一、问题描述

Django中，anconda环境下安装uwsgi，启动遇到的问题：

按照正常的启动方式启动：

uwsgi --ini uwsgi_py.ini

但是报错：

Traceback (most recent call last):
  File "/opt/myproject/myproject/wsgi.py", line 12, in <module>
    from django.core.wsgi import get_wsgi_application
  File "/root/anaconda3/envs/xxx/lib/python3.11/site-packages/django/__init__.py", line 1, in <module>
    from django.utils.version import get_version
  File "/root/anaconda3/envs/xxx/lib/python3.11/site-packages/django/utils/version.py", line 1, in <module>
    import datetime
  File "/root/anaconda3/envs/xxx/lib/python3.11/datetime.py", line 12, in <module>
    import math as _math
ImportError: /root/anaconda3/envs/lottery/lib/python3.11/lib-dynload/math.cpython-311-x86_64-linux-gnu.so: undefined symbol: _PyModule_Add
unable to load app 0 (mountpoint='') (callable not found or import error)
*** no app loaded. going in full dynamic mode ***
uWSGI running as root, you can use --uid/--gid/--chroot options
*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***
*** uWSGI is running in multiple interpreter mode ***
spawned uWSGI master process (pid: 43924)
spawned uWSGI worker 1 (pid: 43925, cores: 1)
spawned uWSGI worker 2 (pid: 43926, cores: 1)
spawned uWSGI worker 3 (pid: 43927, cores: 1)
spawned uWSGI http 1 (pid: 43928)
--- no python application found, check your startup logs for errors ---
--- no python application found, check your startup logs for errors ---
--- no python application found, check your startup logs for errors ---
--- no python application found, check your startup logs for errors ---

二、分析原因

uwsgi没有起来

三、解决办法：

不管怎么改配置都报这个错，网上很多解答，但是没有成功的。

这个问题的关键是：在anaconda 环境下安装uwsgi

pip install uwsgi

这个不行的，安装成功，但是anaconda环境下使用就会出这个问题。

所以要在anaconda下使用uwsgi，请按照下面的方式去安装：

anaconda search -t conda uwsgi

anaconda show conda-forge/uwsgi

conda install --channel https://conda.anaconda.org/conda-forge uwsgi 

用conda安装uwsgi就可以了。这个应该和conda的环境有关系。

四、附加：

如果还出现问题，估计python版本与uwsgi不兼容，解决办法如下：

1、anconda环境下新建环境：

conda create -n ps39 python=3.9

2、进入指定的环境

conda activate ps39

3、重新运行代码

uwsgi --ini uwsgi_py.ini

4、查看日志，程序运行正常

*** Starting uWSGI 2.0.21 (64bit) on [Wed Sep 25 08:38:32 2024] ***
compiled with version: 11.2.0 on 05 August 2024 19:30:51
os: Linux-5.4.0-196-generic #216-Ubuntu SMP Thu Aug 29 13:26:53 UTC 2024
nodename: python
machine: x86_64
clock source: unix
pcre jit disabled
detected number of CPU cores: 16
current working directory: /root/app/text_detection/script
writing pidfile to /root/app/text_detection/script/pid_uwsgi.pid
detected binary path: /opt/anaconda/install/envs/ps39/bin/uwsgi
uWSGI running as root, you can use --uid/--gid/--chroot options
*** WARNING: you are running uWSGI as root !!! (use the --uid flag) *** 
chdir() to /root/app/text_detection
your processes number limit is 128219
your memory page size is 4096 bytes
detected max file descriptor number: 1024
lock engine: pthread robust mutexes
thunder lock: disabled (you can enable it with --thunder-lock)
uwsgi socket 0 bound to TCP address 172.16.13.157:8010 fd 3
uWSGI running as root, you can use --uid/--gid/--chroot options
*** WARNING: you are running uWSGI as root !!! (use the --uid flag) *** 
Python version: 3.9.19 (main, May  6 2024, 19:43:03)  [GCC 11.2.0]
Python main interpreter initialized at 0xfff4f0
uWSGI running as root, you can use --uid/--gid/--chroot options
*** WARNING: you are running uWSGI as root !!! (use the --uid flag) *** 
python threads support enabled
your server socket listen backlog is limited to 100 connections
your mercy for graceful operations on workers is 60 seconds
mapped 403077 bytes (393 KB) for 2 cores
*** Operational MODE: preforking ***
WSGI app 0 (mountpoint='') ready in 1 seconds on interpreter 0xfff4f0 pid: 868081 (default app)
uWSGI running as root, you can use --uid/--gid/--chroot options
*** WARNING: you are running uWSGI as root !!! (use the --uid flag) *** 
*** uWSGI is running in multiple interpreter mode ***
spawned uWSGI master process (pid: 868081)
spawned uWSGI worker 1 (pid: 868082, cores: 1)
spawned uWSGI worker 2 (pid: 868083, cores: 1)