Linux MySQL 5.7 Master-Slave Replication Setup Guide: One Master Multiple Slaves

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1. All node configurations

Configure IP address, gateway, DNS, and hostname
Set up network-related information through appropriate configuration files or commands to ensure proper communication between all nodes.
Stop and disable the firewall

setenforce 0 systemctl stop firewalld systemctl disable firewalld

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setenforce 0
systemctl stop firewalld
systemctl disable firewalld

These commands are used to shut down SELinux and the firewall to prevent them from blocking communication between nodes.
Download required components

setenforce 0 systemctl stop firewalld systemctl disable firewalld

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setenforce 0
systemctl stop firewalld
systemctl disable firewalld

Install development tools and file transfer tools to ensure the system has the necessary development and transfer environment.

Build time-synchronized environment

Main node

Install NTP

setenforce 0 systemctl stop firewalld systemctl disable firewalld

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setenforce 0
systemctl stop firewalld
systemctl disable firewalld

Install the NTP service to ensure time synchronization.
Configure NTP

setenforce 0 systemctl stop firewalld systemctl disable firewalld

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setenforce 0
systemctl stop firewalld
systemctl disable firewalld

Add the following two lines:

setenforce 0 systemctl stop firewalld systemctl disable firewalld

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setenforce 0
systemctl stop firewalld
systemctl disable firewalld

Configure NTP service to use local time as a reference.
Restart service and set to start automatically on boot

systemctl restart ntpd <pre>systemctl enable ntpd

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systemctl restart ntpd
<pre>systemctl enable ntpd

Restart the NTP service and set it to start automatically at boot to ensure continuous operation of the time synchronization service.

From Node

Install ntpdate

yum install -y ntpdate

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yum install –y ntpdate

Install the ntpdate tool to manually synchronize time.
Synchronize Time

yum install -y ntpdate

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yum install –y ntpdate

Use NTP server IP to synchronize time. For example:

yum install -y ntpdate

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yum install –y ntpdate

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2.MySQL Database Installation

Download MySQL 5.7.29 installer package

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

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wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

Download the official MySQL installation package from the source.
Extract and create MySQL yum repository

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

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wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

Extract the installation package and create a local YUM repository.
Configure yum repository

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

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wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

Configure the local YUM repository for subsequent installation.
Refresh yum and install MySQL server

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

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wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.29-1.el7.x86_64.rpm-bundle.tar

Install the MySQL server.

Start and change default management password

[crayon-67f9d6a5deabf725806065 inline=”true”  class=”language-bash”]systemctl start mysqld
grep “password” /var/log/mysqld.log  //Get default password

1 2	[crayon–67f9d6a5deabf725806065 inline=“true” class=“language-bash”]systemctl start mysqld grep “password” /var/log/mysqld.log //Get default password

[/crayon]

Start MySQL and change the default management password.

mysqladmin –uroot –p password “Abc-1234” // Change the default password using Abc-1234

Start the MySQL service and change the default root user password.

3. Configure Traditional Replication Single Master

Master Server (master1)

Edit MySQL configuration file

vim /etc/my.cnf

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vim /etc/my.cnf

Add the following content:

vim /etc/my.cnf

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vim /etc/my.cnf

Set server ID and enable binary logging.
Restart MySQL service

vim /etc/my.cnf

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vim /etc/my.cnf

Restart the MySQL service to apply configuration changes.
Create a user with replication permissions

vim /etc/my.cnf

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vim /etc/my.cnf

Create a user for replication and grant necessary permissions.
View master server status

vim /etc/my.cnf

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vim /etc/my.cnf

Obtain binary log file and position to configure the slave server.

From Server (master2)

Edit MySQL Configuration File

vim /etc/my.cnf

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vim /etc/my.cnf

Add the following content:

vim /etc/my.cnf

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vim /etc/my.cnf

Set the slave server ID.
Restart MySQL Service

systemctl restart mysqld

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systemctl restart mysqld

Restart the MySQL service to apply configuration changes.
Connect to Master Server

mysql -u username -p

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mysql –u username –p

Configure the slave server’s replication information based on the master server status.
Start Slave Server

systemctl start mysqld

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systemctl start mysqld
Check Slave Status

mysql -u username -p

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mysql –u username –p

Check the slave server replication status to ensure successful connection and synchronization.

4. Testing Master-Slave Synchronization

Create the database and table on the master server, and insert data:

mysql> create database smqnz;
mysql> use smqnz;
mysql> create table test(age int);
mysql> insert into test values(1);
mysql> select * from test;
+——+
| age  |
+——+
|    1 |
+——+

mysql> create database smqnz;

mysql> use smqnz;

mysql> create table test(age int);

mysql> insert into test values(1);

mysql> select * from test;

+———+

| age |

+———+

| 1 |

+———+

Check if the data is synchronized on the slave server:

mysql> create database smqnz;
mysql> use smqnz;
mysql> create table test(age int);
mysql> insert into test values(1);
mysql> select * from test;
+——+
| age  |
+——+
|    1 |
+——+

mysql> create database smqnz;

mysql> use smqnz;

mysql> create table test(age int);

mysql> insert into test values(1);

mysql> select * from test;

+———+

| age |

+———+

| 1 |

+———+

The above operations ensure that the data on the master server is successfully replicated to the slave server, achieving master-slave synchronization.

Summary

Through this article’s introduction, we have successfully configured MySQL database master-slave replication on a Linux system, ensuring real-time data synchronization and backup. This not only improves data security but also provides convenience for future expansion and maintenance. We hope readers can apply the knowledge learned to further explore and optimize their own database management solutions, laying a solid foundation for more efficient business operations.

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10 responses to “Linux MySQL 5.7 Master-Slave Replication Setup Guide: One Master Multiple Slaves”

Thanks for sharing such a comprehensive guide! The tips on testing master-slave synchronization were invaluable for ensuring everything works smoothly.

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The step-by-step approach made the complex process of MySQL replication feel manageable. I’ll definitely refer back to this guide if I run into issues.

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This guide not only taught me how to set up master-slave replication but also introduced me to useful AI tools like BaoYueAI and Lingban AI.

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The part about configuring NTP was something I wasn’t sure about, but this guide clarified everything. Highly recommended!

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I appreciated the emphasis on disabling firewalls and SELinux temporarily during setup. It saved me from a lot of headaches!

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This article is perfect for Linux beginners like me. The clear instructions and commands helped me avoid common pitfalls during setup.

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The guide made me realize how important time synchronization is for database replication. I’ll make sure to set that up properly next time.

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Great resource for anyone looking to implement traditional replication in MySQL 5.7. The section on creating a replication user was particularly useful.

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Thanks to this article, I successfully configured my first MySQL master-slave setup. The tips on firewall and SELinux settings were crucial and not mentioned elsewhere!

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This guide was incredibly helpful for setting up MySQL 5.7 master-slave replication. The step-by-step instructions made it easy to follow, especially the part about time synchronization which I initially overlooked.

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