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centos下MySQL主从同步配置 一、环境 主机: master操作系统:centos 5.3 IP:192.168.1.222 MySQL版本:5.0.77 从机: slave操作系统:centos 5.3 IP:192.168.1.220 MySQL版本:5.0.77 二、创建数据库 分别登录master机和slave机的mysql:mysql –u root –p 创建数据库:create database repl; 三、master机和slave机的相关配置 1、修改master机器中mysql配置文件my.cnf,该文件在/etc目录下 在[mysqld]配置段添加如下字段 server-id=1 log-bin=log binlog-do-db=repl //需要同步的数据库,如果没有本行,即表示同步所有的数据库 binlog-ignore-db=mysql //被忽略的数据库 在master机上为slave机添加一同步帐号 grant replication slave on *.* to 'repl'@'192.1681.220' identified by '123456'; 重启master机的mysql服务:service mysqld restart 用show master status 命令看日志情况 mysql>show master status; +-----------------+------------+-------------------+-----------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +-----------------+------------+-------------------+-----------------------+ | log.000003 | 98 | repl | mysql | +-----------------+------------+-------------------+-----------------------+ 1 row in set (0.00 sec) 2、修改slave机中mysql配置文件 同样在[mysqld]字段下添加如下内容 server-id=2 master-host=192.168.1.222 master-user=repl master-password=123456 master-port=3306 master-connect-retry=60 replicate-do-db=repl //同步的数据库,不写本行 表示 同步所有数据库 然后重启slave机的mysql 在slave机中进入mysql mysql>start slave; mysql>show slave status\G; 如果Slave_IO_Running、Slave_SQL_Running状态为Yes则表明设置成功。 四、出现的问题 当我在执行start slave这条命令时,系统提示 ERROR 1200 (HY000): The server is not configured as slave; fix in config file or with CHANGE MASTER TO, 执行show slave status;又提示Empty set (0.00 sec),想不通问题在哪里 后来发现,原来slave已经默认开启,要先关闭再开启 执行 slave stop; 再执行 change master to master_host='192.168.1.222',master_user='repl',master_password='123456', master_log_file='log.000003' ,master_log_pos=98; 然后执行 slave start; 这时 再执行show slave status\G 显示如下: *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.1.222 Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: log.000003 Read_Master_Log_Pos: 98 Relay_Log_File: mysqld-relay-bin.000002 Relay_Log_Pos: 229 Relay_Master_Log_File: log.000003 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: 98 Relay_Log_Space: 229 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 1 row in set (0.00 sec) 显示红色那两行,说明配置成功。 五、 测试主从服务器是否能同步 在主服务器上面新建一个表,必须在repl数据下 mysql> use repl Database changed mysql> create table test(id int,name char(10)); Query OK, 0 rows affected (0.00 sec) mysql> insert into test values(1,'zaq'); Query OK, 1 row affected (0.00 sec) mysql> insert into test values(1,'xsw'); Query OK, 1 row affected (0.00 sec) mysql> select * from test; +------+------+ | id | name | +-------+------+ | 1 | zaq | | 1 | xsw | +-------+------+ 2 rows in set (0.00 sec) 在从服务器查看是否同步过来 mysql> use repl; Database changed mysql> select * from test; +------+------+ | id | name | +------+------+ | 1 | zaq | | 1 | xsw | +------+------+ 2 rows in set (0.00 sec) 说明已经配置成功。 为了您的安全,请只打开来源可靠的网址 来自: 本文转自holy2009 51CTO博客,原文链接:http://blog.51cto.com/holy2010/461086 |
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