chore(api): adjust monkey patching in gunicorn.conf.py (#26056)

This commit is contained in:
QuantumGhost
2025-09-22 18:23:01 +08:00
committed by GitHub
parent 75a10c276c
commit 1e3df09fc6
2 changed files with 27 additions and 14 deletions

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@@ -1,20 +1,11 @@
import logging
import psycogreen.gevent as pscycogreen_gevent # type: ignore
from grpc.experimental import gevent as grpc_gevent # type: ignore
_logger = logging.getLogger(__name__)
def _log(message: str):
_logger.debug(message)
# grpc gevent
grpc_gevent.init_gevent()
_log("gRPC patched with gevent.")
print("gRPC patched with gevent.", flush=True) # noqa: T201
pscycogreen_gevent.patch_psycopg()
_log("psycopg2 patched with gevent.")
print("psycopg2 patched with gevent.", flush=True) # noqa: T201
from app import app, celery

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@@ -1,10 +1,32 @@
import psycogreen.gevent as pscycogreen_gevent # type: ignore
from gevent import events as gevent_events
from grpc.experimental import gevent as grpc_gevent # type: ignore
# NOTE(QuantumGhost): here we cannot use post_fork to patch gRPC, as
# grpc_gevent.init_gevent must be called after patching stdlib.
# Gunicorn calls `post_init` before applying monkey patch.
# Use `post_init` to setup gRPC gevent support would cause deadlock and
# some other weird issues.
#
# ref:
# - https://github.com/grpc/grpc/blob/62533ea13879d6ee95c6fda11ec0826ca822c9dd/src/python/grpcio/grpc/experimental/gevent.py
# - https://github.com/gevent/gevent/issues/2060#issuecomment-3016768668
# - https://github.com/benoitc/gunicorn/blob/master/gunicorn/arbiter.py#L607-L613
def post_fork(server, worker):
def post_patch(event):
# this function is only called for gevent worker.
# from gevent docs (https://www.gevent.org/api/gevent.monkey.html):
# You can also subscribe to the events to provide additional patching beyond what gevent distributes, either for
# additional standard library modules, or for third-party packages. The suggested time to do this patching is in
# the subscriber for gevent.events.GeventDidPatchBuiltinModulesEvent.
if not isinstance(event, gevent_events.GeventDidPatchBuiltinModulesEvent):
return
# grpc gevent
grpc_gevent.init_gevent()
server.log.info("gRPC patched with gevent.")
print("gRPC patched with gevent.", flush=True) # noqa: T201
pscycogreen_gevent.patch_psycopg()
server.log.info("psycopg2 patched with gevent.")
print("psycopg2 patched with gevent.", flush=True) # noqa: T201
gevent_events.subscribers.append(post_patch)