'Disable Host Checks' not working?

[Ludo Bosmans]

Hi Steve,

I did some additional tests on Nagios version 1.2 with following
results:

When a host check is disabled for a specific host, services for that
host are still scheduled unless they are also disabled. A status change
of a service for that host is not forcing a host check. This result in
avoiding
a possible ( tremendous ) latency increase since the host check is not
executing anymore and is not interrupting service scheduling. Of course
there is still an impact on global service scheduling, since service
checks for that host will time out and when the maximum of concurrent
checks is reached, checks are delayed, still increasing latency. 

When the host check is enabled, the host check seems to be executed,
only up-on a service state change.

Further I have no explanations for your results, unless multiple
instances of nagios are running and this is also causing additional
effects.

Kind regards,

ludo


-----Original Message-----
From: nagios-users-admin at lists.sourceforge.net
[mailto:nagios-users-admin at lists.sourceforge.net] On Behalf Of Steve
Shipway
Sent: dinsdag 14 juni 2005 5:55
To: nagios-users at lists.sourceforge.net
Subject: [Nagios-users] 'Disable Host Checks' not working?

Hi - I appear to have found something which is not working as expected.

As I understand it, if you disable host checks for a host, then it will
remain in its current state and no checks will be attempted.

However, even with host checks disabled, they are still occuring!  See
this:

Host Status:   DOWN  (Has been acknowledged)   
Status Information: (No Information Returned From Host Check) 
Last Status Check: 14-06-2005 15:47:37 
Status Data Age: 0d 0h 0m 40s 
Last State Change: 14-06-2005 10:22:26 
Current State Duration: 0d 5h 25m 51s 
Last Host Notification: 14-06-2005 10:22:26 
Current Notification Number:   1   
Is This Host Flapping?   NO   
Percent State Change: 0.00% 
In Scheduled Downtime?   NO   
Last Update: 14-06-2005 15:47:56 
  
Host Checks:   DISABLED   
Host Notifications:   ENABLED   
Event Handler:   ENABLED   
Flap Detection:   ENABLED   
 
The current time is 14-06-05 15:50.  As you see, it last ran a host
check 3
minutes ago, despire the fact that host checks have been disabled for
five
hours now.  As a side effect of this, the timeout on a ping for the host
check is causing the Latency to increase on all the services.

System is Linux kernel 2.4.20, running Nagios 1.2.  Host check in
question
is a default check_ping

Has anyone come across this before?  Is there a reason for the host
checks
being carried out regardless of the settings?

Thanks in advance for any help,

Steve

---
Steve Shipway: ITSS, University of Auckland
Email: s.shipway at auckland.ac.nz  Web: http://www.steveshipway.org/  
** We can only discover new oceans when we have the **
** courage to lose sight of the shore.              **


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