我要评论环境：
linux：centos linux release 7.9.2009 (core)
kubernetes：v1.23.5
dokcer：20.10.14
一、安装ingress-nginx
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.1.1/deploy/static/provider/cloud/deploy.yaml
二、修改deploy.yaml文件
1、注释掉external traffic policy：local
2、因默认镜像源国内无法访问 ，修改为dockerhub上的镜像源
修改controller/deploy的image:
image: bitnami/nginx-ingress-controller:1.1.2
修改ingress.nginx-admission-create的image:
image: liangjw/kube-webhook-certgen:v1.1.1
修改ingress-nginx-admission-patch的image:
image: liangjw/kube-webhook-certgen:v1.1.1
三、部署ingress-nginx
# kubectl apply -f deploy.yaml 查看pods部署状态 # kubectl get pods -n ingress-nginx -w name ready status restarts age ingress-nginx-admission-create-2mp7n 0/1 completed 0 3s ingress-nginx-admission-patch-xrdf5 0/1 completed 0 3s ingress-nginx-controller-859fb9b444-zq4n6 0/1 running 0 3s ingress-nginx-controller-859fb9b444-zq4n6 1/1 running 0 20s
部署过程中可能遇到的报错如下
1、ingress-nginx-admission-create和ingress-nginx-admission-patch部署失败，报错如下
# kubectl logs -n ingress-nginx ingress-nginx-admission-create-bj4d4
w0418 01:48:48.738693 1 client_config.go:615] neither --kubeconfig nor --master was specified. using the inclusterconfig. this might not work.
{"err":"get \"https://10.20.0.1:443/api/v1/namespaces/ingress-nginx/secrets/ingress-nginx-admission\": dial tcp 10.20.0.1:443: i/o timeout","level":"fatal","msg":"error getting secret","source":"k8s/k8s.go:232","time":"2022-04-18t01:49:18z"}解决方法：
在deploy.yaml中ingress-nginx-admission-create和ingress-nginx-admission-patch的job资源下的spec.template.spec中添加如下hostnetwork: true，重新部署
2、ingress-nginx-controller报错如下：
# kubectl describe pod -n ingress-nginx ingress-nginx-controller-55bc668cd8-fbrjn warning failedmount 8m51s (x3 over 8m53s) kubelet mountvolume.setup failed for volume "webhook-cert" : secret "ingress-nginx-admission" not found normal pulled 8m11s (x4 over 8m45s) kubelet container image "registry.aliyuncs.com/google_containers/nginx-ingress-controller:v1.1.2@sha256:dcbc1b017e63a50ef369c4827d2d92334dce13ca0966712de45a8661ba97bc32" already present on machine # kubectl logs -f ingress-nginx-controller-55bc668cd8-fbrjn -n ingress-nginx standard_init_linux.go:228: exec user process caused: exec format error
报错原因：镜像版本和环境版本不匹配，使用的阿里云的镜像，但是架构不一样，更换镜像为上面第二步中的镜像
3、更换镜像之后再次部署时，ingress-nginx-controller报错如下
# kubectl logs -f -n ingress-nginx ingress-nginx-controller-6b w0418 07:38:49.717651 1 client_config.go:615] neither --kubeconfig nor --master was specified. using the inclusterconfig. this might not work. i0418 07:38:49.717901 1 main.go:223] "creating api client" host="https://10.20.0.1:443"
这次的报错同ingress-nginx-admission-create报错，在ingress-nginx-controller的deployment中spec.template.spec中添加如下hostnetwork: true
修改完成后，重新部署即可
总结
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