check_nrpe!check_disk_sda5!20%!10%!/
}
In the above, I don't know what that / is doing after the !, but it was
in your mail, so I thought it was needed.
in checkcommands.cfg:
'check_disk_sda5'
define command{
command_name check_disk_sda5
command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c
check_disk_sda5
}
On the machine I am trying to get information on the disk sda5,
command[check_disk_sda5]=/usr/local/nagios/libexec/check_disk -w 20 -c
10 -p /dev/sda5
It would seem here that on the machine being monitored, the command
"check_disk_sda5" would use the local plugin
/usr/local/nagios/libexec/check_disk with the options:
-w 20 -c 10 -p /dev/sda5
run locally, this is indeed what it seems to do. However, the server
doesn't seem to use the command I have placed in the nrpe.cfg file.
On the web interface, this returns, in the "Status" column:
NRPE v2.7.1
What do you use for your entries in you checkcommands.cfg for your
commands? I was under the impression that I had to define the commands
there and nagios would use them.
Perhaps these questions are getting too basic?
Thanks,
Jonathan
Sebastian Ganame wrote:
> Hi John,
> Your problem is that you're trying to invoke a service that is not
> local, thus it shouldn be defined not only in your Nagios server
> configuration files, but also in the nrpe.cfg file used when the nrpe
> daemon starts on the target machine.
> I'll try to explain just a little bit what I did since I suffered
> the same situation:
>
> 1) Define a new service in Nagios Engine for monitoring non-local
> disks, as follows:
>
> define service{
> use local-service ;Name of service
> template to use
> host_name /[the servers in which you have nrpe
> installed]/
> / /service_description Remote check disk
> check_command check_nrpe!check_hda1!20%!10%!/
> }
> 2) I used check_hda1 instead of check_disk to identify the way I
> use this in the target machines. Then you need to include this type of
> call in your target machine's nrpe.cfg file, as follows (at the very end):
>
> # The following examples use hardcoded command arguments...
> command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 -p
> /dev/hda1
> This way, nrpe tells the target machine to call it's
> /usr/local/nagios/libexec/check_disk command when the Nagios core engine
> calls check_nrpe!check_hda1 on this target machine.
>
> Hope it helps, and most important that you understand what I tried
> to tell you ;-)
> Regards,
>
>
> Sebastian Ganame
>
>
> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net
> [mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf Of
> Jonathan Murray
> Sent: Miércoles, 30 de Mayo de 2007 07:49 p.m.
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] NRPE: Command 'check_disk' not defined
>
> I've been staring at this for a long time, likely pilot error, but maybe
> someone has suggestions or sees something I don't...thanks.
>
> Nagios server version 2.8, (OS debian)
> Nagios plugin version 1.4.7 (Red Hat Enterprise Linux WS release 4)
> NRPE version 2.7.1
>
> other plugins work (check_swap, check_load)
>
> On nagios server:
>
> /usr/local/nagios/etc/checkcommands.cfg
>
> <-snip->
>
> # check_disk
> define command{
> command_name check_disk
> command_line $USER1$/check_nrpe -H $HOSTADDRESS$ -c check_disk
> }
>
> <-snip->
>
> On the machine I'm trying to monitor, the one running nrpe 2.7.1 with
> the Nagios plugin version 1.4.7 (Red Hat Enterprise Linux WS release 4),
> in /usr/local/nagios/libexec/etc/nrpe.cfg:
>
> [root at paleo etc]# ls -la
> total 28
> drwxr-xr-x 2 nagios nagios 4096 May 30 17:03 .
> drwxr-xr-x 6 nagios nagios 4096 May 30 17:13 ..
> -rwxr-xr-x 1 nagios nagios 7536 May 30 17:03 nrpe.cfg
>
> <-snip->
>
> command[check_disk]=/usr/local/nagios/libexec/check_disk -w 20 -c 10 -p
> /dev/sda5
>
> <-snip->
>
> when I test it from the server "nagios" it works fine:
>
> root at nagios:/usr/local/nagios/libexec# ./check_nrpe -H paleo -c check_disk
> DISK OK - free space: / 201921 MB (93% inode=99%);|
> /=14918MB;228424;228434;0;22 8444
>
> on the system running nrpe "paleo":
>
> [root at paleo etc]# /usr/local/nagios/libexec/check_disk -w 20 -c 10 -p
> /dev/sda5
> DISK OK - free space: / 201921 MB (93% inode=99%);|
> /=14918MB;228424;228434;0;228444
>
> If NRPE, Command 'check_disk' not defined as the web interface reports,
> then where should it be defined? I thought I needed to define the
> command in the checkcommands.cfg on the server, then define the command
> on the client that is running nrpe daemon.
>
> thanks for any ideas,
>
> Jonathan Murray
>
>
>
>
>
>
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---------------------------------
Preguntá. Respondé. Descubrí.
Todo lo que querías saber, y lo que ni imaginabas,
está en Yahoo! Respuestas (Beta).
Probalo ya!
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