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                環境:Ubuntu 14.04.3 Server mysql5.5 一主一從 一主多從 1. 必須保證兩臺數據庫的IP能夠ping通,端口能夠打開,防火墻關閉 ## **主數據庫的配置** 1. 更改主數據庫的配置文件:sudo vi /etc/mysql/my.cnf ``` # bind-address 127.0.0.1 // 找到此選項注釋,默認訪問本機 server-id=1 // 區別服務器的標識符,只要唯一就行,默認1 log_bin=/var/log/mysql/mysql-bin.log // binlog日志 ``` 2. 重啟MySQL`/etc/init.d/mysql restart ` 如果啟動失敗,查看my.cnf中log-error錯誤日志的位置,找到該文件查看錯誤信息 3. 進入mysql數據庫,給從庫賦予權限 沒有用戶新建安一個:) ``` grant all on mdl_test.* to 'slave'@'172.16.152.157' identified by '12345'; grant replication slave on *.* to user@ip地址 identified by '123456' flush privileges; ``` 4. show master status:查看主數據庫的binlog(最后一個binlog日志)狀態信息 flush logs;多一個最新的bin-log日志 reset master;清空所有的bin-log日志,不是下面的位置那么初始化一下位置:reset master; ``` mysql> show master status; ``` +------------------+----------+--------------+---------------------------------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB(忽略同步的庫) | +------------------+----------+--------------+---------------------------------------------+ | mysql-bin.000001 | 107 | test | mysql,information_schema,performance_schema | +------------------+----------+--------------+---------------------------------------------+ ## **從數據庫的配置** 1. 修改配置文件 sudo vi /etc/mysql/my.cnf server-id=2 2. 重啟MySQL /etc/init.d/mysql restart 3. 進入mysql,開啟從服務器的同步 stop slave; // 如果以前沒有配置主從數據庫,此選項可以省略 4. 設置從主數據庫賦值binlog日志的配置 change master to master_host='172.16.52.169', master_user='slave', master_password='123456', master_log_file='mysql-bin.000001', master_log_pos=107;(此處的file和pos需要查看主數據庫的show master status狀態) 5. 開啟slave `start slave; ` 6. 查看slave信息,確認開啟成功 `show slave status\G; ` Slave_IO_Running:YES Slave_SQL_Running:YES 上述的值都變味yes則成功 如果失敗,查看log-error日志,確認問題,修正問題(下面有一行last_IO_Error也有提示)
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