- Introduced a breaking change to the `resource.k8s.io` API in its `AllocationResult` struct. This change allows a kubelet plugin for the `DynamicResourceAllocation` feature to service allocations from multiple resource driver controllers. ([#116332](https://github.com/kubernetes/kubernetes/pull/116332), [@klueska](https://github.com/klueska))...

DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

* Mark image as deliberately optional in v1 Container struct.  Many objects in the Kubernetes API inherit the container struct and only Pods require the field to be set. ([#48406](https://github.com/kubernetes/kubernetes/pull/48406), [@gyliu513](https://github.com/gyliu513))

- `klog` text output now uses JSON as encoding for structs, maps and slices. ([#117687](https://github.com/kubernetes/kubernetes/pull/117687), [@pohly](https://github.com/pohly))
- `kube-proxy` in iptables mode will now have separate `sync_full_proxy_rules_duration_seconds`\nand

EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

- Custom resource requests with `fieldValidation=Strict` consistently require `apiVersion` and `kind`, matching non-strict requests ([#109019](https://github.com/kubernetes/kubernetes/pull/109019), [@liggitt](https://github.com/liggitt))

- Fixed scheduling of **CronJob** with `@every X` schedules. ([#109250](https://github.com/kubernetes/kubernetes/pull/109250), [@d-honeybadger](https://github.com/d-honeybadger))
- Fixed strict server-side field validation treating `metadata` fields as unknown fields. ([#109268](https://github.com/kubernetes/kubernetes/pull/109268), [@liggitt](https://github.com/liggitt))

- Fixed the API comments for the `FailIndex` Job pod failure policy action. ([#121764](https://github.com/kubernetes/kubernetes/pull/121764), [@mimowo](https://github.com/mimowo))
- Go API: the `ResourceRequirements` struct was replaced with `VolumeResourceRequirements` for use with volumes. ([#118653](https://github.com/kubernetes/kubernetes/pull/118653), [@pohly](https://github.com/pohly))

- Log messages and metrics for the watch cache are now keyed by `<resource>.<group>` instead of `go` struct type. This means e.g. that `*v1.Pod` becomes `pods`. Additionally, resources that come from `CustomResourceDefinitions` are displayed as the correct resource and group, instead of `*unstructured.Unstructured`. ([#111807](https://github.com/kubern...