[zh] Tidy up and fix links in tasks section (6/10)
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@@ -1,19 +1,15 @@
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---
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reviewers:
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- johnbelamaric
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title: 使用 CoreDNS 进行服务发现
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min-kubernetes-server-version: v1.9
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content_type: task
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---
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<!--
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---
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reviewers:
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- johnbelamaric
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title: Using CoreDNS for Service Discovery
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min-kubernetes-server-version: v1.9
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content_type: task
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---
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-->
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<!-- overview -->
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@@ -23,55 +19,50 @@ This page describes the CoreDNS upgrade process and how to install CoreDNS inste
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-->
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此页面介绍了 CoreDNS 升级过程以及如何安装 CoreDNS 而不是 kube-dns。
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## {{% heading "prerequisites" %}}
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{{< include "task-tutorial-prereqs.md" >}} {{< version-check >}}
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<!-- steps -->
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<!--
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## About CoreDNS
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-->
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## 关于 CoreDNS
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<!--
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[CoreDNS](https://coredns.io) is a flexible, extensible DNS server that can serve as the Kubernetes cluster DNS.
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Like Kubernetes, the CoreDNS project is hosted by the {{< glossary_tooltip text="CNCF" term_id="cncf" >}}.
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-->
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[CoreDNS](https://coredns.io) 是一个灵活可扩展的 DNS 服务器,可以作为 Kubernetes 集群 DNS。与 Kubernetes 一样,CoreDNS 项目由 {{< glossary_tooltip text="CNCF" term_id="cncf" >}} 托管。
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## 关于 CoreDNS
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[CoreDNS](https://coredns.io) 是一个灵活可扩展的 DNS 服务器,可以作为 Kubernetes 集群 DNS。
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与 Kubernetes 一样,CoreDNS 项目由 {{< glossary_tooltip text="CNCF" term_id="cncf" >}} 托管。
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<!--
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You can use CoreDNS instead of kube-dns in your cluster by replacing kube-dns in an existing
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deployment, or by using tools like kubeadm that will deploy and upgrade the cluster for you.
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-->
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通过在现有的集群中替换 kube-dns,可以在集群中使用 CoreDNS 代替 kube-dns 部署,或者使用 kubeadm 等工具来为您部署和升级集群。
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通过在现有的集群中替换 kube-dns,可以在集群中使用 CoreDNS 代替 kube-dns 部署,
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或者使用 kubeadm 等工具来为你部署和升级集群。
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<!--
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## Installing CoreDNS
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-->
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## 安装 CoreDNS
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<!--
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For manual deployment or replacement of kube-dns, see the documentation at the
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[CoreDNS GitHub project.](https://github.com/coredns/deployment/tree/master/kubernetes)
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-->
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有关手动部署或替换 kube-dns,请参阅 [CoreDNS GitHub 工程](https://github.com/coredns/deployment/tree/master/kubernetes)。
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## 安装 CoreDNS
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有关手动部署或替换 kube-dns,请参阅
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[CoreDNS GitHub 工程](https://github.com/coredns/deployment/tree/master/kubernetes)。
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<!--
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## Migrating to CoreDNS
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### Upgrading an existing cluster with kubeadm
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-->
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## 迁移到 CoreDNS
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<!--
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## Upgrading an existing cluster with kubeadm
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-->
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## 使用 kubeadm 升级现有集群
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### 使用 kubeadm 升级现有集群
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<!--
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In Kubernetes version 1.10 and later, you can also move to CoreDNS when you use `kubeadm` to upgrade
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@@ -79,14 +70,16 @@ a cluster that is using `kube-dns`. In this case, `kubeadm` will generate the Co
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("Corefile") based upon the `kube-dns` ConfigMap, preserving configurations for federation,
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stub domains, and upstream name server.
