mysql主從複製失效的恢複

mysql主從複製失效的恢複
前言:
由於修改了linux伺服器的主機名稱,所以mysql主從複製失效了,現在需要恢複主從複製.這個有點不同於純淨的庫的主從複製.
首先要把網站放一個維護頁面.要不然使用者會覺得你們網站壞掉了.
0. Lock master database table;
show master status;
flush table with read lock;
show master status;


1. Backup master database;
/usr/local/mysql/bin/mysqldump -uroot -p'a#~f`Ej+:Q?TyU8s@CaE' -S /tmp/mysql.sock -A --events -B --master-data=2 > /home/backup/mysql/kng.sql
grep MASTER /home/backup/mysql/kng.sql
show master status;


1.2 Unlock master database;
mysql> unlock tables;


2. Transfer database to slave database;
scp -r -P 3389 /home/backup/mysql/kng.sql allen@192.168.3.3:/tmp


3. recovery slave database;
mysql -uroot -p'a#~f`Ej+:Q?TyU8s@CaE' -S /tmp/mysql.sock < /home/backup/mysql/kng.sql
mysql -uroot -p'a#~f`Ej+:Q?TyU8s@CaE'
change master to master_host='192.168.3.2',master_user='remotesql',master_password='EhAhoCoevU4MR,nTsJfEo', master_log_file='mysql-bin.000183',master_log_pos=1058354975;
start slave;


4. Show slave status;
show slave status\G