1、在主节点上/etc/my.cnf
service-id=1
在主库mysql授权backup用户的权限
grant replication slave on *.* to backup@’%’ identified by ‘password’;
在终端导出全库 为保证数据库的偏移量一致性 加入–master-data=2
mysqldump -u root –master-data=2 –all-databases > /tmp/backup.sql
grep -i “change master to” /tmp/backup.sql 记录第一行的MASTER_LOG_FILE=’mysql-bin.000006′, MASTER_LOG_POS=59583;给从库上使用
或者在主库上执行 show master status\G 也可以查看
systemctl restart mariadb
2、在从节点上/etc/my.cnf
service-id=2
然后保存文件进入从库mysql执行
CHANGE MASTER TO
MASTER_HOST=’192.168.1.2′,
MASTER_USER=’backup’,
MASTER_PASSWORD=’password’,
MASTER_LOG_FILE=’mysql-bin.000006′,
MASTER_LOG_POS=59583;
start slave;启动从库
show slave status\G 查看状态 IO和SQL都为yes就ok了
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
show variables like ‘server_id’;
set global server_id=2
show global variables like ‘%max_connect_errors%’;
set global max_connect_errors=4000; 默认是100
