以两台服务器为例：

主服务器： 192.168.1.100

从服务器： 192.168.1.101

1.安装rsync (主服务器与从服务器同时安装)

使用xinetd管理rsync

yum install rsync xinetd

设置开机启动

vi /etc/xinetd.d/rsync

　　...

　　修改为 disable = no

　　...

　　启动xinetd

　　/etc/init.d/xinetd start

2.主服务器配置

　　vi /etc/rsyncd.conf

pid file = /var/run/rsyncd.pid

port = 873
address = 192.168.1.100

uid = www
gid = www

use chroot = yes
read only = yes

hosts allow = 192.168.1.101
hosts deny = *

max connections = 10

transfer logging = yes
log file = /data/logs/rsync_server.log
syslog facility = local3

timeout = 600

[data_1]
path = /data/www/data_1/
exclude = application/Runtime/ www/logs/  runtime/
auth users = www
list = yes
ignore errors
secrets file = /etc/rsyncd.password
comment = data_1

　　vi /etc/rsyncd.password

　　...

　　test

　　...

　　设置权限

　　chmod 600 /etc/rsyncd.conf

　　chmod 600 /etc/rsyncd.password

　　重启rsync服务

　　/etc/init.d/xinetd restart

　　检查服务是否运行

　　lsof -i:873

修改inotify参数
sysctl -w fs.inotify.max_queued_events="9999999"
sysctl -w fs.inotify.max_user_watches="9999999"
sysctl -w fs.inotify.max_user_instances="65535"

　　编辑inotify监控脚本

　　vi /opt/sh/inotify.sh

src=/data/www/data_1/
des1=data_1
host1=192.168.1.101
user1=www

/usr/bin/inotifywait -mrq --timefmt '%d/%m/%y %H:%M' --format '%T %w %f' -e modify,delete,create,attrib $src | while read file D E F;

do
/usr/bin/rsync -uoavzcr --progress $src $user1@$host1::$des1 --password-file=/etc/rsyncd.password
done

3.从服务器配置

同主服务器一样安装rsync和xinetd

配置从服务器rsyncd.conf

pid file = /var/run/rsyncd.pid

port = 873
address = 192.168.1.101

uid = www
gid = www

use chroot = yes
read only = no #一定关闭

hosts allow = 192.168.1.100
hosts deny = *

max connections = 10

transfer logging = yes
log file = /data/logs/rsync_slave.log
syslog facility = local3

timeout = 600

[data_1]
path = /data/www/data_1/
exclude = application/Runtime/ www/logs/  runtime/
auth users = www
list = yes
ignore errors
secrets file = /etc/rsyncd.password
comment = data_1

4.开始同步测试

　　在两台服务器分别建立一样的目录层级

　　mkdir /data/www/data_1/

　　主服务器开启inotify监控脚本

　　chmod +x /opt/sh/inotify.sh

　　/opt/sh/inotify.sh

　　加入开机启动

　　echo "/opt/sh/inotify.sh &" >> /etc/rc.local

　　在主服务器添加测试文件观察从服务器是否自动同步

　　touch /data/www/data_1/1.txt

PS:

1.rsync配置权限统一修改为600

2.inotify脚本注意添加运行权限

3.注意主服务器与从服务器需要同步的文件夹初始权限需要相同

4.关键在于从服务器的配置