More config file madness add intersection to group operations

[Ethan Galstad]

John Rouillard wrote:
> Hi all:
> 
> Is 3.0 going to support the intersection operation between hostgroups?
> Currently you can do:
> 
>    web_servers,!boston
> 
> to get web servers that are not in boston, but trying to get web
> servers that are in boston means adding every host to a site (e.g. boston,
> miami, london, orlando) and then:
> 
>   web_servers, !orlando, !miami, !london
> 
> this is a maintenance nightmare when adding new sites and doesn't
> express what you want. (I chose a simple example here. In some of my
> configs I have 10 or 15 different hostgroups.)
> 
> What I would like to see is support for the intersection operation.
> So web_servers in boston would be:
> 
>    web_servers, &boston
> 
> and production tier 1 web servers in boston that are not dns servers
> would be
> 
>    web_servers, &boston, &production_tier_1, !dns_servers
> 
> The addition of intersection provides all the standard operations of
> set theory: intersection, difference and union.
> 
> 				-- rouilj
> John Rouillard
> ===========================================================================
> My employers don't acknowledge my existence much less my opinions.
> 

I don't have any plans to add intersection support, as it would increase 
the complexity of the code quite a bit.   You can accomplish what you 
need by using smaller hostgroups (that don't get registered) that 
contain distinct sets of hosts and then use the new subgroup feature in 
Nagios 3 to define larger hostgroups that contain members of the smaller 
groups you defined.

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

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642