name-service needs to support headless svc

[macX-1]

FEATURE REQUEST

1. Please describe the feature you are requesting.
   name-service needs to support headless svc, and internal access is inconvenient.
2. Provide any additional detail on your proposed use case for this feature.
   If necessary, specify a cluster address similar to the following when connecting:

name-service-0.name-service-headless:9876;name-service-1.name-service-headless:9876;name-service-2.name-service-headless:9876