[zh] Sync dns-horizontal-autoscaling.md

Author: windsonsea

content/zh-cn/docs/tasks/administer-cluster/configure-upgrade-etcd.md

@@ -609,39 +609,39 @@ etcd 支持从 [major.minor](http://semver.org/) 或其他不同 patch 版本的
 Before starting the restore operation, a snapshot file must be present. It can
 either be a snapshot file from a previous backup operation, or from a remaining
 [data directory](https://etcd.io/docs/current/op-guide/configuration/#--data-dir).
-Here is an example:
 -->
 在启动还原操作之前，必须有一个快照文件。它可以是来自以前备份操作的快照文件，
 也可以是来自剩余[数据目录](https://etcd.io/docs/current/op-guide/configuration/#--data-dir)的快照文件。
-例如：
-
-```shell
-ETCDCTL_API=3 etcdctl --endpoints 10.2.0.9:2379 snapshot restore snapshot.db
-```
 
 <!--
-Another example for restoring using `etcdctl` options:
+When restoring the cluster, use the `--data-dir` option to specify to which folder the cluster should be restored:
 -->
-恢复时使用 `etcdctl` 选项的另一个示例：
+在恢复集群时，使用 `--data-dir` 选项来指定集群应被恢复到哪个文件夹。
 
 ```shell
-ETCDCTL_API=3 etcdctl snapshot restore --data-dir <data-dir-location> snapshot.db
+ETCDCTL_API=3 etcdctl --data-dir <data-dir-location> snapshot restore snapshot.db
 ```
 
 <!--
 where `<data-dir-location>` is a directory that will be created during the restore process.
 
-Yet another example would be to first export the `ETCDCTL_API` environment variable
+Yet another example would be to first export the `ETCDCTL_API` environment variable:
 -->
 其中 `<data-dir-location>` 是将在恢复过程中创建的目录。
 
 另一个例子是先导出 `ETCDCTL_API` 环境变量：
 
 ```shell
 export ETCDCTL_API=3
-etcdctl snapshot restore --data-dir <data-dir-location> snapshot.db
+etcdctl --data-dir <data-dir-location> snapshot restore snapshot.db
 ```
 
+<!--
+If `<data-dir-location>` is the same folder as before, delete it and stop etcd process before restoring the cluster. Else change etcd configuration and restart the etcd process after restoration to make it use the new data directory.
+-->
+如果 `<data-dir-location>` 与之前的文件夹相同，请先删除此文件夹并停止 etcd 进程，再恢复集群。
+否则，需要在恢复后更改 etcd 配置并重新启动 etcd 进程才能使用新的数据目录。
+
 <!--
 For more information and examples on restoring a cluster from a snapshot file, see
 [etcd disaster recovery documentation](https://etcd.io/docs/current/op-guide/recovery/#restoring-a-cluster).

content/zh-cn/docs/tasks/administer-cluster/dns-horizontal-autoscaling.md

@@ -29,7 +29,6 @@ your Kubernetes cluster.
 
 * 确保 [Kubernetes DNS](/zh-cn/docs/concepts/services-networking/dns-pod-service/) 已启用。
 
-
 <!-- steps -->
 
 <!--
@@ -38,7 +37,7 @@ your Kubernetes cluster.
 List the {{< glossary_tooltip text="Deployments" term_id="deployment" >}}
 in your cluster in the kube-system {{< glossary_tooltip text="namespace" term_id="namespace" >}}:
 -->
-## 确定是否 DNS 水平自动扩缩特性已经启用 {#determining-whether-dns-horizontal-autoscaling-is-already-enabled}
+## 确定是否 DNS 水平自动扩缩特性已经启用  {#determining-whether-dns-horizontal-autoscaling-is-already-enabled}
 
 在 kube-system {{< glossary_tooltip text="命名空间" term_id="namespace" >}}中列出集群中的
 {{< glossary_tooltip text="Deployment" term_id="deployment" >}}：
@@ -53,26 +52,26 @@ The output is similar to this:
 输出类似如下这样：
 
 ```
-NAME  READY UP-TO-DATE AVAILABLE AGE
+NAME READY UP-TO-DATE AVAILABLE AGE
 ...
-dns-autoscaler  1/1 1 1 ...
+kube-dns-autoscaler 1/1 1 1 ...
 ...
 ```
 
 <!--
-If you see "dns-autoscaler" in the output, DNS horizontal autoscaling is
+If you see "kube-dns-autoscaler" in the output, DNS horizontal autoscaling is
 already enabled, and you can skip to
 [Tuning autoscaling parameters](#tuning-autoscaling-parameters).
 -->
-如果在输出中看到 “dns-autoscaler”，说明 DNS 水平自动扩缩已经启用，
+如果在输出中看到 “kube-dns-autoscaler”，说明 DNS 水平自动扩缩已经启用，
 可以跳到[调优 DNS 自动扩缩参数](#tuning-autoscaling-parameters)。
 
