- kubeadm

  - The CoreDNS Deployment now checks readiness via the `ready` plugin.
  - The `proxy` plugin has been deprecated. The `forward` plugin is to be used instead.
  - `kubernetes` plugin removes the `resyncperiod` option.
  - The `upstream` option is deprecated and ignored if included.
    ([#82127](https://github.com/kubernetes/kubernetes/pull/82127), [@rajansandeep](https://github.com/rajansandeep))

- kubectl