- You can now use kubeadm's `InitConfiguration` and `JoinConfiguration` to define which preflight errors will be ignored. ([#75499](https://github.com/kubernetes/kubernetes/pull/75499), [@marccarre](https://github.com/marccarre))

- Kubeadm: allow RSA and ECDSA format keys in preflight check ([#112537](https://github.com/kubernetes/kubernetes/pull/112537), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

## Dependencies

### Added
_Nothing has changed._

### Changed

- Deprecate --generator flag from kubectl create commands ([#88655](https://github.com/kubernetes/kubernetes/pull/88655), [@soltysh](https://github.com/soltysh)) [SIG CLI]
- During initialization phase (preflight), kubeadm now verifies the presence of the conntrack executable ([#85857](https://github.com/kubernetes/kubernetes/pull/85857), [@hnanni](https://github.com/hnanni)) [SIG Cluster Lifecycle]

- `kubeadm`: turned on feature gate `MergeCLIArgumentsWithConfig` to merge the config from flag and config file, otherwise, if the flag `--ignore-preflight-errors` is set from the CLI, then the value from config file will be ignored. ([#119946](https://github.com/kubernetes/kubernetes/pull/119946), [@chendave](https://github.com/chendave))

- kubeadm no longer performs IPVS checks as part of its preflight checks ([#81791](https://github.com/kubernetes/kubernetes/pull/81791), [@yastij](https://github.com/yastij))

- Kubeadm: Add a preflight check that the control-plane node has at least 1700MB of RAM ([#93275](https://github.com/kubernetes/kubernetes/pull/93275), [@xlgao-zju](https://github.com/xlgao-zju)) [SIG Cluster Lifecycle]

- Added support for RSA and ECDSA format keys in preflight check on `kubeadm`. ([#112508](https://github.com/kubernetes/kubernetes/pull/112508), [@SataQiu](https://github.com/SataQiu))

^[+-]?(\d+|\d*\.\d+)(e[+-]?\d+)?(%|\w+)?$/.test(i))return i.replace(/^[+-]?/,t=>t==="-"?"":"-");let e=["var","calc","min","max","clamp"];for(let t of e)if(i.includes(`${t}(`))return`calc(${i} * -1)`}var fi=C(()=>{l()});var du,hu=C(()=>{l();du=["preflight","container","accessibility","pointerEvents","visibility","position","inset","isolation","zIndex","order","gridColumn","gridColumnStart","gridColumnEnd","gridRow","gridRowStart","gridRowEnd","float","clear","margin","boxSizing","lineClamp","disp...

### Other notable changes

* fix pdb validation bug on PodDisruptionBudgetSpec ([#48706](https://github.com/kubernetes/kubernetes/pull/48706), [@dixudx](https://github.com/dixudx))
* kubeadm: Fix join preflight check false negative ([#49825](https://github.com/kubernetes/kubernetes/pull/49825), [@erhudy](https://github.com/erhudy))

### Other notable changes

* Revert deprecation of vCenter port in vSphere Cloud Provider. ([#49689](https://github.com/kubernetes/kubernetes/pull/49689), [@divyenpatel](https://github.com/divyenpatel))
* kubeadm: Add preflight check for localhost resolution. ([#48875](https://github.com/kubernetes/kubernetes/pull/48875), [@craigtracey](https://github.com/craigtracey))