如何从 gunicorn 的 pre_fork 挂钩访问我的应用程序？

Question

我将 CherryPy 与 gunicorn 一起使用，我需要让我的应用程序实例运行它的 init 在主线程 pre-fork 和运行上一些其他方法 post-fork（假设我有充分的理由 - 正如我所做的那样）。我可以安装一个 post_fork 挂钩，但我看不到如何到达我的应用程序实例来调用该方法。

import logging

bind = '0.0.0.0:80'
workers = 3
preload_app = True
logconfig = 'logging.conf'


def post_fork(server, worker):
    logging.info('server:%s worker:%s', server, worker) 
    # How to I reach #2 in server.Server.start?   <-------- #1

import logging

import cherrypy


class Server:
    def __init__(self):
        # I need to run pre-fork
        logging.info('init')

    def start(self):
        # I need to be called post-fork  <-------- #2
        logging.info('start')

    @cherrypy.expose
    def test(self):
        return "ok"


application = cherrypy.Application(Server(), config={"global": {"environment": "embedded"}}

$ gunicorn -c config.py server:application
2019-08-14 00:42:26,033:22541:MainThread:INFO: init
2019-08-14 00:42:26,033:22541:MainThread:INFO: Starting gunicorn 19.9.0
2019-08-14 00:42:26,033:22541:MainThread:INFO: Listening at: http://0.0.0.0:80 (22541)
2019-08-14 00:42:26,033:22541:MainThread:INFO: Using worker: sync
2019-08-14 00:42:26,038:22544:MainThread:INFO: Booting worker with pid: 22544
2019-08-14 00:42:26,040:22544:MainThread:INFO: server:<gunicorn.arbiter.Arbiter object at 0x108f8efd0> worker:<Worker 22544>
2019-08-14 00:42:26,131:22545:MainThread:INFO: Booting worker with pid: 22545
2019-08-14 00:42:26,133:22545:MainThread:INFO: server:<gunicorn.arbiter.Arbiter object at 0x108f8efd0> worker:<Worker 22545>
2019-08-14 00:42:26,156:22546:MainThread:INFO: Booting worker with pid: 22546
2019-08-14 00:42:26,157:22546:MainThread:INFO: server:<gunicorn.arbiter.Arbiter object at 0x108f8efd0> worker:<Worker 22546>

Answer 1

玩了一会儿，我找到了答案：

def post_fork(server, worker):
    worker.app.callable.root.start()

如何从 gunicorn 的 pre_fork 挂钩访问我的应用程序？

How do I reach my application from gunicorn's pre_fork hook?

python

cherrypy

gunicorn