URI重定向

还有另一种对目标路由的分流方式，根据URL进行重定向

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: nginx-default-v2
  namespace: lizhe
spec: 
  hosts:
  - nginx-service
  http:
  - match:
    - headers:
        ver: 
          exact: v2
    route: 
    - destination:
        host: nginx-service
        subset: v2
  - match:
    - headers:
        ver: 
          exact: v3
    redirect:
      uri: /index.html
  - route: 
    - destination: 
        host: nginx-service
        subset: v1