How to configure the cluster environment of MySQL database?

How to configure the cluster environment of MySQL database?

Introduction:
With the development of the Internet and the continuous growth of data volume, the database has become one of the core systems necessary for every enterprise. At the same time, in order to ensure high data availability and read and write performance requirements, database cluster environments have gradually become the choice of enterprises. This article will introduce how to configure the cluster environment of MySQL database and provide corresponding code examples.

1. Environment preparation
Before configuring the cluster environment of the MySQL database, we need to ensure that the following environment preparations have been completed:

1. Install the MySQL database: Ensure that each node Installed the MySQL database and ensured that the database version is consistent.
2. Hardware resources: Ensure that each node has sufficient hardware resources, including hard disk space, memory and CPU.
3. Network connection: Ensure normal network connection so that nodes in the cluster can communicate with each other.

2. Configure Master-Slave replication

1. Create the Master node:
   Modify the MySQL configuration file my.cnf on the Master node and enable binary logs Function, open the comment binlog.ignore-db option, and set the server-id and binlog-do-db options:

   [mysqld] log-bin=mysql-bin binlog-ignore-db=mysql server-id=1 binlog-do-db=db_name

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2. Create a Slave node:
   Modify MySQL on the Slave node Configuration file my.cnf, configure the Master's IP address, server-id and relay-log options:

   [mysqld] server-id=2 relay-log=mysql-relay-bin log-slave-updates=1

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3. Start master-slave replication:
   Execute the following command on the Slave node, Establish a replication relationship between the Slave node and the Master node:

   CHANGE MASTER TO MASTER_HOST='master_ip', MASTER_USER='replication_user', MASTER_PASSWORD='replication_password', MASTER_LOG_FILE='master_log_file', MASTER_LOG_POS=master_log_pos;

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4. Verify the master-slave replication:
   Create the database and table on the Master node, and insert data. Then use the SELECT statement on the Slave node to verify whether data synchronization is successful.

3. Configure the high availability of MySQL cluster

1. Install the MySQL Group Replication plug-in:
   Install the MySQL Group Replication plug-in on each node, and Enable it. Add the following content to the MySQL configuration file my.cnf:

   [mysqld] plugin-load-add=group_replication.so group_replication_group_name="replication_group_name" group_replication_start_on_boot=ON

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2. Configure the Group Replication component:
   In the MySQL Group Replication component, you need to configure the machine role and IP address of the component. Execute the following command in the MySQL command line interface:

   SET GLOBAL group_replication_bootstrap_group=ON; START GROUP_REPLICATION; SET GLOBAL group_replication_bootstrap_group=OFF;

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3. Add a new node:
   Add a new node in the cluster, that is, add a new MySQL instance. Add the following content to the configuration file my.cnf of the new node:

   [mysqld] plugin-load-add=group_replication.so group_replication_group_name="replication_group_name" group_replication_start_on_boot=ON

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   Then execute the following command to add the new node to the cluster:

   SET GLOBAL group_replication_bootstrap_group=OFF; START GROUP_REPLICATION;

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4. Verify the cluster environment:
   Execute the following command in the MySQL command line interface to verify the cluster environment:

   SELECT * FROM performance_schema.replication_group_members;

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Conclusion:
By configuring the cluster environment of the MySQL database, higher availability and reading and writing can be provided performance. This article provides steps for configuring Master-Slave replication and configuring MySQL Cluster for high availability, along with corresponding code examples. I hope this article will help you configure the cluster environment of your MySQL database.

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