service_group definition

[Mueller, Karl]

I don't think hostgroups being used in service definitions will affect
the algorithm on whether you get notified or not.  Same with service
groups in 2.0.  

What we do is we have many hostgroups dedicated to just being used to
assign services.  This has no effect on how notifications for the
service go out.  The only time you would not get notifications
(typically) is when a) the host is down, or b) some kind of dependency
or other normal notification issue happens.  (For example, notifications
are off for that host or service)  

If you use hostgroups to assign services, it's no different than
assigning them to the hostnames directly.  I.e.

define service {
  hostgroup_name foo
  ...
}

is the equivalent of

define service {
  host_name foo1,foo2,foo3,...
  ...
}

which itself is the equivalent of

define service {
  host_name foo1
  ...
}

define service {
  host_name foo2
  ...
}

etc.



They are all the same thing as far as Nagios is concerned because all
the expansion is done in the templates before Nagios "runs".


Service groups in 2.0 only are different in the sense that you can't use
the "hostgroup" features (such as host escalations) and they have a nice
separate link on the left side of the main page in 2.0.  The way they
expand into host names I believe is the same as hostgroups work.

Most people use servicegroups in 2.0 to group together "interesting"
services for administrative reasons more than configuration reasons. (I
think)

Hope this helps,
Karl


-----Original Message-----
From: Vlad Didenko [mailto:vdidenko at Getcollc.com] 
Sent: Wednesday, May 12, 2004 11:28 AM
To: Mueller, Karl; nagios-users at lists.sourceforge.net
Subject: RE: [Nagios-users] service_group definition

Karl,

Thank you! We are already using hostgroups - and trying to deal with
service reconfigurations. Had a couple situations, when to hostgroup or
host to a service and the thing would be down unnoticeable. We need
service groups. OK, I guess I'll wait until 2.x.

Thank you!

Vlad.

-----Original Message-----
From: nagios-users-admin at lists.sourceforge.net
[mailto:nagios-users-admin at lists.sourceforge.net]On Behalf Of Mueller,
Karl
Sent: Wednesday, May 12, 2004 12:11 PM
To: nagios-users at lists.sourceforge.net
Subject: RE: [Nagios-users] service_group definition


Use hostgroups, instead, in 1.2.  Create a hostgroup just to assign
services to, then add hosts to that hostgroup.  Use "hostgroup_name"
instead of "host_name" in the service definition and it will work like
you expect.  We use this extensively

service groups don't exist until 2.0, I believe

Karl

-----Original Message-----
From: nagios-users-admin at lists.sourceforge.net
[mailto:nagios-users-admin at lists.sourceforge.net]On Behalf Of Vlad
Didenko
Sent: Wednesday, May 12, 2004 10:00 AM
To: nagios-users at lists.sourceforge.net
Subject: [Nagios-users] service_group definition


Hello, collagues! 
I was unable to find how to define service groups in the documentation
or in FAQ. I need to define a set of services and assign it to a group
of hosts. So that is a host gets added to a group it automatically gets
appropriate checks and if new service is added to be check in the
service group all hosts in that host group would get it. Corresponding
removals would be nice to get working as well.
I am running the 1.2 version. Any suggestions? 
Sincerely, 
Vlad. 


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