* fix the issue that default azure disk fsypte(ext4) does not work on Windows ([#62250](https://github.com/kubernetes/kubernetes/pull/62250), [@andyzhangx](https://github.com/andyzhangx))
* Fixed bug in rbd-nbd utility when nbd is used. ([#62168](https://github.com/kubernetes/kubernetes/pull/62168), [@piontec](https://github.com/piontec))

* As of Kubernetes 1.15, the SupportNodePidsLimit feature introduced as alpha in Kubernetes 1.14 is now beta, and the ability to utilize it is enabled by default.  It is no longer necessary to set the feature gate `SupportNodePidsLimit=true`.  In all other respects, this functionality behaves as it did in Kubernetes 1.14. ([#76221](https://github.com/kubernetes/kubernetes/pull/76221),...

* The ability to use kubectl scale jobs is deprecated. All other scale operations remain in place, but the ability to scale jobs will be removed in a future release.  ([#60139](https://github.com/kubernetes/kubernetes/pull/60139), [@soltysh](https://github.com/soltysh))

- More fields are allowed at the root of the CRD validation schema when the status subresource is enabled. ([#65357](https://github.com/kubernetes/kubernetes/pull/65357), [@nikhita](https://github.com/nikhita))
- api-machinery utility functions `SetTransportDefaults` and `DialerFor` once again respect custom Dial functions set on transports ([#65547](https://github.com/kubernetes/kubernetes/pull/65547), [@liggitt](https://github.com/liggitt))

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

* Fix GCE etcd scripts to pass in all required parameters for the etcd migration utility to correctly perform HA upgrades and downgrades ([#61956](https://github.com/kubernetes/kubernetes/pull/61956), [@jpbetz](https://github.com/jpbetz))

### SIG CLI introduces kubectl debug

- Fixed incorrect log information in the `iptables` utility. ([#110723](https://github.com/kubernetes/kubernetes/pull/110723), [@yangjunmyfm192085](https://github.com/yangjunmyfm192085))

* Fixes an issue where the resourceVersion of an object in a DELETE watch event was not the resourceVersion of the delete itself, but of the last update to the object. This could disrupt the ability of clients clients to re-establish watches properly. ([#58547](https://github.com/kubernetes/kubernetes/pull/58547), [@liggitt](https://github.com/liggitt))

* **[beta]** Node Problem Detector is beta (v0.3.0) now. New
  features added into node-problem-detector:v0.3.0:
  - Add support for journald.
  - The ability to monitor any system daemon logs. Previously only kernel
    logs were supported.
  - The ability to be deployed and run as a native daemon.
* **[alpha]** Critical Pods: When feature gate "ExperimentalCriticalPodAnnotation" is