Linux 实现本、异地远程数据实时同步功能

**centos 6.5**
生产服务器目录: /home/zytest/files
备份服务器目录: /home/zytest/files
用户 / 密码: zytest / zytest

yum install gcc rsync -y

cd /root 
tar xfvz inotify-tools-3.13.tar.gz

cd inotify-tools-3.13
./configure
make
make install     
 
/usr/local/bin/inotifywait ##检查是否安装成功

yum install xinetd rsync -y

useradd -u 600 zytest 
 passwd zytest    
 zytest
 su - zytest -c 'mkdir /home/zytest/files' ##创建同步目录

disable  = yes  ==> disable  = no
flags        = IPv6  ==> flags       = IPv4
server_args = --daemon ==> server_args = --daemon --config=/etc/rsyncd.conf

uid = root
gid = root
use chroot = no
max connections = 1000
strict mode = yes
port = 873
pid file = /var/run/rsyncd.pid 
lock file = /var/run/rsyncd.lock 
log file = /var/log/rsyncd.log
# following for user "zytest", change for other users
[zytest]
path = /home/zytest
ignore errors
auth users =zytest
secrets file = /home/rsync-dst.ps
read only = no
list = false

Ps: rsyncd 配置文件在 xinetd上，所以备份服务器安装xinetd

echo zytest:zytest >> /home/rsync-dst.ps
chmod 600 /home/rsync-dst.ps

/etc/rc.d/init.d/xinetd restart

#!/bin/sh
#chkconfig: 3 78 10
 
#This file exist from compile
if [ ! -f /usr/local/bin/inotifywait ]
then
 echo "cannot start. file inotifywait NOT exist!"
 exit
fi
 
#This file is runnable shell script
if [ ! -f /usr/local/bin/inosync.so.1 ]
then
 echo "contact administrator. inosync.so.1 NOT exist!"
 exit
fi
 
case "$1" in
 'start')
 /usr/local/bin/inosync.so.1 &
;;
 
'stop')
 pid=`ps -ef | grep -v grep | grep "inotifywait" | awk '{print $2}'`
 kill -9 $pid 2>&1
;;
 
'restart')
 $0 stop
 $0 start
;;
 
esac

chmod a+x /root/inosync
 cp /root/inosync /etc/rc.d/init.d

rhost=**备份服务器IP**
user=zytest
src=/home/zytest/files
dst=zytest
#dst corresponding to [zytest] in file /etc/rsyncd.conf on dst server
log=/root/inosync.log
/usr/local/bin/inotifywait -mrq --timefmt '%d/%m/%y %H:%M:%S' --format '%T %w%f %e' -e close_write,create,move,delete,attrib $src | while read files
 do
 echo == rsync begin == >> $log
 rsync -avP --password-file=/home/rsync-src.ps --delete $src $user@$rhost::$dst >> $log 2>&1
 echo -- rsyncd -- >> $log
 date >> $log
 echo "${files} was rsynced " >> $log 2>&1
 done

PS: %T后面有空格 %f和%e之间也有空格

chmod a+x /root/inosync.so.1
cp /root/inosync.so.1 /usr/local/bin

echo zytest >> /home/rsync-src.ps
chmod 600 /home/rsync-src.ps

chkconfig --level 3 inosync on
/etc/rc.d/init.d/inosync start

在生产服务器/home/zytest/files目录下创建文件和文件夹，查看备份存储是否也同步了文件和文件夹，同步即成功。
过程可通过日志查看

tail -f /root/inosync.log

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