k8s网页访问实战

流程：

客户端访问--->ingress七层代理---->service四层代理---->deployment

详细情况：https://www.cnblogs.com/yangmeichong/p/17664552.html

1.Ingress七层代理

   ---可在其基础上添加灰度发布

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ingress-myapp
  namespace: default
  # 注解:可能其它版本不能用,1.25版本换方法
  #annotations:
    # 将创建的ingress规则交给ingress-nginx-controller这2个pod
  #  kubernetes.io/ingress.class: "nginx"
spec:
  # 代替上面的注解
  ingressClassName: nginx
  rules:
  - host: tomcat.lucky.com
    http:
      paths:
      - backend:
          service:
            name: tomcat
            port:
              number: 8080
        path: /
        pathType: Prefix

2.service四层代理

apiVersion: v1
kind: Service
metadata:
  name: tomcat
  namespace: default
spec:
  selector:
    app: tomcat
    release: canary
  ports:
  - name: http
    targetPort: 8080
    port: 8080
  - name: ajp
    targetPort: 8009
    port: 8009

3.deployment控制器

apiVersion: apps/v1
kind: Deployment
metadata:
  name: tomcat-deploy
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: tomcat
      release: canary
  template:
    metadata:
      labels:
        app: tomcat
        release: canary
    spec:
      containers:
      - name: tomcat
        image: tomcat:8.5.34-jre8-alpine
        imagePullPolicy: IfNotPresent
        ports:
        - name: http
          containerPort: 8080
          name: ajp
          containerPort: 8009