* Increase Horizontal Pod Autoscaler default update interval (30s -> 15s). It will improve HPA reaction time for metric changes. ([#68021](https://github.com/kubernetes/kubernetes/pull/68021), [@krzysztof-jastrzebski](https://github.com/krzysztof-jastrzebski))
* Increase scrape frequency of metrics-server to 30s ([#68127](https://github.com/kubernetes/kubernetes/pull/68127), [@serathius](https://github.com/serathius))

- Scheduler's assumed pods have 2min instead of 30s to receive nodeName pod updates ([#106633](https://github.com/kubernetes/kubernetes/pull/106633), [@ahg-g](https://github.com/ahg-g)) [SIG Scheduling]

## Dependencies

### Added
_Nothing has changed._

- util/initsystem: Added support for the OpenRC init system ([#73101](https://github.com/kubernetes/kubernetes/pull/73101), [@oz123](https://github.com/oz123))
- Default TTL for DNS records in kubernetes zone has been changed from 5s to 30s to keep consistent with old dnsmasq based kube-dns. The TTL can be customized with command `kubectl edit -n kube-system configmap/coredns`. ([#76238](https://github.com/kubernetes/kubernetes/pull/76238), [@Dieken](https://github.com/Dieken))

  - `failurePolicy` default changed from `Ignore` to `Fail` for v1
  - `matchPolicy` default changed from `Exact` to `Equivalent` for v1
  - `timeout` default changed from `30s` to `10s` for v1
  - `sideEffects` default value is removed, and the field made required, and only `None` and `NoneOnDryRun` are permitted for v1

- Updated `etcd` version to `3.5.8`. ([#117335](https://github.com/kubernetes/kubernetes/pull/117335), [@kkkkun](https://github.com/kkkkun))
- Updated apiserver metric `request_filter_duration_seconds` to include a 10s, 15s and 30s bucket.
Updated apiserver metric `request_wait_duration_seconds` to include a 15s bucket. ([#118945](https://github.com/kubernetes/kubernetes/pull/118945), [@andrewsykim](https://github.com/andrewsykim))

- The scheduler's assumed pods have 2min instead of 30s to receive nodeName pod updates ([#106632](https://github.com/kubernetes/kubernetes/pull/106632), [@ahg-g](https://github.com/ahg-g)) [SIG Scheduling]

## Dependencies

### Added
_Nothing has changed._

- Scheduler's assumed pods have 2min instead of 30s to receive nodeName pod updates ([#106686](https://github.com/kubernetes/kubernetes/pull/106686), [@ahg-g](https://github.com/ahg-g)) [SIG Scheduling]

## Dependencies

### Added
_Nothing has changed._