- AzureDiskLimits
  - CinderLimits
  - EBSLimits
  - GCEPDLimits
  
  The NodeVolumeLimits plugin can handle the same functionality as the above plugins since the above volume types are migrated to CSI.
  Please remove those plugins and replace them with the NodeVolumeLimits plugin if you explicitly use those plugins in the scheduler config.

- Added a new `FileKeyRef` field to containers, allowing them to load variables from files by setting this field.
  
  Introduced the `EnvFiles` feature gate to govern activation of this functionality. ([#132626](https://github.com/kubernetes/kubernetes/pull/132626), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG API Machinery, Apps, Node and Testing]

Storage worked on bringing CSI to feature parity with in-tree functionality, including functionality like resizing, inline volumes, and more. SIG Storage introduces new alpha functionality in CSI that doesn't exist in the Kubernetes Storage subsystem yet, like volume cloning.

Volume cloning enables users to specify another PVC as a "DataSource" when provisioning a new volume. If the underlying storage system supports this functionality and implements the "CLONE_VOLUME" capability in its CSI...

* Removed alpha functionality that allowed the controller manager to approve kubelet server certificates. This functionality should be replaced by automating validation and approval of node server certificate signing requests. ([#62471](https://github.com/kubernetes/kubernetes/pull/62471), [@mikedanese](https://github.com/mikedanese))...

* A cluster-autoscaler ClusterRole is added to cover only the functionality required by Cluster Autoscaler and avoid abusing system:cluster-admin role. ([#64503](https://github.com/kubernetes/kubernetes/pull/64503), [@kgolab](https://github.com/kgolab))

  - CSIPersistentVolume
  - GCERegionalPersistentDisk
  - KubeletPluginsWatcher
  - VolumeScheduling
- kubeadm
  - The DynamicKubeletConfig feature gate is deprecated. The functionality is still accessible by using the kubeadm alpha kubelet enable-dynamic command.

- Upgrades functionality of `kubectl kustomize` as described at
  https://github.com/kubernetes-sigs/kustomize/releases/tag/kustomize%2Fv4.2.0 ([#103419](https://github.com/kubernetes/kubernetes/pull/103419), [@natasha41575](https://github.com/natasha41575)) [SIG CLI]

- Added container filesystem to the `ImageFsInfoResponse`. ([#120914](https://github.com/kubernetes/kubernetes/pull/120914), [@kannon92](https://github.com/kannon92))
- Added multiplication functionality to `Quantity`. ([#117411](https://github.com/kubernetes/kubernetes/pull/117411), [@tenzen-y](https://github.com/tenzen-y))
- Added new feature gate called `RuntimeClassInImageCriApi` to address `kubelet` changes needed for KEP 4216.

## Major Themes

### SIG API Machinery

SIG API work this cycle involved development of the "dry run" functionality, which enables users to see the results of a particular command without persisting those changes.

### SIG-autoscaling

SIG Autoscaling focused on improving the Horizontal Pod Autoscaling API and algorithm:

- Introduces new alpha functionality to the reflector, allowing user to enable API streaming.
  
  To activate this feature, users can set the `ENABLE_CLIENT_GO_WATCH_LIST_ALPHA` environmental variable.