hostgroups and service dependencies?

[Frost, Mark {PBG}]

I'm just starting to get into service dependencies.  My problem is that
I don't quite see how I can get around doing it individually for each
and every service and host needed.

An example is if I've got 100 Windows servers all configured to be part
of a hostgroup.  Then I've got a 


		define service {
		        hostgroup_name
prod_windows_servers
		        service_description             NRPE Service
		        check_command                   NRPE Service
		        use                             Production
Windows Service
		}

		define service {
		        hostgroup_name
prod_windows_servers
		        service_description             CPU Load
		        check_command
check_windows_load!90%!90%
		        use                             Production
Windows Service
		}

		define service {
		        hostgroup_name
prod_windows_servers
		        service_description             C: Drive
		        check_command
check_windows_disk!C:!90%!90%
		        use                             Production
Windows Service
		}

where the 100 servers are all part of the 'prod_windows_servers"
hostgroup.  Here I can list the checks nice and compactly and add new
hosts/checks merely by putting them in that hostgroup.

I would like to make service checks on these boxes dependent on the
"NRPE Service" check above.  So if the NRPE service was not responding,
Nagios wouldn't bother sending me alerts about all the other things on
that box it could not reach.

The object definitions seem to say that I can do

		define servicedependency {
		        hostgroup_name
prod_windows_servers
		        service_description             NRPE Service
		        dependent_hostgroup_name
prod_windows_servers
		        dependent_service_description   C: Drive
		        execution_failure_criteria      n
		        notification_failure_criteria   w,u,c
		}

I'm assuming that this is supposed to match up each
'prod_windows_servers' entry with its matching entry rather than making
each server dependent on this servers from *every* other hostgroup
member?

Just to see, I tried this out and when I did a pre-flight check it took
53 seconds (checking the host and service dependencies) when it normally
runs instantly.

I'm not sure this does what I want.  Even so, I don't know that I can
handle the 53 second wait which I imagine would escalate for each
service I defined in this way).  The only other route I can think of is
to create a unique servicedepency definition for each of these.  That's
100 x n dependency definitions, where n is the number of other services
I'm checking on each of these boxes.

Am I looking at this the wrong way?  Is there an easier way to do this?

Thanks

Mark


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