* Better messaging for missing volume binaries on host ([#36280](https://github.com/kubernetes/kubernetes/pull/36280), [@rkouj](https://github.com/rkouj))
* fix mesos unit tests ([#38196](https://github.com/kubernetes/kubernetes/pull/38196), [@deads2k](https://github.com/deads2k))

* Fix GCI mounter issue ([#38124](https://github.com/kubernetes/kubernetes/pull/38124), [@jingxu97](https://github.com/jingxu97))
* fix mesos unit tests ([#38196](https://github.com/kubernetes/kubernetes/pull/38196), [@deads2k](https://github.com/deads2k))

- Added e2e tests for volume group snapshots. ([#128972](https://github.com/kubernetes/kubernetes/pull/128972), [@manishym](https://github.com/manishym)) [SIG Cloud Provider, Storage and Testing]
- Added unit test helpers to validate CEL and patterns in CustomResourceDefinitions. ([#129028](https://github.com/kubernetes/kubernetes/pull/129028), [@sttts](https://github.com/sttts))

*   Upgrading the kubernetes-master units now results in staged upgrades just like the kubernetes-worker nodes. Use the upgrade action in order to continue the upgrade process on each unit such as juju run-action kubernetes-master/0 upgrade ([#55990](https://github.com/kubernetes/kubernetes/pull/55990),[ @hyperbolic2346](https://github.com/hyperbolic2346))

### Not Very Notable (that is, non-user-facing)

- Unit tests have been added for scopes and scope selectors in the quota spec ([#66351](https://github.com/kubernetes/kubernetes/pull/66351), [@vikaschoudhary16](https://github.com/vikaschoudhary16)) Courtesy of SIG Node, and SIG Scheduling

10134..10136  ; disallowed                             # NA   <reserved-10134>..<reserved-10136>
10137..1013F  ; valid                  ;      ; NV8    # 4.0  AEGEAN WEIGHT BASE UNIT..AEGEAN MEASURE THIRD SUBUNIT
10140..1018A  ; valid                  ;      ; NV8    # 4.1  GREEK ACROPHONIC ATTIC ONE QUARTER..GREEK ZERO SIGN

- `oc describe quota` used has the same unit format as hard ([#102177](https://github.com/kubernetes/kubernetes/pull/102177), [@atiratree](https://github.com/atiratree)) [SIG CLI]

### Other (Cleanup or Flake)

- To ensure the code be strong,  add unit test for GetAddressAndDialer ([#93180](https://github.com/kubernetes/kubernetes/pull/93180), [@FreeZhang61](https://github.com/FreeZhang61)) [SIG Node]

    4. Related unit tests.
  
  
  User Documentation: In PR https://github.com/kubernetes-sigs/cloud-provider-azure/pull/301 ([#88384](https://github.com/kubernetes/kubernetes/pull/88384), [@bowen5](https://github.com/bowen5)) [SIG Cloud Provider]

- If using cgroups v2, then the cgroup aware OOM killer will be enabled for container cgroups via  `memory.oom.group` .  This causes processes within the cgroup to be treated as a unit and killed simultaneously in the event of an OOM kill on any process in the cgroup. ([#117793](https://github.com/kubernetes/kubernetes/pull/117793), [@tzneal](https://github.com/tzneal)) [SIG Apps, Node and Testing]