- Kubeadm: fix an issue with the kube-proxy container env. variables ([#84888](https://github.com/kubernetes/kubernetes/pull/84888), [@neolit123](https://github.com/neolit123))
- Utilize diagnostics tool to dump GKE windows test logs ([#83517](https://github.com/kubernetes/kubernetes/pull/83517), [@YangLu1031](https://github.com/YangLu1031))

* IPVS proxier mode now support connection based graceful termination. ([#66012](https://github.com/kubernetes/kubernetes/pull/66012), [@Lion-Wei](https://github.com/Lion-Wei))
* add more logging for azure disk diagnostics ([#70012](https://github.com/kubernetes/kubernetes/pull/70012), [@andyzhangx](https://github.com/andyzhangx))

* fix 'kubeadm upgrade' infinite loop waiting for pod restart ([#69886](https://github.com/kubernetes/kubernetes/pull/69886), [@bart0sh](https://github.com/bart0sh))
* add more logging for azure disk diagnostics ([#70012](https://github.com/kubernetes/kubernetes/pull/70012), [@andyzhangx](https://github.com/andyzhangx))

* fix network setup in hack/local-up-cluster.sh (https://github.com/kubernetes/kubernetes/pull/60431) ([#60633](https://github.com/kubernetes/kubernetes/pull/60633), [@pohly](https://github.com/pohly))
    * better error diagnostics in hack/local-up-cluster.sh output
* Add prometheus cluster monitoring addon to kube-up ([#62195](https://github.com/kubernetes/kubernetes/pull/62195), [@serathius](https://github.com/serathius))

- New metric `kubelet_pleg_last_seen_seconds` to aid diagnosis of PLEG not healthy issues. ([#86251](https://github.com/kubernetes/kubernetes/pull/86251), [@bboreham](https://github.com/bboreham)) [SIG Node]

### Other (Bug, Cleanup or Flake)