mysql 主从备份

Posted 2021-03-15 love2

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1.1、环境准备

两台机器ip分别为

100.100.100.105 (主)
100.100.100.106（从）

安装 mysql

[root@centos ~]# yum install mysql-server mysql-client -y
[root@centos ~]# service mysqld start
[root@centos ~]# /usr/bin/mysqladmin -u root password '123456'

1.2、修改配置文件

100.100.100.105

[root@centos ~]# vim /etc/my.cnf
log-bin=mysql-bin
server-id=105

100.100.100.106

[root@centos ~]# vim /etc/my.cnf
log-bin=mysql-bin
server-id=106

1.3、添加mysql用户

mysql> grant replication slave on *.* to slave@'100.100.100.106' identified by '123456';

1.4、查看主服务器信息

mysql> show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000004 |      261 |              |                  |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)

1.5、登录从mysql

change master to
master_user='slave',
master_password='123456',
master_host='100.100.100.105',
master_log_file='mysql-bin.000004',
master_log_pos=261;

1.6、开启从mysql

mysql> start slave;

1.7、判断成功，可查看如下参数

mysql> show slave statusG;
            Slave_IO_Running: Yes
            Slave_SQL_Running: Yes