k8s 1.23.0 安装使用ingress 1.1.1

1、部署ingress controller下载yaml文件，要指定版本

wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.1.1/deploy/static/provider/cloud/deploy.yaml

2、修改配置文件中的镜像下载地址，总共3处修改

          image: registry.cn-hangzhou.aliyuncs.com/google_containers/nginx-ingress-controller:v1.1.1
          imagePullPolicy: IfNotPresent
          image: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-webhook-certgen:v1.1.1
          imagePullPolicy: IfNotPresent
          image: registry.cn-hangzhou.aliyuncs.com/google_containers/kube-webhook-certgen:v1.1.1
          imagePullPolicy: IfNotPresent

 3、将deploy配置文件修改type为NodePort，如果不修改在查看svc时，会看到type字段显示为LoadBalancer

4、配置文件修改完成后，直接apply就可以，镜像会自动拉取

kubectl apply -f deploy.yaml

 5、采用nodePort的方式进行暴露，编写service-nodeport.yaml，然后apply

apiVersion: v1
kind: Service
metadata:
  name: ingress-nginx
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    #app.kubernetes.io/part-of: ingress-nginx
spec:
  type: NodePort
  ports:
    - name: http
      port: 80
      targetPort: 80
      protocol: TCP
      nodePort: 80
    - name: https
      port: 443
      targetPort: 443
      protocol: TCP
  selector:
    app.kubernetes.io/name: ingress-nginx
    #app.kubernetes.io/part-of: ingress-nginx

6、查看service-nodeport.yaml生成的ingress-nginx对应的pod

 7、创建nginx和tomcat的pod，编写nginx-tomcat-deployment.yaml，然后apply

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment
  namespace: ingress-nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx-pod
  template:
    metadata:
      labels:
        app: nginx-pod
    spec:
      containers:
        - name: nginx-container
          image: nginx:latest
          ports:
            - name: nginx-port
              containerPort: 80
              protocol: TCP

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deployment
  namespace: ingress-nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: tomcat-pod
  template:
    metadata:
      labels:
        app: tomcat-pod
    spec:
      containers:
        - name: tomcat-container
          image: tomcat:8.5-jre10-slim
          ports:
            - name: tomcat-port
              containerPort: 8080
              protocol: TCP

8、创建nginx和tomcat的service，编写nginx-tomcat-service.yaml，然后apply

apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  namespace: ingress-nginx
spec:
  selector:
    app: nginx-pod
  type: ClusterIP
  ports:
    - protocol: TCP
      port: 80
      targetPort: 80

---


apiVersion: v1
kind: Service
metadata:
  name: tomcat-service
  namespace: ingress-nginx
spec:
  selector:
    app: tomcat-pod
  type: ClusterIP
  ports:
    - protocol: TCP
      port: 8080
      targetPort: 8080

9、上述pod跟svc创建完成后，再创建对应的ingress，ingress要在svc创建完成后再创建

vim ingress-http.yaml

annotations:
    kubernetes.io/ingress.class: "nginx"

注意：如果不加这一条，在外网访问的时候，可能出现404

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-http
  namespace: ingress-nginx
  annotations:
    kubernetes.io/ingress.class: "nginx"
spec:
  rules:
    - host: nginx.bulut.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: nginx-service
                port:
                  number: 80
    - host: tomcat.bulut.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: tomcat-service
                port:
                  number: 8080

kubectl apply -f ingress.yaml

10、在win10主机添加hosts记录，192.168.18.11是k8s的master

192.168.18.11 nginx.bulut.com
192.168.18.11 tomcat.bulut.com

11、在浏览器分别访问http://nginx.bulut.com、http://tomcat.bulut.com可以看到