[PATCH] new feature: automatic services for hosts

[Ignacio Goyret]

At 07:00 AM 11/19/2008 +0100, Hendrik BŠäcker wrote:
>> The patch adds a new directive "services" to the "host" definitions.
>> This new directive lists one or more "service" templates which
>> are used to automatically create "service" definitions for
>> the host.
>
>I've just did a fast read on your patch. Nice work that you patched the
>documentiotion, too.

Thanks.

BTW, after I sent the patch, my nagios servers started abending.
It seems that I "cleaned" up the patch too much. :-(
I'll send an updated patch later in the week, once I'm 100%
positive that it will be ok. I even found a better place to do
the auto-instantiation that allows me to handle host templates
as well.

>But to the patch: Why do you do it in a host atomic way while it might
>be less work when doing it on hostgroups?

Actually, in my experience, it would be a *lot* more work to do
the same with hostgroups as I had to define one hostgroup per
service "kind" that I needed to monitor: 1 service + 1 hostgroup.

Using this new keyword, I only have to define one service template
for however many hosts happen to need that service check.

It also allows me to use hostgroups to group hosts by categories
like mail servers, web servers, compile farm, sybase server, etc.

Let me give you an example. We have a few dozen NetApps.
All these netapps have the exact same function: file servers.
But each one has a different number of volumes defined and in some
cases, the volume names are not even consistent: eg, one of the
netapps has vol0, vol1 and vol3 defined (vol2 was removed a while
back) while others have the sequence vol0, vol1, vol2 and vol3;
others have a single volume and others have a much larger number
of volumes.

If I were to use hostgroups, I would have to define a hostgroup
per volume name, but then I'd lose the possibility of
classification by function (well, not _lose_ but it would get
clouded among hundreds of artifact hostgroups, required only
by the config files).

Makes sense?
-Ignacio


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