在过去的几天里，我一直在努力使用Bitnami Djangostack在 Amazon EC2 上部署 Django 应用程序。当我去我的主页（比如http://example.com）时，我看到默认的 bitnami 页面（/opt/bitnami/apache2/htdocs/index.html），但是，当我打开http://example.com/ portnoy，我得到“内部服务器错误”。但众所周知，如果 mod_wsgi 设置正确，来自 httpd.conf 的 DocumentRoot 值将被忽略，因此，我应该在访问http://example.com时看到我的 Django 应用程序。本质上，主要错误是 - '目标 WSGI 脚本不能作为 Python 模块加载'。两个问题：1) 任何想法如何修复这些 mod_wsgi 错误（Apache 日志如下）？2）如何禁用默认/opt/bitnami/apache2/htdocs/index.html页面并在访问http://example.com时从 django 应用程序显示我的主页？先感谢您！
细节
在我的 EC2 实例上，我正在运行带有 DjangoStack 1.4-1 的 64 位 Ubuntu 12.04。我的 Django 项目位于此处 - /opt/bitnami/apps/django/django_projects/portnoy。
root@example:/opt/bitnami/apps/django/django_projects/portnoy# ls
manage.py README.md settings.py site_media users Procfile sandbox static test.py topics urls.py views.py __init__.pyc templates testviews.py
Apache 错误日志 ( /opt/bitnami/apache2/logs/error_log )：
[Wed Jul 04 02:29:00 2012] [error] [client 140.180.6.212] File does not exist: /opt/bitnami/apache2/htdocs/favicon.ico
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] mod_wsgi (pid=3990): Target WSGI script '/opt/bitnami/apps/django/scripts/django.wsgi' cannot be loaded as Python module.
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] mod_wsgi (pid=3990): Exception occurred processing WSGI script '/opt/bitnami/apps/django/scripts/django.wsgi'.
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] Traceback (most recent call last):
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File "/opt/bitnami/apps/django/scripts/django.wsgi", line 8, in <module>
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] import django.core.handlers.wsgi
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File "/opt/bitnami/apps/django/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 8, in <module>
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] from django import http
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File "/opt/bitnami/apps/django/lib/python2.7/site-packages/django/http/__init__.py", line 119, in <module>
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] from django.http.multipartparser import MultiPartParser
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File "/opt/bitnami/apps/django/lib/python2.7/site-packages/django/http/multipartparser.py", line 13, in <module>
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] from django.utils.text import unescape_entities
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File "/opt/bitnami/apps/django/lib/python2.7/site-packages/django/utils/text.py", line 4, in <module>
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] from gzip import GzipFile
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File "/opt/bitnami/python/lib/python2.7/gzip.py", line 10, in <module>
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] import io
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File "/opt/bitnami/python/lib/python2.7/io.py", line 60, in <module>
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] import _io
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] ImportError: /opt/bitnami/python/lib/python2.7/lib-dynload/_io.so: undefined symbol: PyUnicodeUCS2_AsEncodedString
[Wed Jul 04 02:29:15 2012] [error] [client 140.180.6.212] File does not exist: /opt/bitnami/apache2/htdocs/favicon.ico
[Wed Jul 04 02:44:00 2012] [error] [client 140.180.6.212] File does not exist: /opt/bitnami/apache2/htdocs/favicon.ico
让我快速介绍一下文件的内容，以使案例更加具体。
这是我的/etc/apache2/sites-available/default文件
<VirtualHost *:80>
ServerAdmin root@example.com
ServerName example.com
Alias /site_media/ /opt/bitnami/apps/django/django_projects/portnoy/site_media/
Alias /static/ /opt/bitnami/apps/django/lib/python2.7/site-packages/django/contrib/admin/static/
Alias /robots.txt /opt/bitnami/apps/django/django_projects/portnoy/site_media/robots.txt
Alias /favicon.ico /opt/bitnami/apps/django/django_projects/portnoy/site_media/favicon.ico
CustomLog "|/usr/sbin/rotatelogs /opt/bitnami/apps/django/django_projects/logs/access.log.%Y%m%d-%H%M%S 5M" combined
ErrorLog "|/usr/sbin/rotatelogs /opt/bitnami/apps/django/django_projects/logs/error.log.%Y%m%d-%H%M%S 5M"
LogLevel warn
WSGIProcessGroup example.com
WSGIScriptAlias / /opt/bitnami/apps/django/scripts/django.wsgi
<Directory /opt/bitnami/apps/django/django_projects/portnoy/site_media>
Order deny,allow
Allow from all
Options -Indexes FollowSymLinks
</Directory>
<Directory /opt/bitnami/apps/django/django_projects/portnoy/conf/apache>
Order deny,allow
Allow from all
</Directory>
</VirtualHost>
这是我的/opt/bitnami/apps/django/scripts/django.wsgi文件
import os, sys
sys.path.append('/opt/bitnami/apps/django/lib/python2.7/site-packages/')
sys.path.append('/opt/bitnami/apps/django/django_projects')
sys.path.append('/opt/bitnami/apps/django/django_projects/portnoy')
os.environ['DJANGO_SETTINGS_MODULE'] = 'portnoy.settings'
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
这是/opt/bitnami/apache2/conf/httpd.conf文件的相关部分：
ServerRoot "/opt/bitnami/apache2"
Listen 80
ServerName example.com
DocumentRoot "/opt/bitnami/apache2/htdocs"
LoadModule wsgi_module modules/mod_wsgi.so
WSGIPythonHome /opt/bitnami/python
Include "/opt/bitnami/apache2/conf/ssi.conf"
Include "/opt/bitnami/apps/django/conf/django.conf"
Include "/opt/bitnami/apache2/conf/bitnami/httpd.conf"
注意：我在这篇文章中使用 example.com 来指代我实际拥有的域。