0. directry

[root@localhost vagrant]# ll /etc/httpd/conf.d/
total 20
-rw-r--r--. 1 root root  366 10月 19 20:39 README
-rw-r--r--. 1 root root 2926 10月 19 20:39 autoindex.conf
-rw-r--r--. 1 root root 1252 10月 19 16:44 userdir.conf
-rwxr-xr-x. 1 root root  210  2月 10 22:00 vhost.conf
-rw-r--r--. 1 root root  824 10月 19 16:44 welcome.conf
[root@localhost vagrant]# 
[root@localhost vagrant]# ll /etc/httpd/conf.exbind/
total 0
[root@localhost vagrant]#

1. mount

[root@localhost vagrant]# exbind /etc/httpd/conf.d/ /etc/httpd/conf.exbind/
[root@localhost vagrant]#
[root@localhost vagrant]# ps u -C exbind
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root     27621  0.0  0.0  93032   484 ?        Ssl  05:17   0:00 exbind /etc/httpd/conf.d/ /etc/httpd/conf.exbind/
[root@localhost vagrant]#
[root@localhost vagrant]# mount -t fuse.exbind
exbind on /etc/httpd/conf.exbind type fuse.exbind (rw,nosuid,nodev,relatime,user_id=0,group_id=0)
[root@localhost vagrant]#

2. directory

[root@localhost vagrant]# ll /etc/httpd/conf.d/
total 20
-rw-r--r--. 1 root root  366 10月 19 20:39 README
-rw-r--r--. 1 root root 2926 10月 19 20:39 autoindex.conf
-rw-r--r--. 1 root root 1252 10月 19 16:44 userdir.conf
-rwxr-xr-x. 1 root root  210  2月 10 22:00 vhost.conf
-rw-r--r--. 1 root root  824 10月 19 16:44 welcome.conf
[root@localhost vagrant]#
[root@localhost vagrant]# ll /etc/httpd/conf.exbind/
total 20
-rw-r--r--. 1 root root  366 10月 19 20:39 README
-rw-r--r--. 1 root root 2926 10月 19 20:39 autoindex.conf
-rw-r--r--. 1 root root 1252 10月 19 16:44 userdir.conf
-rwxr-xr-x. 1 root root  210  2月 10 22:00 vhost.conf
-rw-r--r--. 1 root root  824 10月 19 16:44 welcome.conf
[root@localhost vagrant]#

3. normal

[root@localhost vagrant]# cat /etc/httpd/conf.d/README

This directory holds configuration files for the Apache HTTP Server;
any files in this directory which have the ".conf" extension will be
processed as httpd configuration files.  The directory is used in
addition to the directory /etc/httpd/conf.modules.d/, which contains
configuration files necessary to load modules.

Files are processed in alphabetical order.

[root@localhost vagrant]#
[root@localhost vagrant]# cat /etc/httpd/conf.exbind/README

This directory holds configuration files for the Apache HTTP Server;
any files in this directory which have the ".conf" extension will be
processed as httpd configuration files.  The directory is used in
addition to the directory /etc/httpd/conf.modules.d/, which contains
configuration files necessary to load modules.

Files are processed in alphabetical order.

[root@localhost vagrant]#

4. execute

[root@localhost vagrant]# cat /etc/httpd/conf.d/vhost.conf
#!/bin/bash

cat<<'EOD'
<VirtualHost *:80>
  ServerName www.hoge.com
  DocumentRoot /var/www/html/
</VirtualHost>

<VirtualHost *:80>
  ServerName test.hoge.com
  DocumentRoot /var/www/test/
</VirtualHost>
EOD
[root@localhost vagrant]#
[root@localhost vagrant]# cat /etc/httpd/conf.exbind/vhost.conf
<VirtualHost *:80>
  ServerName www.hoge.com
  DocumentRoot /var/www/html/
</VirtualHost>

<VirtualHost *:80>
  ServerName test.hoge.com
  DocumentRoot /var/www/test/
</VirtualHost>
[root@localhost vagrant]#