#### **Kubeadm**

  * Rescheduler relies on taints, which were changed in a backward incompatible way. Rescheduler 0.3 shipped together with Kubernetes 1.6 understands the new taints and will clean up the old annotations, but Rescheduler 0.2 shipped together with Kubernetes 1.5 doesn't understand the new taints. In order to avoid eviction loop during 1.5->1.6 upgrade you need to either upgrade the master node atomically (for example...

## Known Issues

### Etcd v3.5.[0-2] data corruption

Data corruption issue was found in etcd v3.5.0 release that was shipped with 1.22 Kubernetes release. Please read up-to-date [production recommendations for etcd](https://github.com/etcd-io/etcd/tree/main/CHANGELOG).

## Changes by Kind

### Deprecation

- Pod Finalizers and Conditions updates are skipped for re-scheduling attempts ([#91298](https://github.com/kubernetes/kubernetes/pull/91298), [@alculquicondor](https://github.com/alculquicondor)) [SIG Scheduling]

to not return an error when the specified target can be detected as not a mount point. On Linux, the behavior of detecting a mount point depends on `umount` command is validated when the mounter is created. Additionally, mount point checks will be skipped in CleanupMountPoint/CleanupMountWithForce if the mounter's Unmount having the changed behavior of not returning error when target is not a mount point. ([#109676](https://github.com/kubernetes/kubernetes/pull/109676), [@cartermckinnon](https://g...

- Skipped pod backoff entirely when the `PodMaxBackoffDuration` kube-scheduler option was set to zero and the `SchedulerPopFromBackoffQ` feature gate was enabled. ([#131965](https://github.com/kubernetes/kubernetes/pull/131965), [@macsko](https://github.com/macsko))...

* kubeadm: preflight checks on external etcd certificates are now skipped when joining a control-plane node with automatic copy of cluster certificates (--certificate-key) ([#75847](https://github.com/kubernetes/kubernetes/pull/75847), [@fabriziopandini](https://github.com/fabriziopandini))

useUTC","getUTCMonth","getUTCDate","getFullYear","getMonth","getDate","weekYear","temp","weekdayOverflow","curWeek","GG","W","E","createLocal","_week","gg","_dayOfYear","dayOfYearFromWeekInfo","_nextDay","ms","setFullYear","ISO_8601","RFC_2822","skipped","stringLength","totalParsedInputLength","hour","isPm","meridiemHour","meridiemFixWrap","erasConvertYear","prepareConfig","preparse","tempConfig","bestMoment","scoreToBeat","currentScore","validFormatFound","bestFormatIsValid","score","configFrom...

- Fixed a 1.26 regression scheduling bug by ensuring that preemption is skipped when a PreFilter plugin returns `UnschedulableAndUnresolvable` ([#119952](https://github.com/kubernetes/kubernetes/pull/119952), [@sanposhiho](https://github.com/sanposhiho)) [SIG Scheduling]

### Etcd v3.5.[0-2] data corruption

Data corruption issue was found in etcd v3.5.0 release that was shipped with 1.22 Kubernetes release. Please read up-to-date [production recommendations for etcd](https://github.com/etcd-io/etcd/tree/main/CHANGELOG).

## Urgent Upgrade Notes