update glossary

content/zh/docs/reference/glossary/etcd.md

@@ -17,7 +17,7 @@ tags:
 title: etcd
 id: etcd
 date: 2018-04-12
-full_link: /zh/docs/tasks/administer-cluster/configure-upgrade-etcd/
+full_link: /docs/tasks/administer-cluster/configure-upgrade-etcd/
 short_description: >
   Consistent and highly-available key value store used as Kubernetes' backing store for all cluster data.
 
@@ -35,9 +35,14 @@ tags:
 etcd 是兼具一致性和高可用性的键值数据库，可以作为保存 Kubernetes 所有集群数据的后台数据库。
 
 <!--more--> 
-
 <!--
-Always have a backup plan for etcd's data for your Kubernetes cluster. For in-depth information on etcd, see [etcd documentation](https://etcd.io/docs).
+If your Kubernetes cluster uses etcd as its backing store, make sure you have a
+[back up](/docs/tasks/administer-cluster/configure-upgrade-etcd/#backing-up-an-etcd-cluster) plan
+for those data.
+-->	
+您的 Kubernetes 集群的 etcd 数据库通常需要有个备份计划。
+<!--
+You can find in-depth information about etcd in the official [documentation](https://etcd.io/docs/).
 -->
 
-您的 Kubernetes 集群的 etcd 数据库通常需要有个备份计划。要了解 etcd 更深层次的信息，请参考 [etcd 文档](https://etcd.io/docs)。
+要了解 etcd 更深层次的信息，请参考 [etcd 文档](https://etcd.io/docs/)。