CentOs7中mysql5.7如何实现主从复制配置

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这篇文章主要介绍 CentOs7 中 mysql5.7 如何实现主从复制配置,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!

MySQL5.7 主、从配置具体步骤:

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1. 两台 MySQL 服务器

主:192.168.253.138   端口:1221

从:192.168.253.139   端口:1221

2. 修改主从配置参数

2.1 主服务器

## 添加入下内容

vi /etc/my.cnf

[mysqld]

log-bin = mysql-bin ## 必须启用二进制格式日志

server-id=138  ##server-id 必须唯一,一般为 IP 的尾数

2.2 从服务器

## 添加入下内容

vi /etc/my.cnf

[mysqld]

log-bin = mysql-bin ## 启用二进制格式日志,可选配置

server-id=139  ##server-id 必须唯一,一般为 IP 的尾数

3. 重启主、从服务器使修改生效

主服务器(138)

[root@my01 ~]# service mysql restart

Shutting down MySQL.. SUCCESS!

Starting MySQL. SUCCESS!

从服务器(139)

[root@my02 ~]# service mysql restart

Shutting down MySQL.. SUCCESS!

Starting MySQL. SUCCESS!

4. 在主服务器上创建复制账号并授权 slave

[root@my01 ~]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 5

Server version: 5.7.19-log MySQL Community Server (GPL)

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type help; or \h for help. Type \c to clear the current input statement.

mysql grant replication slave on *.* to mysync @ % identified by mysql123

Query OK, 0 rows affected, 1 warning (0.02 sec)

mysql

5. 查看主服务器状态

## 记录 File 与 Position 的值,配置从服务器时使用,之后主服务器就不要做任何操作了,避免值的改变使得从服务器配置失败

mysql show master status;

+——————+———-+————–+——————+——————-+

| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+——————+———-+————–+——————+——————-+

| mysql-bin.000001 | 1306 | | | |

+——————+———-+————–+——————+——————-+

1 row in set (0.00 sec)

6. 配置、启动从服务器

[root@my02 ~]# mysql -u root -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 7

Server version: 5.7.19-log MySQL Community Server (GPL)

Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type help; or \h for help. Type \c to clear the current input statement.

mysql

mysql CHANGE MASTER TO MASTER_HOST= 192.168.253.138 , MASTER_PORT=1221, MASTER_USER= mysync , MASTER_PASSWORD= mysql123 , MASTER_LOG_FILE= mysql-bin.000001 , MASTER_LOG_POS=1306;

Query OK, 0 rows affected, 2 warnings (0.01 sec)

mysql start slave;

Query OK, 0 rows affected (0.01 sec)

7. 查看从服务器复制状态

## 最主要的是查看 Slave_IO_Running: Yes,Slave_SQL_Running: Yes 这两项是不是 YES,是则代表主从配置成功,否则失败

mysql show slave status\G

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

 Slave_IO_State: Waiting for master to send event

 Master_Host: 192.168.253.138

 Master_User: mysync

 Master_Port: 1221

 Connect_Retry: 60

 Master_Log_File: mysql-bin.000001

 Read_Master_Log_Pos: 1306

 Relay_Log_File: my02-relay-bin.000003

 Relay_Log_Pos: 320

 Relay_Master_Log_File: mysql-bin.000001

 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: 1306

 Relay_Log_Space: 526

 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:

 Last_SQL_Errno: 0

 Last_SQL_Error:

 Replicate_Ignore_Server_Ids:

 Master_Server_Id: 138

 Master_UUID: dfb01359-857f-11e7-8ed4-000c2997411c

 Master_Info_File: /data/db/mysql/1221/master.info

 SQL_Delay: 0

 SQL_Remaining_Delay: NULL

 Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates

 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

 Replicate_Rewrite_DB:

 Channel_Name:

 Master_TLS_Version:

1 row in set (0.00 sec)

mysql

8. 测试主、从情况

## 主服务器

mysql show databases;

+——————–+

| Database |

+——————–+

| information_schema |

| mysql |

| performance_schema |

| sys |

+——————–+

4 rows in set (0.01 sec)

mysql create database test;

Query OK, 1 row affected (0.02 sec)

mysql show databases;

+——————–+

| Database |

+——————–+

| information_schema |

| mysql |

| performance_schema |

| sys |

| test |

+——————–+

5 rows in set (0.00 sec)

mysql use test;

Database changed

mysql show tables;

Empty set (0.00 sec)

mysql create table t(id int,name varchar(10));

Query OK, 0 rows affected (0.04 sec)

mysql insert into t values (1, zhang san

Query OK, 1 row affected (0.07 sec)

mysql show tables;

+—————-+

| Tables_in_test |

+—————-+

| t |

+—————-+

1 row in set (0.00 sec)

mysql select * from

 –

+——+———–+

| id | name |

+——+———–+

| 1 | zhang san |

+——+———–+

1 row in set (0.00 sec)

mysql insert into t values (2, li si

Query OK, 1 row affected (0.01 sec)

mysql

### 从服务器

mysql show databases;

+——————–+

| Database |

+——————–+

| information_schema |

| mysql |

| performance_schema |

| sys |

| test |

+——————–+

5 rows in set (0.00 sec)

mysql use test;

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql show tables;

+—————-+

| Tables_in_test |

+—————-+

| t |

+—————-+

1 row in set (0.00 sec)

mysql select * from t;

+——+———–+

| id | name |

+——+———–+

| 1 | zhang san |

| 2 | li si |

+——+———–+

2 rows in set (0.00 sec)

mysql

#### 恭喜成功了!!!

## 注意:主服务器权限配置,如下:

mysql update user set user.Host= % where user.User= root

Query OK, 1 row affected (0.00 sec)

Rows matched: 1  Changed: 1  Warnings: 0

mysql flush privileges;

Query OK, 0 rows affected (0.01 sec)

### 此配置保证其它服务器能够连接到主服务器,否则后面的从服务器配置复制时会失败!!!

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