上次配置mysql的主從復制還是年初的時候,沒想到現在又開始使用mysql了。話不多說,進入正題
Master-Slave 搭建環境: Master: Os: rhel-server-6.3-x86_64 Mysql: MySQL -5.5.35-1 虛擬機:Virtual BOX Ip:192.168.56.12 Slave: Os: rhel-server-6.3-x86_64 Mysql: MySQL -5.5.35-1 虛擬機:Virtual BOX Ip:192.168.56.13
總體步驟:
1、 修改Master配置文件(my.cnf)
2、 在Master上創建一個有復制權限的用戶
3、 復制Master上的數據庫到Slave
4、 修改Slave配置文件(my.cnf)
5、 Slave初始化復制
6、 測試
7、 常見問題
[mysqld] server-id=1 //必須是服務器唯一id,默認是0, log-bin=mysql-bin //必須啟用二進制日志 replicate-do-db=zbdba
2、 在Master上創建一個有復制權限的用戶
mysql>create user zbdba; mysql>grant replication slave on *.* to zbdba identified by '123456';
3、 復制Master上的數據庫到Slave
mysql>flush tables with read lock; mysql> show master status -> ; +-----------------+----------+--------------+------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | +-----------------+----------+--------------+------------------+ | ogg1-bin.000003 | 107 | | | +-----------------+----------+--------------+------------------+1 row in set (0.00 sec) mysql>quit [root@ogg /]# /usr/bin/mysqldump zbdba -uroot -pmysql --opt | mysql zbdba -uroot -pmysql -h 192.168.56.13 需要在slave中授權: GRANT ALL PRIVILEGES ON *.* TO 'root'@'192.168.56.13' IDENTIFIED BY 'mysql' WITH GRANT OPTION; mysql>unlock tables;4、 修改Slave配置文件(my.cnf)
[mysqld] server-id=2 //必須是服務器唯一id,默認是0, log-bin=mysql-bin //必須啟用二進制日志 replicate-do-db=zbdba
mysql>slave stop; mysql>CHANGE MASTER TO MASTER_HOST='192.168.56.12', MASTER_USER='zbdba',MASTER_PASSWORD='123456',MASTER_LOG_FILE='ogg1-bin.000003',MASTER_LOG_POS=107; mysql> show slave status\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.56.12 Master_User: zbdba Master_Port: 3306 Connect_Retry: 60 Master_Log_File: ogg1-bin.000003 Read_Master_Log_Pos: 107 Relay_Log_File: ogg2-relay-bin.000002 Relay_Log_Pos: 252 Relay_Master_Log_File: ogg1-bin.000003 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: zbdba
master:
mysql> show tables; +-----------------+ | Tables_in_zbdba | +-----------------+ | guestbook | | test | | test1 | +-----------------+
create table test2 select * from test1;
mysql> show tables; +-----------------+ | Tables_in_zbdba | +-----------------+ | guestbook | | test | | test1 | | test2 | +-----------------+salve:
mysql> show tables; +-----------------+ | Tables_in_zbdba | +-----------------+ | guestbook | | test | | test1 | | test2 | +-----------------+ 4 rows in set (0.00 sec)
7、 常見問題
/etc下面沒有對應的my.cnf文件
解決方法:
如果mysql使用rpm包安裝的,/etc下沒有對應的my.cnf文件,這時候只需要復制一個/usr/share/mysql目錄下的.cnf文件到/etc目錄,並改名為my.cnf即可。
Server-id參數無法修改
解決方法:
看my.cnf中是否存在相同的server-id=1
MYSQL主備出現這個錯誤: ERROR 1201 (HY000):
解決方法:
mysql> slave stop;
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> reset slave;
Query OK, 0 rows affected,(0.00 sec)
ERROR 1130 (HY000): Host '*.*.*.*' is not allowed to connect to this MySQL server
解決方法:
如果你想允許用戶myuser從ip為192.168.1.3的主機連接到mysql服務器,並使用mypassword作為密碼
GRANT ALL PRIVILEGES ON *.* TO 'myuser'@'192.168.1.3' IDENTIFIED BY 'mypassword' WITH GRANT OPTION;