- 'kubeadm: marked the flag "--experimental-output'' as deprecated (it will
  be removed in a future release) and added a new flag ''--output" that serves the
  same purpose. Affected commands are - "kubeadm config images list", "kubeadm token

  
  kubeadm: Started using `k8s.io/system-validators` `v1.12.1` in `kubeadm` `v1.35`. During `kubeadm init`, `kubeadm join`, and `kubeadm upgrade`, the SystemVerification preflight check throws an error if cgroups v1 is detected and the detected `kubelet` version is `v1.35` or newer. For older versions of `kubelet`, a preflight warning is displayed.
  
  To allow cgroups v1 with `kubeadm` and `kubelet` version `v1.35` or newer, you must:

- kubeadm: removed the deprecated flag `--experimental-output`, please use the flag `--output` instead that serves the same purpose. Affected commands are: `kubeadm config images list`, `kubeadm token list`, `kubeadm upgrade plan`, `kubeadm certs check-expiration`. ([#126914](https://github.com/kubernetes/kubernetes/pull/126914),...

- kubeadm: if the `NodeLocalCRISocket` feature gate is enabled, remove the `kubeadm.alpha.kubernetes.io/cri-socket` annotation from a given node on `kubeadm upgrade`. ([#129279](https://github.com/kubernetes/kubernetes/pull/129279), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG Cluster Lifecycle and Testing]

- Kubeadm: fix a bug where kubeadm upgrade is failed if the content of the `kubeadm-flags.env` file is `KUBELET_KUBEADM_ARGS=""` ([#136127](https://github.com/kubernetes/kubernetes/pull/136127), [@carlory](https://github.com/carlory)) [SIG Cluster Lifecycle]

- kubeadm: added the `WaitForAllControlPlaneComponents` feature gate. It could be used to tell kubeadm to wait for all control plane components to be ready when running "kubeadm init" or "kubeadm join --control-plane". Previously, kubeadm only waited for the kube-apiserver. The "kubeadm join" workflow now includes a new experimental phase called "wait-control-plane". This phase was marked as non-experimental...

- Kubeadm: graduated the kubeadm specific feature gate `WaitForAllControlPlaneComponents` to GA. The feature gate is was locked to always be enabled and on node initialization kubeadm performed a health check for all control plane components and not only the...

- Kubeadm: add `--feature-gates` flag for `kubeadm upgrade node` ([#118316](https://github.com/kubernetes/kubernetes/pull/118316), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

- Kubeadm: removed the `UnversionedKubeletConfigMap` feature gate. The feature has been GA and locked to enabled since `v1.25`. ([#113448](https://github.com/kubernetes/kubernetes/pull/113448), [@pacoxu](https://github.com/pacoxu))

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