* Added `spec.additionalPrinterColumns` to CRDs to define server side printing columns. ([#60991](https://github.com/kubernetes/kubernetes/pull/60991), [@sttts](https://github.com/sttts))
* Added CRD Versioning with NOP converter ([#63830](https://github.com/kubernetes/kubernetes/pull/63830), [@mbohlool](https://github.com/mbohlool))

<pre>
*Point(p)        // same as *(Point(p))
(*Point)(p)      // p is converted to *Point
&lt;-chan int(c)    // same as &lt;-(chan int(c))
(&lt;-chan int)(c)  // c is converted to &lt;-chan int
func()(x)        // function signature func() x
(func())(x)      // x is converted to func()
(func() int)(x)  // x is converted to func() int
func() int(x)    // x is converted to func() int (unambiguous)
</pre>

<p>

- Add table convertor to component status. ([#85174](https://github.com/kubernetes/kubernetes/pull/85174), [@zhouya0](https://github.com/zhouya0))

- Fixed a race condition serving `OpenAPI` content ([#117705](https://github.com/kubernetes/kubernetes/pull/117705), [@Jefftree](https://github.com/Jefftree))
- Fixed a regression in `1.27.0` that resulted in `missing metadata in converted object` errors when modifying objects for multi-version custom resource definitions with a conversion strategy of `None`. ([#117301](https://github.com/kubernetes/kubernetes/pull/117301), [@ncdc](https://github.com/ncdc))

- `watch.Until` now works for long durations. ([#67350](https://github.com/kubernetes/kubernetes/pull/67350), [@tnozicka](https://github.com/tnozicka))
- Added duration metric for CRD webhook converters. ([#74376](https://github.com/kubernetes/kubernetes/pull/74376), [@mbohlool](https://github.com/mbohlool))

does not support protobuf encoding, if you roll back to 1.5 after upgrading to
protobuf you will be forced to restore from backup, and you will lose any changes
since you converted to protobuf.  After conversion to protobuf, you should
validate the correct operation of your cluster thoroughly before returning it
to normal operation.

### Structured logging graduate to Beta

Structured logging reached its Beta milestone. Most log messages from kubelet and kube-scheduler have been converted. Users are encouraged to try out JSON output or parsing of the structured text format and provide feedback on possible solutions for the open issues, such as handling of multi-line strings in log values.

- Clients may now request that API objects are converted to the `v1.Table` and `v1.PartialObjectMetadata` forms for generic access to objects. ([#77448](https://github.com/kubernetes/kubernetes/pull/77448), [@smarterclayton](https://github.com/smarterclayton))

- The `EndpointSlice` API is now GA. The `EndpointSlice` topology field has been removed from the GA API and will be replaced by a new per Endpoint Zone field. If the topology field was previously used, it will be converted into an annotation in the v1 Resource. The `discovery.k8s.io/v1alpha1` API is removed. ([#99662](https://github.com/kubernetes/kubernetes/pull/99662), [@swetharepakula](https://github.com/swetharepakula))

- The systemd config files are now reloaded before kubelet starts, so changes can take effect([#65702](https://github.com/kubernetes/kubernetes/pull/65702), [@mborsz](https://github.com/mborsz))
- Hostnames are now converted to lowercase before being used for node lookups in the kubernetes-worker charm. ([#65487](https://github.com/kubernetes/kubernetes/pull/65487), [@dshcherb](https://github.com/dshcherb))