When `add_kubernetes_metadata` is used with {beatname_uc}, it uses the `ip_port`
indexer and the `fields` matcher with the `metricset.host` field. So events that
contain a `metricset.host` field are enriched with metadata of the pods that
exposes the same port in the same IP.

This behaviour can be disabled by disabling default indexers and matchers in the
configuration:
[source,yaml]
-------------------------------------------------------------------------------
processors:
  - add_kubernetes_metadata:
      default_indexers.enabled: false
      default_matchers.enabled: false
-------------------------------------------------------------------------------
