Introduction
In the previous article, we mentioned rsync installation and the use of some of the parameters. If you don’t understand, please read the Synchronous data Using the rsync Command Linux in this article. We learned that rsync works in three modes. The main introduction here is the server model
Server mode:
This model is based on C/S mode, in which rsync enables a daemon in the background that runs permanently on the rsync server to receive file transfer requests, so that clients can either send files to or request them from the daemon. Rsync’s server mode is ideal for use with remote central backup servers or data remote repositories.
Case
To ensure data security, the need for a remote disaster system, the site data at 3 o ‘clock in the morning every day disaster backup to a remote server, because the quantity is very big, every day can only incremental backup, backup only increase of data in the day, when the site after a failure, can be backup to restore data to a great extent.
Solution: this assumes there is A, B two Linux system, A system as A web server, B system as A system of remote disaster backup machine, thus A system is rsyncd server, B system is as A system of remote disaster backup, need to install it in A and B system software, in this way, the rsync daemon running on A system, and can through the system in B daemon crontab to specified by A system backup data regularly, so as to realize the data remote disaster.
System environment
Two virtual machines and Install rsync
server: 172.16.6.116
client: 172.16.6.117
Rsync service configuration
We first need to create rsync’s configuration directory and the necessary configuration files.
Create a profile if none exists
touch /etc/rsyncd.conf
man rsyncd.conf to check the instructions
man rsyncd.conf
Editor configuration file Add content
[root@localhost ~]# vim /etc/rsyncd.conf uid = rsync gid = rsync fake super = yes use chroot = no max connections = 2000 timeout = 600 pid file = /var/run/rsyncd.pid lock file = /var/run/rsync.lock log file = /var/log/rsyncd.log ignore errors read only = false list = false hosts allow = 0.0.0.0/0 auth users = rsync_backup secrets file = /etc/rsync.passwd [backup] comment = welcome to xiyuxingxia backup! path = /backup/
- Add user rsync service users, manage local directory
[root@localhost ~]# useradd -s /sbin/nologin -M rsync [root@localhost ~]# id rsync
Configure the remote connected account
Create a password file
echo "rsync_backup:kobe" > /etc/rsync.passwd (Rsync_backup for remote user kobe for password rsync.passwd for password configuration file)
Set permissions for the password file
[root@localhost etc]# chmod 600 /etc/rsync.passwd [root@localhost etc]# ll /etc/rsync.passwd
Create a Shared directory and authorize rsync as the user service manager
[root@localhost ~]# mkdir -p /backup [root@localhost ~]# chown -R rsync.rsync /backup [root@localhost ~]# ll /backup
Start the rsync service and check
[root@localhost ~]# systemctl start rsyncd [root@localhost ~]# systemctl status rsyncd
Configuration complete! Congratulations! After the above operation, a backup server is set up under Linux!!!
Client configuration
Generate the password file needed to connect to the server
[root@localhost ~]# echo "kobe" >/etc/rsync.passwd
Set permissions for the password file
[root@localhost ~]# chmod 600 /etc/rsync.passwd
Create a directory for local backups
[root@localhost ~]# mkdir -p /backup
Push the contents of the client backup to the backup server
rsync -avz /backup/ [email protected]::backup/ --password-file=/etc/rsync.passwd
Pull content from the server to the client
[root@localhost backup]# rsync -avz [email protected]::backup/ /backup/ --password-file=/etc/rsync.passwd
So, enjoy it.
