Apache部署多个django site project

按照TUT-Apache+Django+mod_wsgi教学文件中在apache中部署一个django site已经OK，如何在Apache下部署多个django site呢

背景

nuMaps India准备部署在同一台DZM(192.168.200.241)机器上，按照先前的apache配置并不能同时运行两个wsgi django site，原因在于httpd.conf配置“WSGIScriptAlias / /path/to/mysite/django.wsgi”将所有的请求转发到一个django wsgi application上

先前numaps.garmin.com/numaps.garmin.com.cn/numaps.garmin.com.tw三个域名对应到同一台DMZ主机上，并且在Apache上也没有对这三个域名做额外处理，这三个域名都用于nuMaps China回报系统和GarMaps API

之后India回报系统域名numaps.garmin.co.in(待定)也会映射到192.168.200.241上，那么如何区分不同HTTP Host的Request，答案就是使用Apache Virtual Host

配置

•  注释或者删除原先配置行
  #WSGIScriptAlias / /path/to/mysite/django.wsgi

  #<Directory /path/to/mysite>

  #       Order Deny,Allow

  #       Allow from all

  #</Directory>
• 去掉默认virtual host的include注释，如果默认没有virtual host，手动添加配置
  Include conf/extra/httpd-vhosts.conf
• 配置virtual host
  NameVirtualHost *:80        #配置NameVirtualHost，用于VirtualHost指令
  <VirtualHost *:80>#配置特定IP或者任意IP下特定端口，此处"*:80"参数必须是前面配置好的NamedVirtualHost

      ServerAdmin webmaster@dummy-host2.garmin.com.tw

      DocumentRoot "C:/Documents and Settings/gis/My Documents/nuMapIndia/"

      ServerName numaps.garmin.com #注意此域名对应不同site，目前将该域名用于测试India回报系统。ServerName的域名一定要和DNS中配置的域名一致

      WSGIScriptAlias / "C:/Documents and Settings/gis/My Documents/nuMapIndia/nuMapIndia/wsgi.py"

  </VirtualHost>

  <VirtualHost *:80>

      ServerAdmin webmaster@dummy-host2.garmin.com.tw

      DocumentRoot "C:/Documents and Settings/gis/My Documents/mySite/"

      ServerName numaps.garmin.com.cn

      WSGIScriptAlias / "C:/Documents and Settings/gis/My Documents/mySite/wsgi.py" #WSGIScriptAlias配置还是原来一致

  </VirtualHost>

  <VirtualHost *:80>

      ServerAdmin webmaster@dummy-host2.garmin.com.tw

      DocumentRoot "C:/Documents and Settings/gis/My Documents/mySite/"

      ServerName numaps.garmin.com.tw

      WSGIScriptAlias / "C:/Documents and Settings/gis/My Documents/mySite/wsgi.py"

  </VirtualHost>

  #配置目录权限

  <Directory "C:/Documents and Settings/gis/My Documents/nuMapIndia/">

      Order deny,allow

      Allow from all

  </Directory>

  <Directory "C:/Documents and Settings/gis/My Documents/mySite/">

      Order deny,allow

      Allow from all

  </Directory>

错误

配置完成，启动apache，先访问第一个site没有问题，但是再访问第二个site时出现500错误
错误日志如下

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123] mod_wsgi (pid=7592): Exception occurred processing WSGI script 'C:/Documents and Settings/gis/My Documents/mySite/wsgi.py'.

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123] Traceback (most recent call last):

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\core\\handlers\\wsgi.py", line 236, in __call__

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     self.load_middleware()

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\core\\handlers\\base.py", line 51, in load_middleware

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     mod = import_module(mw_module)

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\utils\\importlib.py", line 35, in import_module

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     __import__(name)

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\contrib\\auth\\middleware.py", line 3, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     from django.contrib.auth.backends import RemoteUserBackend

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\contrib\\auth\\backends.py", line 3, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     from django.contrib.auth.models import Permission

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\contrib\\auth\\models.py", line 8, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     from django.db import models

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\db\\__init__.py", line 40, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     backend = load_backend(connection.settings_dict['ENGINE'])

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\db\\__init__.py", line 34, in __getattr__

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     return getattr(connections[DEFAULT_DB_ALIAS], item)

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\db\\utils.py", line 93, in __getitem__

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     backend = load_backend(db['ENGINE'])

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\db\\utils.py", line 27, in load_backend

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     return import_module('.base', backend_name)

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\utils\\importlib.py", line 35, in import_module

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     __import__(name)

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\db\\backends\\sqlserver_ado\\base.py", line 6, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     import dbapi as Database

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\django\\db\\backends\\sqlserver_ado\\dbapi.py", line 49, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     import pythoncom

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\pythoncom.py", line 2, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     import pywintypes

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\win32\\lib\\pywintypes.py", line 124, in <module>

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     __import_pywin32_system_module__("pywintypes", globals())

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]   File "C:\\Python27\\lib\\site-packages\\win32\\lib\\pywintypes.py", line 114, in __import_pywin32_system_module__

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123]     assert sys.modules[modname] is old_mod

[Thu Apr 18 20:08:03 2013] [error] [client 10.127.9.123] AssertionError

解决方法

• @see Multiple django sites on Apache / Windows / mod_wsgi - problem with win32
• @see Running two Django Apps
  根据网上的相同问题解决方式，找到pywintypes.py文件中如下line 114/115
  if sys.version_info < (3,0):

      assert sys.modules[modname] is old_mod

      assert mod is old_mod

  将其注释

  if sys.version_info < (3,0):

      #assert sys.modules[modname] is old_mod

      #assert mod is old_mod

      pass

  两个站点访问正常，问题解决

其他

• 之前关于apache下同时运行两个django site共享环境变量的可能似乎没有问题
• 在本地运行两个django site测试发现一个奇怪的问题：site访问正常，但是当登陆第一个site后，再去登陆第二个site，登陆成功后点获取回报列表提示未登录，这时再点击一个site的回报列表也提示未登录
  难道django session失效，共用session?共享内存数据了?重启机器后在本地测试没有出现这个问题。在192.168.200.241上测试完全就没有遇到这个问题。