MySQL配置主从

准备

• 安装MySQL

主MySQL

• 修改MySQL配置

  # vim /etc/my.cnf
  [mysqld]
  server-id=1
  log-bin=/data/mysql/bin-log/bin-log
  

• 创建同步帐户

  > GRANT REPLICATION SLAVE ON *.* to 'mysync'@'%' identified by '123456';
  

• 重启MySQL

  # /etc/init.d/mysqld restart
  

• 查询master状态

  > show master status;
   +----------------+----------+--------------+------------------+-------------------+
   | File           | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
   +----------------+----------+--------------+------------------+-------------------+
   | bin-log.000004 |      308 |              |                  |                   |
   +----------------+----------+--------------+------------------+-------------------+
   1 row in set (0.00 sec)
   
  

  记下bin-log文件名bin-log.000004和bin-log点308
  此时不要再操作主MySQL，防止状态值变化

从MySQL

• 创建所需目录

  # mkdir /data/mysql/log-relay
  

• 修改MySQL配置

  # vi /etc/my.cnf
  [mysqld]
  server-id=2
  read_only=1
  relay_log=/data/mysql/log-relay/log-relay
  

• 重启MySQL

  # /etc/init.d/mysqld restart
  

• 连接主MySQL

  > change master to master_host='10.10.10.81',master_user='mysync',master_password='123456',master_log_file='mysql-bin.000004',master_log_pos=308;
  

  master_host 主MySQL的IP
  master_user 主MySQL的同步账户
  master_password 主MySQL的同步账户密码
  master_log_file 主MySQL的bin-log文件名
  master_log_pos 主MySQL的bin-log点

• 启动复制功能

  > start slave;
  

• 检查复制功能状态

  > show slave status \G
  

  Slave_IO_Running及Slave_SQL_Running都为YES表示正常运行