centos7系统中已经默认安装rsync
1：主服务器配置
（1）修改rsyncd.conf 配置文件
[root@localhost app]# vi /etc/rsyncd.conf
motd file = /etc/rsyncd.motd
log file = /var/log/rsyncd.log
pid file = /var/run/rsyncd.pid
lock file = /var/run/rsyncd.lock
port = 873
address = 192.168.0.24
uid = wzh
gid = wzh
use chroot = no
read only = no
max connections = 10
timeout = 900
ignore nonreadable = yes
[common]
comment = rsync data
path = /data/imgs/
ignore errors
auth users = wzh
secrets file = /etc/rsyncd.secrets
hosts allow = 192.168.0.0/255.255.255.0
hosts deny = *
list = false
（2）创建用户密码
echo "wzh:wzh" > /etc/rsyncd.secrets
chmod 600 /etc/rsyncd.secrets
（3）创建提示信息文件
echo "rsync data" > /etc/rsyncd.motd
（4）配置防火墙
firewall-cmd --zone=public --add-port=873/tcp --permanent
firewall-cmd --reload
（5）启动服务
rsync --daemon
echo "rsync --daemon" >> /etc/rc.local
2：备服务器配置
（1）创建密码文件
echo "wzh" > /home/wzh/passwd
chmod 600 /home/wzh/passwd
（2）拉取
[wzh@localhost ~]$ rsync -avz --password-file=/home/wzh/passwd wzh@192.168.0.24::common /data/imgs/
rsync data
receiving incremental file list
./
sent 58 bytes received 121 bytes 358.00 bytes/sec
total size is 0 speedup is 0.00
（3）将命令加入到定时任务中，每1分钟执行同步一次
$ vi /home/wzh/rsync_data_imgs.sh
#!/bin/bash
rsync -avz --password-file=/home/wzh/passwd wzh@192.168.0.24::common /data/imgs/ > /dev/null 2>&1 &
$ crontab -e
*/1 * * * * /home/wzh/rsync_data_imgs.sh
$ crontab -l