Rsync remote Synchronization

Rsync remote Synchronization Service

Inotify-Tools for Real-Time Synchronization

NTP Network Time Service

 

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I. Rsync remote Synchronization Service

1. Basic operations of rsync Synchronization

 

Format: rsync source document target document

 

Common rsync options

-A: Archive mode, equivalent to-rlptgod

-V: displays detailed information about the synchronization process.

-Z: Enable compression during transmission

-H: Keep the hard connection file

-A: retain the ACL attribute information of the file.

-- Delete: delete a file with a target but no source

-- Checksum: determines whether to synchronize data based on the checksum.

2. Rsync Synchronization

(1) local synchronization of the rsync server

Create synchronization target directory

[[Email protected] ~] # Mkdir/test

[[Email protected] ~] # Rm-RF/test /*

[[Email protected] ~] # Ls/test

[[Email protected] ~] # Rsync-Az/boot // Test

[[Email protected] ~] # Ls/test

Completely synchronize and delete unnecessary files

[[Email protected] ~] # Touch/test. File

[[Email protected] ~] # Rsync-azvn/boot // test -- delete

Sending incremental file list

./

Deleting test. File

........

// Adding parameter n is the result of pre-execution, but it is not actually executed

[[Email protected] ~] # Rsync-AZV/boot // test -- delete

Sending incremental file list

./

Deleting test. File

........

// Remove parameter n and delete it synchronously. Keep the same

 

Note: If the source folder is not followed by/For example:/boot, the entire folder will be synchronized to the target folder, if/boot/is added, all contents in the folder are synchronized.

 

(2) rsync + SSH remote Synchronization

Downlink: rsync [email protected]: local directory of the source directory

Upstream: rsync local directory [email protected]: target directory

Prepare an rsync server (192.168.4.2) and a remote synchronization terminal (192.168.4.3)

Create a test directory on a remote machine

[[Email protected]/] # mkdir/test

Back up the local/etc directory to the remote host

[[Email protected] ~] # Rsync-Az/boot/[email protected]:/test

.........

[Email protected]'s password: // enter the user name and password of the remote machine

[[Email protected]/] # ls/test/

Back up the/boot/directory of the remote host to the local device.

[[Email protected]/] # rm-RF/test /*

[[Email protected]/] # rsync [email protected]:/boot // Test

[Email protected]'s password:

[[Email protected]/] # ls/test/

 

(3) rsync client <==> rsync server

 

Downlink: rsync [email protected]: Sharing name local directory

Upstream: rsync local directory [email protected]: Share Name

1) create a synchronization account file on the server

[[Email protected] ~] # Vim/etc/rsyncd_users.db

Ruser: pwd123

Othername: 123456 // user name and password required for remote user authentication

2) modify the rsync configuration file and set the synchronization directory.

[[Email protected] ~] # Vim/etc/rsyncd. conf

Gid = nobody

Use chroot = Yes

Log File =/var/log/rsyncd. Log

PID file =/var/run/rsyncd. Pin

[Tools]

Path =/usr/src // synchronization directory

Comment = rsync share test

Read Only = Yes

Dont compress = *. GZ *. bz2 *. tgz *. Zip

Auth users = ruser // ruser authentication is required to add the row. Note that the two lines indicate anonymous synchronization.

Secrets file =/etc/rsyncd_users.db // specify the file to be verified

[[Email protected] ~] # Yum-y install xinetd

[[Email protected] ~] # Chkconfig rsync on // The Rsync service is a temporary service.

[[Email protected] ~] # Service xinetd start

[[Email protected] ~] # Chkconfig xinetd on

Verify on a remote machine

 

View the server synchronization Share Name

[[Email protected]/] # rsync 192.168.4.2 ::

Tools rsyncshare Test

Or

[[Email protected]/] # rsync: // 192.168.4.2

Tools rsyncshare Test

 

View the content list of the shared name

[[Email protected]/] # [email protected]: Tools

Password: // enter the password of the shared user name

Or

[[Email protected]/] # rsyncrsync: // [email protected]/tools

Password:

 

Remote Synchronization

[[Email protected]/] # rm-RF/test /*

[[Email protected]/] # rsync-azrsync: // [email protected]/tools // Test

Password:

[[Email protected]/] # ls/test/

Debug kernels

 

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Ii. Rsync real-time synchronization (inotify monitoring and triggering)

1. Install inotify-tools software package

[[Email protected] ~] # Tar zxfinotify-tools-3.13.tar.gz

[[Email protected] ~] # Cd inotify-tools-3.13

[[Email protected] inotify-tools-3.13] #./configure

....

[[Email protected] ~] # Make & make install

2. inotifywait tool trigger Verification

Take the monitoring/OPT directory as an example. When the documents under the/OPT Directory change, the corresponding prompt is immediately given.

[[Email protected] ~] # Inotifywait-mrq-e modify, move, create, delete, attrib/OPT

....

/Opt/create, isdir tdir1

/Opt/create file1.txt

/Opt/modify file1.txt

/Opt/delete file1.txt

 

....

3. Trigger Synchronization Based on inotifywait and while Loops

 

[[Email protected] ~] # Inotifywait-mrq-e modify, move, create, delete, attrib/opt \

| While read x y z; do rsync/opt/opt2; done

... // Make some changes to the source directory

 

[[Email protected] ~] # Ls/opt2/

... // View the Real-Time Synchronization result

 

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Iii. NTP Time Synchronization Service

 

1. Adjust the ntpd service configuration and start the service

[[Email protected] ~] # Vim/etc/NTP. conf

Restrict 192.168.4.0 mask 255.255.255.0nomodify notrap

// Allow this network segment to use this server as an NTP server

Server 127.127.1.0 // use the local machine as the NTP server

[[Email protected] ~] # Service ntpd restart

[[Email protected] ~] # Date

Tuesday, August 26, 2014 03:04:37 CST

2. test time synchronization on the client.

[[Email protected]/] # date

Wednesday, December 12, 2007 12:12:03 GMT

[[Email protected]/] # ntpdate 192.168.4.2

[[Email protected]/] # date

Monday, August 25, 2014 19:05:51 GMT

3. Add the NTP server address to the NTP. conf configuration file for automatic synchronization.

[[Email protected]/] # Vim/etc/NTP. conf

Server 192.168.4.2

[[Email protected]/] # service ntpd restart

4. Local Time Synchronization

[[Email protected]/] # hwclock // local hardware clock

Monday, June 17, August 25, 2014 seconds-0.686272 seconds

[[Email protected]/] # date 121212122007

Wednesday, December 12, 2007 12:12:00 GMT

[[Email protected]/] # hwclock -- hctosys // synchronize the hardware clock to the system clock

[[Email protected]/] # date

Monday, August 25, 2014 19:10:06 GMT

[[Email protected]/] # hwclock -- systohc // synchronize the system clock to the hardware clock

[[Email protected]/] # hwclock

 

Rsync remote Synchronization