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linux:  CentOS 5.6  
mysql:  5.6.22  
MASTER A : centos152（192.168.1.152）  
MASTER B : centos153（192.168.1.153）  


#主備都啟用：log-bin 和 relay_log
#若主主雙方都操作，最好設定auto-increment-offset 和 auto-increment-increment，以避免衝突。若只在其中一個庫操作，可不需要設定
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#master A 主伺服器配置：  
[
 
[email protected] ~]# vi /etc/my.cnf  
  
[mysqld]  
basedir =/usr/local/mysql  
datadir =/usr/local/mysql/data  
socket=/usr/local/mysql/mysql.sock  
port = 3306  
server_id = 1
log-bin= mysql-bin
relay_log=mysql-relay-bin
binlog_format = row   
binlog-ignore-db=mysql  
binlog-ignore-db=information_schema
#auto-increment-offset=1
#auto-increment-increment=2

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#master B 備伺服器配置：  
[
 
[email protected] ~]# vi /etc/my.cnf  
  
[mysqld]  
basedir =/usr/local/mysql  
datadir =/usr/local/mysql/data  
socket=/usr/local/mysql/mysql.sock  
port=3306  
server_id=2  
log-bin= mysql-bin
relay_log=mysql-relay-bin
binlog_format = row  
binlog-ignore-db=mysql  
binlog-ignore-db=information_schema
#auto-increment-offset=2
#auto-increment-increment=2

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#配置 my.cnf 後 master A 和 master B 都重啟mysqld服務  
[
 
[email protected] ~]# service mysqld restart  
  
[[email protected] ~]# service mysqld restart  


#master A ：備份資料  
[[email protected] ~]# mysqldump -uroot -p --single-transaction --events --triggers --routines --flush-logs --master-data=2 --databases test > /tmp/test.sql  


#master A ：備份遠端傳輸到伺服器153 (master B)
[[email protected] ~]# scp -r /tmp/test.sql [email protected]:/tmp   
  

#master B ：還原 資料庫 
[[email protected] ~]# mysql -u root -p test< /tmp/test.sql


#master A 和 master B 新增賬號 
mysql> grant replication slave on *.* to 'replication'@'192.168.1.%' identified by '123456';  
mysql> flush privileges;  

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#檢視備份時的日誌位置  
[[email protected] ~]# grep -i "change master" /tmp/test.sql  
-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000015', MASTER_LOG_POS=120;  



#【注：如果是新例項，可以直接檢視 show master status; 執行下面語句，不需要備份還原】
#master B 連線到 master A 
mysql> STOP SLAVE;  
mysql>     
CHANGE MASTER TO     
    MASTER_HOST='192.168.1.152',
    MASTER_PORT=3306,
    MASTER_USER='replication',     
    MASTER_PASSWORD='123456',     
    MASTER_LOG_FILE='mysql-bin.000015',     
    MASTER_LOG_POS=120;    
mysql> START SLAVE;  


#master B 檢視同步資訊：
mysql> show slave status \G;   

#若看到：Slave_IO_Running 和 Slave_SQL_Running 為 Yes ，則表示兩個同步執行緒正常執行中。  
#此時 master A 可以正常同步到  master B 了。

#接下來設定 master B 同步到 master A

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#master B (192.168.1.153)檢視狀態
mysql> show master status; 
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000010 |     8690 |              | mysql            |                   |
+------------------+----------+--------------+------------------+-------------------+


#master A (192.168.1.152)設定同步
mysql> STOP SLAVE;  
mysql> 
CHANGE MASTER TO     
    MASTER_HOST='192.168.1.153',
    MASTER_PORT=3306,
    MASTER_USER='replication',     
    MASTER_PASSWORD='123456',     
    MASTER_LOG_FILE='mysql-bin.000010',     
    MASTER_LOG_POS=8690; 
mysql> START SLAVE; 


#master A 檢視同步資訊
mysql> show slave status \G;  

#若看到：Slave_IO_Running 和 Slave_SQL_Running 為 Yes ，則表示兩個同步執行緒正常執行中。  

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#檢視其他資訊
mysql> show master status; 
mysql> show slave status \G; 
mysql> show slave hosts;
mysql> show processlist \G;
mysql> show full processlist \G;
mysql> show master logs;

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