Rsync+inotify for real-time synchronization

Service side:

First, install rsync, and then edit the configuration file, if not, you can manually create

Rsync, xinetd (Rsync is better than 3.0, the algorithm is better and faster. XINETD Monitoring and Management rsync service)

/etc/rsyncd.conf

UID = www

GID = www

Use chroot = no

Max connections = 200

Timeout = 600

PID file =/var/run/rsyncd.pid

Lock file =/var/run/rsyncd.lock

Log file =/var/log/rsyncd.log

[web]

Path =/var/www/html/

Ignore errors

Read Only = no

List = no

Hosts allow = 192.168.72.0/24

Auth users = rsync

Secrets file =/etc/rsyncd.password

Edit the/etc/xinetd.d/rsync configuration (if you can not manually write it yourself)

Cat/etc/xinetd.d/rsync

Service rsync

{

Disable = No

Socket_type = stream

Wait= No

User= root

Server= /usr/bin/rsync

Server_args=--daemon

Log_on_failure+ = USERID

}

Change Yes to No

Useradd-r rsync (user specified in the configuration file, if not, manually add a system user)

Systemctl Restart Xinetd.service

To see if the port is started (default 873)

lsof-i:873

COMMAND PID USER FD TYPE DEVICE size/off NODE NAME

xinetd 6830 root 5u IPv6 53674 0t0 TCP *:rsync (LISTEN)

Second, modify the permissions

Chown-r www:/var/www/html/www.rsync-server.com/

LL-DH www.rsync-server.com/

Drwxr-xr-x. 2 www. www. 06:42 www.rsync-server.com/

Create a user authentication file (manually created yourself)

echo "Rsync:password" >/etc/rsyncd.password

Modify authentication file permissions for security reasons

chmod 600/etc/rsyncd.password

Client:

Here only needs the password, does not need the user, lest wants to synchronize, also must carry on the manual interaction, the permission is equal to 600

echo "Password" >/etc/rsyncd.password

chmod 600/etc/rsyncd.password

Execute command

RSYNC-VZRTOPG--delete [Email protected]::web/var/www/html/www.rsync-server.com/--password-file=/etc/ Rsyncd.password

650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M00/8A/1F/wKioL1goWuuwWhnhAAAkl3Kbw5g301.png "title=" Rsync.png "alt=" Wkiol1gowuuwwhnhaaakl3kbw5g301.png "/>

Third, the service-side installation INotify

TAR-XVF inotify-tools-3.13.tar.gz

CD inotify-tools-3.13

./configure

Make-j $CPU

Make install

modifying kernel parameters

sysctl-a | grep inotify

Fs. inotify. max_queued_events = 16384 indicates the Monitoring event queue

Fs. inotify. max_user_instances = Max indicates the maximum number of monitored instances

Fs. inotify. max_user_watches = 900000 Indicates the maximum number of monitored files per instance

sysctl-a | grep inotify >>/etc/sysctl.conf written into system files

Sysctl-p re-read configuration

INotify Common parameters and configuration

Inotifywait-h

-E is used to specify which events to monitor

These events include: Create Creation, move movement, delete Delete, modify modify file contents, attrib property changes.

-m means continuous monitoring

-R means recursive entire directory

-Q means simplifying output information

INOTIFYWAIT-MRQ-E Create,move,delete,modify/path/filename return to the card will not move, and then in the other terminal to/path/filename directory read, write, change, delete the action, Will trigger its mechanism.

Write a script that lets it monitor the action.

Cat rsync+inotify.sh

#!/usr/bin/bash

INOTIFYWAIT-MRQ-E create,move,delete,modify/var/www/html/www.rsync-server.com/| While Read DNF

Do

RSYNC-VZRTOPG--delete/var/www/html/www.rsync-server.com/[Email protected]::rsync-client--password-file=/etc/ Rsyncd.shadow

Done

chmod 600/etc/rsyncd.shadow (must be 600 or less permission, otherwise it will be an error)

Error:password file must not being other-accessible

Client Configuration Rsync

Useradd-r www synchronization file owner user

Useradd-r rsync Certified Users

echo "RSYNC:RSYNC-PASSWD" >/etc/rsync.pass user, password

Cat/etc/rsyncd.password Password Authentication File The rsync command is used at the same time

rsync:rsync-passwd

Mkdir/var/www/html/www.rsync-server.com-p Creating a directory for synchronization service-side synchronization to clients

Chown-r www:/var/www/html/www.rsync-server.com/www.rsync-server.com/

Rsync configuration

Cat/etc/rsyncd.conf

UID = www

GID = www

Use chroot = no

Max connections = 200

Timeout = 600

PID file =/var/run/rsyncd.pid

Lock file =/var/run/rsyncd.lock

Log file =/var/log/rsyncd.log

[Rsync-client]

Path =/var/www/html/www.rsync-server.com

Ignore errors

Read Only = no

List = no

Hosts allow = 192.168.72.0/24

Auth users = rsync

Secrets file =/etc/rsyncd.password

XINETD Configuration

Cat/etc/xinetd.d/rsync

Service rsync

{

Disable = No

Socket_type = stream

Wait= No

User= root

Server= /usr/bin/rsync

Server_args=--daemon

Log_on_failure+ = USERID

}

Systemctl Restart xinetd

Cat/etc/rsyncd.shadow

rsync-passwd

Viewing port-enabled status

lsof-i:873

COMMAND PID USER FD TYPE DEVICE size/off NODE NAME

xinetd 6469 root 5u IPv6 52078 0t0 TCP *:rsync (LISTEN)

Server Run Script

nohup./rsync+inotify.sh & Create, modify, or delete files in/var/www/html/www.rsync-server.com/directory, when viewed by the client Also automatically creates, modifies, or deletes files as the server does

This article is from the "Silence" blog, make sure to keep this source http://silencezone.blog.51cto.com/3613477/1872445

Rsync+inotify for real-time synchronization