- Add flag --lease-reuse-duration-seconds for kube-apiserver to config etcd lease reuse duration. ([#97009](https://github.com/kubernetes/kubernetes/pull/97009), [@lingsamuel](https://github.com/lingsamuel)) [SIG API Machinery and Scalability]

* fix detach azure disk issue due to dirty cache ([#71495](https://github.com/kubernetes/kubernetes/pull/71495), [@andyzhangx](https://github.com/andyzhangx))
* Fixes issue where an apiserver on 1.9 and controller-manager on 1.10 can cause volume provisioning and binding to fail. ([#71286](https://github.com/kubernetes/kubernetes/pull/71286), [@msau42](https://github.com/msau42))

needed. A future release will make the `ErrWaitTimeout` error private and callers must use `Interrupted()` instead. If you are returning `ErrWaitTimeout` from your own methods, switch to creating a location specific `cause err` and pass it to the new method `wait.ErrorInterrupted(cause) error` which will ensure `Interrupted()` returns true for your loop. 
  
  The `wait.NewExponentialBackoffManager` and `wait.NewJitteringBackoffManager` functions have been marked as deprecated.  Callers...

* fixes spurious "meaningful conflict" error encountered by nodes attempting to update status, which could cause them to be considered unready ([#66171](https://github.com/kubernetes/kubernetes/pull/66171), [@liggitt](https://github.com/liggitt))

* fix incorrect prometheus azure metrics ([#77722](https://github.com/kubernetes/kubernetes/pull/77722), [@andyzhangx](https://github.com/andyzhangx))
* Fixed a bug in the apiserver storage that could cause just-added finalizers to be ignored on an immediately following delete request, leading to premature deletion. ([#77619](https://github.com/kubernetes/kubernetes/pull/77619), [@caesarxuchao](https://github.com/caesarxuchao))

* Support new NODE_OS_DISTRIBUTION 'custom' on GCE ([#61235](https://github.com/kubernetes/kubernetes/pull/61235), [@yguo0905](https://github.com/yguo0905))
* Fixed missing error checking that could cause kubelet to crash in a race condition. ([#60962](https://github.com/kubernetes/kubernetes/pull/60962), [@technicianted](https://github.com/technicianted))

- Pause image contains "Architecture" in non-amd64 images ([#87954](https://github.com/kubernetes/kubernetes/pull/87954), [@BenTheElder](https://github.com/BenTheElder)) [SIG Release]

- Fixed a data race in kubelet image manager that can cause static pod workers to silently stop working. ([#88915](https://github.com/kubernetes/kubernetes/pull/88915), [@roycaihw](https://github.com/roycaihw)) [SIG Node]

- Fix 1.28.0 regression where adding aggregated APIService objects could cause apiserver to panic and affect the health check ([#121040](https://github.com/kubernetes/kubernetes/pull/121040), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery and Testing]

* Resolves bottleneck in internal API server communication that can cause increased goroutines and degrade API Server performance ([#80465](https://github.com/kubernetes/kubernetes/pull/80465), [@answer1991](https://github.com/answer1991))