Inheritance

[Ethan Galstad]

Andreas Ericsson wrote:
> John Relph wrote:
>> Christoph Maser writes:
>>> -----BEGIN PGP SIGNED MESSAGE-----
>> See http://httpd.apache.org/docs/2.0/mod/core.html#options
>>
>>   ... if all the options on the Options directive are preceded by a +
>>   or - symbol, the options are merged. Any options preceded by a + are
>>   added to the options currently in force, and any options preceded by
>>   a - are removed from the options currently in force. 
>>
>> Which basically says you can do this:
>>
>>   hostgroups +linux-servers,web-servers
>>
> 
> I read that to mean "+linux-servers,+web-servers" which would indeed make
> sense. Negating should probably be done with '!' to be consistent with
> the rest of the nagios configuration.
> 

Yep, it basically means + (linux-servers,web-servers).  The + sign 
simply means to append the text that follows with whatever text is 
inherited.  The symbol could always be changed to prevent confusion, but 
  I think its probably the best symbol for representing what it does.

Group exclusion can be handled with adding the bang (!) symbol to a 
hostgroup name, as in:

	+ linux-servers,!web-servers

Note that the ! symbol is not currently supported in the hostgroups 
directive, but it will be shortly.

It is implied that object names that don't have a preceding (!) are 
intended to be added to the list, so there shouldn't be a need to have 
to add a plus sign before each name.


Ethan Galstad,
Nagios Developer
---
Email: nagios at nagios.org
Website: http://www.nagios.org

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