[英]Python3 threading with uWSGI
I wasted many time but couldn't find a solution.我浪费了很多时间,但找不到解决方案。
If i use threads in my app deployed with uwsgi, they aren't sync.如果我在使用 uwsgi 部署的应用程序中使用线程,它们不会同步。
Here simple code for an example(wsgi.py):这是示例的简单代码(wsgi.py):
from time import sleep
import threading
i = 0
def daemon():
global i
while True:
i += 1
print(i)
sleep(3)
th = threading.Thread(target=daemon, args=())
th.start()
def application(environ, start_response):
start_response('200 OK', [('Content-Type','text/html')])
return [str(i).encode()]
And when I run this app the i
increases in log, but I always get 1
when a make request from browser.(Or get 0
if I move sleep(3)
before i
first increment)当我运行这个程序中
i
增加日志,但我总能得到1
时,从浏览器中的化妆请求。(或者得到0
,如果我动sleep(3)
之前, i
先增量)
I tried uwsgi.thread decorator, but got the same result.我尝试了 uwsgi.thread 装饰器,但得到了相同的结果。
uwsgi config: uwsgi 配置:
[uwsgi]
socket = 127.0.0.1:3034
plugins-dir = /srv/uwsgi
plugin = python34
uid = py3utils
gid = py3utils
chdir = /srv/python/3/py3utils/tht/app/
wsgi-file = wsgi.py
enable-threads = true
daemonize = %(chdir)/../uwsgi.log
master = true
die-on-term = true
touch-reload = ../uwsgi_restart.txt
*sorry for my English *对不起我的英语不好
This happens because after importing your application the master process forks into a worker:发生这种情况是因为在导入您的应用程序后,主进程分叉到一个工作进程中:
spawned uWSGI master process (pid: 7167)
spawned uWSGI worker 1 (pid: 7169, cores: 1)
spawned uWSGI http 1 (pid: 7170)
So your thread which prints i
is running in master process, and your requests are processed by the worker.所以你打印
i
的线程正在主进程中运行,你的请求由工作人员处理。 The worker during the fork sees i
equal to 1. If you move sleep
before incrementing i
the process manages to fork before the first increment.分叉期间的工作人员看到
i
等于 1。如果您在增加i
之前移动sleep
进程设法在第一个增量之前分叉。
Threads except the main one are not copied during a fork, so i
does not increment in the worker.在分叉期间不会复制除主线程之外的线程,因此
i
不会在工作线程中增加。
You should use something like uwsgidecorators.thread
:你应该使用类似
uwsgidecorators.thread
东西:
from time import sleep
import threading
import uwsgidecorators
i = 0
@uwsgidecorators.postfork
@uwsgidecorators.thread
def daemon():
global i
while True:
i += 1
print(i)
sleep(3)
def application(environ, start_response):
start_response('200 OK', [('Content-Type','text/html')])
return [str(i).encode()]
Or use:或使用:
[uwsgi]
master = false
Python threading is disabled by default in uwsgi, you can enable it by adding option --enable-threads
: Python 线程在 uwsgi 中默认是禁用的,您可以通过添加选项
--enable-threads
来启用它:
uwsgi --http :8090 --wsgi-file uwsgi_test.py --enable-threads
It works in my test environment.它适用于我的测试环境。
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