如何在带有Python 3.4和Apache2的CentOS 7上将PostgreSQL与Django应用程序一起使用

我正在运行CentOS 7服务器，并通过执行以下操作设法建立了Django站点并开始运行：

• 然 yum install httpd gcc mod_wsgi
• 已安装PostgreSQL 9.4
• 下载并编译了Python 3.4
• 使用pyvenv3.4创建虚拟环境
• pip install django django-extensions psycopg2在虚拟环境中跑
• mysite在虚拟环境中启动了一个新的Django项目
• 最后配置了Apache2和PostgreSQL 9.4

前面的步骤成功安装了一个新的Django 1.8项目，并且能够It worked!在浏览器中查看该页面。

当我修改settings.py文件以将PostgreSQL 9.4用作项目数据库时，问题就开始了。我将默认DATABASES字典更改为以下内容：

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'myproject',
        'USER': 'myprojectuser',
        'PASSWORD': 'password',
        'HOST': 'localhost',
        'PORT': '',
    }
}

当我在浏览器中按刷新时，然后Internal Server Error从Apache获得一个，并且error_log说：

[] mod_wsgi (pid=1049): Target WSGI script '/var/www/django/projects/mysite/mysite/wsgi.py' cannot be loaded as Python module.
[] mod_wsgi (pid=1049): Exception occurred processing WSGI script '/var/www/django/projects/mysite/mysite/wsgi.py'.
[] Traceback (most recent call last):
[]  File "/var/www/django/projects/mysite/mysite/wsgi.py", line 16, in <module>
[]     application = get_wsgi_application()
[]   File "/var/www/django/virtual_environments/mysite/lib/python3.4/site-packages/django/core/wsgi.py", line 14, in get_wsgi_application
[]     django.setup()
[]   File "/var/www/django/virtual_environments/mysite/lib/python3.4/site-packages/django/__init__.py", line 18, in setup
[]     apps.populate(settings.INSTALLED_APPS)
[]   File "/var/www/django/virtual_environments/mysite/lib/python3.4/site-packages/django/apps/registry.py", line 78, in populate
[]     raise RuntimeError("populate() isn't reentrant")
[] RuntimeError: populate() isn't reentrant
[] mod_wsgi (pid=1049): Target WSGI script '/var/www/django/projects/mysite/mysite/wsgi.py' cannot be loaded as Python module.
[] mod_wsgi (pid=1049): Exception occurred processing WSGI script '/var/www/django/projects/mysite/mysite/wsgi.py'.
[] Traceback (most recent call last):
[]   File "/var/www/django/projects/mysite/mysite/wsgi.py", line 16, in <module>
[]     application = get_wsgi_application()
[]   File "/var/www/django/virtual_environments/mysite/lib/python3.4/site-packages/django/core/wsgi.py", line 14, in get_wsgi_application
[]     django.setup()
[]   File "/var/www/django/virtual_environments/mysite/lib/python3.4/site-packages/django/__init__.py", line 18, in setup
[]     apps.populate(settings.INSTALLED_APPS)
[]   File "/var/www/django/virtual_environments/mysite/lib/python3.4/site-packages/django/apps/registry.py", line 78, in populate
[]     raise RuntimeError("populate() isn't reentrant")
[] RuntimeError: populate() isn't reentrant

我已经尽力解决了所有问题。我认为问题是特定于Python 3.4的使用，也许没有正确版本的mod_wsgi可以使用。

我试过通过pip安装mod_wsgi，但不确定如何使Apache使用该版本，而不是系统范围的版本。可能甚至不是导致问题的原因。

我在这个网站上几乎尝试了所有问答，但是没有运气，因此我们将不胜感激，

谢谢。

编辑

这是我VirtualHost对Apache2的配置：

<VirtualHost *:80>
ServerAdmin [email protected]
ServerName example.com

DocumentRoot /var/www/django/projects/mysite/mysite

WSGIScriptAlias / /var/www/django/projects/mysite/mysite/wsgi.py

WSGIDaemonProcess example.com python-path=/var/www/django/projects/mysite:/var/www/django/virtual_environments/mysite/lib/python3.4/site-packages

WSGIProcessGroup example.com

  <Directory /var/www/django/projects/mysite/mysite>
    <Files wsgi.py>
      Require all granted
    </Files>
  </Directory>
</VirtualHost>