freshness check bug?
admin at jpk236.com
admin at jpk236.com
Wed May 11 18:39:01 CEST 2005
Bryan,
A freshness_threshold of 60 seconds might be a little unrealistic. The
default value for the threshold is 300 seconds (5 minutes).
If you want almost real-time stats, which appears to be what you're
going for, perhaps you want to try NRPE or check_by_ssh as an
alternative method of doing distributed monitoring.
- Justin Kulikowski
[ http://www.jpk236.com ]
Bryan Loniewski wrote:
> While trying to setup failover in a distributed environment, I came
> across the following
> problem (bug?) involving freshness checking.
>
> Note: The host that this is setup on is NOT receiving any passive checks
> while I am
> testing the freshness checking.. so the results are always stale forcing
> the freshness
> check everytime.
>
> Note2: Relevant config snippets are under my .sig
>
> Trying to configure (passive) service freshness checking to execute an
> eventhandler
> works correctly for 1 or 2 iterations.. BUT no more than that. It seems
> to stop checking
> the freshness after at most 3 iterations and stops executing the
> eventhandler after at most 2 iterations. I've replicated this behavior
> (too) many times and the results are
> inconsistent.
>
> Below is the output of my nagios log:
>
> <snip nagios.log>
> [1115822708] Finished daemonizing... (New PID=15941)
> [1115822828] Warning: The results of service 'PROCS-NAGIOS' on host
> 'csstest2' are stale
> by 60 seconds (threshold=60 seconds). I'm forcing an immediate check of
> the service.
> [1115822838] SERVICE ALERT: csstest2;PROCS-NAGIOS;CRITICAL;SOFT;1;CRITICAL
> [1115822838] SERVICE EVENT HANDLER:
> csstest2;PROCS-NAGIOS;CRITICAL;SOFT;1;slave-failover
> [1115822948] Warning: The results of service 'PROCS-NAGIOS' on host
> 'csstest2' are stale
> by 60 seconds (threshold=60 seconds). I'm forcing an immediate check of
> the service.
>
> Notice the freshness check ran ONLY 2 times when it should have run 5
> (if you look at my
> config options below) and the eventhandler ran ONLY 1 time, when it
> should have ran 3 times.
>
> Can anyone verify (disprove) this behavior? Am I missing something?
>
> _________________________
> Bryan Loniewski
> Rutgers University
> NBCS - Systems Programmer
>
> <snip nagios.cfg>
> check_service_freshness=1
> service_freshness_check_interval=60
> <snip>
>
> <snip objects.cfg>
> define service{
> name generic-service
> parallelize_check 1
> obsess_over_service 1
> check_freshness 0
> freshness_threshold 60
> notifications_enabled 1
> event_handler_enabled 1
> flap_detection_enabled 1
> failure_prediction_enabled 1
> process_perf_data 1
> retain_status_information 1
> retain_nonstatus_information 1
> is_volatile 0
> max_check_attempts 5
> normal_check_interval 2
> retry_check_interval 1
> check_period 24x7
> contact_groups super-admins
> notification_interval 3
> notification_period 24x7
> register 0
> }
> define service{
> use generic-service
> name generic-passive-service
> active_checks_enabled 0
> passive_checks_enabled 1
> register 0
> }
> define service{
> use generic-passive-service
> host_name csstest2
> service_description PROCS-NAGIOS
> check_freshness 1
> freshness_threshold 60
> check_command check_dummy!2
> event_handler slave-failover
> }
> define command{
> command_name check_dummy
> command_line $USER1$/check_dummy $ARG1$
> }
> define command{
> command_name slave-failover
> command_line $USER2$/failover $SERVICESTATE$ $SERVICESTATETYPE$
> }
> <snip>
>
>
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