比较靠谱点的mysql主从同步部署:
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 [email protected]/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。