docker搭建mysql 主从复制环境步骤教程

1、安裝mysql

docker pull index.tenxcloud.com/tenxcloud/mysql

2、首先创建两个文件

my-master.cnf（主库配置） 

# Copyright (c) 2014, 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 Community Server configuration file.

#

# For explanations see

# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

[client]

port        = 3306

socket      = /var/run/mysqld/mysqld.sock

[mysqld_safe]

pid-file    = /var/run/mysqld/mysqld.pid

socket      = /var/run/mysqld/mysqld.sock

nice        = 0

[mysqld]

user        = mysql

pid-file    = /var/run/mysqld/mysqld.pid

socket      = /var/run/mysqld/mysqld.sock

port        = 3306

basedir     = /usr

datadir     = /var/lib/mysql

tmpdir      = /tmp

lc-messages-dir = /usr/share/mysql

explicit_defaults_for_timestamp

log-bin = mysql-bin 

server-id = 1 

# Instead of skip-networking the default is now to listen only on

# localhost which is more compatible and is not less secure.

#bind-address   = 127.0.0.1

#log-error  = /var/log/mysql/error.log

# Recommended in standard MySQL setup

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

# * IMPORTANT: Additional settings that can override those from this file!

#   The files must end with '.cnf', otherwise they'll be ignored.

#

!includedir /etc/mysql/conf.d/

my-slave.cnf（从库配置） 

# Copyright (c) 2014, 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 Community Server configuration file.

#

# For explanations see

# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

[client]

port        = 3306

socket      = /var/run/mysqld/mysqld.sock

[mysqld_safe]

pid-file    = /var/run/mysqld/mysqld.pid

socket      = /var/run/mysqld/mysqld.sock

nice        = 0

[mysqld]

user        = mysql

pid-file    = /var/run/mysqld/mysqld.pid

socket      = /var/run/mysqld/mysqld.sock

port        = 3306

basedir     = /usr

datadir     = /var/lib/mysql

tmpdir      = /tmp

lc-messages-dir = /usr/share/mysql

explicit_defaults_for_timestamp

log-bin = mysql-bin 

server-id = 2

# Instead of skip-networking the default is now to listen only on

# localhost which is more compatible and is not less secure.

#bind-address   = 127.0.0.1

#log-error  = /var/log/mysql/error.log

# Recommended in standard MySQL setup

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

# Disabling symbolic-links is recommended to prevent assorted security risks

symbolic-links=0

# * IMPORTANT: Additional settings that can override those from this file!

#   The files must end with '.cnf', otherwise they'll be ignored.

#

!includedir /etc/mysql/conf.d/

3、创建master

docker run -d -e MYSQL_PASS=123456 --name mysql-master -v /usr/local/mysql/my-master.cnf:/etc/mysql/my.cnf -p 3306:3306 6cbe7615c508

4、创建slave

docker run -d -e MYSQL_PASS=123456 --name mysql-slave -v /usr/local/mysql/my-slave.cnf:/etc/mysql/my.cnf -p 3307:3306 6cbe7615c508

5、连接主库，创建一个用户并且用来同步数据

GRANT REPLICATION SLAVE ON *.* to 'admin'@'%' identified by '123456';

6、查看主库状态

show master status;

记住File、Position的值，如果没查到数据，请检查第一、第二步，配置问题。 

我查出来的是mysql-bin.000004、317

7、连接到从库，运行以下命令，设置主库链接

change master to master_host='xxx.xx.xx.xx',master_user='admin',master_password='123456',

master_log_file='mysql-bin.000004',master_log_pos=317,master_port=3306;

8、启动同步

start slave;

9、查看同步状态

show slave status;

10、如果看到Waiting for master send event.. 什么的就成功了，你现在在主库上的修改，都会同步到从库上