11-microservice-virtual-service-with-dark-release.yaml

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: microservice-virtual-service
  namespace: traffic-management
spec:
  hosts:
    - traffic-management.retailvoice.xyz #allowed host
  gateways:
    - traffic-management/ingressgateway # list of gateway from which we will be getting request forwarded
  http:
    - name: user-http-route
      match:
        - headers: # added header condition along with uri matching
            mode:
              exact: dev
          uri:
            prefix: "/user" # if url starts with /user like http://microservice.retailvoice.xyz/user will be directed here
      rewrite:
        uri: "/"
      route:
        - destination:
            host: user-service.traffic-management.svc.cluster.local
            subset: version2 # subset version
    - match:
        - uri:
            prefix: "/user"
      rewrite:
        uri: "/"
      route:
        - destination:
            host: user-service.traffic-management.svc.cluster.local
            subset: version1 #subset version
    - name: product-http-route
      route:
        - destination:
            host: product-service.traffic-management.svc.cluster.local
            port:
              number: 8000
      match:
        - uri:
            prefix: "/product" # if url starts with /user like http://microservice.retailvoice.xyz/user will be directed here
      rewrite:
        uri: "/"