在几个Apache上提供一个Django应用程序

Question

我们有一个由Apache (Mod)提供的Django应用程序，它具有这样的配置：

<VirtualHost vhost:80>
  # ...
  WSGIScriptAlias / /path/to/wsgi.py
</VirtualHost>

我们希望将单个应用程序服务到两个虚拟主机中：vhost:80和vhost:443 .客户端迁移所需的时间，最后只需将其保存在https虚拟主机上。是否有可能将指令WSGIScriptAlias / /path/to/wsgi.py复制到第二个虚拟主机(vhost:443)中，或者我们是否会遇到使用相同DB运行同一应用程序两倍的问题？

Answer 1

首先，您希望确保您使用的是mod_wsgi的守护进程模式，而不是嵌入式模式。无论哪种方式，如果正在使用多进程配置，则已经有多个应用程序实例访问相同的数据库。这通常不是一个问题。当为SSL添加虚拟主机时，问题是进程数量加倍。这就是守护进程模式出现的地方。典型的配置是：

<VirtualHost *:80>
  ServerName sitename.example.com

  # Define a daemon process group.

  WSGIDaemonProcess sitename

  # Specify WSGI application and delegate to daemon process group.
  # As delegating here, don't need WSGIProcessGroup/WSGIApplicationGroup.

  WSGIScriptAlias / /path/to/wsgi.py process-group=sitename application-group=%{GLOBAL}

  # ... access control directives

</VirtualHost>

<VirtualHost *:443>
  ServerName sitename.example.com

  # ... SSL options

  # Specify WSGI application and delegate to daemon process group.
  # As delegating here, don't need WSGIProcessGroup/WSGIApplicationGroup.
  #
  # Note that we did not define a daemon process group in this virtual
  # host. Instead we rely on fact that can reach across and use daemon
  # process group defined in virtual host for port 80. This is possible
  # as value of ServerName is the same.

  WSGIScriptAlias / /path/to/wsgi.py process-group=sitename application-group=%{GLOBAL}

  # ... access control directives

</VirtualHost>

如果需要调整容量和性能，则将process=nnn和threads=nnn选项添加到WSGIDaemonProcess中。还要确保修改您可能希望在守护进程组上设置的超时选项。

• http://modwsgi.readthedocs.io/en/develop/configuration-directives/WSGIDaemonProcess.html