主服务器192.168.0.171
从服务器192.168.0.172
服务器环境 Centos6.0
mysql版本5.1.66
1.主MySql配置
登录到主服务器192.168.0.171的mysql,添加具有复制权限(REPLICATION)用户
mysql>GRANT REPLICATION SLAVE ON *.* TO 'backup'@'192.168.1.172' IDENTIFIED BY '1234';
赋予从机权限,有多台丛机,就执行多次
/etc/my.cnf
在[mysqld]段中添加
log-bin=mysql-bin
server-id=1 #主机标示,整数
read-only=0 #主机,读写都可以
binlog-do-db=test #需要备份数据,多个写多
binlog-ignore-db=mysql #不需要备份的数据库,多个写多行
2.从MySql配置
/etc/my.cnf
在[mysqld]段中添加
log-bin=mysql-bin
server-id=2
master-host=192.168.0.171
master-user=backup
master-pass=1234
master-port=3306
master-connect-retry=60 #如果从服务器发现主服务器断掉,重新连接的时间差(秒)
replicate-do-db =test #只复制某个库
replicate-ignore-db=mysql #不复制某个库
3.重启mysql
检查下能否用backup账户从192.168.0.172登录到192.168.0.171
如果登录不了,可能的原因是iptables防火墙造成
查询主数据库状态
从服务器
检查主从同步
如果您看到Slave_IO_Running和Slave_SQL_Running均为Yes,则主从复制连接正常。
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.171
Master_User: backup
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000001
Read_Master_Log_Pos: 106
Relay_Log_File: mysqld-relay-bin.000002
Relay_Log_Pos: 251
Relay_Master_Log_File: mysql-bin.000001
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: test
Replicate_Ignore_DB: mysql
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: 106
Relay_Log_Space: 407
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: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
1 row in set (0.00 sec)
ERROR:
No query specified