Shulou(Shulou.com)06/02 Report--

This article mainly shows you how Linux through Rsync+Inotify to achieve this, remote data real-time synchronization function, the content is simple and easy to understand, I hope you can learn, after learning will definitely have a harvest, let Xiaobian take you to see it.

0x0 Test environment

Headquarters production server and branch backup server require remote data backup, the environment is as follows

**centos 6.5**

The requested URL/home/zytest/files was not found on this server.

Backup server directory: /home/zytest/files

User/Password: zytest / zytest

0x1 Production server environment setup

0x1.1 Install gcc compiler and rsync

yum install gcc rsync -y

0x1.2 Copy inotify to server and extract

cd /root

tar xfvz inotify-tools-3.13.tar.gz

0x1.3 Enter inotify directory installation

cd inotify-tools-3.13 ./ configure make make install /usr/local/bin/inotifywait ##Check if installation succeeded

0x2 Backup server environment setup

0x2.1 Install xinetd and rsync

yum install xinetd rsync -y

0x3 The following contents are operated synchronously by two servers

useradd -u 600 zytest passwd zytest zytest su - zytest -c 'mkdir /home/zytest/files' ##Create synchronization directory

0x4 Configure rsyncd on backup server

0x4.1 Edit/etc/xinetd.d/rsync Modify as follows

disable = yes ==> disable = noflags = IPv6 ==> flags = IPv4server_args = --daemon ==> server_args = --daemon --config=/etc/rsyncd.conf

0x4.2 Edit/etc/rsyncd.conf and add the following script information

uid = rootgid = rootuse chroot = nomax connections = 1000strict mode = yesport = 873pid 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/zytestignore errorsauth users =zytestsecrets file = /home/rsync-dst.psread only = nolist = false

Ps: rsyncd configuration file is on xinetd, so backup server installs xinetd

0x4.3 Write the password to the invoked password file and grant permissions

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

0x4.4 Start rsync via xinetd

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

0x5 Configure inosync script file on primary server

0x5.1 ** ##Edit/root/inosync Add script code **

#!/ bin/sh#chkconfig: 3 78 10#This file exist from compileif [ ! -f /usr/local/bin/inotifywait ]then echo "cannot start. file inotifywait NOT exist! " exitfi#This file is runnable shell scriptif [ ! -f /usr/local/bin/inosync.so.1 ]then echo "contact administrator. inosync.so.1 NOT exist! " exitficase "$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 Grant script permission, set boot boot

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

0x5.3 Main script file for configuration calls/root/inosync.so.1

rhost=** Backup Server IP**user=zytestsrc=/home/zytest/filesdst=zytest#dst corresponding to [zytest] in file /etc/rsyncd.conf on dst serverlog=/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 followed by spaces %f and %e followed by spaces

0x5.4 Give inosync.so.1 script permissions and copy to/usr/local/bin

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

0x5.5 Write the password to the invoked password file and grant permissions

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

0x6 Target Server Settings inosync Autostart and enable inosync service

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

0x7 TEST END

Create files and folders in the production server/home/zytest/files directory and see if the backup storage synchronizes the files and folders as well. Synchronization is successful.

The process can be viewed through logs

tail -f/root/inosync.log The above is about how Linux realizes real-time synchronization of local and remote data through Rsync+Inotify. If you have learned knowledge or skills, you can share it for more people to see.

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