How to configure highly available data synchronization on Linux

How to configure high-availability data synchronization on Linux

Abstract: High-availability data synchronization is crucial for enterprises. This article will introduce how to configure high-availability data synchronization on a Linux system and provide corresponding code examples.

Introduction:
In today's information age, data has become an important resource for the survival and development of enterprises. In order to ensure data security and availability, high-availability data synchronization solutions have become a must-have configuration for enterprises. Linux system is one of the widely used operating systems. This article will introduce how to configure high-availability data synchronization on Linux and provide corresponding code examples.

1. Confirm requirements
Before starting to configure high-availability data synchronization, you first need to confirm the actual requirements. Consider the following aspects:

1. Frequency of data synchronization: Is it real-time synchronization or periodic synchronization?
2. Size and quantity of data: Determine the amount of data that needs to be synchronized and consider storage requirements.
3. The goal of data synchronization: Is it to be synchronized to one remote server or to multiple servers?
4. Fault tolerance and disaster recovery: Consider fault tolerance and disaster recovery mechanisms during the data synchronization process.

2. Select data synchronization tools
There are many data synchronization tools available on Linux systems, such as rsync, rsnapshot, Lsyncd, etc. Choose appropriate tools based on actual needs. The following uses rsync as an example to introduce how to configure high-availability data synchronization.

1. Install rsync:
   Install rsync on the source and target servers:

   $ sudo apt-get install rsync

2. Configure the rsync server:
   On the source Create the rsync configuration file /etc/rsyncd.conf on the server and edit the following content:

   uid = nobody
   gid = nobody
   max connections = 10
   use chroot = yes
   read only = no
   timeout = 300
   [backup]
   path = /data/backup
   comment = Backup directory
   auth users = backup_user
   secrets file = /etc/rsyncd.secrets

   In the above configuration, /data/backup is used as the source server The backup directory, backup_user is the user name to access the directory. It should be noted that for security reasons, you should ensure that the permissions of the /etc/rsyncd.secrets file are read-only.

3. Create rsync user:
   Create rsync user on the source server, execute the following command:

   $ sudo adduser backup_user

   Then set the password for the user:

   $ sudo passwd backup_user

4. Create the /etc/rsyncd.secrets file:
   Create the /etc/rsyncd.secrets file on the source server and enter the username and password:

   backup_user:password

   Then modify the permissions of the /etc/rsyncd.secrets file:

   $ sudo chmod 600 /etc/rsyncd.secrets

5. Start the rsync server:
   Start on the source server rsync server:

   $ sudo systemctl start rsync

6. Configure rsync client:
   Create the rsync configuration file /etc/rsyncd.conf on the target server, edit the following content:

   uid = nobody
   gid = nobody
   max connections = 10
   use chroot = yes
   read only = yes
   timeout = 300
   [backup]
   path = /data/backup
   comment = Backup directory
   auth users = backup_user
   secrets file = /etc/rsyncd.secrets

   You also need to create the /etc/rsyncd.secrets file and the backup_user user. The steps are the same as the source server.

7. Start the rsync client:
   Start the rsync client on the target server:

   $ sudo systemctl start rsync

8. Synchronize data:
   On the target Execute the following command on the server to synchronize the data on the source server to the target server:

   $ rsync -avz backup_user@source_server::backup /data/

   Among them, source_server is the address of the source server, backup is the address of the rsync server Specify the module name, /data/ is the directory where the target server receives data.

Summary:
Highly available data synchronization is an important link for enterprises to ensure data security and availability. This article provides detailed steps for configuring high-availability data synchronization through the rsync tool to achieve safe backup and synchronization of data on Linux systems. I hope this article will help you configure high-availability data synchronization on Linux.

References:

1. Rsync official website: https://rsync.samba.org/
2. Rsync documentation: https://linux.die.net /man/1/rsync

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