Need assistance to submit job using external DNS

1

The virtual service created:


apiVersion: networking.istio.io/v1beta1
kind: VirtualService
metadata:
  name: ray-head-virtual-service
  namespace: kuberay
spec:
  hosts:
    - ray-jobs.example.com
  gateways:
    - istio-system/ingressgateway
  http:
    - route:
        - destination:
            host: kuberay-head-svc.kuberay.svc.cluster.local
            port:
              number: 8265
---
apiVersion: networking.istio.io/v1beta1
kind: Gateway
metadata:
  name: ray-head-gateway
  namespace: kuberay
spec:
  selector:
    istio: ingressgateway
  servers:
    - port:
        number: 80
        name: http
        protocol: HTTP
      hosts:
        - "ray-jobs.example.com"
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: ray-head-ingress
  namespace: kuberay
spec:
  rules:
    - host: ray-jobs.example.com
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: istio-ingressgateway
                port:
                  number: 80


After understood properly the JobSubmissionClient approach, I have generated the above virtual service, but the external dns is not connecting. but, I have tried with internal svc its working.

import ray
from ray.job_submission import JobSubmissionClient
import time

ray_head_ip = "kuberay-head-svc.kuberay.svc.cluster.local"
ray_head_port = 8265
ray_address = f"http://{ray_head_ip}:{ray_head_port}"