- Mark `net.ipv4.ip_unprivileged_port_start` as safe `sysctl`. ([#103326](https://github.com/kubernetes/kubernetes/pull/103326), [@pacoxu](https://github.com/pacoxu))
- Metrics server nanny has now poll period set to 30s (previously 5 minutes) to allow faster scaling of metrics server. ([#101869](https://github.com/kubernetes/kubernetes/pull/101869), [@olagacek](https://github.com/olagacek)) [SIG Cloud Provider and Instrumentation]

					Description:    getS3RequestsCanceledMD(),
					Value:          float64(value),
					VariableLabels: map[string]string{"api": api},
				})
			}
			return metrics
		}

		// If we have too many, limit them
		bConnStats := globalBucketConnStats.getS3InOutBytes()
		buckets := mapKeysSorted(bConnStats)
		buckets = buckets[:min(v2MetricsMaxBuckets, len(buckets))]

		for _, bucket := range buckets {

* Improve efficiency of preemption logic in clusters with many pending pods. ([#72895](https://github.com/kubernetes/kubernetes/pull/72895), [@bsalamat](https://github.com/bsalamat))

* GCE: Fixes loadbalancer creation and deletion issues appearing in 1.10.5. ([#66400](https://github.com/kubernetes/kubernetes/pull/66400), [@nicksardo](https://github.com/nicksardo))
* kubeadm: Pull sidecar and dnsmasq-nanny images when using kube-dns ([#66499](https://github.com/kubernetes/kubernetes/pull/66499), [@rosti](https://github.com/rosti))

- kube-scheduler removed `AzureDiskLimits` ,`CinderLimits` `EBSLimits` and `GCEPDLimits` plugin. Given the corresponding CSI driver reports how many volumes a node can handle in NodeGetInfoResponse, the kubelet stores this limit in CSINode and the scheduler then knows the limit of the driver on the node. Removed plugins AzureDiskLimits, CinderLimits, EBSLimits and GCEPDLimits if you explicitly...

	// parent directories shouldn't trickle down.
	s.deleteFile(basePath, pathutil.Dir(pathutil.Clean(deletePath)), false, false)

	return nil
}

// DeleteBulk - delete many files in bulk to trash.
// this delete does not recursively delete empty
// parents, if you need empty parent delete support
// please use Delete() instead. This API is meant as
// an optimization for Multipart operations.

* Free up CPU and memory requested but unused by Metrics Server Pod Nanny. ([#57252](https://github.com/kubernetes/kubernetes/pull/57252), [@kawych](https://github.com/kawych))

  |   be done with a regex, but we need inter-field validation and rules which could be
  |   dealt with by something like drools.
  |
  | o i18n: would be good to be able to have names/descriptions/specifications
  |   in as many languages as possible. (see MNG-3626)
  |
  | o annotation mechanism so that changes to the model can be accurately tracked.
  |

- Reduce API server memory when many CRDs are loaded by sharing a single etcd3 client logger across all clients ([#111649](https://github.com/kubernetes/kubernetes/pull/111649), [@negz](https://github.com/negz)) [SIG API Machinery]

    ([docs](http://kubernetes.io/docs/user-guide/federation/federated-secrets.md))
    ([kubernetes/features#68](https://github.com/kubernetes/enhancements/issues/68))
  - [beta] Federation API server gained support for events and many
    federation controllers now report important events.
    ([docs](http://kubernetes.io/docs/user-guide/federation/events))
    ([kubernetes/features#70](https://github.com/kubernetes/enhancements/issues/70))