文章目錄
安裝Docker
由於我用的是Windows10，所以我打開了Hyper-V，然後在Dcoker官網下載並安裝了Docker。
CentOS 之間使用 yum install docker 安裝docker然後使用systemctl start docker啓動服務，systemctl enable docker開機啓動docker服務。
使Docker容器和Windows10建立局域網連接
Docker創建一個局域網
docker network create --subnet=[IP]/[掩碼位數] 子網名稱
指令示例：
docker network create --subnet=192.168.100.0/24 homenet
在Windows10中將這個子網添加到路由表中 ，Linux重啓即可
route add -p [局域網ip] mask [子網掩碼] [經過網關（使用Docker默認網關）]
指令示例（管理員模式下運行指令）：
route add -p 192.168.100.0 mask 255.255.255.0 10.0.75.2
簡單Mysql持久化
預先準備
先啓動一個mysql，查看需要持久化的文件有哪些。
docker run -itd --net homenet --ip 192.168.100.10 --name mysql000 -e MYSQL_ROOT_PASSWORD=00000000 mysql
docker exec -it mysql000 /bin/bash
# find / -name "mysql"
然後發現了以下需要映射的文件
/etc/mysql/my.cnf
/var/lib/mysql
保存一份my.cnf文件到宿主機，掛載文件時需要用到
然後刪除剛纔創建的Mysql，刪除前順便測試下局域網有沒有用
mysql -h 192.168.100.10 -u root -p
[mysql]exit
docker stop mysql000
docker rm mysql000
啓動mysql
然後創建mysql容器，命令示例（在掛載過程中需要輸入Windows10密碼授權本地文件操作）：
docker run -itd --privileged=true --net homenet --ip 192.168.100.10 --name mysql000 -e MYSQL_ROOT_PASSWORD=00000000 -e MYSQL_USER="ovea" -e MYSQL_PASSWORD="00300100" -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL000/etc/my.cnf:/etc/mysql/my.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL000/varlib:/var/lib/mysql mysql
搭建MySQL集羣
預習準備
docker pull mysql/mysql-cluster
docker run -itd --net homenet --ip 192.168.100.10 --name mysql000 -e MYSQL_ROOT_PASSWORD=00000000 mysql/mysql-cluster ndbd
然後查找需要映射的文件
/var/lib/mysql
/var/lib/mysql-files/
/var/lib/mysql-keyring/
/etc/my.cnf
/etc/mysql-cluster.cnf
最後兩個文件保存一份到宿主機
docker stop mysql000
docker rm mysql000
修改配置文件
修改my.cnf [Linux下該文件權限應爲644或744]
主要是manager以外的節點使用的，ip指向manager節點的IP
[mysqld]
ndbcluster
ndb-connectstring=192.168.100.10
user=mysql
[mysql_cluster]
ndb-connectstring=192.168.100.10
修改mysql-cluster.cnf [Linux下該文件權限應爲644或744]
主要配置節點之間的關係和職責
# 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
[ndbd default]
NoOfReplicas=4
DataMemory=128M
IndexMemory=16M
[ndb_mgmd]
NodeId=1
hostname=192.168.100.10
datadir=/var/lib/mysql
[ndbd]
NodeId=2
hostname=192.168.100.11
datadir=/var/lib/mysql
[ndbd]
NodeId=3
hostname=192.168.100.12
datadir=/var/lib/mysql
[ndbd]
NodeId=4
hostname=192.168.100.13
datadir=/var/lib/mysql
[mysqld]
NodeId=5
hostname=192.168.100.14
啓動5個節點
Windows 指令示例
docker run -itd --privileged=true --net homenet --ip 192.168.100.10 --name mysql-mgmd-000 -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL000/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL000/varlib:/var/lib/mysql mysql/mysql-cluster ndb_mgmd
docker run -itd --privileged=true --net homenet --ip 192.168.100.11 --name mysql-node-000 -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL001/etc/my.cnf:/etc/my.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL001/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL001/varlib:/var/lib/mysql mysql/mysql-cluster ndbd
docker run -itd --privileged=true --net homenet --ip 192.168.100.12 --name mysql-node-001 -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL002/etc/my.cnf:/etc/my.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL002/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL002/varlib:/var/lib/mysql mysql/mysql-cluster ndbd
docker run -itd --privileged=true --net homenet --ip 192.168.100.13 --name mysql-node-002 -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL003/etc/my.cnf:/etc/my.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL003/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL003/varlib:/var/lib/mysql mysql/mysql-cluster ndbd
docker run -itd --privileged=true --net homenet --ip 192.168.100.14 --name mysql000 -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL004/etc/my.cnf:/etc/my.cnf -v /c/Users/OVEA/Documents/Docker/MySQL/MySQL004/varlib:/var/lib/mysql -e MYSQL_RANDOM_ROOT_PASSWORD=true mysql/mysql-cluster mysqld
Linux命令示例：
docker run -itd --privileged=true --net homenet --ip 192.168.100.10 --name mysql-mgmd-000 -v /home/ovea/Documents/Docker/MySQL/MySQL000/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL000/varlib:/var/lib/mysql mysql/mysql-cluster ndb_mgmd
docker run -itd --privileged=true --net homenet --ip 192.168.100.11 --name mysql-node-000 -v /home/ovea/Documents/Docker/MySQL/MySQL001/etc/my.cnf:/etc/my.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL001/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL001/varlib:/var/lib/mysql mysql/mysql-cluster ndbd
docker run -itd --privileged=true --net homenet --ip 192.168.100.12 --name mysql-node-001 -v /home/ovea/Documents/Docker/MySQL/MySQL002/etc/my.cnf:/etc/my.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL002/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL002/varlib:/var/lib/mysql mysql/mysql-cluster ndbd
docker run -itd --privileged=true --net homenet --ip 192.168.100.13 --name mysql-node-002 -v /home/ovea/Documents/Docker/MySQL/MySQL003/etc/my.cnf:/etc/my.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL003/etc/mysql-cluster.cnf:/etc/mysql-cluster.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL003/varlib:/var/lib/mysql mysql/mysql-cluster ndbd
docker run -itd --privileged=true --net homenet --ip 192.168.100.14 --name mysql000 -v /home/ovea/Documents/Docker/MySQL/MySQL004/etc/my.cnf:/etc/my.cnf -v /home/ovea/Documents/Docker/MySQL/MySQL004/varlib:/var/lib/mysql -e MYSQL_RANDOM_ROOT_PASSWORD=true mysql/mysql-cluster mysqld
必須一次啓動成功，否則將會導致無法正確運行！啓動完前一個節點再啓動下一個節點。
結果：
在日誌中找到密碼然後登錄
docker logs mysql000
docker exec mysql000 /bin/bash
# mysql -u root -p
需要把-v掛載除配置文件外的其他選項（持久化集羣）都取消掉才能正常打開mysqld服務，原因不明……而且錯誤也沒有寫入日誌中!
解決方案，先停止所有容器，然後全部啓動。(雖然這樣是啓動了，但是密碼就不知道了)
Windows10
docker stop $(docker ps -q)
docker start $(docker ps -a -q)
Linux
sudo docker stop $(sudo docker ps -q)
sudo docker start $(sudo docker ps -a -q)
參考資料
https://www.jianshu.com/p/cc837360c9e7