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Passive checks with NRDP
Posted: Mon Jun 27, 2016 8:01 am
by peter19x
Hello,
I am trying to use passive check from my server and send it to the nagios core server.
My Passive check command that I send from the server is the below:
Code: Select all
Select all/home/nagiosscripts/send_nrdp.sh -u http://172.25.28.119/nrdp/ -t nb65fgtadI39 -H "sbc-siplab02" -s "dbstatus" -S 2 -o "DB status is DOWN"
And to make sure it is arriving on the nagios core I am getting the error below in the /usr/local/nagios/var/nagios.log
Code: Select all
Select all[1467022444] Error: Got check result for service 'dbstatus' on host 'sbc-siplab02'. Unable to find service
So I have added my host that is sending the passive checks along with the service dbstatus In a .cfg file as below:
Code: Select all
Select alldefine host{
host_name sbc-siplab02
address 172.25.25.11
check_command check-host-alive
check_period 24x7
check_interval 5
retry_interval 1
max_check_attempts 5
contact_groups admins
notification_interval *
notification_period workhours
}
define service{
host_name sbc-siplab02
service_description dbstatus
check_period 24x7
max_check_attempts 5
normal_check_interval 5
retry_check_interval 1
}
Pardon my question if it is too basic, but I am not sure what 'check_command' should be added in the service dbstatus or if there is something else for passive checks that should be added
and when I run
Code: Select all/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
I get the following error:
Error: Could not register service (config file '/usr/local/nagios/etc/objects/store.cfg', starting on line 33)
line 33 is the dbstatus service I have added.
Any idea what is missing in this scenario ?
Thanks,
Peter
Re: Passive checks with NRDP
Posted: Mon Jun 27, 2016 8:23 am
by eloyd
You should start by reading
https://assets.nagios.com/downloads/nag ... hecks.html if you have not already.
You'll need to set accept_passive_service_checks directive to 1 in /usr/local/nagios/etc/nagios.cfg, and set the passive_checks_enabled directive in your host and/or service definitions to 1. Then, the check_command should probably set to "check_dummy!1!Passive check result not received" or something like that. Here's why:
When a check is defined as passive, Nagios does not control when it is executed and thus has no idea how long it will be before the next check comes in. So the "freshness_interval" defines how long Nagios will wait for a passive check result, and if it doesn't see one in that length of time, it will execute its local check_command. Mostly, you want to simply notify yourself that the passive check hasn't come in, which is why I recommend check_dummy as above.
Good luck!
Re: Passive checks with NRDP
Posted: Mon Jun 27, 2016 8:29 am
by eloyd
As a bonus, here's a copy of our NCPA passive check service template. Similar to what you're doing with NRDP, but NCPA is doing the scheduling and then sending the results back to our Nagios server via NRDP. The assumption here is that the passive checks are normally sent every 15 minutes, so if we don't have a check result within 2000 seconds (which is just over 33 minutes) then we get worried and execute our check_command.
Code: Select all
define service {
name NPCA Passive Service
service_description NPCA Passive Service
check_command check_dummy!1!WARNING: No data from passive check!!!!!!
max_check_attempts 5
check_interval 30
retry_interval 5
active_checks_enabled 0
passive_checks_enabled 1
check_period 24x7
obsess_over_service 0
check_freshness 1
freshness_threshold 2000
notification_interval 60
first_notification_delay 0
notification_period 24x7
notifications_enabled 0
register 0
}
Re: Passive checks with NRDP
Posted: Mon Jun 27, 2016 9:52 am
by peter19x
Hello,
Thank again @eloyd for the reply.
I have read indeed the document and just double checked the parameter accept_passive_service_checks=1
I have also added the service and restarted nagios with no error as below:
Code: Select all
define service {
name dbstatus
service_description dbstatus
check_command check_dummy!1!WARNING: No data from passive check!!!!!!
max_check_attempts 5
check_interval 30
retry_interval 5
active_checks_enabled 0
passive_checks_enabled 1
check_period 24x7
obsess_over_service 0
check_freshness 1
freshness_threshold 20
notification_interval 60
first_notification_delay 0
notification_period 24x7
notifications_enabled 0
register 0
}
and unfortunately still getting the same error when I send the passive check like the service I added doesn't exist:
Code: Select all
[1467038341] Error: Got check result for service 'dbstatus' on host 'sbc-siplab02'. Unable to find service
PS: didn't know if in the service definition the name is meant for hostname or service name, anyhow, tried both dbstatus and sbc-siplab02 with same result.
Best Regards,
Peter
Re: Passive checks with NRDP
Posted: Mon Jun 27, 2016 10:02 am
by peter19x
Stupid me. Forgot the to close the bracket in the command.cfg file when I added the check_dummy function.
It works perfectly now!:)
Thank you for helping me solve the issue since day one.
Best Regards,
Peter
Re: Passive checks with NRDP
Posted: Mon Jun 27, 2016 10:07 am
by eloyd
Typos suck.
Glad I could help! Feel free to nominate me for an MVP award through the link in my signature if you think I've been especially helpful.
Re: Passive checks with NRDP
Posted: Mon Jun 27, 2016 1:32 pm
by mcapra
Closing this and marking as resolved