- Revised `OpenAPI v2` fetching for CustomResourceDefinitions. CRDs are now aggregated lazily,
  which improves resource usage during installation of many CRDs. As a result, the first request
  to fetch the OpenAPI may be slower. ([#118808](https://github.com/kubernetes/kubernetes/pull/118808), [@Jefftree](https://github.com/Jefftree))

- Kubeadm: increase robustness for "kubeadm join" when adding etcd members on slower setups ([#90645](https://github.com/kubernetes/kubernetes/pull/90645), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

 - Kubeadm: increase robustness for "kubeadm join" when adding etcd members on slower setups ([#90645](https://github.com/kubernetes/kubernetes/pull/90645), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

- Enhanced the daemonset sync logic to avoid a problem where pods are thought to be unavailable when the controller's clock is slower than the node's clock. ([#77208](https://github.com/kubernetes/kubernetes/pull/77208), [@DaiHao](https://github.com/DaiHao))

    * Default value for expendable pod priority cutoff in GCP deployment of Cluster Autoscaler changed from 0 to -10.
    * action required: users deploying workloads with priority lower than 0 may want to use priority lower than -10 to avoid triggering scale-up.
* [action required] kubeadm: The `v1alpha1` config API has been removed. ([#65628](https://github.com/kubernetes/kubernetes/pull/65628), [@luxas](https://github.com/luxas))

### Other (Cleanup or Flake)

- Allow using lower and upper case feature flag value, the name has to match still ([#121441](https://github.com/kubernetes/kubernetes/pull/121441), [@soltysh](https://github.com/soltysh)) [SIG CLI]

// https://www.iana.org/domains/root/db/flir.html
flir

// florist : Binky Moon, LLC
// https://www.iana.org/domains/root/db/florist.html
florist

// flowers : XYZ.COM LLC
// https://www.iana.org/domains/root/db/flowers.html
flowers

// fly : Charleston Road Registry Inc.
// https://www.iana.org/domains/root/db/fly.html
fly

// foo : Charleston Road Registry Inc.

- Fixed an issue in the kubelet that showed when writeable layers and read-only layers were at different paths within the same mount.
  Kubernetes was previously detecting that the image filesystem was split, even when that was not really the case ([#128344](https://github.com/kubernetes/kubernetes/pull/128344), [@kannon92](https://github.com/kannon92)) [SIG Node]

- The `controller.kubernetes.io/pod-deletion-cost` annotation can be set to offer a hint on the cost of deleting a `Pod` compared to other pods belonging to the same ReplicaSet. Pods with lower deletion cost are deleted first. This is an alpha feature. ([#99163](https://github.com/kubernetes/kubernetes/pull/99163), [@ahg-g](https://github.com/ahg-g))

and now perform a more rigorous reconciliation to ensure static pods (especially those that use fixed UIDs) are restarted.  As a side effect of these changes static pods will be restarted with lower latency than before (2s vs 4s, on average) and rapid updates to pod configuration should take effect sooner.
  
  A new metric `kubelet_known_pods` has been added at ALPHA stability to report the number of pods a Kubelet is tracking in a number of internal states.  Operators may use the metrics...