- On single-stack configured (IPv4 or IPv6, but not both) clusters, Services which are both headless (no clusterIP) and selectorless (empty or undefined selector) will report `ipFamilyPolicy RequireDualStack` and will have entries in `ipFamilies[]` for both IPv4 and IPv6.  This is a change from alpha, but does not have any impact on the manually-specified Endpoints and EndpointSlices for the Service. (...

- Structured logging of NamespacedName was inconsistent with klog.KObj. Now both use lower case field names and namespace is optional. ([#117238](https://github.com/kubernetes/kubernetes/pull/117238), [@pohly](https://github.com/pohly)) [SIG API Machinery, Architecture and Instrumentation]

## Dependencies

## Changelog since v1.9.10

### Action Required

* action required: the API server and client-go libraries have been fixed to support additional non-alpha-numeric characters in UserInfo "extra" data keys. Both should be updated in order to properly support extra data containing "/" characters or other characters disallowed in HTTP headers. ([#65799](https://github.com/kubernetes/kubernetes/pull/65799), [@dekkagaijin](https://github.com/dekkagaijin))

## Changelog since v1.10.6

### Action Required

* action required: the API server and client-go libraries have been fixed to support additional non-alpha-numeric characters in UserInfo "extra" data keys. Both should be updated in order to properly support extra data containing "/" characters or other characters disallowed in HTTP headers. ([#65799](https://github.com/kubernetes/kubernetes/pull/65799), [@dekkagaijin](https://github.com/dekkagaijin))

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

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

* falls back to parse Docker runtime version as generic if not semver ([#54040](https://github.com/kubernetes/kubernetes/pull/54040), [@dixudx](https://github.com/dixudx))
* BUG FIX: Check both name and ports for azure health probes ([#56918](https://github.com/kubernetes/kubernetes/pull/56918), [@feiskyer](https://github.com/feiskyer))



# v1.8.5

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

- Fixed a regression in kube-proxy where it might refuse to start if given
  single-stack IPv6 configuration options on a node that has both IPv4 and
  IPv6 IPs. ([#121008](https://github.com/kubernetes/kubernetes/pull/121008), [@danwinship](https://github.com/danwinship)) [SIG Network]

## Urgent Upgrade Notes
### (No, really, you MUST read this before you upgrade)
#### Cluster Lifecycle