- The disk-cached discovery client is moved from k8s.io/client-go/discovery to k8s.io/client-go/discovery/cached/disk.
The memory-cached discovery client is moved from k8s.io/client-go/discovery/cached to k8s.io/client-go/discovery/cached/memory.
([#72214](https://github.com/kubernetes/kubernetes/pull/72214), [@caesarxuchao](https://github.com/caesarxuchao))

- Fix the bug PIP's DNS is deleted if no DNS label service annotation isn't set. ([#87310](https://github.com/kubernetes/kubernetes/pull/87310), [@nilo19](https://github.com/nilo19)) [SIG Cloud Provider]
- Fix: set nil cache entry based on old cache ([#87593](https://github.com/kubernetes/kubernetes/pull/87593), [@aramase](https://github.com/aramase)) [SIG Cloud Provider]

### SIG Scheduling

- The equivalence class cache has been redesigned to be a two level cache, resulting in a significant increase in scheduling throughput and performance. ([#65714](https://github.com/kubernetes/kubernetes/pull/65714), [@resouer](https://github.com/resouer))

* kubeadm has removed `.Etcd.SelfHosting`...

- Fixed a bug in the garbage collector controller which could block indefinitely due to a cache sync failure. This fix allows the garbage collector to eventually continue garbage collecting other resources if a given resource cannot be listed or watched. Any objects in the unsynced resource type with owner references with `blockOwnerDeletion: true` will not be known to the garbage collector. Use of `blockOwnerDeletion`...

* kubelet now accepts a --cni-cache-dir option, which defaults to /var/lib/cni/cache, where CNI stores cache files. ([#78908](https://github.com/kubernetes/kubernetes/pull/78908), [@dcbw](https://github.com/dcbw))

- Fix availability set cache in vmss cache ([#100110](https://github.com/kubernetes/kubernetes/pull/100110), [@CecileRobertMichon](https://github.com/CecileRobertMichon)) [SIG Cloud Provider]

  - Regenerate list of EC2 instances
  - Fix pricing endpoint in AWS China Region
  
  ### Azure
  - Add optional jitter on initial VMSS VM cache refresh, keep the refreshes spread over time
  - Serve from cache for the whole period of ongoing throttling
  - Fix unwanted VMSS VMs cache invalidation
  - Enforce setting the number of retries if cloud provider backoff is enabled
  - Don't update capacity if VMSS provisioning state is updating

- New `KUBECACHEDIR` environment variable was introduced to override default discovery cache directory which is `$HOME/.kube/cache`. ([#109479](https://github.com/kubernetes/kubernetes/pull/109479), [@ardaguclu](https://github.com/ardaguclu))

- To reduce chances of throttling, VM cache is set to nil when Azure node provisioning state is deleting ([#87635](https://github.com/kubernetes/kubernetes/pull/87635), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]