In Centos, Rsync is configured in real-time with Inotify (used when the data volume is small)

Configure Rsync first, as mentioned in the previous section.

Inotify

Install and configure the inotify service

Build the inotify service on 8.8.8.110

1. Download and install

The code is as follows:	Copy code
Wget http://nchc.dl.sourceforge.net/project/inotify-tools/inotify-tools/3.13/inotify-tools-3.13.tar.gz Tar xzvf inotify-tools-3.13.tar.gz Cd inotify-tools-3.13 ./Configure -- prefix =/usr/local/inotify Make Make install

2. Create an inotify_rsync.sh script

(It is best to create a file directly on the server. The. sh file created on windows may not be executed and the conversion format needs to be modified.
Solution:
Vi filename
Run the following command:
: Set ff? # You can see the dos or unix words. If it is in dos format
Then use
: Set ff = unix # force it to unix format, and then save the disk and exit.
Run the script again .)

The code is as follows:

Copy code

Vi inotify_rsync.sh The following is the script content --------------------------------------- #! /Bin/sh # Date: # Function: rysnc 8.8.8.110 to 8.8.8.111 If [! -F/etc/passwd.txt]; then Echo "mypassword">/etc/passwd.txt /Bin/chmod 600/etc/passwd.txt Fi Log =/opt/logs/rsync. log Src = "/home/DemoRoot/Uploads /" Host = "8.8.8.111" Module = "home_www" /Usr/local/inotify/bin/inotifywait-mr -- timefmt '% d/% m/% y % H: % M' -- format' % T % w % F'-e close_write, modify, delete, create, attrib $ src | while read date dir file; do FILECHANGE =$ {DIR }$ {FILE} /Usr/bin/rsync-avH -- delete -- progress -- password-file =/etc/passwd.txt $ src root @ $ host ::$ module & Echo "At $ {TIME} on $ {DATE}, file $ FILECHANGE was backed up via rsync" >>$ log Done

Script Ended ------------------------------------------------
The related annotations are as follows:
/Usr/local/bin/inotifywait-mrq-e modify, delete, create, attrib $ {src}
-M: Keep Listening
-R is used to recursively View directories.
-Q indicates the output event.

-E close_write, modify, delete, create, and attrib are the "listening for creating a mobile delete write permission" event.
/Usr/bin/rsync-avH -- delete -- progress -- password-file
-A Archive mode
-H save the hard connection
-Delete: delete unnecessary files.
-- Password-file: password file
The parameter can be man rsync

When synchronizing a directory, add the -- exculde = PATTERN parameter to rsync. Note that the path is relative. For details, see man rsync.
To exclude the processing of event listening in a directory, add the -- exclude or -- excludei parameter for inotifywait. For details, see man inotifywait.
-- Exclude-from = "/usr/local/inotify/logs/rules.txt:
For example, exclude files including. svn:
# Cat/usr/local/inotify/logs/rules.txt
-*. Svn *

The inotifywait command generates three return values: "date, time, and file", which are passed as parameters to read, therefore, the "while read d e f" statement in the script details the return value.

Grant the script executable permission
Chmod-R 755 inotify_rsync.sh
Run
Nohup/opt/inotify_rsync.sh &
Display process List
Ps-ef | grep inotify_rsync
Show Logs
Tail-f/opt/logs/rsync. log