无法连接到 RHEL6 上的 Apache 服务器
问题
现在，我已经是 Apache 的新手了，我当然需要一些帮助来解决我当前的问题。我已经在 3 个不同的系统上安装了 httpd rpm（所有 Advantech 计算机、1 个 Box PC、1 个 Advanced TCA 刀片、1 个 Compact PCI 刀片，并且都安装了 RHEL6）。我已经使用之前在其他安装中使用的文件配置了 Apache。当我发出命令“
# service httpd restart
一切顺利”时，我得到以下输出：
Stopping httpd: [ OK ]
Starting httpd: httpd: apr_sockaddr_info_get() failed for <PC_Name>
httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
[ OK ]
现在，当我尝试通过 Apache 连接到计算机时，我会看到登录屏幕，要求输入用户名和密码，正如您所期望的那样。然而，却无法登录。当我查看 /var/log/httpd/ 中的 error_log 时，它显示以下错误消息：
[Thu Sep 15 14:24:40 2011] [error] [client 192.168.10.175] (13)Permission denied: Could not open password file: /etc/shadow
[Thu Sep 15 14:24:40 2011] [error] [client 192.168.10.175] PAM: user 'root' - not authenticated: System error
在我看来，这要么是配置错误，要么与权限有关。但我似乎无法找出哪个。另一个有趣的事实是，这仅适用于最后两个安装（Advanced TCA 和 Compact PCI），而不适用于第一个安装（Box PC），而所有 3 个安装完全相同。
附加信息
我安装它的方式是从 yum 安装 httpd，
# yum install httpd
接下来安装配置所需的 mod_auth_pam，
# yum install mod_auth_pam
然后我使用从以前的安装中获得的文件配置 Apache（基本上只是替换标准 Apache 安装中的配置文件） ），之后我重新启动了 Apache 服务。
The issue
Now, I am a complete n00b on Apache, and I could certainly use some help with my current issue. I have installed the httpd rpm's on 3 different systems (all Advantech computers, 1 Box PC, 1 Advanced TCA blade, 1 Compact PCI blade, and all have RHEL6 installed). I have configured Apache with files used earlier, on other installations. When I issue the command
# service httpd restart
All goes well and I get this output:
Stopping httpd: [ OK ]
Starting httpd: httpd: apr_sockaddr_info_get() failed for <PC_Name>
httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
[ OK ]
Now, when I try to connect to the machine via Apache, I get the log-in screen asking for the username and password, as you would expect. However, it fails to log-in. When I look at the error_log in /var/log/httpd/, it shows this error message:
[Thu Sep 15 14:24:40 2011] [error] [client 192.168.10.175] (13)Permission denied: Could not open password file: /etc/shadow
[Thu Sep 15 14:24:40 2011] [error] [client 192.168.10.175] PAM: user 'root' - not authenticated: System error
It seems to me that this is either a configuration error, or it has something to do with permissions. Yet I can't seem to find out which. Another interesting fact is, that this only applies to the last two installations(Advanced TCA & Compact PCI), and not the first (Box PC), while all 3 installations are exactly the same.
Additional Info
The way I installed it was install httpd from yum,
# yum install httpd
Next install mod_auth_pam, which is needed by the configuration,
# yum install mod_auth_pam
Then I configured Apache with the files I got from previous installations (which basically is just replacing the configuration files from the standard Apache install), and after that I restarted the Apache service.
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对于此错误“apr_sockaddr_info_get() failed”，
您需要正确设置主机名。
主机名实际非过期域名.com
不要忘记在 httpd.conf 和 /etc/hosts 中设置名称。
For this error "apr_sockaddr_info_get() failed"
You need to properly set your hostname.
hostname actual-non-expired-domain-name.com
Don't forget to set the name in your httpd.conf and in /etc/hosts as well.
我已经能够通过设置 SELinux 允许 Apache 请求来解决这个问题。这是通过发出以下命令来完成的：
Semanage 是policycoreutils-python 包中的一个实用程序。这应该随安装介质一起提供。
I have been able to solve this by setting SELinux to allow Apache requests. This is done by issuing the following command:
Semanage is a utility from the policycoreutils-python package. This should come with the installation medium.