Mysql-主从精简配置

主从配置
一、
A主机IP：192.168.1.100B主机IP：192.168.1.101 1、数据库分配权限给从服 mysql>GRANT REPLICATION SLAVE ON *.* TO ‘backup’@’192.168.1.85‘ IDENTIFIED BY ‘123456’;

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 此步骤可以不用
read-only =0 #主机，读写都可以 此步骤可以不用
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 此步骤可以不用 ------------------------------------------------------------------或 [mysqld]port = 3306socket = /tmp/mysql.sock basedir = /data/apps/mysqldatadir = /data/mysql/datapid-file = /data/mysql/data/mysql.piduser = mysqlbind-address = 0.0.0.0server-id = 1log-bin =/data/mysql/data/mysql-bin.logbinlog-do-db =testbinlog-do-db =ping1binlog-do-db =ping2log_bin_trust_function_creators=1 数据库备份过从库mysql> flush tables with read lock;Query OK, 0 rows affected (0.19 sec)之后是mysqldumpmysqldump -h127.0.0.1 -p3306 -uroot -p test > /home/chenyz/test.sql最好在主数据库备份完毕，恢复写操作mysql> unlock tables;

3、打开从机B的my.cnf，输入

server-id = 2

进入mysqlStop Slave; Change master to
master_host =’192.168.110.100’,
master_user =’backup’,
master_password =’123456’,
master_port =3306, Master_log_file =’fileid’,Master_log_pos=pos;binlog-do-db =testbinlog-ignore-db =test 忽略某个库的操作写进二进制日志中。---------------------------------------------------------------------或 change master to master_host ='192.168.1.100';change master to master_user ='backup';change master to master_password='123456';change master to master_port =3306;change master to master_log_file='mysql-bin.000006';change master to master_log_pos=214; Start Slave; 从服my.conf配置文件：
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
---------------------------------------------------------------------或[mysqld]port = 3306socket = /tmp/mysql.sock basedir = /data/apps/mysql #数据库安装目录datadir = /data/mysql/data #数据库data目录pid-file = /data/mysql/data/mysql.piduser = mysqlbind-address = 0.0.0.0server-id = 2log-bin =/data/mysql/data/mysql-bin.logreplicate-do-db =testreplicate-do-db =ping1replicate-do-db =ping2log_bin_trust_function_creators=1
4、同步数据库

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 status\G;
File: mysql-bin.000007 Position: 130702 Binlog_Do_DB: test,ping1,ping2 Binlog_Ignore_DB:Executed_Gtid_Set:
在从机B中，mysql>show slave status\G; Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.100 Master_User: backup Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000007 Read_Master_Log_Pos: 130702 Relay_Log_File: mysql-relay-bin.000005 Relay_Log_Pos: 130865 Relay_Master_Log_File: mysql-bin.000007 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: test,ping1,ping2

在打印出来的状态下，查看以下两个参数的值： Slave_IO_Running: Yes Slave_SQL_Running: Yes

到此你已经可以使用了！