 <!--
 ## Get the name of your DNS Deployment {#find-scaling-target}
 
 List the DNS deployments in your cluster in the kube-system namespace:
 -->
-## 获取 DNS Deployment 的名称 {#find-scaling-target}
+## 获取 DNS Deployment 的名称  {#find-scaling-target}
 
 列出集群内 kube-system 命名空间中的 DNS Deployment：
 
@@ -122,12 +121,12 @@ the name of your Deployment for DNS is coredns, your scale target is Deployment/
 其中 `<your-deployment-name>` 是 DNS Deployment 的名称。
 例如，如果你的 DNS Deployment 名称是 `coredns`，则你的扩展目标是 Deployment/coredns。
 
+{{< note >}}
 <!--
 CoreDNS is the default DNS service for Kubernetes. CoreDNS sets the label
 `k8s-app=kube-dns` so that it can work in clusters that originally used
 kube-dns.
 -->
-{{< note >}}
 CoreDNS 是 Kubernetes 的默认 DNS 服务。CoreDNS 设置标签 `k8s-app=kube-dns`，
 以便能够在原来使用 `kube-dns` 的集群中工作。
 {{< /note >}}
@@ -155,7 +154,7 @@ In the file, replace `<SCALE_TARGET>` with your scale target.
 Go to the directory that contains your configuration file, and enter this
 command to create the Deployment:
 -->
-在文件中，将 `<SCALE_TARGET>` 替换成扩缩目标。
+在此文件中，将 `<SCALE_TARGET>` 替换成扩缩目标。
 
 进入到包含配置文件的目录中，输入如下命令创建 Deployment：
 
@@ -166,25 +165,25 @@ kubectl apply -f dns-horizontal-autoscaler.yaml
 <!--
 The output of a successful command is:
 -->
-一个成功的命令输出是：
+命令成功执行后的输出为：
 
 ```
-deployment.apps/dns-autoscaler created
+deployment.apps/kube-dns-autoscaler created
 ```
 
 <!--
 DNS horizontal autoscaling is now enabled.
 -->
-DNS 水平自动扩缩在已经启用了。
+DNS 水平自动扩缩现在已经启用了。
 
 <!--
 ## Tune DNS autoscaling parameters {#tuning-autoscaling-parameters}
 
-Verify that the dns-autoscaler {{< glossary_tooltip text="ConfigMap" term_id="configmap" >}} exists:
+Verify that the kube-dns-autoscaler {{< glossary_tooltip text="ConfigMap" term_id="configmap" >}} exists:
 -->
 ## 调优 DNS 自动扩缩参数 {#tuning-autoscaling-parameters}
 
-验证 dns-autoscaler {{< glossary_tooltip text="ConfigMap" term_id="configmap" >}} 是否存在：
+验证 kube-dns-autoscaler {{< glossary_tooltip text="ConfigMap" term_id="configmap" >}} 是否存在：
 
 ```shell
 kubectl get configmap --namespace=kube-system
@@ -198,17 +197,17 @@ The output is similar to this:
 ```
 NAME DATA AGE
 ...
-dns-autoscaler  1 ...
+kube-dns-autoscaler 1 ...
 ...
 ```
 
 <!--
 Modify the data in the ConfigMap:
 -->
-修改该 ConfigMap 中的数据：
+修改此 ConfigMap 中的数据：
 
 ```shell
-kubectl edit configmap dns-autoscaler --namespace=kube-system
+kubectl edit configmap kube-dns-autoscaler --namespace=kube-system
 ```
 
 <!--
@@ -225,7 +224,6 @@ Modify the fields according to your needs. The "min" field indicates the
 minimal number of DNS backends. The actual number of backends is
 calculated using this equation:
 -->
-
 根据需要修改对应的字段。“min” 字段表明 DNS 后端的最小数量。
 实际后端的数量通过使用如下公式来计算：
 
@@ -258,21 +256,21 @@ There are other supported scaling patterns. For details, see
 There are a few options for tuning DNS horizontal autoscaling. Which option to
 use depends on different conditions.
 -->
-## 禁用 DNS 水平自动扩缩
+## 禁用 DNS 水平自动扩缩 {#disable-dns-horizontal-autoscaling}
 
 有几个可供调优的 DNS 水平自动扩缩选项。具体使用哪个选项因环境而异。
 
 <!--
-### Option 1: Scale down the dns-autoscaler deployment to 0 replicas
+### Option 1: Scale down the kube-dns-autoscaler deployment to 0 replicas
 
 This option works for all situations. Enter this command:
 -->
-### 选项 1：缩容 dns-autoscaler Deployment 至 0 个副本
+### 选项 1：kube-dns-autoscaler Deployment 缩容至 0 个副本
 
-该选项适用于所有场景。运行如下命令：
+此选项适用于所有场景。运行如下命令：
 
