- Rename `PreemptionByKubeScheduler` to `PreemptionByScheduler` ([#114623](https://github.com/kubernetes/kubernetes/pull/114623), [@Huang-Wei](https://github.com/Huang-Wei))
- API: resource.k8s.io/v1alpha1.PodScheduling was renamed to resource.k8s.io/v1alpha2.PodSchedulingContext. ([#116556](https://github.com/kubernetes/kubernetes/pull/116556), [@pohly](https://github.com/pohly)) [SIG API Machinery, Apps, Auth, CLI, Node, Scheduling and Testing]

\"else\", \"for\", \"function\", \"if\",\n\t  \"import\", \"let\", \"loop\", \"package\", \"namespace\", \"return\".\nExamples:\n  - Rule accessing a property named \"namespace\": {\"rule\": \"self.__namespace__ > 0\"}\n  - Rule accessing a property named \"x-prop\": {\"rule\": \"self.x__dash__prop > 0\"}\n  - Rule accessing a property named \"redact__d\": {\"rule\": \"self.redact__underscores__d > 0\"}\n\nEquality on arrays with x-kubernetes-list-type of 'set' or 'map' ignores element order, i.e....

* Remove the deprecated vsphere kube-up. ([#39140](https://github.com/kubernetes/kubernetes/pull/39140), [@kerneltime](https://github.com/kerneltime))

### kubeadm

\"function\", \"if\",\n\t  \"import\", \"let\", \"loop\", \"package\", \"namespace\", \"return\".\nExamples:\n  - Expression accessing a property named \"namespace\": {\"Expression\": \"object.__namespace__ > 0\"}\n  - Expression accessing a property named \"x-prop\": {\"Expression\": \"object.x__dash__prop > 0\"}\n  - Expression accessing a property named \"redact__d\": {\"Expression\": \"object.redact__underscores__d > 0\"}\n\nEquality on arrays with list type of 'set' or 'map' ignores element order,...

  - `node_cpu_usage_seconds_total`
  - `node_memory_working_set_bytes`
  - `pod_cpu_usage_seconds_total`
  - `pod_memory_working_set_bytes`
  - `resource_scrape_error`
  
  Deprecated (renamed) `scrape_error` in favor of `resource_scrape_error` ([#116897](https://github.com/kubernetes/kubernetes/pull/116897), [@Richabanker](https://github.com/Richabanker)) [SIG Architecture, Instrumentation, Node and Testing]

- Kube-apiserver: gzip compression switched from level 4 to level 1 to improve large list call latencies in exchange for higher network bandwidth usage (10-50% higher). This increases the headroom before very large unpaged list calls exceed request timeout limits. ([#112400](https://github.com/kubernetes/kubernetes/pull/112400), [@shyamjvs](https://github.com/shyamjvs)) [SIG API Machinery]

- Enabled use of pods with volumes and user namespaces. The feature gate was renamed from `UserNamespacesStatelessPodsSupport` to `UserNamespacesSupport`. ([#118691](https://github.com/kubernetes/kubernetes/pull/118691), [@giuseppe](https://github.com/giuseppe))

### Bug or Regression

- Kube-apiserver: gzip compression switched from level 4 to level 1 to improve large list call latencies in exchange for higher network bandwidth usage (10-50% higher). This increases the headroom before very large unpaged list calls exceed request timeout limits. ([#112401](https://github.com/kubernetes/kubernetes/pull/112401), [@shyamjvs](https://github.com/shyamjvs)) [SIG API Machinery]

The Horizontal Pod Autoscaler changes include support for status conditions, and autoscaling on memory and custom metrics.

* The metrics APIs, `custom-metrics.metrics.k8s.io` and `metrics`, were moved from `v1alpha1` to `v1beta1`, and renamed to `custom.metrics.k8s.io` and `metrics.k8s.io`, respectively. If you have deployed a custom metrics adapter, ensure that it supports the new API version. If you have deployed Heapster in aggregated API server mode, upgrade Heapster to support the...

* Adding vishh as an reviewer/approver for hack directory ([#54007](https://github.com/kubernetes/kubernetes/pull/54007), [@vishh](https://github.com/vishh))