mysql主从备份简单记录

 

1、修改主服务器master:
#vi /etc/my.cnf
       [mysqld]
       log-bin=mysql-bin   //[必须]启用二进制日志
       server-id=1       //[必须]服务器唯一ID，默认是1，一般取IP最后一段
2、修改从服务器slave:
   #vi /etc/my.cnf
       [mysqld]
       log-bin=mysql-bin   //[必须]启用二进制日志
       server-id=2          //[必须]服务器唯一ID，默认是1，一般取IP最后一段
3、重启两台服务器的mysql
   /etc/init.d/mysql restart
4、在主服务器上建立帐户并授权slave:
   #/usr/local/mysql/bin/mysql -uroot -p
   mysql>GRANT REPLICATION SLAVE ON *.* to 'mysql'@'%' identified by '123456'; //一般不用root帐号，“%”表示所有客户端都可能连，只要帐号，密码正确，此处可用具体客户端IP代替，如8.8.8.8，加强安全。
5、登录主服务器的mysql，查询master的状态

 show master status;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000004 |      106 |              |                  |
+------------------+----------+--------------+------------------+

   注：执行完此步骤后不要再操作主服务器MYSQL，防止主服务器状态值变化

6、配置从服务器Slave：
   mysql>change master to master_host='8.8.8.8',master_user='mysql',master_password='123456',
         master_log_file='mysql-bin.,000004',master_log_pos=106;   //注意不要断开，“308”无单引号。
Mysql>start slave;    //启动从服务器复制功能
7.增加一个检测mysql主从的脚本。
#!/bin/bashmysql_status=`netstat -nl | awk 'NR>2{if ($4 ~ /.*:3306/) {print "Yes";exit 0}}'`if [ "$mysql_status" == "Yes" ];then        slave_status=`mysql -uroot -p'' -e"show slave status\G" | grep "Running" | awk '{if ($2 != "Yes") {print "No";exit 1}}'`        if [ "$slave_status" == "No" ];then                echo "slave is not working!"                [ ! -f "/tmp/slave" ] && echo "Slave is not working!" | mail -s "Warn!MySQL Slave is not working" [email protected]                touch /tmp/slave        else                echo "slave is working."                [ -f "/tmp/slave" ] && rm -f /tmp/slave        fi        [ -f "/tmp/mysql_down" ] && rm -f /tmp/mysql_downelse        [ ! -f "/tmp/mysql_down" ] && echo "Mysql Server is down!" | mail -s "Warn!MySQL server is down!" [email protected]        touch /tmp/mysql_downfi~