Gateway

• A gateway is necessary to apply the traffic management rules from the proxy to a frontend application
• Normally the browser access the frontend app directly via node port before the configuration in the proxy can be applied
• Edge proxy is the connection with the outside world (E.g., ingress nginx)
• In Istio, the edge proxy is the Ingress Gateway

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: ingress-gateway-configuration
spec:
  selector:
    istio: ingressgateway # use Istio default gateway implementation
  servers:
    - port:
        number: 80
        name: http
        protocol: HTTP
      hosts:
        - '*' # Domain name of the external website