nagios host dependencies (strange) issue--it does not works as expected

[Marc Powell]

On Aug 18, 2009, at 9:15 AM, arly arly wrote:

> I am monitoring firewall too, and I am just checking PING to it and
> rount trip time
>
> with
>
> define service{
> 	use			test
>        host_name		firewall
> 	service_description	PING
> 	check_command		check_ping!200.0,40%!400.0,50%
> }

This is a service check. You probably want to set this check_command  
as the host's check_command.

> define hostdependency{
> 	host_name			firewall
> 	dependent_host_name	host_behind_firewall
> 	notification_failure_criteria   d
> 	}

Host dependencies depend on the host check, not an arbitrary service  
check on that host.

> with this I want to stop checkig ( and get just one notification about
> failure ) of host(s) behind firewal in case it is not possible to
> ping firewall .
>
> Then I blocked ping on firewall and it showed as DOWN via nagios web,
> but still I am getting correct information about
> "host behind firewall",

Did the *host* status change to critical or just the service status?  
The host's check_command must return a non-OK result for the host  
dependency to even trigger. It makes no difference what the status of  
any service on that host is if the host is still shown to be OK.

You probably don't want host dependencies at all anyway. It sounds  
like the parents directive in the dependent host definitions meets  
your needs and is much simpler to use.

http://nagios.sourceforge.net/docs/2_0/networkreachability.html

--
Marc



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