- Added a new IPAddress object kind
  - Added a new ClusterIP allocator. The new allocator removes previous Service CIDR block size limitations for IPv4, and limits IPv6 size to a /64 ([#115075](https://github.com/kubernetes/kubernetes/pull/115075), [@aojea](https://github.com/aojea)) [SIG API Machinery, Apps, Auth, CLI, Cluster Lifecycle, Network and Testing]

where kubelet crashes trying to free memory under memory pressure. ([#58574](https://github.com/kubernetes/kubernetes/pull/58574), [@yastij](https://github.com/yastij))

* New alpha feature limits the number of processes running in a pod. Cluster administrators will be able to place limits by using the new kubelet command line parameter --pod-max-pids. Note that since this is a alpha feature they will need to enable the "SupportPodPidsLimit" feature. By default, we do not set any maximum...

*   Azure NSG rules can be consolidated to reduce the likelihood of hitting Azure resource limits (available only in regions where the Augmented Security Groups preview is available).  ([#55740](https://github.com/kubernetes/kubernetes/pull/55740), [@itowlson](https://github.com/itowlson))

- Remove deprecated `--generator, --replicas, --service-generator, --service-overrides, --schedule` from `kubectl run`
  Deprecate `--serviceaccount, --hostport, --requests, --limits` in `kubectl run` ([#99732](https://github.com/kubernetes/kubernetes/pull/99732), [@soltysh](https://github.com/soltysh))

* Scale max-inflight limits together with master VM sizes. ([#73268](https://github.com/kubernetes/kubernetes/pull/73268), [@wojtek-t](https://github.com/wojtek-t))

- Added `ServedVersions` field to `StorageVersion` API. ([#118386](https://github.com/kubernetes/kubernetes/pull/118386),...

volume availability, the API now enables volume resizing and snapshotting. These features are in alpha.
The SIG also focused on providing more control over storage: the ability to set requests and
limits on ephemeral storage, the ability to specify mount options, more metrics, and improvements to Flex driver deployments.

[SIG Storage]: https://github.com/kubernetes/community/tree/master/sig-storage

## Before Upgrading

- CPU limits are now respected for Windows containers. If a node is over-provisioned, no weighting is used, only limits are respected. ([#86101](https://github.com/kubernetes/kubernetes/pull/86101), [@PatrickLang](https://github.com/PatrickLang)) [SIG Node, Testing and Windows]

- client-go discovery clients constructed using `NewDiscoveryClientForConfig` or `NewDiscoveryClientForConfigOrDie` default to rate limits that cause normal discovery request patterns to take several seconds. This is fixed in https://issue.k8s.io/86168 and will be resolved in v1.17.1. As a workaround, the `Burst` value can be adjusted higher in the rest.Config passed into `NewDiscoveryClientForConfig`...

* Fix Azure client requests stuck issues on http.StatusTooManyRequests (HTTP Code 429). ([#81279](https://github.com/kubernetes/kubernetes/pull/81279), [@feiskyer](https://github.com/feiskyer))
* Reduces GCE PD Node Attach Limits by 1 since the node boot disk is considered an attachable disk ([#80923](https://github.com/kubernetes/kubernetes/pull/80923), [@davidz627](https://github.com/davidz627))