如何在 CentOS 7 中设置 mysql 5.7 主从复制模式
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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： 点击(此处)折叠或打开 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 -> t; +------+-----------+ | 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！ （编辑：银川站长网） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |
