MySQL8.0轻松完成GTID主主复制

前言

之前文章介绍了GTID主从复制,实现了一主多从的MySQL架构,今天我们来介绍一下主主复制的架构。

原理:主主复制就是根据主从复制的原理,将两个主库设置互为主从即可。

变化在这两个主库的基础上,还可以搭建双主多从架构。

MySQL8.0轻松完成GTID主主复制_第1张图片

下面介绍在安装好MySQL8的centos8虚拟机上,实现GTID主主复制,以及双主多从复制的过程:

虚拟机列表:

Master1:   192.168.25.149
Master2:   192.168.25.150
Slave1:    192.168.25.152
Slave2:    192.168.25.153

一、Master1配置

1.1 删除auto.cnf,重启自动生成server-uuid

rm -f /var/lib/mysql/auto.cnf    
# 复制的虚拟机镜像,UUID会重复

1.2 设置server-id,打开GTIT

vim /etc/my.cnf
# 添加
[mysqld]
server-id=1
gtid_mode=on
enforce-gtid-consistency=true

1.3 重启MySQL

systemctl restart mysqld.service

1.4 登录mysql,添加用于同步的数据库账号

mysql> create user 'kunlun'@'%' identified by '123456';
mysql> grant replication slave on *.*  to 'kunlun'@'%';
mysql> flush privileges;

二、Master2配置

2.1 删除auto.cnf,重启自动生成server-uuid

rm -f /var/lib/mysql/auto.cnf   
# 复制的虚拟机镜像,UUID会重复

2.2 设置server-id,打开GTID

vim /etc/my.cnf
# 添加
[mysqld]
server-id=2
gtid_mode=on
enforce-gtid-consistency=true

2.3 重启MySQL

systemctl restart mysqld.service

2.4 登录mysql,添加用于同步的数据库账号

mysql> create user 'kunlun'@'%' identified by '123456';
mysql> grant replication slave on *.*  to 'kunlun'@'%';
mysql> flush privileges;

三、Master1启动主从复制

3.1 登录MySQL,配置主从同步

mysql> change master to 
master_host='192.168.25.150',    # Master2的IP
master_port=3306,          #默认端口
master_user='kunlun',        # Master2创建的账户
master_password='123456',      #密码
master_auto_position = 1;

3.2 启动从库服务

mysql> start slave;

3.3 查看状态

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for source to send event
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

四、Master2启动主从复制

4.1 登录MySQL,配置主从同步

mysql> change master to 
master_host='192.168.25.149',    # Master1的IP
master_port=3306,          #默认端口
master_user='kunlun',        # Master1创建的账户
master_password='123456',      #密码
master_auto_position = 1;

4.2 启动从库服务

mysql> start slave;

4.3 查看状态

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for source to send event
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

 

至此,互为主从复制的GTID主主复制已经搭建成功,下面再为两个Master各搭建一个从库。

五、Slave1配置,并启动主从复制

5.1 删除auto.cnf,重启自动生成server-uuid

rm -f /var/lib/mysql/auto.cnf     
# 复制的虚拟机镜像,UUID会重复

5.2 设置server-id

vim /etc/my.cnf
# 添加
[mysqld]
server-id=3
gtid_mode=on
enforce-gtid-consistency=true

5.3 重启MySQL

systemctl restart mysqld.service

5.4 登录mysql,配置主从同步

mysql> change master to 
master_host='192.168.25.149',    # Master1的IP
master_port=3306,          # 默认端口
master_user='kunlun',        # Master1创建的账户
master_password='123456',      # 密码
master_auto_position = 1;

5.5 启动从库服务

mysql>start slave;

5.6 查看状态

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for source to send event
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

六、Slave2配置,并启动主从复制

6.1 删除auto.cnf,重启自动生成server-uuid

rm -f /var/lib/mysql/auto.cnf     
# 复制的虚拟机镜像,UUID会重复

6.2 设置server-id

vim /etc/my.cnf
# 添加
[mysqld]
server-id=4
gtid_mode=on
enforce-gtid-consistency=true

6.3 重启MySQL

systemctl restart mysqld.service

6.4 登录mysql,配置主从同步

mysql> change master to 
master_host='192.168.25.150',    # Master2的IP
master_port=3306,          #默认端口
master_user='kunlun',        # Master2创建的账户
master_password='123456',      #密码
master_auto_position = 1;

6.5 启动从库服务

mysql>start slave; 

6.6 查看状态

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for source to send event
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

至此,基于GTID的双主多从复制已经搭建成功

 

KunlunDB项目已开源

【GitHub:】
https://github.com/zettadb

【Gitee:】
https://gitee.com/zettadb

END

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