Openshift上的Flask框架无法加载模块

Question

所以我从 github 上的 OS quickstart 在 OS 中创建了一个烧瓶应用程序。该应用程序在我的本地系统上运行良好。当我将应用程序推送到它构建的操作系统时，我在浏览器中收到错误 500。

任何想法或帮助将不胜感激。

以下是应用程序文件的源代码：

#!/usr/bin/python import os

virtenv = os.environ['APPDIR'] + '/virtenv/'
os.environ['PYTHON_EGG_CACHE'] = os.path.join(virtenv, 'lib/python2.6/site-packages')
virtualenv = os.path.join(virtenv, 'bin/activate_this.py')
try:
    execfile(virtualenv, dict(__file__=virtualenv))
except IOError:
    pass

from run import app as application

这里是run.py文件的源码

from app import app 
app.run(debug = True)

以下是日志中的错误（删除了我网站的 HASH ID）：

[Sun Aug 05 15:46:08 2012] [error] * Running on http://127.0.0.1:5000/
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] mod_wsgi (pid=28484): Target WSGI script '/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/application' cannot be loaded as Python module. 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] mod_wsgi (pid=28484): Exception occurred processing WSGI script '/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/application'. 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] Traceback (most recent call last): 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/application", line 13, in <module> 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] from run import app as application 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/run.py", line 2, in <module> 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] app.run(debug = True) 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/ws/virtenv/lib/python2.6/site-packages/Flask-0.9-py2.6.egg/flask/app.py", line 739, in run 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] run_simple(host, port, self, **options) 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/ws/virtenv/lib/python2.6/site-packages/Werkzeug-0.8.3-py2.6.egg/werkzeug/serving.py", line 613, in run_simple 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] test_socket.bind((hostname, port)) 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] File "<string>", line 1, in bind 
[Sun Aug 05 15:46:08 2012] [error] [client 127.3.153.129] error: [Errno 13] Permission denied 
[Sun Aug 05 15:46:09 2012] [error] * Running on http://127.0.0.1:5000/
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] mod_wsgi (pid=31302): Target WSGI script '/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/application' cannot be loaded as Python module. 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] mod_wsgi (pid=31302): Exception occurred processing WSGI script '/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/application'. 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] Traceback (most recent call last): 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/application", line 13, in <module> 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] from run import app as application 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/app-root/runtime/repo/wsgi/run.py", line 2, in <module> 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] app.run(debug = True) 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/ws/virtenv/lib/python2.6/site-packages/Flask-0.9-py2.6.egg/flask/app.py", line 739, in run
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] run_simple(host, port, self, **options) 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] File "/var/lib/stickshift/HASH-ID-HERE/ws/virtenv/lib/python2.6/site-packages/Werkzeug-0.8.3-py2.6.egg/werkzeug/serving.py", line 613, in run_simple 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] test_socket.bind((hostname, port)) 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] File "<string>", line 1, in bind 
[Sun Aug 05 15:46:09 2012] [error] [client 127.3.153.129] error: [Errno 13] Permission denied

Answer 1

在 mod_wsgi 下托管时，您不应该尝试运行 Flask 内置的开发服务器。返回并检查 Flask 中的 mod_wsgi 文档，了解您打算做什么。

http://flask.pocoo.org/docs/deploying/mod_wsgi/

Answer 2

所以我终于弄清楚我的代码出了什么问题。我的 run.py 文件中缺少一行，所以不正确的文件如下所示：

文件不正确：

from app import app
app.run()

这是更正后的工作文件：

from app import app
if __name__ == "__main__": #Need this line for Openshift
    app.run()

部署到 Apache 等生产服务器时显然需要 if 语句

Answer 3

您是否检查过以下来自烧瓶网站的描述： http://flask.pocoo.org/docs/deploying/mod_wsgi/#working-with-virtual-environments

问题：应用授予权限错误 可能是由于您的应用程序以错误的用户身份运行造成的。确保应用程序需要访问的文件夹具有正确的 权限集并且应用程序以正确的用户身份运行（用户和 WSGIDaemonProcess 指令的组参数）