[Rust] Gate health on startup warmup completion (#37994)

python/sglang/srt/entrypoints/http_server.py

@@ -2205,6 +2205,10 @@ def _execute_server_warmup(server_args: ServerArgs):
     url = server_args.url()
     if get_serving().api_key:
         headers["Authorization"] = f"Bearer {get_serving().api_key}"
+    if envs.SGLANG_RUST_SERVER.get():
+        # The Rust listener binds before this request so /model_info is
+        # available, but health stays 503 until this marked request succeeds.
+        headers["x-sglang-startup-warmup"] = "1"
 
     ssl_verify = ssl_verify_of(server_args)
 

python/sglang/srt/rust_server/config.py

@@ -62,6 +62,7 @@ def _build_server_args(scheduler: Scheduler) -> ServerArgs:
         tokenizer_worker_num=get_serving().tokenizer_worker_num,
         detokenizer_worker_num=get_serving().detokenizer_worker_num,
         skip_tokenizer_init=get_serving().skip_tokenizer_init,
+        skip_server_warmup=get_serving().skip_server_warmup,
         incremental_streaming_output=get_serving().incremental_streaming_output,
         disaggregation_mode=disaggregation_mode,
         model_config=ext.ModelConfig(