mysql主從複製（1個master 1個slave)

####mysql複製

1.搭建一個master對應1個slave(只複製某個數據庫)

(1)規劃網絡和主從服務器

master:10.10.54.86

slave:10.10.54.85

(2)主機設置

log-bin=master-bin

binlog_format=mixed

server-id=1

[root@nan86 tmp]# /etc/init.d/mysqld restart

 ERROR! MySQL server PID file could not be found!

Starting MySQL.. SUCCESS! 

(3)從機設置

log-bin=slave-bin

binlog_format=mixed

server-id=10

[root@nan85 ~]# /etc/init.d/mysqld restart

 ERROR! MySQL server PID file could not be found!

Starting MySQL.. SUCCESS! 

(4)在master上面建立一個複製用戶並授予權限

mysql> grant replication slave on *.* to 'emp'@'10.10.54.85' identified by '123';

Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;

Query OK, 0 rows affected (0.00 sec)

(5)查看master上的二進制日誌和position位置

mysql> show master status;

+-------------------+----------+--------------+------------------+

| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |

+-------------------+----------+--------------+------------------+

| master-bin.000006 |      330 |              |                  |

+-------------------+----------+--------------+------------------+

1 row in set (0.00 sec)

(6)備份master上的數據，把備份master數據庫還原到從庫上

[root@nan86 tmp]# mysqldump -uroot -p123456 --master-data=2 --single-transaction --flush-logs --database employees>employees.sql

[root@nan86 tmp]# mysql -uroot -p123456 -h10.10.54.85<employees.sql

備註：-p 後接的密碼爲從機受權的密碼

(7)在slave上面change master操做

mysql> change master to master_host='10.10.54.86',master_user='emp', master_password='123', master_log_file='master-bin.000006',master_log_pos=330;

Query OK, 0 rows affected (0.01 sec)

------

問題備註：
CHANGE MASTER TO MASTER_HOST='10.10.54.85',MASTER_PORT=3306,MASTER_USER='slave2',MASTER_PASSWORD='slave2',MASTER_LOG_FILE='master-bin.000009',MASTER_LOG_POS=120;

----

(8)在slave上啓動slave

mysql> start slave;

Query OK, 0 rows affected (0.00 sec)

(9)查看slave的狀態

mysql> show slave status\G;

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 10.10.54.86

                  Master_User: emp

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: master-bin.000007

          Read_Master_Log_Pos: 107

               Relay_Log_File: nan85-relay-bin.000004

                Relay_Log_Pos: 254

        Relay_Master_Log_File: master-bin.000007

             Slave_IO_Running: Yes

            Slave_SQL_Running: Yes

(10)測試

主上：

mysql> create database b;

Query OK, 1 row affected (0.02 sec)

從上：顯示有數據庫b

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| a                  |

| b                  |

| employees          |

| mysql              |

| performance_schema |

| test               |

+--------------------+

測試在master上建立刪除添加數據，在slave上都能同步。