-  Fixed a bug that could cause CoreDNS to stop updating service records.
  -  Fixed a bug in the forward plugin where only the first upstream server is always selected no matter which policy is set.
  -  Remove already deprecated options `resyncperiod` and `upstream` in the Kubernetes plugin.

- Graduating `pending_pods`, `preemption_attempts_total`, `preemption_victims` and `schedule_attempts_total` metrics to stable. Also `e2e_scheduling_duration_seconds` is renamed to `scheduling_attempt_duration_seconds` and the latter is graduated to stable. ([#105941](https://github.com/kubernetes/kubernetes/pull/105941), [@rezakrimi](https://github.com/rezakrimi)) [SIG Instrumentation, Scheduling and Testing]

  balancer notices that it has been killed. ([#97238](https://github.com/kubernetes/kubernetes/pull/97238), [@andrewsykim](https://github.com/andrewsykim))

### GCP

- [stackdriver addon] Bumped prometheus-to-sd to v0.5.0 to pick up security fixes.
[fluentd-gcp addon] Bumped fluentd-gcp-scaler to v0.5.1 to pick up security fixes.
[fluentd-gcp addon] Bumped event-exporter to v0.2.4 to pick up security fixes.
[fluentd-gcp addon] Bumped prometheus-to-sd to v0.5.0 to pick up security fixes.

* Fix third party APIResource reporting ([#29724](https://github.com/kubernetes/kubernetes/pull/29724), [@brendandburns](https://github.com/brendandburns))
* speed up RC scaler ([#30383](https://github.com/kubernetes/kubernetes/pull/30383), [@deads2k](https://github.com/deads2k))

    * This feature requires a **Node Drain** prior to upgrade failing which pods will be restarted if possible or terminated if...

* [fluentd-gcp addon] Bump fluentd-gcp-scaler to v0.5.2 to pick up security fixes. ([#76762](https://github.com/kubernetes/kubernetes/pull/76762), [@serathius](https://github.com/serathius))