* The body size limit does not apply to subresources like pods/proxy that proxy request content to another server.

- Scheduler alpha metrics binding_duration_seconds and scheduling_algorithm_preemption_evaluation_seconds are deprecated, Both of those metrics are now covered as part of framework_extension_point_duration_seconds, the former as a PostFilter the latter and a Bind plugin. The plan is to remove both in 1.21 ([#95001](https://github.com/kubernetes/kubernetes/pull/95001), [@arghya88](https://github.com/arghya88)) [SIG Instrumentation and Scheduling]

  - **apiserver_flowcontrol_priority_level_seat_count_watermarks**: histograms of high and low watermarks of number of seats occupied by executing requests (both regular and final-delay phases included), broken down by priority_level.

- [IPv4/IPv6 dual-stack](https://kubernetes.io/docs/concepts/services-networking/dual-stack) enables the allocation of both IPv4 and IPv6 addresses to Pods and Services.
- [API Server Network Proxy](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/1281-network-proxy/README.md) going alpha in 1.16.

- github.com/armon/go-radix: [7fddfc3](https://github.com/armon/go-radix/tree/7fddfc3)
- github.com/bgentry/speakeasy: [v0.1.0](https://github.com/bgentry/speakeasy/tree/v0.1.0)
- github.com/bits-and-blooms/bitset: [v1.2.0](https://github.com/bits-and-blooms/bitset/tree/v1.2.0)
- github.com/bketelsen/crypt: [v0.0.4](https://github.com/bketelsen/crypt/tree/v0.0.4)

* PetSet has been renamed to StatefulSet.
  If you have existing PetSets, **you must perform extra migration steps** both

### Added
- github.com/antihax/optional: [v1.0.0](https://github.com/antihax/optional/tree/v1.0.0)
- github.com/benbjohnson/clock: [v1.0.3](https://github.com/benbjohnson/clock/tree/v1.0.3)
- github.com/bits-and-blooms/bitset: [v1.2.0](https://github.com/bits-and-blooms/bitset/tree/v1.2.0)
- github.com/certifi/gocertifi: [2c3bb06](https://github.com/certifi/gocertifi/tree/2c3bb06)

- VSphere releases less than 7.0u2 are not supported for in-tree vSphere volume  as of Kubernetes v1.25. Please consider upgrading vSphere (both ESXi and vCenter)  to 7.0u2 or above. ([#111255](https://github.com/kubernetes/kubernetes/pull/111255), [@divyenpatel](https://github.com/divyenpatel))

### Other (Cleanup or Flake)

- --cache-dir sets cache directory for both http and discovery, defaults to $HOME/.kube/cache ([#92910](https://github.com/kubernetes/kubernetes/pull/92910), [@soltysh](https://github.com/soltysh)) [SIG API Machinery and CLI]

* Fix cadvisor_unsupported and the crossbuild ([#35817](https://github.com/kubernetes/kubernetes/pull/35817), [@luxas](https://github.com/luxas))
* kubenet: SyncHostports for both running and ready to run pods. ([#31388](https://github.com/kubernetes/kubernetes/pull/31388), [@yifan-gu](https://github.com/yifan-gu))