- A `create` or `update` API request with duplicate items in a keyed list no longer wipes out managedFields. Examples include env var entries with the same name, or port entries with the same containerPort in a pod spec.
  - A server-side apply request that makes unrelated changes to an object which has duplicate items in a keyed list no longer fails, and leaves the existing duplicate items as-is.

  `hostAliases` fields to mark the fields used as keys in those lists as either defaulted
  or required. ([#124553](https://github.com/kubernetes/kubernetes/pull/124553), [@pmalek](https://github.com/pmalek))

### Container Images

All container images are available as manifest lists and support the described
architectures. It is also possible to pull a specific architecture directly by
adding the "-$ARCH" suffix  to the container image name.

name | architectures
---- | -------------

- Fixes a 1.30.0 regression in openapi descriptions of imagePullSecrets and hostAliases fields to mark the fields used as keys in those lists as either defaulted or required. ([#124694](https://github.com/kubernetes/kubernetes/pull/124694),...

- Kubeadm: fix wrong member list reported when removing an etcd member ([#127963](https://github.com/kubernetes/kubernetes/pull/127963), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

- The synthetic "Bookmark" event for the watch stream requests will now include a new annotation: `kubernetes.io/initial-events-list-blueprint`. THe annotation contains an empty, versioned list that is encoded in the requested format (such as protobuf, JSON, or CBOR), then base64-encoded and stored as a string. ([#127587](https://github.com/kubernetes/kubernetes/pull/127587), [@p0lyn0mial](https://github.com/p0lyn0mial))...

- Updates `kubectl kustomize` and `kubectl apply -k` to Kustomize v4.5.4 ([#108994](https://github.com/kubernetes/kubernetes/pull/108994), [@KnVerey](https://github.com/KnVerey))
- When invoked with `-list-images`, the `e2e.test` binary now also lists the images that might be needed for storage tests. ([#108458](https://github.com/kubernetes/kubernetes/pull/108458), [@pohly](https://github.com/pohly))

### Bug or Regression

- Fix list cost estimation in Priority and Fairness for list requests with metadata.name specified. ([#112557](https://github.com/kubernetes/kubernetes/pull/112557), [@marseel](https://github.com/marseel)) [SIG API Machinery]

- 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. ([#112299](https://github.com/kubernetes/kubernetes/pull/112299), [@shyamjvs](https://github.com/shyamjvs))

  - *apiserver_storage_list_evaluated_objects_total*: Counter of objects tested in the course of serving a LIST request from etcd, broken down by resource
  - *apiserver_storage_list_returned_objects_total*: Counter of objects returned for a LIST request from etcd, broken down by resource ([#104983](https://github.com/kubernetes/kubernetes/pull/104983), [@MikeSpreitzer](https://github.com/MikeSpreitzer))