Improve Kubeadm reference doc (#6103)

* automatically-generated kubeadm reference doc

* user-mantained kubeadm reference doc

skip_toc_check.txt

@@ -1,6 +1,6 @@
 # Put files you want to skip table of contents entry check here:
-docs/admin/kubelet-authentication-authorization.md
-docs/admin/kubelet-tls-bootstrapping.md
+docs/reference/setup-tools/kubeadm/generated/kubelet-authentication-authorization.md
+docs/reference/setup-tools/kubeadm/generated/kubelet-tls-bootstrapping.md
 docs/api-reference/labels-annotations-taints.md
 docs/concepts/example-concept-template.md
 docs/contribute/README.md
@@ -19,3 +19,65 @@ docs/user-guide/update-demo/images/kitten/README.md
 docs/user-guide/update-demo/images/nautilus/README.md
 docs/user-guide/walkthrough/index.md
 docs/user-guide/walkthrough/k8s201.md
+docs/reference/setup-tools/kubeadm/generated/README.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_addon.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_addon_all.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_addon_kube-dns.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_addon_kube-proxy.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_bootstrap-token.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_bootstrap-token_all.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_bootstrap-token_cluster-info.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_bootstrap-token_create.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_bootstrap-token_node.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_bootstrap-token_node_allow-auto-approve.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_bootstrap-token_node_allow-post-csrs.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs_all.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs_apiserver-kubelet-client.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs_apiserver.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs_ca.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs_front-proxy-ca.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs_front-proxy-client.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_certs_sa.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_controlplane.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_controlplane_all.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_controlplane_apiserver.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_controlplane_controller-manager.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_controlplane_scheduler.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_etcd.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_etcd_local.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_kubeconfig.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_kubeconfig_admin.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_kubeconfig_all.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_kubeconfig_controller-manager.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_kubeconfig_kubelet.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_kubeconfig_scheduler.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_kubeconfig_user.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_mark-master.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_preflight.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_preflight_master.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_preflight_node.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_selfhosting.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_selfhosting_convert-from-staticpods.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_alpha_phase_upload-config.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_completion.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_config.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_config_upload.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_config_upload_from-file.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_config_upload_from-flags.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_config_view.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_init.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_join.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_reset.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_token.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_token_create.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_token_delete.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_token_generate.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_token_list.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_upgrade.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_upgrade_apply.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_upgrade_plan.md
+docs/reference/setup-tools/kubeadm/generated/kubeadm_version.md