- `Service` of type `ExternalName` do not create an `Endpoint` anymore. ([#114814](https://github.com/kubernetes/kubernetes/pull/114814), [@panslava](https://github.com/panslava))
- `cacher`: If `ResourceVersion` is unset, the watch is now served from the underlying storage as documented. ([#115096](https://github.com/kubernetes/kubernetes/pull/115096), [@MadhavJivrajani](https://github.com/MadhavJivrajani))

- Client-go now exposes two new metrics to monitor the client-go logic that
  generate http.Transports for the clients.
  
  - `rest_client_transport_cache_entries` is a gauge metric
  with the number of existing entries in the internal cache
  
  - `rest_client_transport_create_calls_total` is a counter
  that increments each time a new transport is created, storing

   ([#122571](https://github.com/kubernetes/kubernetes/pull/122571), [@p0lyn0mial](https://github.com/p0lyn0mial))
- Added the `apiserver_watch_cache_read_wait` metric to measure the watch cache impact on request latency.
   ([#123190](https://github.com/kubernetes/kubernetes/pull/123190), [@padlar](https://github.com/padlar))

- Added `apiserver_envelope_encryption_dek_cache_filled` to measure number of records in data encryption key (DEK) cache. ([#119878](https://github.com/kubernetes/kubernetes/pull/119878), [@ritazh](https://github.com/ritazh))