Excluding a hostgroup from a service check

[Jim Avery]

2009/4/9 Edward Trochim <ejtrochim at alaska.edu>:
> I have a service template that specifies several host groups and one
> host to check. One of the services that inherits this template should
> not be executed by one of the host groups defined. I read the object
> tricks documentation page and found that I could include a ! before
> the name in a hostgroup_name definition in the service definition to
> exclude that hostgroup from that service. However, when I do that
> nagios excludes all hostgroups from the list from running that service.
>
> That explanation of the problem might be a little thick so here is an
> abbreviated example.
>
> I have a service template like this:
>
> define service{
>         name                           standard-check
>         use                                    generic-service
>         hostgroup_name         hostgroup1, hostgroup2, hostgroup3,\
>                                                hostgroup4, hostgroup5, hostgroup6,\
>                                                hostgroup7
>         host_name                      host1
>         servicegroups          standard_checks
>         register                               0
> }
>
> And a service definition like this. I want to exclude hostgroup5 from
> this one service definition:
>
> define service{
>         use                                    standard-check
>         hostgroup_name         !hostgroup5
>         service_description    Disk Space
> }
>
> Instead of doing what I want this excludes every hostgroup defined in
> the template. host1 still gets the service though.
>
> I am currently running nagios version 3.0.6.
>
> Is this a bug in nagios or am I misunderstanding the way this should
> behave?
>
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The line "hostgroup_name         !hostgroup5" will completely
supercede anything previously specified for hostgroup_name in the
template.

If you want it to be processed as an addition to what was in your
template, you need to prefix the list with a "+".  So in your service
definition, you need to put:

  hostgroup_name         +!hostgroup5

I've only ever used this syntax myself for specifying additional
contacts, but I guess the logic would be the same for hostgroups too.
Give it a try anyway and come back if it doesn't work.

I assume you're using Nagios 3.  I don't think use of "+" in this way
was possible in version 2.

Cheers,

Jim

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