Multiple Inheritance

[Caylan Van Larson]

Howdy,

I'm trying to design a multiple-inheritance structure for a new Nagios  
3 setup.  Consider the following:


define service{
  name                            oracle
  use                             fast,default
  service_description             Oracle Server
  contact_groups                  +oracle_dba
  check_command                   check_nrpe!check_oracle
  register                        0
}

define service{
  name                            fast
  retry_check_interval            2
  normal_check_interval           5
  register                        0
}

define service{
  name                            production
  use                             default
  contact_groups                  prod_responders
  register                        0
}

define service{
  name                            filesystem
  use                             slow,default
  contact_groups			 +storage_admins
  register                        0
}

define service{
  name                            slow
  normal_check_interval           30
  register                        0
}

In this scenario "default" contains the default definitions, this is  
sometimes written as "generic-service."

Now, for some examples:  Production Oracle

define service{
  use				 oracle,production
  host_name			 lnx50
}

I expect by using production that prod_responders replaces the default  
contact_group.  Next, the additive (+) inheritance of oracle_dba  
should create a union between the two contact_groups.  Will this  
declaration work as expected?

Next... an Production Oracle Filesystem

define service{
  use				 filesystem,oracle,production
  service_description             Filesystem: /oradata
  host_name			 lnx50
  check_command                   check_nrpe!check_oradata
}


I only partially understand the precedence at work here.  I understand  
that it will operate with a "slow" check interval, but what about the  
contact_groups?  Since "filesystem" brings in the default early (with  
it's own default contact groups), then does it ever add the  
contact_group oracle_dba, or does it all get replaced by  
production_responders?

Thoughts?

---

Caylan


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