MySQL 8.X 主从配置

Desc

✏️ 本文以基于GTID的复制示例

GTID(Global Transaction ID)是对于一个已提交事务的唯一编号，并且是一个全局(主从复制)唯一的编号。

它的官方定义如下：

GTID = source_id ：transaction_id

7E11FA47-31CA-19E1-9E56-C43AA21293967:29

什么是sever_uuid，和Server-id 区别？

核心特性: 全局唯一,具备幂等性

GTID核心参数

重要参数：

gtid-mode=on --启用gtid类型，否则就是普通的复制架构

enforce-gtid-consistency=true --强制GTID的一致性

log-slave-updates=1 --slave更新是否记入日志

MySQL 8.x版本安装参考

Master端配置

✏️ 1.编辑配置文件

# vim /etc/my.cnf[mysqld]datadir=/data/mysqlsocket=/var/lib/mysql/mysql.socklog-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pidport=3306server-id=100gtid-mode=on #启用gtid类型，否则就是普通的复制架构log-slave-updates #slave更新是否记入日志enforce-gtid-consistency #强制GTID的一致性log_bin=/data/mysql/mybinlogmax_connections=1000

✏️ 2.创建主从复制专用账户

# mysql -uroot -pNewPass#123mysql> create user 'slave'@'192.168.3.%' identified with mysql_native_password by 'Mslave#q818';Query OK, 0 rows affected (2.23 sec)mysql> grant replication slave on *.* to 'slave'@'192.168.3.%';Query OK, 0 rows affected (0.01 sec)

✏️ ​3.查看master的日志及其偏移量

mysql> show master status;+-----------------+----------+--------------+------------------+------------------------------------------+| File   | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set      |+-----------------+----------+--------------+------------------+------------------------------------------+|mybinlog.000003 |  195 |    |     | 11cdb65b-e125-11ea-904c-fa39b0d35500:1-6 |+-----------------+----------+--------------+------------------+------------------------------------------+1 row in set (0.00 sec)

Slave端配置

✏️ 1.编辑配置文件

# vim /etc/my.cnf[mysqld]datadir=/data/mysqlsocket=/var/lib/mysql/mysql.socklog-error=/var/log/mysqld.logpid-file=/var/run/mysqld/mysqld.pidport=3306server-id=106gtid-mode=onlog-slave-updatesenforce-gtid-consistencyskip-slave-startrelay_log=/data/mysql/relay.logmax_connections=1000read-only=1

✏️ 2.进入mysql进行配置连接

mysql> change master to master_host='192.168.3.95', \  master_user='slave', \  master_password='Mslave#q818', \  master_port=3306, \  master_auto_position=1;mysql> start slave;

✏️ 3.查看slave状态

mysql> show slave status\G;*************************** 1. row ***************************    Slave_IO_State: Waiting for master to send event     Master_Host: 192.168.3.95     Master_User: slave     Master_Port: 3306    Connect_Retry: 60    Master_Log_File: mybinlog.000003   Read_Master_Log_Pos: 195    Relay_Log_File: relay.000003    Relay_Log_Pos: 407  Relay_Master_Log_File: mybinlog.000003    Slave_IO_Running: Yes   Slave_SQL_Running: Yes    Replicate_Do_DB:   Replicate_Ignore_DB:   Replicate_Do_Table:  Replicate_Ignore_Table:  Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table:     Last_Errno: 0     Last_Error:     Skip_Counter: 0   Exec_Master_Log_Pos: 195    Relay_Log_Space: 2379    Until_Condition: None    Until_Log_File:     Until_Log_Pos: 0   Master_SSL_Allowed: No   Master_SSL_CA_File:   Master_SSL_CA_Path:    Master_SSL_Cert:    Master_SSL_Cipher:    Master_SSL_Key:   Seconds_Behind_Master: 0Master_SSL_Verify_Server_Cert: No    Last_IO_Errno: 0    Last_IO_Error:    Last_SQL_Errno: 0    Last_SQL_Error: Replicate_Ignore_Server_Ids:    Master_Server_Id: 100     Master_UUID: 11cdb65b-e125-11ea-904c-fa39b0d35500    Master_Info_File: mysql.slave_master_info     SQL_Delay: 0   SQL_Remaining_Delay: NULL  Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates   Master_Retry_Count: 86400     Master_Bind:  Last_IO_Error_Timestamp:  Last_SQL_Error_Timestamp:    Master_SSL_Crl:   Master_SSL_Crlpath:   Retrieved_Gtid_Set: 11cdb65b-e125-11ea-904c-fa39b0d35500:1-6   Executed_Gtid_Set: 11cdb65b-e125-11ea-904c-fa39b0d35500:1-6,8ee47a46-e12a-11ea-a237-fa55fa771000:1    Auto_Position: 1   Replicate_Rewrite_DB:     Channel_Name:   Master_TLS_Version:  Master_public_key_path:   Get_master_public_key: 0   Network_Namespace: 1 row in set (0.00 sec)ERROR: No query specified

测试验证略

✏️ 普通主从配置参考

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