Passive checks
Manuel Gutiérrez Molina
I’m not sure if this is the right place, but we are doing some tests with passive checks and we are having problems getting Naemon to interpret the information correctly.
The passive HOST check works correctly, but the service checks do not. This is the configuration in ncpa.cfg:
[passive checks]
%HOSTNAME%|__HOST__ = system/agent_version
%HOSTNAME%|CPU Usage = cpu/percent --warning 60 --critical 80 --aggregate avg
The HOST in Naemon returns OK (OK: Agent_version was 3.2.0).
The services do not: (Service check timed out after 0.00 seconds).
[1757520382] PASSIVE HOST CHECK: naemonDocker;0;OK: Agent_version was 3.2.0
[1757520382] PASSIVE SERVICE CHECK: naemonDocker;CPU Usage;2;(Service check timed out after 0.00 seconds)
[1757520382] PASSIVE SERVICE CHECK: naemonDocker;Dummy Test;2;(Service check timed out after 0.00 seconds)
[1757520442] PASSIVE HOST CHECK: naemonDocker;0;OK: Agent_version was 3.2.0
[1757520442] PASSIVE SERVICE CHECK: naemonDocker;CPU Usage;2;(Service check timed out after 0.00 seconds)
[1757520442] PASSIVE SERVICE CHECK: naemonDocker;Dummy Test;2;(Service check timed out after 0.00 seconds)
[1757520502] PASSIVE HOST CHECK: naemonDocker;0;OK: Agent_version was 3.2.0
[1757520502] PASSIVE SERVICE CHECK: naemonDocker;CPU Usage;2;(Service check timed out after 0.00 seconds)
[1757520502] PASSIVE SERVICE CHECK: naemonDocker;Dummy Test;2;(Service check timed out after 0.00 seconds)
NRDP debug.log – it seems the information is reaching NRDP, although we see the error:
nagios_command_group=naemon does not exist, not chgrp()ing
[Wed, 10 Sep 2025 16:09:26 +0000] gathered the following data:
type: service
hostname: naemonDocker
servicename: CPU Usage
state:
output: OK: Percent was 2.00 % | 'percent'=2.00%;60;80;
allow_old_results:
time: 0
[Wed, 10 Sep 2025 16:09:26 +0000] nrdp_write_check_output_to_cmd(hostname=naemonDocker, servicename=CPU Usage, state=, type=service, output=OK: Percent was 2.00 % | 'percent'=2.00%;60;80;
[Wed, 10 Sep 2025 16:09:26 +0000] nagios_command_group=naemon does not exist, not chgrp()ing
NRDP config file contains:
$cfg["nagios_command_group"] = "naemon";
/////////////////////////////////////////////////////////////
//
// command_file
//
// Full path to Nagios external command file
$cfg["command_file"] = "/var/lib/naemon/naemon.cmd";
/////////////////////////////////////////////////////////////
//
// check_results_dir
//
// Full path to check results spool directory
// check_result_dir path should be same as check_result_path setting in Nagios's nagios.cfg
$cfg["check_results_dir"] = "/var/cache/naemon/checkresults";
I think the problem might be caused by some misconfiguration in NRDP, because everything seems oriented toward Nagios rather than Naemon.
Could that be the case?
Sven Nierlein
this is probably not the right place. This is the Thruk mailing list. I mean, we do monitoring here but this seems to be an issue with
either nrdp or naemon.
Also i see you already opened an issue for naemon.
Have a nice day,
Sven
On 9/10/25 6:13 PM, Manuel Gutiérrez Molina wrote:
> I’m not sure if this is the right place, but we are doing some tests with passive checks and we are having problems getting Naemon to
> interpret the information correctly.
>
> [passive checks]
> %HOSTNAME%|__HOST__ = system/agent_version
> %HOSTNAME%|CPU Usage = cpu/percent --warning 60 --critical 80 --aggregate avg
>
>
>
>
> [1757520382] PASSIVE HOST CHECK: naemonDocker;0;OK: Agent_version was 3.2.0
> [1757520382] PASSIVE SERVICE CHECK: naemonDocker;CPU Usage;2;(Service check timed out after 0.00 seconds)
> [1757520382] PASSIVE SERVICE CHECK: naemonDocker;Dummy Test;2;(Service check timed out after 0.00 seconds)
> [1757520442] PASSIVE HOST CHECK: naemonDocker;0;OK: Agent_version was 3.2.0
> [1757520442] PASSIVE SERVICE CHECK: naemonDocker;CPU Usage;2;(Service check timed out after 0.00 seconds)
> [1757520442] PASSIVE SERVICE CHECK: naemonDocker;Dummy Test;2;(Service check timed out after 0.00 seconds)
> [1757520502] PASSIVE HOST CHECK: naemonDocker;0;OK: Agent_version was 3.2.0
> [1757520502] PASSIVE SERVICE CHECK: naemonDocker;CPU Usage;2;(Service check timed out after 0.00 seconds)
> [1757520502] PASSIVE SERVICE CHECK: naemonDocker;Dummy Test;2;(Service check timed out after 0.00 seconds)
>
> nagios_command_group=naemon does not exist, not chgrp()ing
>
>
> [Wed, 10 Sep 2025 16:09:26 +0000] gathered the following data:
> type: service
> hostname: naemonDocker
> servicename: CPU Usage
> state:
> output: OK: Percent was 2.00 % | 'percent'=2.00%;60;80;
> allow_old_results:
> time: 0
>
> [Wed, 10 Sep 2025 16:09:26 +0000] nrdp_write_check_output_to_cmd(hostname=naemonDocker, servicename=CPU Usage, state=, type=service,
> output=OK: Percent was 2.00 % | 'percent'=2.00%;60;80;
> [Wed, 10 Sep 2025 16:09:26 +0000] nagios_command_group=naemon does not exist, not chgrp()ing
>
>
> $cfg["nagios_command_group"] = "naemon";
>
>
> /////////////////////////////////////////////////////////////
> //
> // command_file
> //
> // Full path to Nagios external command file
> $cfg["command_file"] = "/var/lib/naemon/naemon.cmd";
>
> /////////////////////////////////////////////////////////////
> //
> // check_results_dir
> //
> // Full path to check results spool directory
> // check_result_dir path should be same as check_result_path setting in Nagios's nagios.cfg
> $cfg["check_results_dir"] = "/var/cache/naemon/checkresults";
>
> I think the problem might be caused by some misconfiguration in NRDP, because everything seems oriented toward Nagios rather than Naemon.
>
> Could that be the case?
>
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