[mysqld]
server-id        = 1 
log_bin         = /var/log/mysql/mariadb-bin 
log_bin_index      = /var/log/mysql/mariadb-bin.index 
binlog-do-db        = tudou1 #需要同步的数据库,这里同步tudou1和tudou2两个数据库 
binlog-do-db        = tudou2 
binlog-ignore-db     = mysql #忽略同步的数据库 
log_slave_updates               #把从库的写操作记录到binlog中 （缺少之后，双主创建失败） 
expire_logs_days  = 365         #日志文件过期天数，默认是 0，表示不过期 
auto_increment_increment= 2       #设定为主服务器的数量，防止auto_increment字段重复 
auto_increment_offset  = 1       #自增长字段的初始值，在多台master环境下，不会出现自增长ID重复

[mysqld]
[mysqld]
server-id        = 2 
log_bin         = /var/log/mysql/mariadb-bin 
log_bin_index      = /var/log/mysql/mariadb-bin.index 
binlog-do-db      = tudou1 #需要同步的数据库,这里同步tudou1和tudou2两个数据库 
binlog-do-db      = tudou2 
binlog-ignore-db     = mysql #忽略同步的数据库 
log_slave_updates               #把从库的写操作记录到binlog中 （缺少之后，双主创建失败） 
expire_logs_days  = 365         #日志文件过期天数，默认是 0，表示不过期 
auto_increment_increment= 2       #设定为主服务器的数量，防止auto_increment字段重复 
auto_increment_offset  = 2       #自增长字段的初始值，在多台master环境下，不会出现自增长ID重复

// 服务器 1

GRANT REPLICATION SLAVE ON *.* TO 'repuser'@'server-2' IDENTIFIED BY 'repuser'; 
FLUSH PRIVILEGES;

// 服务器 2
GRANT REPLICATION SLAVE ON *.* TO 'repuser'@'server-1' IDENTIFIED BY 'repuser'; 
FLUSH PRIVILEGES;

MariaDB [mysql]> show master status; 
+--------------------+----------+--------------+------------------+
| File        | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+--------------------+----------+--------------+------------------+
| mariadb-bin.000514 |   639 | xxxxxxxx   | mysql      |
+--------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

MariaDB [mysql]> show master status; 
+--------------------+----------+--------------+------------------+
| File        | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+--------------------+----------+--------------+------------------+
| mariadb-bin.000006 |   1057 | xxxxxxxx   | mysql      |
+--------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

// 服务器 2

MariaDB [mysql]> CHANGE MASTER TO MASTER_HOST='server-1',MASTER_PORT=3306,MASTER_USER='repuser',MASTER_PASSWORD='repuser',MASTER_LOG_FILE='mariadb-bin.000514',MASTER_LOG_POS=639;

MariaDB [mysql]> START SLAVE;

// 服务器 1

MariaDB [mysql]> CHANGE MASTER TO MASTER_HOST='server-2',MASTER_PORT=3306,MASTER_USER='repuser',MASTER_PASSWORD='repuser',MASTER_LOG_FILE='mariadb-bin.000006',MASTER_LOG_POS=1057;

MariaDB [mysql]> START SLAVE;

// 完毕之后，分别执行

MariaDB [mysql]> SHOW SLAVE STATUS\G

Slave_IO_Running: Yes
      Slave_SQL_Running: Yes