MySQL 5.7.16多源复制

演示一下在MySQL下搭建多主一从的过程。

实验环境:

192.168.24.129:3306

192.168.24.129:3307

192.168.24.129:3308

主库操作

导出数据

分别在3306和3307上导出需要的数据库。

3306:

登录数据库:

[root@localhost 3306]# mysql -uroot -poldboy123 -S /tmp/mysql3306.sock

锁表:

mysql> flush tables with read lock;

状态点:

mysql> show master status;

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

| File| Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000006 |      154 |              |                  |                  |

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

1 row in set (0.00 sec)

另开窗口开始导数据:

[root@localhost tmp]# mysqldump -uroot -poldboy123 -S /tmp/mysql3306.sock -F -R -x --master-data=2 -A --events|gzip >/tmp/dockerwy.sql.gz

在此查看状态点两个要保持一致,否则表没有锁住

mysql> show master status;

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

| File| Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000007 |      154 |              |                  |                  |

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

1 row in set (0.00 sec)

解锁表:

mysql> unlock tables;

3307:

登录3307数据库: 

[root@localhost 3307]# mysql -uroot -poldboy123 -S /tmp/mysql3307.sock

锁表:

mysql>flush tables with read lock;

查看状态点:

mysql> show master status;

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

| File| Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000007 |      154 |              |                |                  |

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

1 row in set (0.00 sec)

另开窗口导数据:

[root@localhost 3307]# mysqldump -uroot -poldboy123 -S /tmp/mysql3307.sock -F -R -x --master-data=2 -A --events|gzip >/tmp/dockerwy_2.sql.gz

从新查看状态点:

mysql> show master status;

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

| File| Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| mysql-bin.000008 |      154 |              |                  |                  |

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

1 row in set (0.00 sec)

解锁表:

mysql> unlock tables;

Query OK, 0 rows affected (0.00 sec)

建立授权账号

分别在3306和3307上面建立授权账号

3306:

mysql> grant replication slave on *.* to 'backup'@'192.168.24.129' identified by 'backup';

3307:

mysql> grant replication slave on *.* to 'backup'@'192.168.24.129' identified by 'backup';

从库操作

修改从库存储方式

修改3308的master-info和relay-info方式,从文件存储改为表存储。

编辑配置文件

[root@localhost 3308]# vim my.cnf

在[mysqld]模块下添加如下两行

master_info_repository=TABLE

relay_log_info_repository=TABLE

重启3308数据库:

[root@localhost 3308]# /data/3308/mysqld restart

重启之后我们可以登录数据库查看;

[root@localhost 3308]# mysql -uroot -poldboy123 -S /tmp/mysql3308.sock

mysql: [Warning] Using a password on the command line interface can be insecure.

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

Your MySQL connection id is 3

Server version: 5.7.16 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 variables like 'relay_log_info_repository';

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

| Variable_name            | Value |

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

| relay_log_info_repository | TABLE |

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

1 row in set (0.01 sec)

mysql> show variables like 'master_info_repository';

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

| Variable_name          | Value |

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

| master_info_repository | TABLE |

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

1 row in set (0.01 sec)

导入数据

导入3306的数据:

[root@localhost 3308]# gzip -d /tmp/dockerwy.sql.gz

[root@localhost 3308]# mysql -uroot -poldboy123 -S /tmp/mysql3308.sock < /tmp/dockerwy.sql.

导入3307的数据:

[root@localhost 3308]# gzip -d /tmp/dockerwy_2.sql.gz

[root@localhost 3308]# mysql -uroot -poldboy123 -S /tmp/mysql3308.sock < /tmp/dockerwy_2.sql

执行change master to

登录slave进行同步操作,分别change master两台服务器,后面以for channel ‘channel_name’区分

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