source/compatibility.go
func legacyEndpointsFromMoleculeService(svc *v1.Service) []*endpoint.Endpoint {
	var endpoints []*endpoint.Endpoint

	// Check that the Service opted-in to being processed.
	if svc.Labels["dns"] != "route53" {
		return nil
	}

	// Get the desired hostname of the service from the annotation.
	hostnameAnnotation, exists := svc.Annotations[moleculeAnnotationKey]
	if !exists {
		return nil
	}

	hostnameList := strings.Split(strings.Replace(hostnameAnnotation, " ", "", -1), ",")

	for _, hostname := range hostnameList {
		// Create a corresponding endpoint for each configured external entrypoint.
		for _, lb := range svc.Status.LoadBalancer.Ingress {
			if lb.IP != "" {
				endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeA, lb.IP))
			}
			if lb.Hostname != "" {
				endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeCNAME, lb.Hostname))
			}
		}
	}

	return endpoints
}
func legacyEndpointsFromMoleculeService(svc *v1.Service) []*endpoint.Endpoint {
	var endpoints []*endpoint.Endpoint

	// Check that the Service opted-in to being processed.
	if svc.Labels["dns"] != "route53" {
		return nil
	}

	// Get the desired hostname of the service from the annotation.
	hostnameAnnotation, exists := svc.Annotations[moleculeAnnotationKey]
	if !exists {
		return nil
	}

	hostnameList := strings.Split(strings.Replace(hostnameAnnotation, " ", "", -1), ",")

	for _, hostname := range hostnameList {
		// Create a corresponding endpoint for each configured external entrypoint.
		for _, lb := range svc.Status.LoadBalancer.Ingress {
			if lb.IP != "" {
				endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeA, lb.IP))
			}
			if lb.Hostname != "" {
				endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeCNAME, lb.Hostname))
			}
		}
	}

	return endpoints
}
// legacyEndpointsFromMoleculeService tries to retrieve Endpoints from Services
// annotated with Molecule Software's annotation semantics.