istio-in-gw.yaml

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  # this is name we use to connect from VirtualServices.
  name: istio-in-gw
  namespace: istio
spec:
  selector:
    # this is to connect the Service created. "Instio Ingress Service"
    # this should match to connect the Service to gatway.
    app: istio-ingress
  servers:
  # configure the ports as needed. Example http is given,
  # this is the `targetPort` configured in "istio-ingress" Service.
  - port:
      number: 80
      name: http
      protocol: HTTP
    # we can whitelist the hostnames or domains that is allowed thorugh the Gateway
    hosts:
      - "sub1.example.ca"
      - "sub2.example.ca"
      - "sub2.example.ca"