Istio virtualservice匹配cookie

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apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: nginx-vs
  namespace: istio-demo
spec:
  exportTo:
  - '*'
  hosts:
  - nginx-svc
  http:
  - match:
    - headers:
        Cookie:
          regex: ^(.*?; )?(user=soulchild)(;.*)?$
    route:
    - destination:
        host: nginx-svc
        subset: v2
  - route:
    - destination:
        host: nginx-svc
        subset: v1