Align Gunicorn configuration with Uvicorn

- centralize config in gunicorn_config.py
- fix log level handling in Gunicorn

lightrag/api/lightrag_server.py

@@ -86,7 +86,7 @@ class LightragPathFilter(logging.Filter):
 
 def create_app(args):
     # Setup logging
-    logger.setLevel(getattr(logging, args.log_level))
+    logger.setLevel(args.log_level)
     set_verbose_debug(args.verbose)
 
     # Verify that bindings are correctly setup
@@ -412,17 +412,10 @@ def create_app(args):
     return app
 
 
-def get_application():
+def get_application(args=None):
     """Factory function for creating the FastAPI application"""
-    # Get args from environment variable
-    args_json = os.environ.get("LIGHTRAG_ARGS")
-    if not args_json:
-        args = parse_args()  # Fallback to parsing args if env var not set
-    else:
-        import types
-
-        args = types.SimpleNamespace(**json.loads(args_json))
-
+    if args is None:
+        args = parse_args()
     return create_app(args)
 
 
@@ -513,10 +506,7 @@ def main():
     # Configure logging before parsing args
     configure_logging()
 
-    args = parse_args()
-    # Save args to environment variable for child processes
-    os.environ["LIGHTRAG_ARGS"] = json.dumps(vars(args))
-
+    args = parse_args(is_uvicorn_mode=True)
     display_splash_screen(args)
 
     # Create application instance directly instead of using factory function

lightrag/api/utils_api.py

@@ -111,10 +111,13 @@ def get_env_value(env_key: str, default: any, value_type: type = str) -> any:
         return default
 
 
-def parse_args() -> argparse.Namespace:
+def parse_args(is_uvicorn_mode: bool = False) -> argparse.Namespace:
     """
     Parse command line arguments with environment variable fallback
 
+    Args:
+        is_uvicorn_mode: Whether running under uvicorn mode
+
     Returns:
         argparse.Namespace: Parsed arguments
     """
@@ -287,9 +290,6 @@ def parse_args() -> argparse.Namespace:
 
     args = parser.parse_args()
 
-    # Check if running under uvicorn mode (not Gunicorn)
-    is_uvicorn_mode = "GUNICORN_CMD_ARGS" not in os.environ
-    
     # If in uvicorn mode and workers > 1, force it to 1 and log warning
     if is_uvicorn_mode and args.workers > 1:
         original_workers = args.workers