frontend-virtual-service-ab-test.yaml

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: frontend-virtual-service
spec:
  hosts:
  - frontend.apps.SUBDOMAIN
  gateways:
  - control-plane/wildcard-gateway
  http:
  - match:
    - headers:
        user-agent:
          regex: (.*)Firefox(.*)
    route:
    - destination:
        host: frontend
        port:
          number: 8080
        subset: v2
  - route:
    - destination:
        host: frontend
        port:
          number: 8080
        subset: v1