MariaDB主主同步，也就是两个MariaDB之间互为主从，每个MariaDB均为主、从双角色。

1. MariaDB01配置

vi /etc/my.cnf.d/server.cnf

[mysqld]

server-id = 1

log-bin = master-log

relay-log = slave-log

auto_increment_offset = 1 

auto_increment_increment = 2

2. MariaDB02配置

vi /etc/my.cnf.d/server.cnf

[mysqld]

server-id = 2

log-bin = master-log

relay-log = slave-log

auto_increment_offset = 2 

auto_increment_increment = 2

3. 重启MariaDB服务

root用户：   sudo -u mysql service mysql restart

mysql用户：service mysql restart

4. MariaDB01主，MariaDB02从配置

MariaDB01执行：

CREATE USER 'repl'@'192.168.10.%' IDENTIFIED BY '123456';

GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.10.%';

show master status;

MariaDB02执行：

CHANGE MASTER TO MASTER_HOST='192.168.10.178', MASTER_USER='repl', MASTER_PASSWORD='123456', MASTER_LOG_FILE='master-log.000002', MASTER_LOG_POS=329;

start slave;

show slave status\G

5. MariaDB02主，MariaDB01从配置

MariaDB02执行：

CREATE USER 'repl'@'192.168.10.%' IDENTIFIED BY '123456';

GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.10.%';

show master status;

MariaDB01执行：

CHANGE MASTER TO MASTER_HOST='192.168.10.179', MASTER_USER='repl', MASTER_PASSWORD='123456', MASTER_LOG_FILE='master-log.000002', MASTER_LOG_POS=329;

start slave;

show slave status\G

至此，主主同步复制配置完成。