[router][grpc] Add serve_grpc to launch_server and log id for HealthCheck (#11564)

python/sglang/srt/server_args.py

@@ -194,6 +194,7 @@ class ServerArgs:
     # HTTP server
     host: str = "127.0.0.1"
     port: int = 30000
+    grpc_mode: bool = False
     skip_server_warmup: bool = False
     warmups: Optional[str] = None
     nccl_port: Optional[int] = None
@@ -1516,6 +1517,11 @@ class ServerArgs:
             default=ServerArgs.port,
             help="The port of the HTTP server.",
         )
+        parser.add_argument(
+            "--grpc-mode",
+            action="store_true",
+            help="If set, use gRPC server instead of HTTP server.",
+        )
         parser.add_argument(
             "--skip-server-warmup",
             action="store_true",