[Bugfix] Add log prefix in non-dp mode engine core (#21889)

Signed-off-by: wuhang <wuhang6@huawei.com>

vllm/entrypoints/openai/api_server.py

@@ -11,7 +11,6 @@ import multiprocessing
 import os
 import signal
 import socket
-import sys
 import tempfile
 import uuid
 from argparse import Namespace
@@ -95,15 +94,15 @@ from vllm.entrypoints.openai.serving_transcription import (
 from vllm.entrypoints.openai.tool_parsers import ToolParserManager
 from vllm.entrypoints.utils import (cli_env_setup, load_aware_call,
                                     log_non_default_args, with_cancellation)
-from vllm.executor.multiproc_worker_utils import _add_prefix
 from vllm.logger import init_logger
 from vllm.reasoning import ReasoningParserManager
 from vllm.transformers_utils.config import (
     maybe_register_config_serialize_by_value)
 from vllm.transformers_utils.tokenizer import MistralTokenizer
 from vllm.usage.usage_lib import UsageContext
-from vllm.utils import (Device, FlexibleArgumentParser, get_open_zmq_ipc_path,
-                        is_valid_ipv6_address, set_process_title, set_ulimit)
+from vllm.utils import (Device, FlexibleArgumentParser, decorate_logs,
+                        get_open_zmq_ipc_path, is_valid_ipv6_address,
+                        set_process_title, set_ulimit)
 from vllm.v1.metrics.prometheus import get_prometheus_registry
 from vllm.version import __version__ as VLLM_VERSION
 
@@ -1808,10 +1807,7 @@ async def run_server(args, **uvicorn_kwargs) -> None:
     """Run a single-worker API server."""
 
     # Add process-specific prefix to stdout and stderr.
-    process_name = "APIServer"
-    pid = os.getpid()
-    _add_prefix(sys.stdout, process_name, pid)
-    _add_prefix(sys.stderr, process_name, pid)
+    decorate_logs("APIServer")
 
     listen_address, sock = setup_server(args)
     await run_server_worker(listen_address, sock, args, **uvicorn_kwargs)