- `kubeadm upgrade` now renews all the certificates used by a component before upgrading the component itself, with the exception of certificates signed by external CAs. User can eventually opt-out of certificate renewal during upgrades by setting the new flag `--certificate-renewal` to false. ([#76862](https://github.com/kubernetes/kubernetes/pull/76862), [@fabriziopandini](https://github.com/fabriziopandini))