- Simple script based hyperkube image that bundles all the necessary binaries. This is an equivalent replacement for the image based on the go based hyperkube command + image. ([#84662](https://github.com/kubernetes/kubernetes/pull/84662), [@dims](https://github.com/dims))

- The following deprecated metrics are removed, please convert to the corresponding metrics:
  - The following replacement metrics are available from v1.14.0:
      - `rest_client_request_latency_seconds` -> `rest_client_request_duration_seconds`
      - `scheduler_scheduling_latency_seconds` -> `scheduler_scheduling_duration_seconds `

- Kubeadm: remove the deprecated command `kubeadm config view`. A replacement for this command is `kubectl get cm -n kube-system kubeadm-config -o=jsonpath="{.data.ClusterConfiguration}"` ([#102071](https://github.com/kubernetes/kubernetes/pull/102071), [@neolit123](https://github.com/neolit123))

and components that are required to support the new version of the Horizontal Pod
Autoscaler API: the resource metrics API, custom metrics API, and
metrics-server, which is the new replacement for Heapster in the default monitoring
pipeline.

[SIG Instrumentation]: https://github.com/kubernetes/community/tree/master/sig-instrumentation

### SIG Multi-cluster (formerly known as SIG Federation)

These extension points can now be abstracted away due to their irrelevance for most users.

### CSI Migration updates

CSI Migration enables the replacement of existing in-tree storage plugins such as `kubernetes.io/gce-pd` or `kubernetes.io/aws-ebs` with a corresponding CSI driver.
If CSI Migration is working properly, Kubernetes end users shouldn’t notice a difference.

### Registry
* Use daemonset in docker registry add on ([#35582](https://github.com/kubernetes/kubernetes/pull/35582), [@surajssd](https://github.com/surajssd))
* contribute deis/registry-proxy as a replacement for kube-registry-proxy ([#35797](https://github.com/kubernetes/kubernetes/pull/35797), [@bacongobbler](https://github.com/bacongobbler))

## External Dependency Version Information

  - `kubeadm config upload` has been deprecated, as its replacement is now graduated. Please use `kubeadm init phase upload-config` instead. ([#77946](https://github.com/kubernetes/kubernetes/pull/77946), [@Klaven](https://github.com/Klaven))

ation-past-present-and-future/), and with the release of v1.25, it has been removed. The updates required to improve its usability would have introduced breaking changes, so it became necessary to remove it in favor of a more friendly replacement. That replacement is [Pod Security Admission](https://kubernetes.io/docs/concepts/security/pod-security-admission/), which graduates to Stable with this release. If you are currently relying on PodSecurityPolicy, please follow the instructions for [migration...

- Promoted Job Pod Replacement Policy to general availability. The `JobPodReplacementPolicy` feature gate was locked to `true` and will be removed in a future Kubernetes release. ([#132173](https://github.com/kubernetes/kubernetes/pull/132173), [@dejanzele](https://github.com/dejanzele))...

- Always create configmaps/extensions-apiserver-authentication from kube-apiserver. ([#67694](https://github.com/kubernetes/kubernetes/pull/67694), [@sttts](https://github.com/sttts))
- Switched certificate data replacement from "REDACTED" to "DATA+OMITTED" ([#66023](https://github.com/kubernetes/kubernetes/pull/66023), [@ibrasho](https://github.com/ibrasho))