虚拟机上的 Apache 2 *有时*找不到启用 mods 的目录

Question

我在 Ubuntu 10.04 服务器虚拟机 (ESXi 4.1) 上运行 Apache 2，并得到一些非常奇怪的东西：

有时会找到启用 mods 的目录。
有时并非如此。好像没有75%左右没找到。
其间没有任何改变。

以下是 error.log 的一些摘录，结合命令行来演示发生的情况：

因此，我首先停止 Apache，以便更轻松地在日志中查找内容：

CMDLN: root@bunny:/etc/apache2# apache stop  
APWARN: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName  
ERRLOG: [Tue Feb 15 11:45:40 2011] [notice] caught SIGTERM, shutting down  

然后启动它：

CMDLIN: root@bunny:/etc/apache2# apache start
APWARN: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
ERRLOG: [Tue Feb 15 11:46:09 2011] [notice] Apache/2.2.14 (Ubuntu) proxy_html/3.0.1 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations

然后我重新启动它：

CMDLIN: root@bunny:/etc/apache2# apache restart
APWARN: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
ERRLOG: [Tue Feb 15 11:46:15 2011] [notice] SIGHUP received.  Attempting to restart

然后我将目录更改回一个以测试它使用我的 shell 路径的理论

CMDLIN: root@bunny:/etc/apache2# cd ..
CMDLIN: root@bunny:/etc# apache restart
APWARN: apache2: Syntax error on line 33 of /etc/apache2/apache2.conf: Include directory 'mods-enabled' not found
ERRLOG: apache2: Syntax error on line 33 of /etc/apache2/apache2.conf: Include directory 'mods-enabled' not found

到目前为止看起来...有点..

CMDLIN: root@bunny:/etc# apache restart
APWARN: apache2: Syntax error on line 33 of /etc/apache2/apache2.conf: Include directory 'mods-enabled' not found

看起来还是这样，但是这次没有日志错误。换回apache目录再试一下

CMDLIN: root@bunny:/etc# cd apache2/
CMDLIN: root@bunny:/etc/apache2# apache restart
APWARN: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
APWARN: httpd not running, trying to start
ERRLOG: [Tue Feb 15 11:46:30 2011] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run?
ERRLOG: [Tue Feb 15 11:46:30 2011] [notice] Apache/2.2.14 (Ubuntu) proxy_html/3.0.1 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations

嗯，看起来就是这样了，对吧？至于为什么...不知道...

除了 DNS 之外再次正常重启...

CMDLIN: root@bunny:/etc/apache2# apache restart
APWARN: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
ERRLOG: [Tue Feb 15 11:46:36 2011] [notice] SIGHUP received.  Attempting to restart

到目前为止一切顺利...等等...哎呀，这个当我没有更改目录时出现在日志中，而 Apache 正在尝试启动，但却关闭了。

ERRLOG: apache2: Syntax error on line 33 of /etc/apache2/apache2.conf: Include directory 'mods-enabled' not found

我去重新启动它，然后...

CMDLIN: root@bunny:/etc/apache2# apache restart
APWARN: apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
APWARN: httpd not running, trying to start
ERRLOG: [Tue Feb 15 11:46:45 2011] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run?
ERRLOG: [Tue Feb 15 11:46:45 2011] [notice] Apache/2.2.14 (Ubuntu) proxy_html/3.0.1 mod_perl/2.0.4 Perl/v5.10.1 configured -- resuming normal operations

而且它是备份。我很困惑。

我不知道为什么会发生这种情况，而且这样做也是没有意义的。我的直觉告诉我，它不知何故没有找到正确的路径，并且由于某种原因期望启用 mods 与我在 shell 中的位置相关......而这本身就会一直很毛茸茸，当 Apache 在运行过程中因同样的“错误”而关闭时，情况变得更糟

这是我的 httpd.conf：

<Location ~ "/ws/?.*$">
    SetHandler perl-script
    PerlResponseHandler Webservices::Qmedtrix
</Location>