 ```shell
-kubectl scale deployment --replicas=0 dns-autoscaler --namespace=kube-system
+kubectl scale deployment --replicas=0 kube-dns-autoscaler --namespace=kube-system
 ```
 
 <!--
@@ -281,7 +279,7 @@ The output is:
 输出如下所示：
 
 ```
-deployment.apps/dns-autoscaler scaled
+deployment.apps/kube-dns-autoscaler scaled
 ```
 
 <!--
@@ -301,22 +299,22 @@ The output displays 0 in the DESIRED and CURRENT columns:
 ```
 NAME DESIRED CURRENT READY AGE
 ...
-dns-autoscaler-6b59789fc8 0 0 0 ...
+kube-dns-autoscaler-6b59789fc8 0 0 0 ...
 ...
 ```
 
 <!--
-### Option 2: Delete the dns-autoscaler deployment
+### Option 2: Delete the kube-dns-autoscaler deployment
 
-This option works if dns-autoscaler is under your own control, which means
+This option works if kube-dns-autoscaler is under your own control, which means
 no one will re-create it:
 -->
-### 选项 2：删除 dns-autoscaler Deployment
+### 选项 2：删除 kube-dns-autoscaler Deployment
 
-如果 dns-autoscaler 为你所控制，也就说没有人会去重新创建它，可以选择此选项：
+如果 kube-dns-autoscaler 为你所控制，也就说没有人会去重新创建它，可以选择此选项：
 
 ```shell
-kubectl delete deployment dns-autoscaler --namespace=kube-system
+kubectl delete deployment kube-dns-autoscaler --namespace=kube-system
 ```
 
 <!--
@@ -325,38 +323,37 @@ The output is:
 输出内容如下所示：
 
 ```
-deployment.apps "dns-autoscaler" deleted
+deployment.apps "kube-dns-autoscaler" deleted
 ```
 
 <!--
-### Option 3: Delete the dns-autoscaler manifest file from the master node
+### Option 3: Delete the kube-dns-autoscaler manifest file from the master node
 
-This option works if dns-autoscaler is under control of the (deprecated)
+This option works if kube-dns-autoscaler is under control of the (deprecated)
 [Addon Manager](https://git.k8s.io/kubernetes/cluster/addons/README.md),
 and you have write access to the master node.
 -->
+### 选项 3：从主控节点删除 kube-dns-autoscaler 清单文件
 
-### 选项 3：从主控节点删除 dns-autoscaler 清单文件
-
-如果 dns-autoscaler 在[插件管理器](https://git.k8s.io/kubernetes/cluster/addons/README.md)
-的控制之下，并且具有操作 master 节点的写权限，可以使用此选项。
+如果 kube-dns-autoscaler 在[插件管理器](https://git.k8s.io/kubernetes/cluster/addons/README.md)
+的控制之下，并且具有操作主控节点的写权限，可以使用此选项。
 
 <!--
 Sign in to the master node and delete the corresponding manifest file.
-The common path for this dns-autoscaler is:
+The common path for this kube-dns-autoscaler is:
 -->
-登录到主控节点，删除对应的清单文件。 
-dns-autoscaler 对应的路径一般为：
+登录到主控节点，删除对应的清单文件。
+kube-dns-autoscaler 对应的路径一般为：
 
 ```
 /etc/kubernetes/addons/dns-horizontal-autoscaler/dns-horizontal-autoscaler.yaml
 ```
 
 <!--
 After the manifest file is deleted, the Addon Manager will delete the
-dns-autoscaler Deployment.
+kube-dns-autoscaler Deployment.
 -->
-当清单文件被删除后，插件管理器将删除 dns-autoscaler Deployment。
+当清单文件被删除后，插件管理器将删除 kube-dns-autoscaler Deployment。
 
 <!-- discussion -->
 
@@ -369,7 +366,7 @@ the DNS service.
 * An autoscaler Pod runs a client that polls the Kubernetes API server for the
 number of nodes and cores in the cluster.
 -->
-## 理解 DNS 水平自动扩缩工作原理
+## 理解 DNS 水平自动扩缩工作原理 {#understanding-how-dns-horizontal-autoscaling-works}
 
 * cluster-proportional-autoscaler 应用独立于 DNS 服务部署。
 
@@ -405,7 +402,6 @@ patterns: *linear* and *ladder*.
 * Read about [Guaranteed Scheduling For Critical Add-On Pods](/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/).
 * Learn more about the
 [implementation of cluster-proportional-autoscaler](https://github.com/kubernetes-sigs/cluster-proportional-autoscaler).
-
 -->
 * 阅读[为关键插件 Pod 提供的调度保障](/zh-cn/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/)。
 * 进一步了解 [cluster-proportional-autoscaler 实现](https://github.com/kubernetes-sigs/cluster-proportional-autoscaler)。