I know istio is supporting route to different service by static rule as below:

---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: my-virtualservice
spec:
  hosts:
  - "*"
  gateways:
  - my-gateway
  http:
  - match:
    - uri:
        prefix: /applications/app-a
    route:
    - destination:
        host: app-a
        port:
          number: 9080

But i have the requirement that, I have dynamically created services when there is new user or new configuration is coming. If i use the "static" way, then I have to create new virtual service every time or update existing virtual service.

I don't find any documentation mentioned this kind of usage, but can i use something like "regex" or some other way to create one rule to apply to all those new created services without updating virtual service every time? Below is something not work, but try to demonstrate my idea:

---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: my-virtualservice
spec:
  hosts:
  - "*"
  gateways:
  - my-gateway
  http:
  - match:
    - uri:
        regex: /applications/(?<appname>.*)
    route:
    - destination:
        host: $('appname')--svc
        port:
          number: 9080

Of course, any suggestion would be greatly appreciated. Thanks.