- Adds alpha metrics `apiserver_peer_proxy_errors_total` and `apiserver_peer_discovery_sync_errors_total` to apiserver to track errors encountered in peer proxying and peer discovery ([#137065](https://github.com/kubernetes/kubernetes/pull/137065), [@richabanker](https://github.com/richabanker)) [SIG API Machinery]

- Fix a bug in cronjob controller where already created jobs...

- The iptables mode of kube-proxy now tracks accepted packets that are destined for node-ports on localhost by introducing `kubeproxy_iptables_localhost_nodeports_accepted_packets_total` metric.

#### Application Deployment

* DaemonSet, Deployment, ReplicaSet, and StatefulSet objects are now persisted in etcd in apps/v1 format ([#58854](https://github.com/kubernetes/kubernetes/pull/58854), [@liggitt](https://github.com/liggitt))

* YAMLDecoder Read now tracks rest of buffer on io.ErrShortBuffer ([#58817](https://github.com/kubernetes/kubernetes/pull/58817), [@karlhungus](https://github.com/karlhungus))

- A new kubelet metric `image_pull_duration_seconds` was added. The metric tracks the duration (in seconds) it takes for an image to be pulled, including the time spent in the waiting queue of image puller. The metric is broken down by bucketed image size. ([#121719](https://github.com/kubernetes/kubernetes/pull/121719), [@rui...

- Fixed an issue in the Windows kube-proxy (winkernel) where IPv4 and IPv6 Service load balancers could be incorrectly shared, causing broken dual-stack Service behavior. The kube-proxy now tracks load balancers per IP family, enabling correct support for PreferDualStack and RequireDualStack Services on Windows nodes. ([#136373](https://github.com/kubernetes/kubernetes/pull/136373), [@princepereira](https://github.com/princepereira)) [SIG Network...

### Feature

- A new Priority and Fairness metric 'apiserver_flowcontrol_work_estimate_seats_samples' has been added that tracks the estimated seats associated with a request. ([#106628](https://github.com/kubernetes/kubernetes/pull/106628), [@tkashem](https://github.com/tkashem))

* Implements rolling update for StatefulSets. Updates can be performed using the RollingUpdate, Paritioned, or OnDelete strategies. OnDelete implements the manual behavior from 1.6. status now tracks  ([#46669](https://github.com/kubernetes/kubernetes/pull/46669), [@kow3ns](https://github.com/kow3ns))

- `kubeproxy_conntrack_reconciler_deleted_entries_total` metric can be used to track cumulative sum of conntrack flows cleared by reconciler. ([#130204](https://github.com/kubernetes/kubernetes/pull/130204), [@aroradaman](https://github.com/aroradaman))