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-->
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在 Kubernetes 1.10 及更高版本中,当您使用 `kubeadm` 升级使用 `kube-dns` 的集群时,您还可以迁移到 CoreDNS。
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在本例中 `kubeadm` 将生成 CoreDNS 配置("Corefile")基于 `kube-dns` ConfigMap,保存联邦、存根域和上游名称服务器的配置。
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在 Kubernetes 1.10 及更高版本中,当你使用 `kubeadm` 升级使用 `kube-dns` 的集群时,你还可以迁移到 CoreDNS。
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在本例中 `kubeadm` 将生成 CoreDNS 配置("Corefile")基于 `kube-dns` ConfigMap,
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保存联邦、存根域和上游名称服务器的配置。
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<!--
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If you are moving from kube-dns to CoreDNS, make sure to set the `CoreDNS` feature gate to `true`
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during an upgrade. For example, here is what a `v1.11.0` upgrade would look like:
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-->
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如果您正在从 kube-dns 迁移到 CoreDNS,请确保在升级期间将 `CoreDNS` 特性门设置为 `true`。例如,`v1.11.0` 升级应该是这样的:
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如果你正在从 kube-dns 迁移到 CoreDNS,请确保在升级期间将 `CoreDNS` 特性门设置为 `true`。
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例如,`v1.11.0` 升级应该是这样的:
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```
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kubeadm upgrade apply v1.11.0 --feature-gates=CoreDNS=true
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@@ -98,8 +91,8 @@ is used by default. Follow the guide outlined [here](/docs/reference/setup-tools
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your upgraded cluster to use kube-dns.
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-->
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在 Kubernetes 版本 1.13 和更高版本中,`CoreDNS`特性门已经删除,CoreDNS 在默认情况下使用。
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如果您想升级集群以使用 kube-dns,请遵循
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[此处](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase#cmd-phase-addon) 。
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如果你想升级集群以使用 kube-dns,请遵循
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[此处](/zh/docs/reference/setup-tools/kubeadm/kubeadm-init-phase#cmd-phase-addon) 。
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<!--
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In versions prior to 1.11 the Corefile will be **overwritten** by the one created during upgrade.
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@@ -107,86 +100,92 @@ In versions prior to 1.11 the Corefile will be **overwritten** by the one create
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customizations after the new ConfigMap is up and running.
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-->
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在 1.11 之前的版本中,核心文件将被升级过程中创建的文件覆盖。
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**如果已对其进行自定义,则应保存现有的 ConfigMap。** 在新的 ConfigMap 启动并运行后,您可以重新应用自定义。
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**如果已对其进行自定义,则应保存现有的 ConfigMap。**
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在新的 ConfigMap 启动并运行后,你可以重新应用自定义。
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<!--
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If you are running CoreDNS in Kubernetes version 1.11 and later, during upgrade,
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your existing Corefile will be retained.
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-->
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如果您在 Kubernetes 1.11 及更高版本中运行 CoreDNS,则在升级期间,将保留现有的 Corefile。
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如果你在 Kubernetes 1.11 及更高版本中运行 CoreDNS,则在升级期间,将保留现有的 Corefile。
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<!--
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## Installing kube-dns instead of CoreDNS with kubeadm
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-->
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## 使用 kubeadm 安装 kube-dns 而不是 CoreDNS
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{{< note >}}
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<!--
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In Kubernetes 1.11, CoreDNS has graduated to General Availability (GA)
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and is installed by default.
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-->
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在 Kubernetes 1.11 中,CoreDNS 已经升级到通用可用性(GA),并默认安装。
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{{< note >}}
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在 Kubernetes 1.11 中,CoreDNS 已经升级到通用可用性(GA),并默认安装。
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{{< /note >}}
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<!--
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In Kubernetes 1.18, kube-dns usage with kubeadm has been deprecated and will be removed in a future version.
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-->
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{{< warning >}}
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在 Kubernetes 1.18 中,用 kubeadm 来安装 kube-dns 这一做法已经被废弃,
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会在将来版本中移除。
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{{< /warning >}}
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<!--
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To install kube-dns on versions prior to 1.13, set the `CoreDNS` feature gate
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value to `false`:
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-->
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若要在1.13之前到版本上安装 kube-dns,请将 `CoreDNS` 特性门值设置为 `false`:
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若要在 1.13 之前版本上安装 kube-dns,请将 `CoreDNS` 特性门控设置为 `false`:
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```
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```shell
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kubeadm init --feature-gates=CoreDNS=false
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```
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<!--
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For versions 1.13 and later, follow the guide outlined [here](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase#cmd-phase-addon).
