- Kubeadm: during the preflight check "CreateJob" of "kubeadm upgrade", check if there are no nodes where a Pod can schedule. If there are none, show a warning and skip this preflight check. This can happen in single node clusters where the only node was drained. ([#124570](https://github.com/kubernetes/kubernetes/pull/124570), [@neolit123](https://gi...

- `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))

^[+-]?(\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...

- Kubeadm: allow RSA and ECDSA format keys in preflight check ([#112534](https://github.com/kubernetes/kubernetes/pull/112534), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

## Dependencies

### Added
_Nothing has changed._

### Changed

with a content type of `text/plain` containing JSON data would be accepted and the JSON data would be extracted.

But requests with content type `text/plain` are exempt from [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) preflights, for being considered [Simple requests](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests). So, the browser would execute them right away including cookies, and the text content could be a JSON string that would be parsed and...