Apache - 使用VirtualHosts的动态ErrorLog和CustomLog

Question

我的动态VirtualHosts在CentOS 6.5和httpd 2.2.15上运行良好。 我可以访问我的网站http://foo.dev.com和http://bar.dev.com。 问题是我没有动态的CustomLog和ErrorLog。

/etc/httpd/conf.d/dev.com.conf：

UseCanonicalName Off

NameVirtualHost *

<VirtualHost *>
    VirtualDocumentRoot "/home/username/PHP/%0/public_html/"
    <Directory "/home/username/PHP/%0/public_html">
        Options Indexes FollowSymLinks
        AllowOverride All
        Order Deny,Allow
        Allow from all
    </Directory>
</VirtualHost>

目录结构：

/home
    /username
        /PHP
            /foo.dev.com
                /public_html
                /logs
            /bar.dev.com
                /public_html
                /logs

我试过了：

    ...

    CustomLog "/home/username/PHP/%{HTTP_HOST}/logs/access_log" combined
    ErrorLog "/home/username/PHP/%{HTTP_HOST}/logs/error_log"
</VirtualHost>

并收到以下错误：

(2)No such file or directory: httpd: could not open error log file /home/username/PHP/%{HTTP_HOST}/logs/error_log
Unable to open logs

还有：

    ...

    CustomLog "/home/username/PHP/%0/logs/access_log" combined
    ErrorLog "/home/username/PHP/%0/logs/error_log"
</VirtualHost>

出现以下错误：

(2)No such file or directory: httpd: could not open error log file /home/username/PHP/%0/logs/error_log.
Unable to open logs

有可能吗？