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-->
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对于 1.13 版和更高版本,请遵循[此处](/docs/reference/setup-tools/kubeadm/kubeadm-init-phase#cmd-phase-addon)概述到指南。
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对于 1.13 版和更高版本,请遵循
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[此处](/zh/docs/reference/setup-tools/kubeadm/kubeadm-init-phase#cmd-phase-addon)概述到指南。
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<!--
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## Upgrading CoreDNS
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-->
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## 升级 CoreDNS
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<!--
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CoreDNS is available in Kubernetes since v1.9.
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You can check the version of CoreDNS shipped with Kubernetes and the changes made to CoreDNS [here](https://github.com/coredns/deployment/blob/master/kubernetes/CoreDNS-k8s_version.md).
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-->
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## 升级 CoreDNS
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从 v1.9 起,Kubernetes 提供了 CoreDNS。
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您可以在[此处](https://github.com/coredns/deployment/blob/master/kubernetes/CoreDNS-k8s_version.md)检查 Kubernetes 随附的 CoreDNS 版本以及对 CoreDNS 所做的更改。
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你可以在[此处](https://github.com/coredns/deployment/blob/master/kubernetes/CoreDNS-k8s_version.md)
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查看 Kubernetes 随附的 CoreDNS 版本以及对 CoreDNS 所做的更改。
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<!--
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CoreDNS can be upgraded manually in case you want to only upgrade CoreDNS or use your own custom image.
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There is a helpful [guideline and walkthrough](https://github.com/coredns/deployment/blob/master/kubernetes/Upgrading_CoreDNS.md) available to ensure a smooth upgrade.
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-->
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如果您只想升级 CoreDNS 或使用自己的自定义镜像,则可以手动升级 CoreDNS。
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如果你只想升级 CoreDNS 或使用自己的自定义镜像,则可以手动升级 CoreDNS。
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参看[指南和演练](https://github.com/coredns/deployment/blob/master/kubernetes/Upgrading_CoreDNS.md)
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文档了解如何平滑升级。
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<!--
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## Tuning CoreDNS
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-->
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## CoreDNS 调优
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<!--
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When resource utilisation is a concern, it may be useful to tune the configuration of CoreDNS. For more details, check out the
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[documentation on scaling CoreDNS]((https://github.com/coredns/deployment/blob/master/kubernetes/Scaling_CoreDNS.md)).
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-->
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当涉及到资源利用时,优化内核的配置可能是有用的。有关详细信息,请参阅 [关于扩展 CoreDNS 的文档](https://github.com/coredns/deployment/blob/master/kubernetes/Scaling_CoreDNS.md)。
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## CoreDNS 调优
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当资源利用方面有问题时,优化 CoreDNS 的配置可能是有用的。
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有关详细信息,请参阅[有关扩缩 CoreDNS 的文档](https://github.com/coredns/deployment/blob/master/kubernetes/Scaling_CoreDNS.md)。
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## {{% heading "whatsnext" %}}
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<!--
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You can configure [CoreDNS](https://coredns.io) to support many more use cases than
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kube-dns by modifying the `Corefile`. For more information, see the
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[CoreDNS site](https://coredns.io/2017/05/08/custom-dns-entries-for-kubernetes/).
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-->
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您可以通过修改 `Corefile` 来配置 [CoreDNS](https://coredns.io),以支持比 ku-dns 更多的用例。有关更多信息,请参考 [CoreDNS 网站](https://coredns.io/2017/05/08/custom-dns-entries-for-kubernetes/)。
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你可以通过修改 `Corefile` 来配置 [CoreDNS](https://coredns.io),以支持比 kube-dns 更多的用例。
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请参考 [CoreDNS 网站](https://coredns.io/2017/05/08/custom-dns-entries-for-kubernetes/)
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以了解更多信息。
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