* Added --config-map and --config-map-namespace command line options.
    * If --config-map is set, kube-dns will load dynamic configuration from the config map
      referenced by --config-map-namespace, --config-map. The config-map supports
      the following properties: "federations".
    * --federations flag is now deprecated. Prefer to set federations via the config-map.

- Kubeadm:  'kubeadm alpha kubelet config download' has been removed, please use 'kubeadm upgrade node phase kubelet-config' instead ([#87944](https://github.com/kubernetes/kubernetes/pull/87944), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]

   * -viper-config can be used to set also the options defined by command line flags
   * the default config file is "e2e.yaml/toml/json/..." and the test starts when no such config is found (as before) but if -viper-config is used, the config file must exist
   * -viper-config can be used to select a file with full path, with or without file suffix

kubeadm-config Before:

```
apiVersion: v1
kind: ConfigMap
metadata:
  name: kubeadm-config
data:
  MasterConfiguration: |
    kubeProxy:
      config:
        featureGates: "SupportIPVSProxyMode=true"
```

- Add flag --lease-max-object-size and metric etcd_lease_object_counts for kube-apiserver to config and observe max objects attached to a single etcd lease. ([#97480](https://github.com/kubernetes/kubernetes/pull/97480), [@lingsamuel](https://github.com/lingsamuel)) [SIG API Machinery, Instrumentation and Scalability]

  * No longer updates the last-applied-configuration annotation when --save-config is unspecified or false. ([#41924](https://github.com/kubernetes/kubernetes/pull/41924), [@ymqytw](https://github.com/ymqytw))
  * Fixes issue that caused apply to revert changes made by edit

#### Bug fixes

apiServerExtraArgs:
  cloud-provider: "{cloud}"
  cloud-config: "{cloud-config-path}"
apiServerExtraVolumes:
- name: cloud
  hostPath: "{cloud-config-path}"
  mountPath: "{cloud-config-path}"
controllerManagerExtraArgs:
  cloud-provider: "{cloud}"
  cloud-config: "{cloud-config-path}"
controllerManagerExtraVolumes:
- name: cloud
  hostPath: "{cloud-config-path}"
  mountPath: "{cloud-config-path}"
```

### Bug or Regression

- Bump system-validators to v1.9.2: remove version-specific cgroup kernel config checks to avoid false failures on cgroup v2 systems when v1-only configs are missing. ([#134086](https://github.com/kubernetes/kubernetes/pull/134086), [@pacoxu](https://github.com/pacoxu)) [SIG Cluster Lifecycle]

- Promoted the `APIServerTracing` feature gate to GA. The `--tracing-config-file` flag accepted `TracingConfiguration` in version `apiserver.config.k8s.io/v1` (with no changes from `apiserver.config.k8s.io/v1beta1`). ([#132340](https://github.com/kubernetes/kubernetes/pull/132340), [@dashpole](https://github.com/dashpole)) [SIG API Machinery and Testing]