* **[Pod priority and preemption](https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/) is now enabled by default.** Note that this means that pods from *any* namespace can now request priority classes that compete with and/or cause preemption of critical system pods that are already running. If that is not desired, disable the PodPriority feature by setting `--feature-...

- Fixed a suboptimal scheduler preemption behavior where potential preemption victims were violating Pod Disruption Budgets. ([#128434](https://github.com/kubernetes/kubernetes/pull/128434), [@NoicFank](https://github.com/NoicFank)) [SIG Scheduling]

## Dependencies

### Added

* Allow for watching objects larger than 1MB given etcd accepts objects of size up to 1.5MB ([#72053](https://github.com/kubernetes/kubernetes/pull/72053), [@wojtek-t](https://github.com/wojtek-t))
* Improve efficiency of preemption logic in clusters with many pending pods. ([#72895](https://github.com/kubernetes/kubernetes/pull/72895), [@bsalamat](https://github.com/bsalamat))



# v1.12.5

[Documentation](https://docs.k8s.io)

Pod Priority and Preemption in Kubernetes ([#564](https://github.com/kubernetes/enhancements/issues/564))

creation of PriorityClasses ([user doc](https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/))([design doc](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/scheduling/pod-priority-api.md))

* [alpha] This version now supports priority-based preemption of pods ([user doc](https://kubernetes.io/docs/concepts/configuration/pod-priority-preemption/))([design doc](https://github.com/kubernetes/community/blob/master/contributors/design-propos...

- Fixed a bug in kube-scheduler where pending pod preemption caused preemptor pods to be retried more frequently. ([#134247](https://github.com/kubernetes/kubernetes/pull/134247), [@macsko](https://github.com/macsko)) [SIG Scheduling and Testing]

*   Pod preemption has been improved.
    *   Now takes PodDisruptionBudget into account. ([#56178](https://github.com/kubernetes/kubernetes/pull/56178),[ @bsalamat](https://github.com/bsalamat))

- Migrated `pkg/scheduler/framework/preemption/preemption.go`, `pkg/scheduler/framework/plugins/examples/stateful/stateful.go`, and `pkg/scheduler/framework/plugins/noderesources/resource_allocation.go` to structured logging ([#105967](https://github.com/kubernetes/kubernetes/pull/105967), [@shiv...

* kubeadm: explicitly wait for `etcd` to have grown when joining a new control plane ([#72984](https://github.com/kubernetes/kubernetes/pull/72984), [@ereslibre](https://github.com/ereslibre))
* Improve efficiency of preemption logic in clusters with many pending pods. ([#72895](https://github.com/kubernetes/kubernetes/pull/72895), [@bsalamat](https://github.com/bsalamat))

- Fixed a suboptimal scheduler preemption behavior where potential preemption victims were violating Pod Disruption Budgets. ([#128431](https://github.com/kubernetes/kubernetes/pull/128431), [@NoicFank](https://github.com/NoicFank)) [SIG Scheduling]