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情景再现： 在我将 Flask应用程序部署到 Apache 的时候，我得到了一个 500 internal sever error 的错误。 查看错误日志得到下面信息
[Tue Jun 21 11:29:46 2016] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.1e-fips mod_wsgi/3.2 Python/2.7.3 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming # [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] mod_wsgi (pid=1334): Target WSGI script '/var/www/html/report/report.wsgi' cannot be loaded as Python module. [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] mod_wsgi (pid=1334): Exception occurred processing WSGI script '/var/www/html/report/report.wsgi'. [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] Traceback (most recent call last): [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] File "/var/www/html/report/report.wsgi", line 10, in <module> [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] from report import app as application [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] File "/var/www/html/report/report.py", line 11, in <module> [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] from flask import Flask [Tue Jun 21 11:29:49 2016] [error] [client 172.16.7.158] ImportError: No module named falsk
Python 应用程序是 通过源码编译的，安装目录为 /usr/local/Python2.7.3 Flask 模块是存在的， 问题就在 为啥 找不到她呢？？？
#python -V Python 2.7.3 #pip freeze | grep -i flask Flask==0.10.1 Flask-Bootstrap==3.3.5.7 Flask-Moment==0.5.1 Flask-Script==2.0.5 Flask-SQLAlchemy==2.1 Flask-WTF==0.12
看起来应该是 apache/mod_wsgi 所使用的Python版本不同 或者是 找的 Python 路径不对 我们先来看看 mode_wsgi 用的是哪个版本的Python https://code.google.com/archive/p/modwsgi/wikis/CheckingYourInstallation.wiki (See Python Installation In Use and Python Shared Library).
现在在用的是什么版本的Python
In [1]: import os,sys In [2]: sys.path Out[2]: ['', '/usr/local/bin', '/usr/local/lib/python2.7/site-packages/setuptools-18.7.1-py2.7.egg', '/usr/local/lib/python27.zip', '/usr/local/lib/python2.7', '/usr/local/lib/python2.7/plat-linux2', '/usr/local/lib/python2.7/lib-tk', '/usr/local/lib/python2.7/lib-old', '/usr/local/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/site-packages', '/usr/local/lib/python2.7/site-packages/IPython/extensions', '/root/.ipython'] In [3]: print sys.version 2.7.3 (default, Jul 15 2015, 04:32:15) [GCC 4.4.7 20120313 (Red Hat 4.4.7-11)] In [4]: print sys.prefix /usr/local
因此对于 采用非标准路径安装的情况下 需要在 Apache 网站配置文件中添加如下配置
WSGIPythonHome /usr/local
之后重新加载 Apache 配置文件 Python Shared Library
^_^[11:49:47][[email protected] report]#rpm -qa | grep mod_wsgi mod_wsgi-3.2-7.el6.x86_64 @_@[12:47:55][[email protected] report]#rpm -ql mod_wsgi-3.2-7.el6.x86_64 /etc/httpd/conf.d/wsgi.conf /usr/lib64/httpd/modules/mod_wsgi.so /usr/share/doc/mod_wsgi-3.2 /usr/share/doc/mod_wsgi-3.2/LICENCE /usr/share/doc/mod_wsgi-3.2/README @_@[12:48:08][[email protected] report]#ldd /usr/lib64/httpd/modules/mod_wsgi.so linux-vdso.so.1 => (0x00007ffd4c1dc000) libpython2.7.so.1.0 => /usr/local/Python2.7.3/lib/libpython2.7.so.1.0 (0x00007efdd747b000) libpthread.so.0 => /lib64/libpthread.so.0 (0x00007efdd725d000) libdl.so.2 => /lib64/libdl.so.2 (0x00007efdd7059000) libutil.so.1 => /lib64/libutil.so.1 (0x00007efdd6e56000) libm.so.6 => /lib64/libm.so.6 (0x00007efdd6bd2000) libc.so.6 => /lib64/libc.so.6 (0x00007efdd683d000) /lib64/ld-linux-x86-64.so.2 (0x00007efdd7a91000)
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