Merge branch 'master' into patch-63

content/zh/docs/tasks/administer-cluster/kubeadm/kubeadm-certs.md

@@ -3,7 +3,6 @@ title: 使用 kubeadm 进行证书管理
 content_type: task
 weight: 10
 ---
-
 <!--
 reviewers:
 - sig-cluster-lifecycle
@@ -89,6 +88,12 @@ setting up a cluster to use an external CA.
 -->
 [PKI证书和要求](/zh/docs/setup/best-practices/certificates/)包括集群使用外部CA的设置指南。
 
+<!--
+[PKI certificates and requirements](/docs/setup/best-practices/certificates/) includes guidance on
+setting up a cluster to use an external CA.
+-->
+[PKI 证书和要求](/zh/docs/setup/best-practices/certificates/)包括关于用外部 CA 设置集群的指南。
+
 <!-- 
 ## Check certificate expiration