rsync file synchronization Comments

A. Environmental and test instructions

rsync (remote sync) data mirroring and software under unix unix-platform, it is not as required full backup FTP, rsync the change may be differential backup data, thereby reducing data traffic to improve efficiency

rsync configuration file is divided into three, namely rsyncd.conf (main profile), rsyncd.secrets (password file), rsyncd.motd (file server information)

The present document is a machine 2 will be described Liezi

pc1, IP: 192.168.0.230, as rsync server, you need to configure file rsyncd.conf

pc2, IP: 192.168.0.234, as rsync client that no rsyncd.conf configuration, the file may be empty

Creating / common directory on the server as a shared directory, copy some files into the directory test, test

yum -y install rsync #centos installed by default

mkdir /common; cp /etc/init.d/* /common/

II. The main configuration file description

vim /etc/rsyncd.conf

motd file = /etc/rsyncd.motd # Set prompt file server information, write a message in this file

Open transfer logging = yes # logging data transmission rsync

log file = /var/log/rsyncd.log # Set the log file name, the log format can be set through the log format parameters

pid file = /var/run/rsyncd.log # Set the rsync daemon number to save the file name

lock file = /var/run/rsync.lock # set the lock file name

port = 873 # server listens on port number, the default is 873

address = 192.168.0.230 # Set this server is listening network interface ip address

uid = nobody # Set account name or ID number when used for data transmission, default nobody

gid = nobody # set the group name or GID number when used for data transmission, default nobody

# If it is yes, rsync will chroot the first set, the root path is mapped in the parameter path below, the client, the root system is the path parameters specified path. But doing so requires root privileges, and only synchronizes name, does not synchronize the contents of symbolic links when synchronizing data.

use chroot = no

read only = yes # whether to allow clients to upload data, yes is not allowed

max connections = 10 # Set number of concurrent connections, 0 indicates unlimited

[Common] # custom module name, the rsync directory defined by the synchronization module, the plurality of defined

comment = web content # define string of notes

Really path = path / common # synchronize the directory specified by path

ignore errors # ignore IO errors

A directory can not synchronize data at #exclude = test / #exclude specify common directory

auth users = tom, jerry # is provided to allow connection to the server account, this account may not be present in the system user

secrets file = /etc/rysncd.secrets # password authentication file name, the file is read-only permission requirements, the proposed 600, only valid after setting auth users

hosts allow = 192.168.0.0/255.255.255.0 # which hosts the data set can be synchronized, multi-ip and separated by spaces between the segments

hosts deny = * # hosts allow addition to the host defined, reject all other

When the list = false # client request list display module, the module name is displayed, the default is true

III. Create a password file, firewall settings, the client and the server you have to do the following operation

echo “tom:123” > /etc/rsyncd.secrets

echo “jerry:123” >> /etc/rsyncd.secrets

chmod 600 /etc/rsyncd.secrets

echo "welcome to access"> /etc/rsyncd.motd # client does not need to do this

rsync --daemon # --daemon represent the background, the client does not need to open the rsync options -daemon

echo "/ usr / bin / rsync --daemon" >> /etc/rc.local # boot rsync service

firewall-cmd --permanent --add-port = 873 / tcp # add firewall rules allow access to the data port 873

IV. The client sync data

yum -y install rsync

rsync -vzrtopg --progress [email protected] :: common / test # specified through common module / files in the directory are copied to the common / test directory this client

Parameter Description

v: Show Details

z: during transmission of data compression

r: Recursive

t: retention time attribute modification

o: keep the file owner attribute

p: preserve file permissions attributes

g: file belongs to retain the property group

a: archive mode, the main preserve file attributes, equivalent to -rlptgoD

-progress: displays progress information data transmission

-password-file = FILE: Specifies the password file, the password is written to the file, to achieve non-interactive data synchronization, the file name also need to modify permissions to 600

-delete: Delete those files that exist only in the destination path (source path does not exist), data synchronization script is often coupled with this parameter

-list-only: only list server list module requires rsync server settings list = true

Five. Rsync syntax, SRC represents the source path, DEST indicate the target path

Local Copy

rsync [options] SRC ... [DEST]

Copy via remote shell

Download Data: rsync [options] [user @ a] HOST: SRC ... [DEST] # user @ without representation landed remote host to download data to a local root user's path DEST

Upload data: rsync [options] SRC ... [user @] HOST: DEST # here SRC represents local data, DEST represents the remote host directory

Copy via rsync process

Download Data

rsync [options] [user @] HOST :: SRC ... [DEST] # SRC here after the double colon indicates that the module name of the remote server-side

rsync [options] rsync: // [user @] HOST [: port] / SRC ... [DEST] # SRC here represents the actual name of the directory synchronization, this way you can specify a port

upload data

rsync [options] SRC ... [user @] HOST :: DEST # Upload local client data to a remote server DEST module name specified path

rsync [选项] SRC…rsync://[user@HOST[:port]/DEST

Some examples

rsync -t * .c 192.168.0.54:src/ # .c file to the end of the assignment to the next 192.168.0.54 src directory under the current directory of the machine
rsync -avz 192.168.0.54:src/bar / data / tmp # will be copied from the host 192.168.0.54 src / bar directory recursively to the machine / data / tmp directory
rsync -avz 192.168.0.54:src/bar/ / data / tmp # and the difference of Example 2 is away / bar created directory data / tmp directory
rsync -avz / src / foo / dest # native copy / src / foo directory to / dest directory
rsync -avz [email protected] :: common / test3 # tom accounts using the rsync daemon to connect to remote host 192.168.0.230, the path defined by a path common module downloaded to the local directory test3
rsync -avz 192.168.0.230::common / test3 # anonymous download 192.168.0.230 common server module to the local / test3 directory
rsync --list-only [email protected] :: # server 192.168.0.254 show all the module names, you need to configure the server list = true will be displayed
Connect to the server each time the client needs to enter the password a lot of trouble, you can create a password file rsync.pass, in which contains a password, and then use the -password-file Specify this file