gistfile1.txt

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: virtual-service-guestbook
spec:
  hosts:
    - '*'
  gateways:
    - guestbook-gateway
  http:
  - match:
    - headers:
        cookie:
          user: qa
    route:
    - destination:
        port:
          number: 7777
        host: guestbook.qa.svc.cluster.local
  - match:
      uri:
        prefix: /reviews/
    route:
    - destination:
        port:
          number: 9080
        host: reviews.prod.svc.cluster.local
      weight: 80
    - destination:
        host: reviews.qa.svc.cluster.local
      weight: 20