[zh] Sync changes to kubeadm reference

This PR syncs changes made to kubeadm reference in 1.20.

content/zh/docs/reference/setup-tools/kubeadm/kubeadm-alpha.md

@@ -4,11 +4,6 @@ content_type: concept
 weight: 90
 ---
 <!--
-
-reviewers:
-- mikedanese
-- luxas
-- jbeda
 title: kubeadm alpha
 content_type: concept
 weight: 90
@@ -19,85 +14,10 @@ weight: 90
 `kubeadm alpha` provides a preview of a set of features made available for gathering feedback
  from the community. Please try it out and give us feedback!
  -->
-`kubeadm alpha` 提供了一组可用于收集社区反馈的功能的预览。
-请尝试一下这些功能并给我们反馈！
+`kubeadm alpha` 提供了一组可用于收集社区反馈的预览性质功能。
+请试用这些功能并给我们提供反馈！
 {{< /caution >}}
 
-## kubeadm alpha certs {#cmd-certs}
-
-<!-- A collection of operations for operating Kubernetes certificates. -->
-Kubernetes 证书的操作集合。
-
-{{< tabs name="tab-certs" >}}
-{{< tab name="overview" include="generated/kubeadm_alpha_certs.md" />}}
-{{< /tabs >}}
-
-## kubeadm alpha certs renew {#cmd-certs-renew}
-
-<!--
-You can renew all Kubernetes certificates using the `all` subcommand or renew them selectively.
-For more details about certificate expiration and renewal see the [certificate management documentation](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/).
--->
-使用 `all` 子命令来更新所有 Kubernetes 证书或有选择性地更新它们。
-有关证书到期和续订的更多详细信息，
-请参见[证书管理文档](/zh/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/)。
-
-{{< tabs name="tab-certs-renew" >}}
-{{< tab name="renew" include="generated/kubeadm_alpha_certs_renew.md" />}}
-{{< tab name="all" include="generated/kubeadm_alpha_certs_renew_all.md" />}}
-{{< tab name="admin.conf" include="generated/kubeadm_alpha_certs_renew_admin.conf.md" />}}
-{{< tab name="apiserver-etcd-client" include="generated/kubeadm_alpha_certs_renew_apiserver-etcd-client.md" />}}
-{{< tab name="apiserver-kubelet-client" include="generated/kubeadm_alpha_certs_renew_apiserver-kubelet-client.md" />}}
-{{< tab name="apiserver" include="generated/kubeadm_alpha_certs_renew_apiserver.md" />}}
-{{< tab name="controller-manager.conf" include="generated/kubeadm_alpha_certs_renew_controller-manager.conf.md" />}}
-{{< tab name="etcd-healthcheck-client" include="generated/kubeadm_alpha_certs_renew_etcd-healthcheck-client.md" />}}
-{{< tab name="etcd-peer" include="generated/kubeadm_alpha_certs_renew_etcd-peer.md" />}}
-{{< tab name="etcd-server" include="generated/kubeadm_alpha_certs_renew_etcd-server.md" />}}
-{{< tab name="front-proxy-client" include="generated/kubeadm_alpha_certs_renew_front-proxy-client.md" />}}
-{{< tab name="scheduler.conf" include="generated/kubeadm_alpha_certs_renew_scheduler.conf.md" />}}
-{{< /tabs >}}
-
-## kubeadm alpha certs certificate-key {#cmd-certs-certificate-key}
-
-<!--
-This command can be used to generate a new control-plane certificate key.
-The key can be passed as `--certificate-key` to `kubeadm init` and `kubeadm join`
-to enable the automatic copy of certificates when joining additional control-plane nodes.
--->
-该命令可用于生成新的控制平面证书密钥。
-密钥可以作为 `--certificate-key` 参数传递给 `kubeadm init` 和 `kubeadm join` 操作，
-以在加入其他控制平面节点时启用证书的自动复制。
-
-{{< tabs name="tab-certs-certificate-key" >}}
-{{< tab name="certificate-key" include="generated/kubeadm_alpha_certs_certificate-key.md" />}}
-{{< /tabs >}}
-
-## kubeadm alpha certs generate-csr {#cmd-certs-generate-csr}
-
-<!-- 
-This command can be used to generate certificate signing requests (CSRs) which
-can be submitted to a certificate authority (CA) for signing.
--->
-该命令可用于生成证书签名请求（CSR），CSR 可以将其提交给证书颁发机构（CA）进行签名。
-
-{{< tabs name="tab-certs-generate-csr" >}}
-{{< tab name="certificate-generate-csr" include="generated/kubeadm_alpha_certs_generate-csr.md" />}}
-{{< /tabs >}}
-
-## kubeadm alpha certs check-expiration {#cmd-certs-check-expiration}
-
-<!--
-This command checks expiration for the certificates in the local PKI managed by kubeadm.
-For more details about certificate expiration and renewal see the [certificate management documentation](/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/).
--->
-此命令检查 kubeadm 管理的本地 PKI 中证书的到期时间。
-有关证书到期和续订的更多详细信息，请参见
-[证书管理文档](/zh/docs/tasks/administer-cluster/kubeadm/kubeadm-certs/)。
-
-{{< tabs name="tab-certs-check-expiration" >}}
-{{< tab name="check-expiration" include="generated/kubeadm_alpha_certs_check-expiration.md" />}}
-{{< /tabs >}}
-
 ## kubeadm alpha kubeconfig user {#cmd-phase-kubeconfig}
 
