使用helm安装ingress，实现用域名的方式访问k8s内部应用

k8s集群版本

k8s集群版本是1.22

提前部署好nginx服务和创建好svc

deployment方式部署的nginx服务，1个副本

创建的服务

通过服务可以代理到nginx服务

curl 10.105.183.50:801

安装helm管理工具

https://helm.sh/docs/intro/install/

tar -zxvf helm-v3.6.3-linux-amd64.tar.gz

mv linux-amd64/helm /usr/local/bin/helm

helm version

添加ingress的helm仓库

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx

helm repo list

另外，如果要移除，helm repo remove ingress-nginx

搜索ingress-nginx

helm search repo ingress-nginx

下载

helm pull ingress-nginx/ingress-nginx --version 4.0.6

解压、配置

tar xf ingress-nginx-4.0.1.tgz

cd ingress-nginx

vim values.yaml

配置文件已经放到网盘

部署ingress-nginx-controller

创建命名空间：kubectl create ns ingress-nginx

安装到node1，给node1打标签：kubectl label node k8s-node01 ingress=true

安装：helm install ingress-nginx -n ingress-nginx .

（卸载：helm uninstall ingress-nginx -n ingress-nginx）

NAME: ingress-nginx
LAST DEPLOYED: Sun Dec 12 20:01:46 2021
NAMESPACE: ingress-nginx
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
The ingress-nginx controller has been installed.
Get the application URL by running these commands:
  export POD_NAME=$(kubectl --namespace ingress-nginx get pods -o jsonpath="{.items[0].metadata.name}" -l "app=ingress-nginx,component=controller,release=ingress-nginx")
  kubectl --namespace ingress-nginx port-forward $POD_NAME 8080:80
  echo "Visit http://127.0.0.1:8080 to access your application."

An example Ingress that makes use of the controller:

  apiVersion: networking.k8s.io/v1
  kind: Ingress
  metadata:
    annotations:
      kubernetes.io/ingress.class: nginx
    name: example
    namespace: foo
  spec:
    ingressClassName: example-class
    rules:
      - host: www.example.com
        http:
          paths:
            - path: /
              pathType: Prefix
              backend:
                service:
                  name: exampleService
                  port: 80
    # This section is only required if TLS is to be enabled for the Ingress
    tls:
      - hosts:
        - www.example.com
        secretName: example-tls

If TLS is enabled for the Ingress, a Secret containing the certificate and key must also be provided:

  apiVersion: v1
  kind: Secret
  metadata:
    name: example-tls
    namespace: foo
  data:
    tls.crt: <base64 encoded cert>
    tls.key: <base64 encoded key>
  type: kubernetes.io/tls

查看：kubectl get po -n ingress-nginx

服务

ps -ef |grep ingress

netstat -lntp | grep 80

创建ingress

使用v1版本

vim ingress-v1.yaml

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: test-ingress
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
  - host: www.baidu2.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: nginx-svc
            port:
              number: 801

kubectl create -f ingress-v1.yaml

kubectl get ingress

通过ingress暴露的域名访问

由于没有域名，这里只是简单模拟，

修改host文件：C:\Windows\System32\drivers\etc\hosts

最后一行添加：192.168.117.145 www.baidu2.com

请求域名，先从本地hosts文件找

访问首页

查看容器

进入到容器，添加一个页面

不加路径，默认就是访问的index.html

访问添加的页面

至此，可以通过ingress把请求代理到svc，svc代理到pod。