traffic-control

场景三

模型图

资源清单

front-tomcat-service.yaml

apiVersion: v1
kind: Service
metadata:
  labels:
    app: front-tomcat
  name: front-tomcat
  namespace: istio-demo
spec:
  ports:
  - name: http
    port: 8080
    protocol: TCP
    targetPort: 8080
  selector:
    app: front-tomcat
  type: ClusterIP

front-tomcat-v2-dpl.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: front-tomcat
    version: v2
  name: front-tomcat-v2
  namespace: istio-demo
spec:
  replicas: 1
  selector:
    matchLabels:
      app: front-tomcat
      version: v2
  template:
    metadata:
      labels:
        app: front-tomcat
        version: v2
    spec:
      containers:
      - image: consol/tomcat-7.0:latest
        name: front-tomcat
        command: ["/bin/sh", "-c", "echo 'hello tomcat version2'\>/opt/tomcat/webapps/ROOT/index.html;/opt/tomcat/bin/deploy-and-run.sh;"]

front-tomcat-virtualservice.yaml

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: front-tomcat
  namespace: istio-demo
spec:
  hosts:
  - front-tomcat
  http:
  - name: front-tomcat-route
    route:
    - destination:
        host: front-tomcat
        subset: v1
      weight: 90
    - destination:
        host: front-tomcat
        subset: v2
      weight: 10
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: front-tomcat
  namespace: istio-demo
spec:
  host: front-tomcat
  subsets:
  - name: v1
    labels:
      version: v1
  - name: v2
    labels:
      version: v2

$ kubectl apply -f front-tomcat-service.yaml
$ kubectl apply -f \<(istioctl kube-inject -f front-tomcat-v2-dpl.yaml)
$ kubectl apply -f front-tomcat-virtualservice.yaml