目前，DHorse(https://gitee.com/i512team/dhorse)只支持 Ingress-nginx 的 Ingress 实现，下面介绍 Ingress-nginx 的安装过程。
下载安装文件
首先，需要匹配 Ingress-nginx 版本和 kubernetes 版本。在https://github.com/kubernetes/ingress-nginx可以找到，如下图所示：
笔者用的 k8s 版本是 v1.21.2，需要安装 Ingress-nginx 的 v1.3.1 版本，下载如下文件：
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.3.1/deploy/static/provider/cloud/deploy.yaml
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替换镜像地址
查看该文件用到了哪些镜像：
[root@centos05 deployment]# cat deploy.yaml | grep image image: registry.k8s.io/ingress-nginx/controller:v1.3.1@sha256:54f7fe2c6c5a9db9a0ebf1131797109bb7a4d91f56b9b362bde2abd237dd1974 imagePullPolicy: IfNotPresent image: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v1.3.0@sha256:549e71a6ca248c5abd51cdb73dbc3083df62cf92ed5e6147c780e30f7e007a47 imagePullPolicy: IfNotPresent image: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v1.3.0@sha256:549e71a6ca248c5abd51cdb73dbc3083df62cf92ed5e6147c780e30f7e007a47 imagePullPolicy: IfNotPresent
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可以看出，所用到的镜像不在 docker hub 中，在 registry.k8s.io 中，由于国内的网络问题，拉取不到该仓库的镜像。幸好https://dockerproxy.com/docs提供了镜像代理，按照文档的说明，我们需要把 registry.k8s.io 地址改为 k8s.dockerproxy.com 即可，替换以后的内容为：
registry.k8s.io/ingress-nginx/controller:v1.3.1@sha256:54f7fe2c6c5a9db9a0ebf1131797109bb7a4d91f56b9b362bde2abd237dd1974 ->k8s.dockerproxy.com/ingress-nginx/controller:v1.3.1@sha256:54f7fe2c6c5a9db9a0ebf1131797109bb7a4d91f56b9b362bde2abd237dd1974
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registry.k8s.io/ingress-nginx/kube-webhook-certgen:v1.3.0@sha256:549e71a6ca248c5abd51cdb73dbc3083df62cf92ed5e6147c780e30f7e007a47 ->k8s.dockerproxy.com/ingress-nginx/kube-webhook-certgen:v1.3.0@sha256:549e71a6ca248c5abd51cdb73dbc3083df62cf92ed5e6147c780e30f7e007a47
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安装
保存以后，部署 ingress-nginx:
[root@centos05 deployment]# kubectl apply -f deploy.yaml namespace/ingress-nginx createdserviceaccount/ingress-nginx createdserviceaccount/ingress-nginx-admission createdrole.rbac.authorization.k8s.io/ingress-nginx createdrole.rbac.authorization.k8s.io/ingress-nginx-admission createdclusterrole.rbac.authorization.k8s.io/ingress-nginx createdclusterrole.rbac.authorization.k8s.io/ingress-nginx-admission createdrolebinding.rbac.authorization.k8s.io/ingress-nginx createdrolebinding.rbac.authorization.k8s.io/ingress-nginx-admission createdclusterrolebinding.rbac.authorization.k8s.io/ingress-nginx createdclusterrolebinding.rbac.authorization.k8s.io/ingress-nginx-admission createdconfigmap/ingress-nginx-controller createdservice/ingress-nginx-controller createdservice/ingress-nginx-controller-admission createddeployment.apps/ingress-nginx-controller createdjob.batch/ingress-nginx-admission-create createdjob.batch/ingress-nginx-admission-patch createdingressclass.networking.k8s.io/nginx createdvalidatingwebhookconfiguration.admissionregistration.k8s.io/ingress-nginx-admission created
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查看结果：
[root@centos05 deployment]# kubectl get pods -n ingress-nginx -o wideNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATESingress-nginx-admission-create-fq2kq 0/1 Completed 0 11s 10.32.1.89 centos06 <none> <none>ingress-nginx-admission-patch-fkphb 0/1 Completed 1 11s 10.32.1.90 centos06 <none> <none>ingress-nginx-controller-5c79d9494c-rh5rn 0/1 Running 0 11s 10.32.1.91 centos06 <none> <none>
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访问 ingress-nginx-controller 的 ip，如下：
[root@centos05 deployment]# curl http://10.32.1.91<html><head><title>404 Not Found</title></head><body><center><h1>404 Not Found</h1></center><hr><center>nginx</center></body></html>
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验证 Ingress
假如，我们有一个名为 hello-gradle 的应用，并且有一个/hello 的服务接口，并且绑定了名为 www.hello-gradle.com 的域名，如下图所示：
部署完该应用以后，在集群的任意节点配置 host 如下：
[root@centos06 deployment]# vim /etc/hosts10.244.0.13 www.hello-gradle.com
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然后通过域名访问/hello 服务，如下：
[root@centos05 deployment]# curl http://www.hello-gradle.com/helloHello!
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