mysql主从双向备份

iptables -L
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -A INPUT -p tcp -m tcp --sport 3306 -j ACCEPT
iptables -A OUTPUT -p tcp -m tcp --dport 3306 -j ACCEPT

iptables-save 

/etc/init.d/mysql restart

iptables-save > /etc/iptables.up.rules
iptables-restore < /etc/iptables.up.rules 


改变
#binlog_do_db           = kuaidi
binlog_ignore_db        = phpmyadmin
binlog_ignore_db        = mysql
replicate-do-db=kuaidi


show master status\G

mysql -u root -p

在从服务器上设置主服务器信息：
CHANGE MASTER TO 
       MASTER_HOST='122.114.232.157', 
       MASTER_USER='slave', 
       MASTER_PASSWORD='******', 
       MASTER_LOG_FILE='mysql-bin.000022', 
       MASTER_LOG_POS=167794;

start slave;