使用 mod_wsgi 在 Jelastic PaaS 环境中使用 FastAPI 运行 ASGI 应用程序

Question

我想在我的Python项目中使用

FastAPI

，我想将其部署在Jelastic PaaS上。 显然

mod_wsgi

仅管理 WSGI 应用程序，因此我尝试使用

a2wsgi

在 WSGI 应用程序中运行 ASGI 应用程序，如下所示，这是我的

wsgi.py

:

import os, sys

virtenv = os.path.expanduser('~') + '/virtenv/'
virtualenv = os.path.join(virtenv, 'bin/activate_this.py')
try:
    if sys.version.split(' ')[0].split('.')[0] == '3':
        exec(compile(open(virtualenv, "rb").read(), virtualenv, 'exec'), dict(__file__=virtualenv))
    else:
        execfile(virtualenv, dict(__file__=virtualenv))
except IOError:
    pass

sys.path.append(os.path.expanduser('~'))
sys.path.append(os.path.expanduser('~') + '/ROOT/')


from fastapi import FastAPI
app = FastAPI()
@app.get("/")
def read_main():
    return {"message": "Hello World"}


from a2wsgi import ASGIMiddleware
application = ASGIMiddleware(app)

这些行已针对我的特定执行

virtenv

:

virtualenv virtenv
source virtenv/bin/activate
pip install a2wsgi
pip install fastapi
deactivate

但是仍然无法正常工作。也许我错过了一些大事。 这个错误对我来说似乎并没有“说话”（但我不是Python专家）：

mod_wsgi (pid=14438): Failed to exec Python script file '/var/www/webroot/ROOT/wsgi.py'.
mod_wsgi (pid=14438): Exception occurred processing WSGI script '/var/www/webroot/ROOT/wsgi.py'.
Traceback (most recent call last):
File "/var/www/webroot/ROOT/wsgi.py", line 24, in <module>
from fastapi import FastAPI
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/fastapi/__init__.py", line 7, in <module>
from .applications import FastAPI as FastAPI
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/fastapi/applications.py", line 16, in <module>
from fastapi import routing
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/fastapi/routing.py", line 22, in <module>
from fastapi import params
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/fastapi/params.py", line 5, in <module>
from fastapi.openapi.models import Example
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/fastapi/openapi/models.py", line 4, in <module>
from fastapi._compat import (
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/fastapi/_compat.py", line 20, in <module>
from fastapi.exceptions import RequestErrorModel
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/fastapi/exceptions.py", line 3, in <module>
from pydantic import BaseModel, create_model
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/pydantic/__init__.py", line 12, in <module>
from . import dataclasses
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/pydantic/dataclasses.py", line 11, in <module>
from ._internal import _config, _decorators, _typing_extra
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/pydantic/_internal/_decorators.py", line 15, in <module>
from ..fields import ComputedFieldInfo
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/pydantic/fields.py", line 19, in <module>
import annotated_types
File "/var/www/webroot/virtenv/lib/python3.12/site-packages/annotated_types/__init__.py", line 361, in <module>
IsNotFinite = Annotated[_NumericType, Predicate(Not(math.isfinite))]
^^^^^^^^^^^^^^^^^^
TypeError: Not() takes no arguments

完整背景：

APACHE_VERSION=2.4.57
DOCKER_EXPOSED_PORT=21,22,25,443,7979,80
MOD_WSGI_VERSION=4.9.4
OWASP_MODSECURITY_CRS_VERSION=3.3.2
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
PYTHON_VERSION=3.12.0
STACK_VERSION=2.4.57
VERSION=3.12.0
WEBROOT=/var/www/webroot
WSGI_SCRIPT=/var/www/webroot/ROOT/wsgi.py

Answer 1

我找到了一个简单的解决方案。
我降级了 jelastic

apachepython

容器：

• 来自

  2.4.57-python-3.12.0

• 到

  2.4.57-python-3.9.18

并且成功了。