- 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]

* 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))

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...

  - 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.

  - 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.

- 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]

* 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))...

- 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.

- The core functionality of Dynamic Resource Allocation (DRA) got promoted to beta. No action is required when *upgrading*, the previous v1alpha3 API is still supported, so existing deployments and DRA drivers based on v1alpha3 continue to work. *Downgrading* from 1.32...

- 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.