f879b10b05
With the events of eventlet removal, Watcher will need to be adapted to support both modes, eventlet and threading, for a couple of releases before removing all eventlet code. This patch adds methods and classes that allow decision engine modules to create futurist thread pools instead of green thread pools, based on a environment variable that can be enabled by service. It moves continuous audit handler instance to decison engine service, so it can be started together with the main decision engine service. Adds an environment variable that allows the user to disable eventlet monkey patching and to use oslo.service threading backend. Change-Id: I8a8be0a7cebdc44005fd77ec960543828c7da318 Signed-off-by: Douglas Viroel <viroel@gmail.com>
37 lines
1.8 KiB
Python
37 lines
1.8 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# NOTE(licanwei): Do eventlet monkey patching here, instead of in
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# common/service.py. This allows the API service to run without monkey
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# patching under Apache (which uses its own concurrency model). Mixing
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# concurrency models can cause undefined behavior and potentially API timeouts.
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# NOTE(sean-k-mooney) while ^ is true, since that was written asyncio was added
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# to the code base in addition to apscheduler which provides native threads.
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# As such we have a lot of technical debt to fix with regards to watchers
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# concurrency model as we are mixing up to 3 models the same process.
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# apscheduler does not technically support eventlet but it has mostly worked
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# until now, apscheduler is used to provide a job schedulers which mixes
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# monkey patched and non monkey patched code in the same process.
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# That is problematic and can lead to errors on python 3.12+.
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# The maas support added asyncio to the codebase which is unsafe to mix
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# with eventlets by default.
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from watcher.common import oslo_service_helper as helper
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from watcher import eventlet
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eventlet.patch()
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# NOTE(dviroel): oslo service backend needs to be initialize
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# as soon as possible, before importing oslo service. If eventlet
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# patching is enabled, it should be patched before calling this
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# function
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helper.init_oslo_service_backend()
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