<Directory /var/www>
    Options +ExecCGI +Includes
</Directory>

<Directory /usr/share>
    Options ExecCGI FollowSymlinks Indexes
</Directory>

ProxyPass /group http://localhost:8080/group
ProxyPassReverse /group http://localhost:8080/group

这是我的 apache2.conf：

LockFile ${APACHE_LOCK_DIR}/accept.lock
PidFile ${APACHE_PID_FILE}
Timeout 300
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15

StartServers          2
MinSpareThreads      25
MaxSpareThreads      75
ThreadLimit          64
ThreadsPerChild      25
MaxClients          150
MaxRequestsPerChild   0

User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}

AccessFileName .htaccess

<Files ~ "^\.ht">
    Order allow,deny
    Deny from all
    Satisfy all
</Files>

DefaultType text/plain
HostnameLookups On
ErrorLog ${APACHE_LOG_DIR}/error.log

LogLevel warn

Include mods-enabled/*.load
Include mods-enabled/*.conf

Include httpd.conf
Include ports.conf

LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined
LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent

Include conf.d/

Include sites-enabled/

这是我的默认虚拟域：

<VirtualHost *:80>
    ServerAdmin webmaster@localhost
    DirectoryIndex index.shtml index.html

    DocumentRoot /var/www
    <Directory />
        Options FollowSymLinks
        AllowOverride None
    </Directory>
    <Directory /var/www/>
        Options Indexes FollowSymLinks MultiViews +Includes +ExecCGI
        AllowOverride None
        Order allow,deny
        allow from all
    </Directory>

    ErrorLog /var/log/apache2/error.log

    # Possible values include: debug, info, notice, warn, error, crit,
    # alert, emerg.
    LogLevel warn

    CustomLog /var/log/apache2/access.log combined

</VirtualHost>

和我的 envars 文件：

#unset HOME
# I have tried the above line enabled and not, no difference.

if [ "${APACHE_CONFDIR##/etc/apache2-}" != "${APACHE_CONFDIR}" ] ; then
        SUFFIX="-${APACHE_CONFDIR##/etc/apache2-}"
else
        SUFFIX=
fi

export APACHE_RUN_USER=www-data
export APACHE_RUN_GROUP=www-data
export APACHE_PID_FILE=/var/run/apache2$SUFFIX.pid
export APACHE_RUN_DIR=/var/run/apache2$SUFFIX
export APACHE_LOCK_DIR=/var/lock/apache2$SUFFIX
export APACHE_LOG_DIR=/var/log/apache2$SUFFIX
export LANG=C
export LANG

我'我难住了。

有什么想法吗？

Answer 1

我也遇到了同样的问题，也是在 KVM 虚拟客户端上。
我的解决方案是取消注释以下行：

#ServerRoot“/etc/apache2”

希望这可以帮助下一个开始想知道为什么必须在“/etc/apache2”目录中运行“apache2ctl start”的人，以便成功;)

Answer 2

apachectl 是一个 bash 脚本。
您可能想要向 Ubuntu BTS 提交有关该行为的错误报告。

Answer 3

您应该删除 /etc/envvars 文件中的行：

#unset HOME
# I have tried the above line enabled and not, no difference.

if [ "${APACHE_CONFDIR##/etc/apache2-}" != "${APACHE_CONFDIR}" ] ; then
        SUFFIX="-${APACHE_CONFDIR##/etc/apache2-}"
else
        SUFFIX=
fi

删除所有内容。

然后还编辑您的环境变量以删除您的 $ 后缀，以便您的最终文件看起来像这样：

export APACHE_RUN_USER=www-data
export APACHE_RUN_GROUP=www-data
export APACHE_PID_FILE=/var/run/apache2.pid
export APACHE_RUN_DIR=/var/run/apache2
export APACHE_LOCK_DIR=/var/lock/apache2
export APACHE_LOG_DIR=/var/log/apache2
export LANG=C
export LANG

我完全相同与您遇到的问题相同。并在使用环境变量后修复了它。