icinga2/doc/3.05-using-templates.md

Using Templates

Templates may be used to apply a set of identical attributes to more than one object:

template Service "generic-service" {
  max_check_attempts = 3
  check_interval = 5m
  retry_interval = 1m
  enable_perfdata = true
}

object Service "ping4" {
  import "generic-service"

  host_name = "localhost"
  check_command = "ping4"
}

object Service "ping6" {
  import "generic-service"

  host_name = "localhost"
  check_command = "ping6"
}

In this example the ping4 and ping6 services inherit properties from the template generic-service.

Objects as well as templates themselves can import an arbitrary number of templates. Attributes inherited from a template can be overridden in the object if necessary.