Mysql8.0 主从复制

Posted 2021-04-04 DevOps架构实战

两台服务器安装数据mysql8.0(安装操作请查看)

192.168.210.85   Mysql主

192.168.210.177 Mysql从

一、MySQL主从复制配置

1、mysql,开启二进制日志

2、在主服务器上授权，从服务器保存授权的信息

mysql> CREATE USER 'repl'@'192.168.210.177' IDENTIFIED by’123456’;

mysql> select user,host from mysql.user;

+------------------+-----------------+

| user             | host            |

+------------------+-----------------+

| repl             | 192.168.210.177 |

| mysql.infoschema | localhost       |

| mysql.session    | localhost       |

| mysql.sys        | localhost       |

| root             | localhost       |

+------------------+-----------------+

5 rows in set (0.00 sec)

mysql> grant replication slave on *.* to 'repl'@'192.168.210.177';

mysql> flush privileges;

Query OK, 0 rows affected (0.01 sec)

mysql> show master status;

3、Mysql从服务器

mysql> CHANGE MASTER TO

MASTER_HOST='192.168.210.85',

MASTER_USER='repl',

MASTER_PASSWORD='123456',

MASTER_LOG_FILE='mysql-bin.000003',

MASTER_LOG_POS=586;

mysql> start slave;

报错1在从库上操作：

(1)先停止从库

mysql> stop slave;

Query OK, 0 rows affected (0.02 sec)

(2)重新设置从节点的连接参数

mysql> CHANGE MASTER TO

    -> MASTER_HOST='192.168.210.85',

    -> MASTER_USER='repl',

    -> MASTER_PASSWORD='123456',

    -> MASTER_LOG_FILE='mysql-bin.000003',

    -> MASTER_LOG_POS=586;

mysql> show slave statusG;

(3) mysql> start slave;

Query OK, 0 rows affected (0.04 sec)

4、验证主从同步：

(1)主服务器创建库

mysql> create database mzl;

Query OK, 1 row affected (0.00 sec)

(2)从服务器是否同步

验证完成主从同步正常

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