Linux 通过Rsync+Inotify实现本、异地远程数据实时同步功能
0x0 测试环境
总部生产服务器与分部备份服务器要求实现异地数据备份，环境如下
**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
0x1 生产服务器环境搭建
0x1.1 安装gcc编译器和rsync
yum install gcc rsync -y
0x1.2 拷贝inotify到服务器并解压
cd /root
tar xfvz inotify-tools-3.13.tar.gz
0x1.3 进入inotify 目录安装
cd inotify-tools-3.13 ./configure make make install /usr/local/bin/inotifywait ##检查是否安装成功
0x2 备份服务器环境搭建
0x2.1 安装 xinetd 和 rsync
yum install xinetd rsync -y
0x3 以下内容两台服务器同步操作
useradd -u 600 zytest passwd zytest zytest su - zytest -c 'mkdir /home/zytest/files' ##创建同步目录
0x4 备份服务器上配置rsyncd
0x4.1 编辑/etc/xinetd.d/rsync按照以下内容修改
disable = yes ==> disable = no flags = IPv6 ==> flags = IPv4 server_args = --daemon ==> server_args = --daemon --config=/etc/rsyncd.conf
0x4.2 编辑/etc/rsyncd.conf 并添加以下脚本信息
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
0x4.3 把密码写入调用的密码文件并赋予权限
echo zytest:zytest /home/rsync-dst.ps chmod 600 /home/rsync-dst.ps
0x4.4 通过xinetd启动rsync
/etc/rc.d/init.d/xinetd restart
0x5 主服务器上配置inosync脚本文件
0x5.1 ** ##编辑/root/inosync添加脚本代码**
#!/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
0x5.2 赋予脚本权限，设置开机启动
chmod a+x /root/inosync cp /root/inosync /etc/rc.d/init.d
0x5.3 配置调用的主脚本文件 /root/inosync.so.1
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
0x5.4 赋予inosync.so.1脚本权限，拷贝到/usr/local/bin
chmod a+x /root/inosync.so.1 cp /root/inosync.so.1 /usr/local/bin
0x5.5 把密码写入调用的密码文件并赋予权限
echo zytest /home/rsync-src.ps chmod 600 /home/rsync-src.ps
0x6 目标服务器设置inosync自动启动并开启inosync服务
chkconfig --level 3 inosync on /etc/rc.d/init.d/inosync start
0x7 测试 END
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
总结
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