配置Mysql主从服务实现实例

### 配置主数据库  my.cnf

server-id=1
log-bin=master-bin
log-bin-index=master-bin.index

### 在主数据库上创建同步账号

create user backup;
GRANT REPLICATION SLAVE ON *.* TO 'backup'@'192.168.%.%' IDENTIFIED BY 'mysql';

### 配置从数据库  my.cnf

server-id=2
relay-log-index=slave-relay-bin.index
relay- log=slave-relay-bin

### 重启mysql服务

service mysqld restart

### 连接Master服务

change master to master_host='192.168.91.128',
master_port=3306,master_user='backup',master_password='mysql',
master_log_file='master-bin.000001',master_log_pos=0;

### 启动slave服务

start slave;

### 查看Master服务状态

SHOW MASTER STATUS;

### 查看Slave服务状态

SHOW slave STATUS \G;

### 检查server_id是否一样,需要不一样

show variables like 'server_id';

常见错误

错误: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.

解决方式: 检查data目录中的auto.cnf中的server-uuid=******************** 是否一样的,要改为不一样