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1# Licensed to the Apache Software Foundation (ASF) under one 

2# or more contributor license agreements. See the NOTICE file 

3# distributed with this work for additional information 

4# regarding copyright ownership. The ASF licenses this file 

5# to you under the Apache License, Version 2.0 (the 

6# "License"); you may not use this file except in compliance 

7# with the License. You may obtain a copy of the License at 

8# 

9# http://www.apache.org/licenses/LICENSE-2.0 

10# 

11# Unless required by applicable law or agreed to in writing, 

12# software distributed under the License is distributed on an 

13# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 

14# KIND, either express or implied. See the License for the 

15# specific language governing permissions and limitations 

16# under the License. 

17""" 

18Gunicorn configuration hooks for the Airflow API server. 

19 

20This module provides Gunicorn server hooks that are loaded via the -c config option. 

21These hooks handle: 

22- Setting process titles to indicate worker readiness (useful for debugging) 

23- Cleaning up ORM connections on worker exit 

24 

25Usage: 

26 gunicorn -c python:airflow.api_fastapi.gunicorn_config airflow.api_fastapi.main:app 

27""" 

28 

29from __future__ import annotations 

30 

31import logging 

32import sys 

33 

34from airflow import settings 

35 

36log = logging.getLogger(__name__) 

37 

38# On macOS, setproctitle has issues, so we skip it 

39if sys.platform == "darwin": 

40 

41 def setproctitle(title): 

42 log.debug("macOS detected, skipping setproctitle") 

43else: 

44 from setproctitle import setproctitle 

45 

46 

47def post_worker_init(worker): 

48 """ 

49 Execute after a worker has been initialized. 

50 

51 This hook runs in each worker process after the ASGI app has been loaded. 

52 We set the process title with a ready prefix for debugging visibility. 

53 """ 

54 ready_prefix = settings.GUNICORN_WORKER_READY_PREFIX 

55 proc_title = f"{ready_prefix}airflow api-server worker" 

56 setproctitle(proc_title) 

57 log.info("Worker initialized and ready, set process title: %s", proc_title) 

58 

59 

60def worker_exit(server, worker): 

61 """ 

62 Execute when a worker is about to exit. 

63 

64 This hook runs in the worker process itself (not the arbiter) just before exit. 

65 We clean up ORM connections to ensure proper resource cleanup. 

66 """ 

67 log.debug("Worker %s exited, disposing ORM connections", worker.pid) 

68 settings.dispose_orm(do_log=False)