// to SingleStack. Services can be "SingleStack" (a single IP family),
  // "PreferDualStack" (two IP families on dual-stack configured clusters or
  // a single IP family on single-stack clusters), or "RequireDualStack"
  // (two IP families on dual-stack configured clusters, otherwise fail). The
  // ipFamilies and clusterIPs fields depend on the value of this field. This
  // field will be wiped when updating a service to type ExternalName.

- With this new stable feature, Kubernetes supports the scaling of containerized applications with Azure VMSS, including the ability to integrate it with cluster-autoscaler to automatically adjust the size of the Kubernetes clusters based on the same conditions.

### SIG-cli

## Before Upgrading

Consider the following changes, limitations, and guidelines before you upgrade:

* The kubelet now fails if swap is enabled on a node. To override the default and run with /proc/swaps on, set `--fail-swap-on=false`. The experimental flag `--experimental-fail-swap-on` is deprecated in this release, and will be removed in a future release.

- [`KT-57206`](https://youtrack.jetbrains.com/issue/KT-57206) K2: false-positive val reassignment error on synthetic property from generic class with overridden getter but not setter
- [`KT-56519`](https://youtrack.jetbrains.com/issue/KT-56519) K2: Compiler crash on a function reference on companion receiver that inherits from outer class

- Fixed a bug that prevents kubectl to validate CRDs with schema using x-kubernetes-preserve-unknown-fields on object fields.
  Fix kubectl SchemaError on CRDs with schema using x-kubernetes-preserve-unknown-fields on array types. ([#96563](https://github.com/kubernetes/kubernetes/pull/96563), [@gautierdelorme](https://github.com/gautierdelorme)) [SIG API Machinery and Testing]

### Azure

SIG Azure worked on improvements in the cloud provider, including significant work on the Azure Load Balancer implementation.

### Cluster Lifecycle

- Fixes the `should receive events on concurrent watches in same order` conformance test to work properly on clusters that auto-create additional configmaps in namespaces ([#101950](https://github.com/kubernetes/kubernetes/pull/101950), [@liggitt](https://github.com/liggitt)) [SIG API Machinery and Testing]

### Bug or Regression

* Fixes issue where an apiserver on 1.9 and controller-manager on 1.10 can cause volume provisioning and binding to fail. ([#71286](https://github.com/kubernetes/kubernetes/pull/71286), [@msau42](https://github.com/msau42))

### Windows
- Adds Windows Server build information as a label on the node. ([#84472](https://github.com/kubernetes/kubernetes/pull/84472), [@gab-satchi](https://github.com/gab-satchi))
- Fixes kube-proxy bug accessing self nodeip:port on windows ([#83027](https://github.com/kubernetes/kubernetes/pull/83027), [@liggitt](https://github.com/liggitt))

    * a PersistentVolumeClaim without a StorageClass annotation now results in
    * automatic provisioning of storage (GCE PersistentDisk on Google Cloud, AWS
    * EBS on AWS, and Cinder on OpenStack). In previous versions of Kubernetes
    * a PersistentVolumeClaim without a StorageClass annotation on these cloud
    * platforms would be satisfied by manually-created PersistentVolume objects.