MySQL主从同步最佳实践

#!/bin/bash

export master_ip=192.168.7.206

export slave_ip=192.168.7.207

export root_passwd=123456

 

echo '#1.取master主机ip的后三位作为master的server_id'

export master_server_id=`echo $master_ip |awk -F . '{print $4}'`

 

echo '#2.取slave主机ip的后三位作为slave的server_id'

export slave_server_id=`echo $slave_ip |awk -F . '{print $4}'`

 

echo '#3.取出master主库的postion'

postion_num=$(ssh -Tq $master_ip <<eof

mysql -uroot   -e 'show master status\G' 2>/dev/null|grep Position |cut -f2 -d :

--#mysql -uroot -p123456  -h$master_ip  -e 'show master status\G' 2>/dev/null|grep Position |cut -f2 -d :

eof

)

 

echo '#4.取出master主库的log_name'

log_name=$(ssh -Tq $master_ip <<eof

mysql -uroot -p123456  -e 'show master status\G' 2>/dev/null|grep File |cut -f2 -d :

eof

)

 

echo '#5.事先修改master主库的server_id'

echo $master_server_id

#ssh  ${master_ip} <<EOF

mysql -uroot -h$master_ip  <<eof

--#set global server_id=echo $master_ip | cut -b 11,12,13

set global server_id=$master_server_id;

eof

service mysql restart

 

echo '#6.事先修改slave从库的server_id'

echo $slave_server_id

mysql -uroot -h$slave_ip  <<eof

set global server_id=$slave_server_id;

eof

 

echo '#7.slave库设置密码和配置'

#ssh -Tq `${slave_ip}` <<EOF

mysql -uroot -h192.168.7.207  <<eof

use mysql;

stop slave;

select sysdate();

flush privileges;

#set password = password("${root_passwd}");

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '${root_passwd}';

GRANT ALL PRIVILEGES ON *.* TO 'root'@localhost IDENTIFIED BY '${root_passwd}';

--#change master to master_host='192.168.7.206',master_port=3309,master_user='root',master_password='123456', master_log_file='bin.000017',master_log_pos=8888;

--#change master to master_host='192.168.7.206',master_port=3309,master_user='root',master_password='123456', master_log_file='${log_name}',master_log_pos=${postion_num};

flush privileges;

eof

 

echo '#8.slave库做chang master 操作'

ssh -Tq $master_ip <<EOF

service mysql restart

EOF

 

ssh -Tq $slave_ip <<EOF

service mysql restart

EOF

 

export master_ip=192.168.7.206

export slave_ip=192.168.7.207

 

echo '#3.取出master主库的postion'

postion_num=$(ssh -Tq $master_ip <<eof

--#mysql -uroot   -e 'show master status\G' 2>/dev/null|grep Position |cut -f2 -d :

mysql -uroot -p123456  -h$master_ip  -e 'show master status\G' 2>/dev/null|grep Position |cut -f2 -d :

eof

)

 

echo '#4.取出master主库的log_name'

log_name=$(ssh -Tq $master_ip <<eof

mysql -uroot -p123456  -e 'show master status\G' 2>/dev/null|grep File |cut -f2 -d :

eof

)

echo $postion_num

echo $log_name

mysql -uroot -h192.168.7.207  <<eof

 

--#change master to master_host='192.168.7.206',master_port=3309,master_user='root',master_password='123456', master_log_file='bin.000017',master_log_pos=8888;

change master to master_host='${master_ip}',master_port=3309,master_user='root',master_password='123456',master_log_file='${log_name}',master_log_pos=${postion_num};;

 

 

start slave;

select sysdate();

eof

exit;