* - Fix a bug in DNS resolution for externalName services
    * and PTR records that need to query from upstream nameserver.
* 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))

- The `export` query parameter (inconsistently supported by API resources and deprecated in v1.14) is fully removed.  Requests setting this query parameter will now receive a 400 status response. ([#98312](https://github.com/kubernetes/kubernetes/pull/98312), [@deads2k](https://github.com/deads2k)) [SIG API Machinery, Auth and Testing]...

    * - Fix a bug in DNS resolution for externalName services
    * and PTR records that need to query from upstream nameserver.
* Fix machineID getting for vmss nodes when using instance metadata ([#62611](https://github.com/kubernetes/kubernetes/pull/62611), [@feiskyer](https://github.com/feiskyer))

- Extended the kubelet's PodResources API to include resources allocated in `ResourceClaims` via `DynamicResourceAllocation`. Additionally, added a new `Get()` method to query a specific pod for its resources. ([#115847](https://github.com/kubernetes/kubernetes/pull/115847), [@moshe010](https://github.com/moshe010)) [SIG Node]

* Fixes server name verification of aggregated API servers and webhook admission endpoints ([#56415](https://github.com/kubernetes/kubernetes/pull/56415), [@liggitt](https://github.com/liggitt))
* Update jquery and bootstrap dependencies ([#56445](https://github.com/kubernetes/kubernetes/pull/56445), [@dashpole](https://github.com/dashpole))

* Created a new `dryRun` query parameter for mutating endpoints. If the parameter is set, then the query will be rejected, as the feature is not implemented yet. This will allow forward compatibility with future clients; otherwise, future clients talking with older apiservers might end up modifying a resource even if they include the `dryRun` query parameter. ([#63557](https://github.com/kubernetes/kubernetes/pull/63557), [@apelisse](...

- The kube-apiserver's healthz now takes in an optional query parameter which allows you to disable health checks from causing healthz failures.  ([#70676](https://github.com/kubernetes/kubernetes/pull/70676), [@logicalhan](https://github.com/logicalhan))

* Fix a potential bug that scheduler preempts unnecessary pods. ([#70898](https://github.com/kubernetes/kubernetes/pull/70898), [@Huang-Wei](https://github.com/Huang-Wei))
* The kube-apiserver's healthz now takes in an optional query parameter which allows you to disable health checks from causing healthz failures.  ([#70676](https://github.com/kubernetes/kubernetes/pull/70676), [@logicalhan](https://github.com/logicalhan))

* Remove examples moved to docs site ([#23513](https://github.com/kubernetes/kubernetes/pull/23513), [@erictune](https://github.com/erictune))
* Do not query the metadata server to find out if running on GCE.  Retry metadata server query for gcr if running on gce. ([#28871](https://github.com/kubernetes/kubernetes/pull/28871), [@vishh](https://github.com/vishh))

* We change the default attach_detach_controller sync period to 1 minute to reduce the query frequency through cloud provider to check whether volumes are attached or not. ([#41363](https://github.com/kubernetes/kubernetes/pull/41363), [@jingxu97](https://github.com/jingxu97))

## Changes to Major Components