Mysql5.7 主从复制配置

Posted 2020-09-26 hobinly

1、环境

     Centos 7

     mysql 5.7

     Master  192.168.1.71

     Slave01 192.168.1.72

 

 

2、分别配置master，slave01

 # vi /etc/my.cnf

       [mysqld]
       log-bin=mysql-bin   //[必须]启用二进制日志                                        ------新增
       server-id=71      //[必须]服务器唯一ID，slave01此处为72                  ------新增

 

3、重启master，slave01的mysql服务

#systemctl restart mysqld.service

注意该命令为red hat/centos系统重启服务命令

 

4、在master服务器上，登陆mysql,并创建复制使用账户，并分配权限给该账户

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

Enter password:

 ...

mysql> GRANT REPLICATION SLAVE ON *.* to ‘copier‘@‘%‘ identified by ‘copy123‘;

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql>

 5、查看master数据库的bin日志文件信息

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      439 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

 

6、在slave01服务器上，登陆mysql,连接master，启动复制

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

Enter password:

 ...

 mysql> change master to master_host=‘192.168.1.71‘,master_user=‘copier‘,master_password=‘copy123‘,master_log_file=‘mysql-bin.000001‘,master_log_pos=439; Query OK, 0 rows affected, 2 warnings (0.02 sec)

mysql> start slave; Query OK, 0 rows affected (0.00 sec)

mysql>

 

7、在slave01查看复制状态

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Connecting to master
                  Master_Host: 192.168.1.71
                  Master_User: copier
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 439
               Relay_Log_File: slave01-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Connecting
            Slave_SQL_Running: Yes
       ...
1 row in set (0.00 sec)

发现 Slave_IO_State为 Connecting to master，一直在连接Master，检查网络

[[email protected] ~]# telnet 192.168.1.71 3306
Trying 192.168.1.71...
telnet: connect to address 192.168.1.71: No route to host

说明master禁止对端口3306访问，需要对端口3306开发，开放后

如在master上执行

[[email protected] ~]#  firewall-cmd --add-port=3306/tcp --permanent

[[email protected] ~]# firewall-cmd --reload

再在slave01上查看状态
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event

...

8、测试

在master服务上，登陆mysql ,测试以下数据

mysql> create database helloDb;

Query OK, 1 row affected (0.01 sec)

mysql> use helloDb;

Database changed

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

Query OK, 0 rows affected (0.01 sec)

mysql> insert into helloword values(1,‘test‘);

Query OK, 1 row affected (0.01 sec)

mysql> insert into helloword values(2,‘hi‘);

Query OK, 1 row affected (0.01 sec)

mysql> select * from helloword;

+------+------+
| id   | name |
+------+------+
|    1 | test |
|    2 | hi   |
+------+------+

2 rows in set (0.00 sec)

 

在slave01上，登陆mysql ,测试以下数据

mysql> show databases;

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

| Database           |

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

| information_schema |

| helloDb            |

| mysql              |

| performance_schema |

| sys                |

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

5 rows in set (0.03 sec)

mysql> use helloDb;

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> select * from helloword;

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

| id   | name |

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

|    1 | test |

|    2 | hi   |

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

2 rows in set (0.00 sec)

 

至此主从复制配置成功。