From 2001ee8586429c8d0e6b862f99ab071c963d37fd Mon Sep 17 00:00:00 2001
From: SataQiu <qiushida@beyondcent.com>
Date: Sun, 11 Aug 2019 20:31:10 +0800
Subject: [PATCH] zh-trans: add
 zh/docs/setup/production-environment/tools/kubeadm/ha-topology.md (#15778)

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+---
+reviewers:
+- sig-cluster-lifecycle
+title: 高可用拓扑选项
+content_template: templates/concept
+weight: 50
+---
+<!--
+---
+reviewers:
+- sig-cluster-lifecycle
+title: Options for Highly Available topology
+content_template: templates/concept
+weight: 50
+---
+-->
+
+{{% capture overview %}}
+
+<!--
+This page explains the two options for configuring the topology of your highly available (HA) Kubernetes clusters.
+-->
+本页面介绍了配置高可用（HA） Kubernetes 集群拓扑的两个选项。
+
+<!--
+You can set up an HA cluster:
+-->
+您可以设置 HA 集群：
+
+<!--
+- With stacked control plane nodes, where etcd nodes are colocated with control plane nodes- With external etcd nodes, where etcd runs on separate nodes from the control plane
+-->
+ - 使用堆叠（stacked）控制平面节点，其中 etcd 节点与控制平面节点共存 
+ - 使用外部 etcd 节点，其中 etcd 在与控制平面不同的节点上运行
+
+<!--
+You should carefully consider the advantages and disadvantages of each topology before setting up an HA cluster.
+-->
+在设置 HA 集群之前，您应该仔细考虑每种拓扑的优缺点。
+
+{{% /capture %}}
+
+{{% capture body %}}
+
+<!--
+## Stacked etcd topology
+-->
+## 堆叠（Stacked） etcd 拓扑
+
+<!--
+A stacked HA cluster is a [topology](https://en.wikipedia.org/wiki/Network_topology) where the distributeddata storage cluster provided by etcd is stacked on top of the cluster formed by the nodes managed by kubeadm that run control plane components.
+-->
+堆叠（Stacked） HA 集群是一种这样的[拓扑](https://en.wikipedia.org/wiki/Network_topology)，其中 etcd 分布式数据存储集群堆叠在 kubeadm 管理的控制平面节点上，作为控制平面的一个组件运行。
+
+<!--
+Each control plane node runs an instance of the `kube-apiserver`, `kube-scheduler`, and `kube-controller-manager`.
+-->
+每个控制平面节点运行 `kube-apiserver`，`kube-scheduler` 和 `kube-controller-manager` 实例。
+<!--
+The `kube-apiserver` is exposed to worker nodes using a load balancer.
+-->
+`kube-apiserver` 使用负载均衡器暴露给工作节点。
+
+<!--
+Each control plane node creates a local etcd member and this etcd member communicate only withthe `kube-apiserver` of this node. The same applies to the local `kube-controller-manager`and `kube-scheduler` instances.
+-->
+每个控制平面节点创建一个本地 etcd 成员（member），这个 etcd 成员只与该节点的 `kube-apiserver` 通信。这同样适用于本地 `kube-controller-manager` 和 `kube-scheduler` 实例。
+
+<!--
+This topology couples the control planes and etcd members on the same nodes. It is simpler to set up than a cluster with external etcd nodes, and simpler to manage for replication.
+-->
+这种拓扑将控制平面和 etcd 成员耦合在同一节点上。相对使用外部 etcd 集群，设置起来更简单，而且更易于副本管理。
+
+<!--
+However, a stacked cluster runs the risk of failed coupling. If one node goes down, both an etcd member and a controlplane instance are lost, and redundancy is compromised. You can mitigate this risk by adding more control plane nodes.
+-->
+然而，堆叠集群存在耦合失败的风险。如果一个节点发生故障，则 etcd 成员和控制平面实例都将丢失，并且冗余会受到影响。您可以通过添加更多控制平面节点来降低此风险。
+
+<!--
+You should therefore run a minimum of three stacked control plane nodes for an HA cluster.
+-->
+因此，您应该为 HA 集群运行至少三个堆叠的控制平面节点。
+
+<!--
+This is the default topology in kubeadm. A local etcd member is created automaticallyon control plane nodes when using `kubeadm init` and `kubeadm join --experimental-control-plane`.
+-->
+这是 kubeadm 中的默认拓扑。当使用 `kubeadm init` 和 `kubeadm join --experimental-control-plane` 时，在控制平面节点上会自动创建本地 etcd 成员。
+
+<!--
+![Stacked etcd topology](/images/kubeadm/kubeadm-ha-topology-stacked-etcd.svg)
+-->
+！[堆叠的 etcd 拓扑](/images/kubeadm/kubeadm-ha-topology-stacked-etcd.svg)
+
+<!--
+## External etcd topology
+-->
+## 外部 etcd 拓扑
+
+<!--
+An HA cluster with external etcd is a [topology](https://en.wikipedia.org/wiki/Network_topology) where the distributed data storage cluster provided by etcd is external to the cluster formed by the nodes that run control plane components.
+-->
+具有外部 etcd 的 HA 集群是一种这样的[拓扑](https://en.wikipedia.org/wiki/Network_topology)，其中 etcd 分布式数据存储集群在独立于控制平面节点的其他节点上运行。
+
+<!--
+Like the stacked etcd topology, each control plane node in an external etcd topology runs an instance of the `kube-apiserver`, `kube-scheduler`, and `kube-controller-manager`. And the `kube-apiserver` is exposed to worker nodes using a load balancer. However, etcd members run on separate hosts, and each etcd host communicates with the `kube-apiserver` of each control plane node.
+-->
+就像堆叠的 etcd 拓扑一样，外部 etcd 拓扑中的每个控制平面节点都运行 `kube-apiserver`，`kube-scheduler` 和 `kube-controller-manager` 实例。同样， `kube-apiserver` 使用负载均衡器暴露给工作节点。但是，etcd 成员在不同的主机上运行，​​每个 etcd 主机与每个控制平面节点的 `kube-apiserver` 通信。
+
+<!--
+This topology decouples the control plane and etcd member. It therefore provides an HA setup wherelosing a control plane instance or an etcd member has less impact and does not affectthe cluster redundancy as much as the stacked HA topology.
+-->
+这种拓扑结构解耦了控制平面和 etcd 成员。因此，它提供了一种 HA 设置，其中失去控制平面实例或者 etcd 成员的影响较小，并且不会像堆叠的 HA 拓扑那样影响集群冗余。
+
+<!--
+However, this topology requires twice the number of hosts as the stacked HA topology.
+-->
+但是，此拓扑需要两倍于堆叠 HA 拓扑的主机数量。
+<!--
+A minimum of three hosts for control plane nodes and three hosts for etcd nodes are required for an HA cluster with this topology.
+-->
+具有此拓扑的 HA 集群至少需要三个用于控制平面节点的主机和三个用于 etcd 节点的主机。
+
+<!--
+![External etcd topology](/images/kubeadm/kubeadm-ha-topology-external-etcd.svg)
+-->
+！[外部 etcd 拓扑](/images/kubeadm/kubeadm-ha-topology-external-etcd.svg)
+
+{{% /capture %}}
+
+{{% capture whatsnext %}}
+
+<!--
+- [Set up a highly available cluster with kubeadm](/docs/setup/production-environment/tools/kubeadm/high-availability/)
+-->
+ -  [使用 kubeadm 设置高可用集群](/docs/setup/production-environment/tools/kubeadm/high-availability/)
+
+{{% /capture %}}