master:192.168.2.67

slave:192.168.2.211

同步系统非默认库,master中其它库已经运行一段时间。

master端：

vim /etc/my.cnf

server-id       = 1    master端ID号

log-bin=/data/logbin/mysql-bin    日志路径及文件名

#binlog-do-db = cacti            同步cacti，此处关闭的话，就是除不允许的，其它的库均同步。

binlog-ignore-db = mysql        不同步mysql库，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;

此处主要记录下file和position的值，slave端要使用到。如下

File             | Position  |

+------------------+----------

| mysql-bin.000047 | 391592414

另外一个窗口运行下面的：

tar -czf /data/mysql/cacti.tgz /data/mysql/cacti

scp /data/mysql/cacti.tgz root@192.168.2.211/data/mysql/cacti.tgz

完成后返回前一个窗口解锁数据库只读。

mysql>unlock tables;

slave端：

vim /etc/my.cnf

server-id = 2      slave的ID号，此处一定要大于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端创建的用于主从同步的账户和密码

     >master_password='123456',

     >master_port='3306',                             master端设置的client端使用的端口号。

     >master_log_file='mysql-bin.000047',             master端记录的file值

     >master_log_pos=391592414;                       master端记录的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个都为yes则证明主从同步正常，如果有任一个显示NO,则证明同步有问题。可以查看数据库日志文件，里面基本上会显示出错误之处，根据错误一步一步排查，基本上都可以解决的。