一、安裝環境

操作系統：CentOS-7-x86_64-DVD-1611.iso

數據庫版本：mysql-5.6.39-linux-glibc2.12-x86_64.tar.gz

數據庫地址：

192.168.2.1(主)

192.168.2.2(從)

MySQL在5.6之前和之后的安裝方式是不一樣的。

首先保證3306端口的可用，或者關閉防火墻，兩臺機子可以互相ping

二、Master的配置

1.修改MySQL配置文件

[[email?protected] ~]# vim /etc/my.cnf

文件內容

[mysqld]

#開啟二進制日志

log-bin=mysql-bin

#標識唯一id(必須)，一般使用ip最后位

server-id=2

#不同步的數據庫，可設置多個

binlog-ignore-db=information_schema

binlog-ignore-db=cluster

binlog-ignore-db=mysql

#指定需要同步的數據庫(和slave是相互匹配的)，可以設置多個

binlog-do-db=test

2.重啟MySQL

service mysqld restart

3.進去mysql設置允許從庫獲得主庫日志　　注：這里使用root用戶配置，不建議使用

[[email?protected] ~]# mysql -u root -p

#給從庫放權限

mysql>GRANT FILE ON *.* TO [email?protected] IDENTIFIED BY ‘root password‘;

mysql>GRANT REPLICATION SLAVE ON *.* TO [email?protected] IDENTIFIED BY ‘root password‘;

mysql>FLUSH PRIVILEGES;

4.重啟MySQL，登錄MySQL，查看主庫信息

mysql> show master status;

顯示內容

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

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000006 | 120 | ufind_db | information_schema,cluster,mysql | |

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

1 row in set (0.00 sec)

mysql>

注：如果執行這個步驟始終為Empty set(0.00 sec)，那說明前面的my.cnf沒配置對

三、Slave的配置

1.從庫配置

#開啟二進制日志(可以不配置)

log-bin=mysql-bin

server-id=3

binlog-ignore-db=information_schema

binlog-ignore-db=cluster

binlog-ignore-db=mysql

#與主庫配置一直

replicate-do-db=test

replicate-ignore-db=mysql

log-slave-updates

slave-skip-errors=all

slave-net-timeout=60

4.重啟MySQL，登錄MySQL

#關閉Slave

mysql> stop slave;

#設置連接主庫信息

mysql> change master to master_host=‘192.168.2.1‘,master_user=‘root‘,master_password=‘root password‘,master_log_file=‘mysql-bin.000006‘, master_log_pos=120;

#開啟Slave

mysql> start slave;

注：上面的master_log_file是在配置Master的時候的File字段， master_log_pos是在配置Master的Position 字段。一定要一一對應

5.查看信息

mysql> show slave status \G;

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

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.2.1

Master_User: root

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000006

Read_Master_Log_Pos: 120

Relay_Log_File: localhost-relay-bin.000006

Relay_Log_Pos: 520

Relay_Master_Log_File: mysql-bin.000006

Slave_IO_Running: Yes　　//顯示yes為成功

Slave_SQL_Running: Yes　　//顯示yes為成功，如果為no，一般為沒有啟動master

Replicate_Do_DB: test

Replicate_Ignore_DB: mysql

//上面的都是配置文件中的信息

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: 357

Relay_Log_Space: 697

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

Master_SSL_Verify_Server_Cert: No

Last_IO_Errno: 0

Last_IO_Error:　　//如果為no，此處會顯示錯誤信息

Last_SQL_Errno: 0

Last_SQL_Error:

Replicate_Ignore_Server_Ids:

Master_Server_Id: 2

Master_UUID: be0a41c0-2b40-11e8-b791-000c29267b6a

Master_Info_File: /usr/local/mysql/data/master.info

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it

Master_Retry_Count: 86400

Master_Bind:

Last_IO_Error_Timestamp:

Last_SQL_Error_Timestamp:

Master_SSL_Crl:

Master_SSL_Crlpath:

Retrieved_Gtid_Set:

Executed_Gtid_Set:

Auto_Position: 0

1 row in set (0.00 sec)

ERROR:

No query specified

注：如果Slave_IO_Running: No　　出現下面的錯誤

Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.

說明主服務器的UUID和從服務器的UUID重復，更改方式

[[email?protected] ~]# vim /usr/local/mysql/data/auto.cnf　　#這是我的安裝路徑修改auto.cnf的server-uuid

以上主從MySQL已經可以使用了，歡迎各位多提bug

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