Passive service-checks
Harper Mann
hmann at itgroundwork.com
Wed Sep 15 09:09:49 CEST 2004
Hi Johan,
Yes, I did mean you!
The check is set active. Try setting it to passive by selecting the service
and clicking "Disable checks of this service". You can test the
notification by clicking "Submit passive check result for this service".
The check is set is_volatile on, with max_check_attempts set to 3. It looks
like Nagios was not restarted / reloaded after the config was changed since
the config shows max_check_attempts 1 but the GUI shows 1/3 which means
max_check_attemps 3. You should restart it in case reload missed the
change, however, I've not had reload fail to load a config change.
What I think is happening is that the SNMP trap is delivered, but it's only
1 of 3 so it's only a soft state change. In 5 minutes, the active check
that's defined, check-host-alive, runs and clears the soft state so you are
never getting a hard non-ok state to trigger the Notification. If you
restart Nagios, it should put the check in Passive and max_check_attempts to
1 which should Notify on the first trap post.
Can you post the check alert history with "View Alert History For This
Service" for a time period where you were testing the Passive check? It
should show what was happening.
Regards,
- Harper
Harper Mann
Groundwork Open Source Solutions
510-599-2075 (cell)
-----Original Message-----
From: nagios-users-admin at lists.sourceforge.net
[mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of Johan Henes
Sent: Tuesday, September 14, 2004 11:09 PM
To: hmann at itgroundwork.com; 'Jose Dragone';
nagios-users at lists.sourceforge.net
Subject: Re: [Nagios-users] Passive service-checks
----- Original Message -----
From: "Harper Mann" <hmann at itgroundwork.com>
To: "'Jose Dragone'" <jdragone at pictage.com.ar>;
<nagios-users at lists.sourceforge.net>
Sent: Wednesday, September 15, 2004 5:35 AM
Subject: RE: [Nagios-users] Passive service-checks
> Hi Jose,
>
> The Email message below looks like an Active check. Does the check have a
> big red "P" for Passive Check by it in "Service Detail"? Is the trap
shown
> in the Nagios event log? It likely is if the trap message is showing up
in
> the service detail. The Service Detail should not show a plugin timeout
as
> it's not supposed to be calling a plugin.
>
> Can you post the service definition with any template parents and the
> trap_handler?
I guess You wanted it from me, as it was my service-check in the previous
mail :-)
I see no big P - The Service Details says :
----
Current Status: OK
Status Information: PING OK - Packet loss = 0%, RTA = 1.20 ms
Current Attempt: 1/3
State Type: HARD
Last Check Type: ACTIVE
Last Check Time: 15-09-2004 07:52:07
Status Data Age: 0d 0h 2m 43s
Next Scheduled Active Check: 15-09-2004 07:57:07
Latency: < 1 second
Check Duration: 4 seconds
Last State Change: 15-09-2004 07:42:13
Current State Duration: 0d 0h 12m 37s
Last Service Notification: N/A
Current Notification Number: 0
Is This Service Flapping? N/A
Percent State Change: N/A
In Scheduled Downtime? NO
Last Update: 15-09-2004 07:54:48
Service Checks: ENABLED
Passive Checks: ENABLED
Service Notifications: ENABLED
Event Handler: ENABLED
Flap Detection: ENABLED
-----
The trap is shown in the log :
---
[1095197698] EXTERNAL COMMAND:
PROCESS_SERVICE_CHECK_RESULT;10.0.48.40;TRAP;WARNING;10.0.48.5
login/logout with 0
---
Here is the service definition :
- Template :
---
define service{
name generic-service ; The 'name' of this
service template, referenced in other service definitio
ns
active_checks_enabled 1 ; Active service checks are
enabled
passive_checks_enabled 1 ; Passive service checks are
enabled/accepted
parallelize_check 1 ; Active service checks
should be parallelized (disabling this can lead to major per
formance problems)
obsess_over_service 1 ; We should obsess over this
service (if necessary)
check_freshness 0 ; Default is to NOT check
service 'freshness'
notifications_enabled 1 ; Service notifications are
enabled
event_handler_enabled 1 ; Service event handler is
enabled
flap_detection_enabled 1 ; Flap detection is enabled
process_perf_data 1 ; Process performance data
retain_status_information 1 ; Retain status information
across program restarts
retain_nonstatus_information 1 ; Retain non-status
information across program restarts
register 0 ; DONT REGISTER THIS
DEFINITION - ITS NOT A REAL SERVICE, JUST A TEMPLATE!
}
---
The servicedefinition :
---
define service{
use generic-service
host_name *
service_description TRAP
is_volatile 1
check_period 24x7
contact_groups linux-admins
passive_checks_enabled 1
active_checks_enabled 0
max_check_attempts 1
normal_check_interval 5
retry_check_interval 1
notification_interval 5
notification_period 24x7
notification_options w,u,c,r
notifications_enabled 1
check_command check-host-alive
}
---
My trap-handler :
[root at bigb nagios]# cat /etc/snmp/snmptrapd.conf
traphandle default /usr/sbin/snmptthandler
..
..
snmptt.conf :
EXEC /usr/lib/nagios/plugins/eventhandlers/submit_check_result $r TRAP
'WARNING' "$2 login/logout with $3"
...
...
and last ...
...
#!/bin/sh
# SUBMIT_CHECK_RESULT
# Written by Ethan Galstad (nagios at nagios.org)
# Last Modified: 02-18-2002
#
# This script will write a command to the Nagios command
# file to cause Nagios to process a passive service check
# result. Note: This script is intended to be run on the
# same host that is running Nagios. If you want to
# submit passive check results from a remote machine, look
# at using the nsca addon.
#
# Arguments:
# $1 = host_name (Short name of host that the service is
# associated with)
# $2 = svc_description (Description of the service)
# $3 = return_code (An integer that determines the state
# of the service check, 0=OK, 1=WARNING, 2=CRITICAL,
# 3=UNKNOWN).
# $4 = plugin_output (A text string that should be used
# as the plugin output for the service check)
#
echocmd="/bin/echo"
CommandFile="/var/log/nagios/rw/nagios.cmd"
# get the current date/time in seconds since UNIX epoch
datetime=`date +%s`
# create the command line to add to the command file
cmdline="[$datetime] PROCESS_SERVICE_CHECK_RESULT;$1;$2;$3;$4"
# append the command to the end of the command file
`$echocmd $cmdline >> $CommandFile`
... Thats it :-)
Johan
-------------------------------------------------------
This SF.Net email is sponsored by: thawte's Crypto Challenge Vl
Crack the code and win a Sony DCRHC40 MiniDV Digital Handycam
Camcorder. More prizes in the weekly Lunch Hour Challenge.
Sign up NOW http://ad.doubleclick.net/clk;10740251;10262165;m
_______________________________________________
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
-------------------------------------------------------
This SF.Net email is sponsored by: thawte's Crypto Challenge Vl
Crack the code and win a Sony DCRHC40 MiniDV Digital Handycam
Camcorder. More prizes in the weekly Lunch Hour Challenge.
Sign up NOW http://ad.doubleclick.net/clk;10740251;10262165;m
_______________________________________________
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
More information about the Users
mailing list