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Update coredns.md

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TrojanY 2018-04-17 12:16:24 +08:00 committed by GitHub
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@ -8,6 +8,8 @@ Kubernetes集群中读取区（zone）数据。它实现了为Kubernetes的DNS
## 部署CoreDNS需要使用到官方的提供的两个文件 [deploy.sh](https://github.com/coredns/deployment/blob/master/kubernetes/deploy.sh)和[coredns.yaml.sed](https://github.com/coredns/deployment/blob/master/kubernetes/coredns.yaml.sed)
(这两个文件已经放入manifest的[coredns](/manifest/coredns)中)
`deploy.sh` 是一个用于在已经运行kube-dns的集群中生成运行CoreDNS部署文件（manifest）的工具脚本。它使用
'coredns.yaml.sed'文件作为模板，创建一个ConfigMap和CoreDNS的deployment, 然后更新集群中已有的kube-dns
服务的selector使用CoreDNS的deployment。重用已有的服务并不会在服务的请求中发生冲突。