- Kubelet config file will be backed up to `/etc/kubernetes/tmp/` folder with `kubeadm-kubelet-config` append with a random suffix as the filename ([#114695](https://github.com/kubernetes/kubernetes/pull/114695), [@chendave](https://github.com/chendave)) [SIG Cluster Lifecycle]

- EmptyDir memory backed volumes are sized as the minimum of pod allocatable memory on a host and an optional explicit user provided value. ([#100319](https://github.com/kubernetes/kubernetes/pull/100319), [@derekwaynecarr](https://github.com/derekwaynecarr)) [SIG Node]

    * faster handoff when a leader-elected process is gracefully terminated.
* Make volume binder resilient to races between main schedule loop and async binding operation  ([#72045](https://github.com/kubernetes/kubernetes/pull/72045), [@cofyc](https://github.com/cofyc))

- The `EmptyDir` memory backed volumes are sized as the minimum of pod allocatable memory on a host and an optional explicit user provided value. ([#101048](https://github.com/kubernetes/kubernetes/pull/101048), [@dims](https://github.com/dims))

CSI Volume Snapshot moves to GA in the 1.20 release. This feature provides a standard way to trigger volume snapshot operations in Kubernetes and allows Kubernetes users to incorporate snapshot operations in a portable manner on any Kubernetes environment regardless of supporting underlying storage providers.

 - Fix: support removal of nodes backed by deleted non VMSS instances on Azure ([#91184](https://github.com/kubernetes/kubernetes/pull/91184), [@bpineau](https://github.com/bpineau)) [SIG Cloud Provider]

- Added DynamicAuditing feature which allows for the configuration of audit webhooks through the use of an AuditSink API object. ([#67257](https://github.com/kubernetes/kubernetes/pull/67257), [@pbarker](https://github.com/pbarker))

 - Fix: azure disk dangling attach issue which would cause API throttling ([#90749](https://github.com/kubernetes/kubernetes/pull/90749), [@andyzhangx](https://github.com/andyzhangx)) [SIG Cloud Provider]
 - Fix: support removal of nodes backed by deleted non VMSS instances on Azure ([#91184](https://github.com/kubernetes/kubernetes/pull/91184), [@bpineau](https://github.com/bpineau)) [SIG Cloud Provider]

* PVC may not be synced to controller local cache in time if PV is bound by external PV binder (e.g. kube-scheduler), double check if PVC is not found to prevent reclaiming PV wrongly. ([#67062](https://github.com/kubernetes/kubernetes/pull/67062), [@cofyc](https://github.com/cofyc))

* Resolves an issue serving aggregated APIs backed by services that respond to requests to `/` with non-2xx HTTP responses ([#79895](https://github.com/kubernetes/kubernetes/pull/79895), [@deads2k](https://github.com/deads2k))