* Reduce Metrics Server memory requirement from 140Mi + 4Mi per node to 40Mi + 4Mi per node. ([#58391](https://github.com/kubernetes/kubernetes/pull/58391), [@kawych](https://github.com/kawych))

- The `apiserver` exposes 4 new metrics that allow to track the status of the Service CIDRs allocations:
      - current number of available IPs per Service CIDR
      - current number of used IPs per Service CIDR
      - total number of allocation per Service CIDR
      - total number of allocation errors per ServiceCIDR ([#104119](https://github.com/kubernetes/kubernetes/pull/104119), [@aojea](https://github.com/aojea))

- github.com/valyala/tcplisten: ceec8f9
- github.com/vektah/gqlparser: v1.1.2
- go.etcd.io/etcd: 3cf2f69
- go.mongodb.org/mongo-driver: v1.1.2
- go4.org: 417644f
- golang.org/x/build: 2835ba2
- golang.org/x/perf: 6e6d33e
- golang.org/x/xerrors: a985d34
- gopkg.in/alecthomas/kingpin.v2: v2.2.6
- gopkg.in/cheggaaa/pb.v1: v1.0.25
- gopkg.in/resty.v1: v1.12.0
- grpc.go4.org: 11d0a25
- k8s.io/system-validators: v1.0.4

	type parameter, and all the types in its type set unify with
	the other type
	per the unification rules for <code>≡<sub>A</sub></code>
	(loose unification at the top level and exact unification
	for element types).
</li>
</ul>

<p>
If both types are bound type parameters, they unify per the given
matching modes if:
</p>

<ul>
<li>
	Both type parameters are identical.

- 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 and Windows]

* Rename --experiemental-cgroups-per-qos to --cgroups-per-qos ([#39972](https://github.com/kubernetes/kubernetes/pull/39972), [@derekwaynecarr](https://github.com/derekwaynecarr))

The [dynamic maximum volume count](https://github.com/kubernetes/enhancements/issues/554) feature was also moved to beta. This enables a volume plugin to specify the maximum number of a given volume type per node as a function of the node characteristics (for example, a larger limit for larger nodes, a smaller limit for smaller nodes).

## Changelog since v1.14.9

### Other notable changes

* azure: update disk lock logic per vm during attach/detach to allow concurrent updates for different nodes. ([#85115](https://github.com/kubernetes/kubernetes/pull/85115), [@aramase](https://github.com/aramase))

  - "routeTableCacheTTLInSeconds"
  ([#86266](https://github.com/kubernetes/kubernetes/pull/86266), [@zqingqing1](https://github.com/zqingqing1)) [SIG Cloud Provider]

New alpha features include:
* Online volume resizing will increase the filesystem size of a resized volume without requiring a Pod restart.
* AWS EBS and GCE PD volumes support increased limits on the maximum number of attached volumes per node.
* Subpath volume directories can be created using DownwardAPI environment variables.

### SIG Windows

This release supports more of Kubernetes API for pods and containers on Windows, including: