docker mysql 主从配置【zoues.com】

1、首先创建两个文件/etc/my-m.cnf（主库配置） 、/etc/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_timestamplog-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
bind-address = 0.0.0.0
#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/

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 

以及修改：

bind-address = 0.0.0.0

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_timestamplog-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
bind-address = 0.0.0.0
#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/

同样，主要的是这两行

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

以及修改：

bind-address = 0.0.0.0

2、OK，有了配置文件，就可以启动MySQL了，先创建并启动主库。

sudo docker run -d -e MYSQL_ROOT_PASSWORD=wht111 --name mysql-master   /
-v /etc/my-m.cnf:/etc/mysql/my.cnf -p 3307:3306 mysql

3、创建并启动从库。

sudo docker run -d -e MYSQL_ROOT_PASSWORD=wht111 --name mysql-slave   /
-v /etc/my-s.cnf:/etc/mysql/my.cnf -p 3308:3306 mysql

4、查看主库ip地址，连接主库，并创建一个用户用来同步数据：

sudo docker inspect -f "{{.NetworkSettings.IPAddress}}" mysql-maste

mysql -h 172.17.0.2 -uroot -pwht111；
1

GRANT REPLICATION SLAVE ON *.* to 'backup'@'%' identified by '123456';
1

5、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。

6、以上面同样的方法连接到从库，运行以下命令，设置主库链接：

change master to master_host='172.17.0.2',master_user='backup',master_password='123456', master_log_file='mysql-bin.000003',master_log_pos=431,master_port=3306;

7、启动同步，并查看同步状态，查看复制线程：

 start slave;
 show slave status;
 show processlist;

8、登录主库，并查看复制线程：

 show processlist;

如果看到Master has sent all binlog to slave; waiting for more updates 什么的就成功了，现在在主库上的修改，都会同步到从库上。