ingress.yaml

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: flask-gateway
spec:
  selector:
    istio: ingressgateway # use Istio default gateway implementation
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
    - "flask.example.com"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: flaskvirtualservice
spec:
  hosts:
  - "flask.example.com"
  gateways:
  - flask-gateway
  http:
  - match:
    - uri:
        prefix: /list
    - uri:
        prefix: /home
    route:
    - destination:
        port:
          number: 5000
        host: flaskfrontend.default.svc.cluster.local  # destination hosts to which traffic is being sent. The hosts field applies to both HTTP and TCP services