Docker安裝Mysql叢集
一.首先下載Docker
由於國內下載Github的很慢，推薦大家去
http://get.daocloud.io/ 去下載。根據自己的系統安裝，注意的是win10的最好安裝Docker for window ,win10以下的安裝 DockerToolBox。
二.配置Docker加速
推薦使用 https://www.daocloud.io/mirror#accelerator-doc 配置Docker加速，不加速的話下載速度可能只有幾十k。
三.下載mysql 映象
都進入命令列 一條Docker命令
docker pull mysql 用最新mysql映象的就行了
等待安裝完成。
docker imagesREPOSITORY TAG IMAGE ID CREATED SIZE
learn/ping latest d320964ebaf2 8 days ago 139.5 MB
php latest 84c6a05223c5 2 weeks ago 369.7 MB
centos latest 328 看到安裝的mysql映象即可
四.啟動mysql容器
1.先啟動一個主資料庫 mysqls1
docker run -p 6555:3306 --name mysqls1 -e MYSQL_ROOT_PASSWORD=123456 掛載一個宿機的資料夾上去方便修改mysql的配置，這裡大家可以去官網詳細查詢掛載的操作-v如果是windows需要配置shared dirves 這裡我共享了c盤，大家根據自己需要配置。
2.同理同上 掛載一個從資料庫 mysqls2
docker run -p 6556:3306 --name mysqls2 -e MYSQL_ROOT_PASSWORD=123456 -v c:/hosts/mysql.conf/mysql.conf.d:/hosts/mysql.conf/mysql.conf.d -d mysql3.檢視容器狀態是否開啟成功
docker ps正常的狀態是
大家可以檢視下先啟動容器再說
4.配置mysql配置
因為在上面我們掛載了宿機的一個資料夾到容器中了,在C:\hosts\mysql.conf\mysql.conf.d中新建一個檔案mysqld.cnf檔案對應mysql的mysqld配置，不同的mysql版本配置可能不同，我這選用了最新的mysql映象。
配置主資料庫
# Copyright (c) 2014, 2016, 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
#log-error = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log_bin = mysql-bin
server_id = 1然後進入主資料庫容器mysqls1
docker exec -i -t mysqls1 /bin/bash把我們的配置覆蓋主資料庫的配置即可，幾個命令搞定
cd /hosts/mysql.conf/mysql.conf.d
cp -r mysqld.cnf /etc/mysql/mysql.conf.d配置好主資料的配置了，從資料庫配置同上，主要就區分server_id就可以了。
# Copyright (c) 2014, 2016, 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
#log-error = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log_bin = mysql-bin
server_id = 2
同上修改了從資料庫配置
五.主從配置
1.先配置主資料配置吧。
進入主資料庫容器mysqls1
docker exec -i -t mysqls1 /bin/bash進入mysql
mysql -u root -p輸入密碼123456即可
然後建立使用者 mysync 密碼q123456 授權slave
GRANT REPLICATION SLAVE ON *.* to 'mysync'@'%' identified by 'q123456';
最後
show master status;
記錄下File和Position,主資料庫配置完成
2.從資料配置
同上 進入從資料庫容器，進入mysql
change master to master_host='192.168.1.139',master_user='mysync',master_password='q123456',master_log_file='mysql-bin.000002',master_log_pos=2769,master_port=6555;這裡根據自己配置修改 ，Ip等
配置好主資料庫資訊後開啟slave
start slave;正常應該是這樣
Slave_IO_Running: Yes
Slave_SQL_Running: YesError資訊都沒有，如果有error檢視一下錯誤資訊，解決一下。
好了這裡基本完成了 主從配置了，我們測試一下吧，為了方便不在黑視窗慢慢show databases create database了。直接上工具吧。
主資料庫的資料
從資料庫的資料
現在都是一樣的，我們在主資料加點資料
然後檢查從資料庫的配置
同步完成，檢查下程序正常
這個ip是docker分配本地區域網ip。檢查一切正常。至此docker安裝mysql叢集已經實現，docker對我們搭建叢集很方便了，以前要開虛擬機器來配置。
六.總結
1.涉及到docker的一些命令 pull,ps,exec,stop,start等，2.涉及到檔案掛載
3.涉及到mysql資料庫主從的一些配置。涉及不多 4.linux的一些常用命令cp cd ls等，綜合起來還是有點收穫的。
轉載請註明作者和原連結