Virtual Machines - define as parent or as host dependency...

[Andrew Davis]

I'm trying to figure out the best way to do this, yet keep things as 
simple as possible.

Say I have a server called Saturn running VMWare. I'm monitoring this 
server with Nagios.
I also have three VM's on Saturn: Jupiter, Mars, and Pluto

I want to suppress all host and service alerts on Jupiter, Mars, & Pluto 
if the host Saturn is down (unreachable). I do NOT want to suppress host 
or service alerts from Jupiter, Mars, and Pluto if the VMWare processes 
(services) are down on Saturn. Basically, if my VM server is completely 
unreachable, don't bother me about its client VM's.

Am I better off doing this with a host dependency? Something like:

*define hostdependency {
	host_name			Host B
	dependent_host_name		Host C
	notification_failure_criteria	d,u
	}
*

Or am I better off defining Saturn as the parent of the VM's in the host 
config? Something like:

*define host {
	host_name               jupiter
	use                     VMs
	alias                   jupiter
	address                 172.26.251.60
	parents                 saturn, tpdmzsw1
}*

I've successfully used the "parents" directive to define network 
topology, so I would think this would work. What might be the risks of 
defining both?

-- 


   A. Davis
   Email:     nccomp at gmail.com

   "There is no limit to what a man can accomplish
    if he doesn't care who gets the credit." - Ronald Reagan

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