本文介绍在AWS EC2上部署OSQA，使用环境是：Ubuntu+apache+MySQL。
1.安装Python模块
OSQA是用Python编写的，安装Python一些模块，相关命令如下：
sudo apt-get install python-setuptools # python-setuptools包含easy_install
# 安装Python其他模块
sudo easy_install ElementTree Markdown html5lib python-openid
sudo apt-get install python-mysqldb # sudo easy_install mysql-python
sudo apt-get install python-django
sudo apt-get install libapache2-mod-wsgi # 安装mod-wsgi, sudo a2enmod mod-wsgi
#sudo vim /etc/apache2/apache2.conf # 这一步,个人认为没必要
#added by sparkandhsine,
#LoadModule wsgi_module modules/mod_wsgi.so
安装South，时间有些久了，忘了装这个干嘛了。
# South ships with a full database-agnostic API for performing schema changes on databases, much like Django’s ORM provides data manipulation support.
sudo apt-get install python-pip
sudo pip install south
2.创建数据库
(1)下载源代码
/var/www/$ git clone https://github.com/OSQA/osqa.git
(2)新建一个数据库
mysql -u root -p
# 输入密码
create database osqa DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
(3)生成数据库内容
在/var/www/osqa/目录下运行命令python manage.py syncdb自动生成osqa数据库，如下：
/var/www/osqa$ python manage.py syncdb
......
You just installed Django's auth system, which means you don't have any superusers defined.
Would you like to create one now? (yes/no): no
Installing custom SQL ...
Installing indexes ...
Installed 0 object(s) from 0 fixture(s)
3.配置OSQA
(1)创建osqa.wsgi文件
$cp osqa.wsgi.dist osqa.wsgi
# 修改osqa.wsgi的sys.path.append
# osqa.wsgi文件内容如下:
import os
import sys
sys.path.append('/var/www')
sys.path.append('/var/www/osqa')
# The first part of this module name should be identical to the directory name
# of the OSQA source. For instance, if the full path to OSQA is
# /home/osqa/osqa-server, then the DJANGO_SETTINGS_MODULE should have a value
# of 'osqa-server.settings'.
os.environ['DJANGO_SETTINGS_MODULE'] = 'osqa.settings'
import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
(2)创建settings_local.py文件
$cp settings_local.py.dist settings_local.py
$vi settings_local.py
# settings_local.py需要修改的内容如下：
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'osqa',
'USER': 'root',
'PASSWORD': '**********',
'HOST': '',
'PORT': '',
'CONN_MAX_AGE': 600,
}
}
APP_URL = 'http://www.tobediff.com
LANGUAGE_CODE = 'zh_CN'
ALLOWED_HOSTS = ('tobediff.com',)
4.web服务器配置文件
在/etc/apache2/sites-available/目录下创建配置文件osqa.conf，对着000-default.conf修改，最后内容如下（以tobediff.com为例）：
# Must be readable and writable by apache
WSGISocketPrefix ${APACHE_RUN_DIR}
#NOTE: all urs below will need to be adjusted if
#settings.FORUM_SCRIPT_ALIAS !='' (e.g. = 'forum/')
#this allows "rooting" forum at [http://example.com/forum], if you like
<VirtualHost *:80>
ServerAdmin admin@tobediff.com
DocumentRoot /var/www/osqa
ServerName tobediff.com
#run mod_wsgi process for django in daemon mode
#this allows avoiding confused timezone settings when
#another application runs in the same virtual host
WSGIDaemonProcess OSQA
WSGIProcessGroup OSQA
#force all content to be served as static files
#otherwise django will be crunching images through itself wasting time
Alias /m/ "/var/www/osqa/forum/skins/"
<Directory "/var/www/osqa/forum/skins">
Require all granted
</Directory>
Alias /upfiles/ "/var/www/osqa/forum/upfiles/"
<Directory "/var/www/osqa/forum/upfiles">
Require all granted
</Directory>
#this is your wsgi script described in the prev section
WSGIScriptAlias / /var/www/osqa/osqa.wsgi
CustomLog ${APACHE_LOG_DIR}/osqa.access.log common
ErrorLog ${APACHE_LOG_DIR}/osqa.error.log
</VirtualHost>
启用设置文件：
sudo a2ensite osqa.conf
sudo service apache2 restart
5.修改hosts文件
打开/etc/hosts文件，在文件末尾添加如下内容：
# added by sparkandshine
# xx.xx.xx.xx为AWS EC2 Elastic IP
xx.xx.xx.xx tobediff.com
6.修改DNS解析
将zhilitea.com的A记录@解析到xx.xx.xx.xx(为AWS EC2 Elastic IP)。
@ --> xx.xx.xx.xx # xx.xx.xx.xx为AWS EC2 Elastic IP
PS: 若不能正常访问，可以查看错误日志文件/var/log/apache2/osqa.error.log。
7.遇到问题及解决
7.1.500 Sever Error
安装完访问提示错误: 500 Server Error。产生这个问题的原因是markdown版本太高导致的不兼容，解决方法就是使用低版本的markdown，命令如下:
sudo pip install Markdown==2.4.1
7.2.Internal Server Error
查看了错误日志，部分内容如下:
mod_wsgi (pid=2131): Exception occurred processing WSGI script '/var/www/osqa/osqa.wsgi'.
解决问题可能在这里:
Exception occurred processing WSGI script：http://stackoverflow.com/questions/18985194/exception-occurred-processing-wsgi-script
Django mod_wsgi: Exception occurred processing wsgi script：http://stackoverflow.com/questions/24122175/django-mod-wsgi-exception-occurred-processing-wsgi-script