mysql主从简单架设

架设主从
 主：192.168.30.37
 从：192.168.30.45
1架设mysql服务省略
2配置主服务器
 vim /etc/my.cnf 

log-bin=mysql-bin
server-id       = 1

 

service mysqld restart

 创建用户账号

mysql> grant replication client,replication slave on *.* to 'lvsir'@'192.168.30.%' identified by 'redhat';
 mysql> flush privileges;
 mysql> flush tables with read lock; 锁表
 mysql> show master status;
 +------------------+----------+--------------+------------------+
 | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
 +------------------+----------+--------------+------------------+
 | mysql-bin.000003 |      354 |              |                  |
 +------------------+----------+--------------+------------------+

做备份

mysqldump --all-databases --single-transaction --master-data=2 > /root/all.sql（实验环境下）
mysql> unlock tables; 解锁

 3配置从服务器

  vim /etc/my.cnf

#log-bin=mysql-bin  注释从服务器的二进制功能
server-id       = 2
relayrelay_log=relay-log  启动中继功能
read_only = ON  从服务器只能以只读的方式工作

 service mysqld restart

scp 192.168.30.37:/root/all.sql /root/
mysql < all.sql 将主服务器的数据导入到从服务器的数据库中
mysql> show databases; 看是否与主服务器保持一致

 创建用户账号

mysql> grant replication client,replication slave on *.* to 'lvsir'@'192.168.30.%' identified by 'redhat';
mysql> flush privileges;

 启动复制 

mysql> change master to master_user='lvsir',master_host='192.168.30.37',master_password='redhat',master_log_file='mysql-bin.000003',master_log_pos=354;

  启动从服务器

mysql> start slave;
mysql> show slave status\G; 主要查看 Slave_IO_Running: Yes
Slave_SQL_Running: Yes这两项是否开启

4主从都配置好后可以在主服务器上创建数据库，看从服务器是否同步