// WaitDNSName is an implementation that the providers can use. It builds on
// the provider's implementation of Instance.DNSName.
func WaitDNSName(inst instance.Instance) (string, error) {
for a := LongAttempt.Start(); a.Next(); {
name, err := inst.DNSName()
if err == nil || err != instance.ErrNoDNSName {
return name, err
}
}
return "", fmt.Errorf("timed out trying to get DNS address for %v", inst.Id())
}