 <!--
@@ -122,7 +42,6 @@ Use the following command to enable the DynamicKubeletConfiguration feature.
 {{< tab name="enable-dynamic" include="generated/kubeadm_alpha_kubelet_config_enable-dynamic.md" />}}
 {{< /tabs >}}
 
-
 ## kubeadm alpha selfhosting pivot {#cmd-selfhosting}
 
 <!--
@@ -136,7 +55,6 @@ The subcommand `pivot` can be used to convert a static Pod-hosted control plane
 [Documentation](/docs/setup/production-environment/tools/kubeadm/self-hosting/)
 -->
 
-
 {{< tabs name="selfhosting" >}}
 {{< tab name="selfhosting" include="generated/kubeadm_alpha_selfhosting.md" />}}
 {{< tab name="pivot" include="generated/kubeadm_alpha_selfhosting_pivot.md" />}}
@@ -149,6 +67,13 @@ The subcommand `pivot` can be used to convert a static Pod-hosted control plane
 * [kubeadm join](/docs/reference/setup-tools/kubeadm/kubeadm-join/) to connect a node to the cluster
 * [kubeadm reset](/docs/reference/setup-tools/kubeadm/kubeadm-reset/) to revert any changes made to this host by `kubeadm init` or `kubeadm join`
 -->
-* [kubeadm init](/zh/docs/reference/setup-tools/kubeadm/kubeadm-init/) 引导 Kubernetes 控制平面节点
-* [kubeadm join](/zh/docs/reference/setup-tools/kubeadm/kubeadm-join/) 将节点连接到集群
-* [kubeadm reset](/zh/docs/reference/setup-tools/kubeadm/kubeadm-reset/) 会还原 `kubeadm init` 或 `kubeadm join` 操作对主机所做的任何更改。
+* 用来启动引导 Kubernetes 控制平面节点的
+  [kubeadm init](/zh/docs/reference/setup-tools/kubeadm/kubeadm-init/)
+  命令
+* 用来将节点连接到集群的
+  [kubeadm join](/zh/docs/reference/setup-tools/kubeadm/kubeadm-join/) 
+  命令
+* 用来还原 `kubeadm init` 或 `kubeadm join` 操作对主机所做的任何更改的
+  [kubeadm reset](/zh/docs/reference/setup-tools/kubeadm/kubeadm-reset/)
+  命令
+