docker搭建主从复制mysql

步骤：

---启动两个master和slave容器

---修改配置master和slave的my.cnf

---master添加从服务器要要复制的用户并授权

---slave添加主服务器相关信息，并开启slave

 

1.启动两个容器

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docker run -d --name mysql_master -p 3306:3306 -e MYSQL_ROOT_PASSWORD=root mysql   docker run -d --name mysql_slave -p 3307:3306 -e MYSQL_ROOT_PASSWORD=root mysql

 2.修改两个配置文件

master

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# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; version 2 of the License. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA   # # The MySQL  Server configuration file. # # For explanations see # http://dev.mysql.com/doc/mysql/en/server-system-variables.html   [mysqld] pid-file        = /var/run/mysqld/mysqld.pid socket          = /var/run/mysqld/mysqld.sock datadir         = /var/lib/mysql secure-file-priv= NULL log-bin=mysql-bin server_id=1 # Custom config should go here !includedir /etc/mysql/conf.d/

 slave

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# Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; version 2 of the License. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA   # # The MySQL  Server configuration file. # # For explanations see # http://dev.mysql.com/doc/mysql/en/server-system-variables.html   [mysqld] pid-file        = /var/run/mysqld/mysqld.pid socket          = /var/run/mysqld/mysqld.sock datadir         = /var/lib/mysql secure-file-priv= NULL server_id=233 relay_log=mysql-relay-bin # Custom config should go here !includedir /etc/mysql/conf.d/

 3.添加授权用户，记录master状态

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create user slave'@'%' identified by '123456';   grant replication slave on *.* to 'slave'@'%';   mysql> show master status; +---------------+----------+--------------+------------------+-------------------+ | File          | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +---------------+----------+--------------+------------------+-------------------+ | binlog.000002 |     1249 |              |                  |                   | +---------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)

 

4.添加主服务器信息，开启slave模式

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change master to master_host='172.17.0.2', master_user='slave', master_password='123456', master_port=3306, master_log_file='binlog.000002', master_log_pos=1249, master_connect_retry=30;    start slave;

 

主服务器创建数据库验证

 

报错

1.可能会有下面的报错，解决方法：https://blog.csdn.net/sunbocong/article/details/81634296

The slave I/O thread stops because master and slave have equal MySQL server UUIDs

2.以前有过slave复制会开启失败，解决方法如下：

 

stop slave;

 

reset slave;

 

然后再重复上面的操作就可以了

 

参考文章：

https://juejin.im/post/5b0f91ab518825153749b1db

https://www.jianshu.com/p/ab20e835a73f