* Fix scheduling starvation of pods in cluster with large number of unschedulable pods. ([#72619](https://github.com/kubernetes/kubernetes/pull/72619), [@everpeace](https://github.com/everpeace))
* change azure disk host cache to ReadOnly by default ([#72229](https://github.com/kubernetes/kubernetes/pull/72229), [@andyzhangx](https://github.com/andyzhangx))

  - *apiserver_cache_list_total*: Counter of LIST requests served from watch cache, broken down by resource_prefix and index_name
  - *apiserver_cache_list_fetched_objects_total*: Counter of objects read from watch cache in the course of serving a LIST request, broken down by resource_prefix and index_name

* 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))

- Removed deprecated kubectl.kubernetes.io/default-logs-container support ([#109254](https://github.com/kubernetes/kubernetes/pull/109254), [@pacoxu](https://github.com/pacoxu))
- Renamed `apiserver_watch_cache_watch_cache_initializations_total` to `apiserver_watch_cache_initializations_total` ([#109579](https://github.com/kubernetes/kubernetes/pull/109579), [@logicalhan](https://github.com/logicalhan))

### Other (Cleanup or Flake)

- --cache-dir sets cache directory for both http and discovery, defaults to $HOME/.kube/cache ([#92910](https://github.com/kubernetes/kubernetes/pull/92910), [@soltysh](https://github.com/soltysh)) [SIG API Machinery and CLI]

  - 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

* Fixed detection of master during creation of multizone nodes cluster by kube-up. ([#38617](https://github.com/kubernetes/kubernetes/pull/38617), [@jszczepkowski](https://github.com/jszczepkowski))
* Kubelet: Add image cache. ([#38375](https://github.com/kubernetes/kubernetes/pull/38375), [@Random-Liu](https://github.com/Random-Liu))



# v1.5.1

- Updated cAdvisor to v0.44.2 - Fix metrics in cri-o when a container restarts ([#118800](https://github.com/kubernetes/kubernetes/pull/118800), [@harche](https://github.com/harche)) [SIG Node]

## Dependencies

### Added
_Nothing has changed._

### Changed
- github.com/google/cadvisor: [v0.44.1 → v0.44.2](https://github.com/google/cadvisor/compare/v0.44.1...v0.44.2)

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

   ([#122571](https://github.com/kubernetes/kubernetes/pull/122571), [@p0lyn0mial](https://github.com/p0lyn0mial))
- Added the `apiserver_watch_cache_read_wait` metric to measure the watch cache impact on request latency.
   ([#123190](https://github.com/kubernetes/kubernetes/pull/123190), [@padlar](https://github.com/padlar))