docker安装mysql主从复制

参与文献 http://blog.youkuaiyun.com/qq362228416/article/details/48569293

docker 安装mysql主从备份

下载mysql镜像  我们获取最新镜像

环境准备如下：

服务器：  我的服务器ip: 47.94.175.83  

保证3307端口和3308端口没有被占用

在主机上安装docker之后运行  从官网拉取最新镜像

docker pull mysql:latest

准备配置文件：

   

命令如下：

   cd /

   touch  my-m.cnf

   touch  my-s.cnf

开始编辑文件

 

1，首创创两个文件 vi my-m.cnf（主库配置），vi  my-s.cnf（从库配置）
my-m.cnf内容如下

# 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/

 
 
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主要是这两行，只需要在原来的配置里面加上就行

log-bin = mysql-bin 
server-id = 1 
 
 
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my-s.cnf内容如下

# 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/

 
 
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同样，主要的是这两行

log-bin = mysql-bin 
server-id = 2

2，OK，有了配置文件，就可以启动MySQL的了，先启动主库

$ docker run -d -e MYSQL_ROOT_PASSWORD=admin --name mysql-master -v /soft/my-m.cnf:/etc/mysql/my.cnf -p 3307:3306 mysql
 
 
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3，启动从库

$ docker run -d -e MYSQL_ROOT_PASSWORD=admin --name mysql-slave -v /soft/my-s.cnf:/etc/mysql/my.cnf -p 3308:3306 mysql
 
 
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如图4所示，连接主库，并运行以下命令，创建一个用户用来同步数据

$ GRANT REPLICATION SLAVE ON *.* to 'backup'@'%' identified by '123456';
 
 
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5，查看主库状态

$ show master status;
 
 
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记住文件，位置的值，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.000003,436

如图6所示，连接到从库，运行以下命令，设置主库链接

$ change master to master_host='47.94.175.83',master_user='backup',master_password='123456',
master_log_file='mysql-bin.000003',master_log_pos=436,master_port=3307;
 
 
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7，启动同步

$ start slave;
 
 
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8，查看同步状态

$ show slave status
 
 
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如果看到等待主发送事件..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