mysql主從同步部署：
master:192.168.2.67
slave:192.168.2.211
同步系統非默認庫,master中其它庫已經運行一段時間。
master端：
vim /etc/my.cnf
server-id = 1 master端ID號
log-bin=/data/logbin/mysql-bin 日誌路徑及文件名
#binlog-do-db = cacti 同步cacti，此處關閉的話，就是除不允許的，其它的庫均同步。
binlog-ignore-db = mysql 不同步mysql庫，以下同上
binlog-ignore-db = test
binlog-ignore-db = information_schema
/usr/local/mysql/bin/mysql -uroot -p
mysql>grant replication slave on *.* to rsync@'192.168.2.211' identified by '123456';
mysql>flush privileges;
mysql>flush tables with read lock;
mysql>show master status;
此處主要記錄下file和position的值，slave端要使用到。如下
File | Position |
+------------------+----------
| mysql-bin.000047 | 391592414
另外一個窗口運行下面的：
tar -czf /data/mysql/cacti.tgz /data/mysql/cacti
scp /data/mysql/cacti.tgz [email protected]/data/mysql/cacti.tgz
完成後返回前一個窗口解鎖數據庫只讀。
mysql>unlock tables;
slave端：
vim /etc/my.cnf
server-id = 2 slave的ID號，此處一定要大於master端。
保存退出。
/usr/local/mysql/bin/mysqladmin -uroot -p shutdown
tar xvzf /data/mysql/cacti.tgz /data/mysql/cacti
chown -R mysql.mysql /data/mysql/cacti
/usr/local/mysql/bin/mysql -uroot -p
mysql>stop slave;
mysql>change master to
>master_host='192.168.2.67',
>master_user='rsync', master端創建的用於主從同步的賬戶和密碼
>master_password='123456',
>master_port='3306', master端設置的client端使用的端口號。
>master_log_file='mysql-bin.000047', master端記錄的file值
>master_log_pos=391592414; master端記錄的position值
mysql>start slave;
mysql>show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.2.67
Master_User: rsync
Master_Port: 3306
Connect_Retry: 30
Master_Log_File: mysql-bin.000047
Read_Master_Log_Pos: 413641446
Relay_Log_File: backter-relay-bin.000002
Relay_Log_Pos: 13433937
Relay_Master_Log_File: mysql-bin.000047
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 405026116
Relay_Log_Space: 22049267
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 148
1 row in set (0.00 sec)
查看上面的Slave_IO_Running: Yes 和Slave_SQL_Running: Yes 2個都爲yes則證明主從同步正常，如果有任一個顯示NO,則證明同步有問題。可以查看數據庫日誌文件，裏面基本上會顯示出錯誤之處，根據錯誤一步一步排查，基本上都可以解決的。