在我之前的文章四·安装mysql-5.7.16-linux-glibc2.5-x86_64.tar.gz(基于Centos7源码安装 和 九.mysql数据库多实例安装mysqld_multi [start,stop,report] 两篇文章写到了单太服务器多实例的安装,本篇文章是关于主从复制的配置。本次把mysql3306作为主Master,mysql3307和mysql3308作为Slave

一.启动3台mysql服务器

[mysql@iZ25ufmpy4sZ ~]$ mysqld_multi start
[mysql@iZ25ufmpy4sZ ~]$ mysqld_multi report
Reporting MySQL servers
MySQL server from group: mysqld3306 is running
MySQL server from group: mysqld3307 is running
MySQL server from group: mysqld3308 is running

二.登录Master主服务器mysql3306

[mysql@iZ25ufmpy4sZ ~]$ mysql -u root -S /tmp/mysql3306.sock -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.7.-log MySQL Community Server (GPL) Copyright (c) , , 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>

三.在Master主服务器mysql3306上建立账户并授权Slave

mysql> grant replication slave on *.* to 'mysqlsync'@'%' identified by 'mysqlsync';
Query OK, rows affected, warning (0.00 sec)

mysql> show master status;
  +----------------------+----------+--------------+------------------+-------------------+
  | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
  +----------------------+----------+--------------+------------------+-------------------+
  | mysql3306_bin.000006 | 442 | | | |
  +----------------------+----------+--------------+------------------+-------------------+
  1 row in set (0.00 sec)

四.登录Slave从服务器mysql3307或mysql3308

[mysql@iZ25ufmpy4sZ ~]$ mysql -u root -S /tmp/mysql3307.sock -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.7.-log MySQL Community Server (GPL) Copyright (c) , , 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>

五.配置Slave从服务器mysql3307或mysql3308

mysql> change master to master_host='127.0.0.1',master_user='mysqlsync',master_password='mysqlsync',master_log_file='mysql3306_bin.000006',master_log_pos=;
Query OK, rows affected, warnings (0.05 sec) mysql> start slave;
Query OK, rows affected (0.03 sec) mysql>

六.在Slave从服务器上查看slave状态

mysql> mysql> show slave status;
+----------------------------------+-------------+-------------+-------------+---------------+----------------------+---------------------+-------------------------------+---------------+-----------------------+------------------+-------------------+-----------------+---------------------+--------------------+------------------------+-------------------------+-----------------------------+------------+------------+--------------+---------------------+-----------------+-----------------+----------------+---------------+--------------------+--------------------+--------------------+-----------------+-------------------+----------------+-----------------------+-------------------------------+---------------+---------------+----------------+----------------+-----------------------------+------------------+--------------------------------------+----------------------------------------+-----------+---------------------+--------------------------------------------------------+--------------------+-------------+-------------------------+--------------------------+----------------+--------------------+--------------------+-------------------+---------------+----------------------+--------------+--------------------+
| Slave_IO_State | Master_Host | Master_User | Master_Port | Connect_Retry | Master_Log_File | Read_Master_Log_Pos | Relay_Log_File | Relay_Log_Pos | Relay_Master_Log_File | Slave_IO_Running | Slave_SQL_Running | Replicate_Do_DB | Replicate_Ignore_DB | Replicate_Do_Table | Replicate_Ignore_Table | Replicate_Wild_Do_Table | Replicate_Wild_Ignore_Table | Last_Errno | Last_Error | Skip_Counter | Exec_Master_Log_Pos | Relay_Log_Space | Until_Condition | Until_Log_File | Until_Log_Pos | Master_SSL_Allowed | Master_SSL_CA_File | Master_SSL_CA_Path | Master_SSL_Cert | Master_SSL_Cipher | Master_SSL_Key | Seconds_Behind_Master | Master_SSL_Verify_Server_Cert | Last_IO_Errno | Last_IO_Error | Last_SQL_Errno | Last_SQL_Error | Replicate_Ignore_Server_Ids | Master_Server_Id | Master_UUID | Master_Info_File | SQL_Delay | SQL_Remaining_Delay | Slave_SQL_Running_State | Master_Retry_Count | Master_Bind | Last_IO_Error_Timestamp | Last_SQL_Error_Timestamp | Master_SSL_Crl | Master_SSL_Crlpath | Retrieved_Gtid_Set | Executed_Gtid_Set | Auto_Position | Replicate_Rewrite_DB | Channel_Name | Master_TLS_Version |
+----------------------------------+-------------+-------------+-------------+---------------+----------------------+---------------------+-------------------------------+---------------+-----------------------+------------------+-------------------+-----------------+---------------------+--------------------+------------------------+-------------------------+-----------------------------+------------+------------+--------------+---------------------+-----------------+-----------------+----------------+---------------+--------------------+--------------------+--------------------+-----------------+-------------------+----------------+-----------------------+-------------------------------+---------------+---------------+----------------+----------------+-----------------------------+------------------+--------------------------------------+----------------------------------------+-----------+---------------------+--------------------------------------------------------+--------------------+-------------+-------------------------+--------------------------+----------------+--------------------+--------------------+-------------------+---------------+----------------------+--------------+--------------------+
| Waiting for master to send event | 127.0.0.1 | mysqlsync | | | mysql3306_bin. | | iZ25ufmpy4sZ-relay-bin. | | mysql3306_bin. | Yes | Yes | | | | | | | | | | | | None | | | No | | | | | | | No | | | | | | | 526196c9-dbe6-11e6-aa52-00163e0066e2 | /home/mysql/mysql3307/data/master.info | | NULL | Slave has read all relay log; waiting for more updates | | | | | | | | | | | | |
+----------------------------------+-------------+-------------+-------------+---------------+----------------------+---------------------+-------------------------------+---------------+-----------------------+------------------+-------------------+-----------------+---------------------+--------------------+------------------------+-------------------------+-----------------------------+------------+------------+--------------+---------------------+-----------------+-----------------+----------------+---------------+--------------------+--------------------+--------------------+-----------------+-------------------+----------------+-----------------------+-------------------------------+---------------+---------------+----------------+----------------+-----------------------------+------------------+--------------------------------------+----------------------------------------+-----------+---------------------+--------------------------------------------------------+--------------------+-------------+-------------------------+--------------------------+----------------+--------------------+--------------------+-------------------+---------------+----------------------+--------------+--------------------+
row in set (0.00 sec)

七.主从服务器配置测试

在Master主服务器上新建一个database,则Slave从服务器上应该也能够查询到,如下

---------------一下为主服务器

[mysql@iZ25ufmpy4sZ ~]$ mysql -u root -S /tmp/mysql3306.sock -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is
Server version: 5.7.-log MySQL Community Server (GPL) Copyright (c) , , 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> create database test;
Query OK, row affected (0.00 sec) mysql> --------------从服务器

[mysql@iZ25ufmpy4sZ ~]$ mysql -u root -S /tmp/mysql3307.sock -p
  Enter password:
  Welcome to the MySQL monitor. Commands end with ; or \g.
  Your MySQL connection id is 13
  Server version: 5.7.15-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, 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> show databases;
  +--------------------+
  | Database |
  +--------------------+
  | information_schema |
  | mysql |
  | performance_schema |
  | sys |
  | test |
  +--------------------+
  5 rows in set (0.00 sec)

mysql>

问题:1.This operation cannot be performed with a running slave io thread; run STOP SLAV

这是由于我在还没有停止slave进程的时候,又执行start slave。故要先运行stop slave,

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