[Bugfix] Use host argument to bind to interface (#9798)

vllm/entrypoints/openai/api_server.py

@@ -541,7 +541,7 @@ async def run_server(args, **uvicorn_kwargs) -> None:
     # This avoids race conditions with ray.
     # see https://github.com/vllm-project/vllm/issues/8204
     sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-    sock.bind(("", args.port))
+    sock.bind((args.host, args.port))
 
     def signal_handler(*_) -> None:
         # Interrupt server on sigterm while initializing

vllm/entrypoints/openai/cli_args.py

@@ -77,7 +77,7 @@ class PromptAdapterParserAction(argparse.Action):
 def make_arg_parser(parser: FlexibleArgumentParser) -> FlexibleArgumentParser:
     parser.add_argument("--host",
                         type=nullable_str,
-                        default=None,
+                        default="0.0.0.0",
                         help="host name")
     parser.add_argument("--port", type=int, default=8000, help="port number")
     parser.add_argument(