主机A:192.168.1.101
从机B:192.168.1.102
1、先登录主机 A
mysql>GRANT REPLICATION SLAVE ON *.* TO slave_user@192.168.1.101 IDENTIFIED BY 'admin888';
赋予从机权限,有多台丛机,就执行多次.
2、 打开主机A的my.cnf,输入
server-id = 1 #主机标示,整数
log_bin = /var/log/mysql/mysql-bin.log #确保此文件可写
read-only =0 #主机,读写都可以
binlog-do-db =test #需要备份数据,多个写多行
binlog-ignore-db =mysql #不需要备份的数据库,多个写多行
3、打开从机B的my.cnf,输入
server-id = 2
log_bin = /var/log/mysql/mysql-bin.log
(master-host =192.168.1.101(注意:MySQL5.1以后master-*形式废弃了,采用change master to)
master-user =backup
master-pass =123456
master-port =3306)
mysql> change master to master_host='192.168.1.101',master_user='master_name',ma ster_password='admin888',master_port=3306,master_log_file='mysql-bin.000001',mas ter_log_pos=107;
(master_log_file和master_log_pos)的值你可以在服务器上运行 show master status; 来得到。
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
4、同步数据库
不用太费事,只把主从库都启动即可自动同步,如果不嫌麻烦的话可以把主库的内容导出成SQL,然后在从库中运行一遍
5、先重启主机A的mysql,再重启从机B的mysql
6、验证
在主机A中,mysql>show master statusG;
在从机B中,mysql>show slave statusG;
能看到大致这些内容
File: mysql-bin.000001
Position: 1374
Binlog_Do_DB: test
Binlog_Ignore_DB: mysql
可以在主机A中,做一些INSERT, UPDATE, DELETE 操作,看看主机B中,是否已经被修改。
mysql> show slave statusG; *************************** 1. row *************************** Slave_IO_State: Connecting to master Master_Host: 192.168.1.100 Master_User: master_name Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000001 Read_Master_Log_Pos: 107 Relay_Log_File: Y9EMERNXJ2AZ4L2-relay-bin.000001 Relay_Log_Pos: 4 Relay_Master_Log_File: mysql-bin.000001 Slave_IO_Running: Connecting Slave_SQL_Running: Yes Replicate_Do_DB: slave_user 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: 107 Relay_Log_Space: 107 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: NULL Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 1130 Last_IO_Error: error connecting to master 'master_name@192.168.1 .100:3306' - retry-time: 60 retries: 86400 Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 0 1 row in set (0.00 sec)
以上问题是:connecting... 待解决。