Apache 阿帕奇不会从乘客开始

在httpd.conf上添加ff行之后

LoadModule passenger_module /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13/ext/apache2/mod_passenger.so
PassengerRoot /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13
PassengerRuby /usr/local/bin/ruby

Apache将不再启动

[root@localhost ~]# service httpd restart
Stopping httpd:                                            [FAILED]
Starting httpd:                                            [FAILED]

这是从log那里得到的

[Thu Jul 12 11:26:58 2012] [error] *** Passenger could not be initialized because of this error: Unable to start the Phusion Passenger watchdog (/usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.13/agents/PassengerWatchdog): Permission denied (13)
[Thu Jul 12 11:26:58 2012] [notice] Digest: generating secret for digest authentication ...
[Thu Jul 12 11:26:58 2012] [notice] Digest: done
[Thu Jul 12 11:27:13 2012] [notice] SELinux policy enabled; httpd running as context root:system_r:httpd_t:s0
[Thu Jul 12 11:27:13 2012] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Thu Jul 12 11:31:56 2012] [notice] SELinux policy enabled; httpd running as context root:system_r:httpd_t:s0
[Thu Jul 12 11:31:56 2012] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Thu Jul 12 11:38:22 2012] [notice] SELinux policy enabled; httpd running as context root:system_r:httpd_t:s0
[Thu Jul 12 11:38:22 2012] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)

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请检查/usr/local/lib/ruby/gems/1.9.1/gems/passer-3.0.13/agents/passengerwatchlog上的文件权限，并确保您的apache用户具有运行该文件的权限。

我不是SELinux方面的专家，但这就是问题的原因。（作为apache用户对看门狗进程的权限和访问权）

试试看这里：