Docker搭建MySQL集群环境

2022-06-02 01:23| 来源: 网络整理| 查看: 265

文章目录安装Docker使Docker容器和Windows10建立局域网连接Docker创建一个局域网在Windows10中将这个子网添加到路由表中，Linux重启即可简单Mysql持久化预先准备启动mysql 搭建MySQL集群预习准备修改配置文件修改my.cnf [Linux下该文件权限应为644或744]修改mysql-cluster.cnf [Linux下该文件权限应为644或744] 启动5个节点参考资料

安装Docker

由于我用的是Windows10，所以我打开了Hyper-V，然后在Dcoker官网下载并安装了Docker。

CentOS 之间使用 yum install docker 安装docker然后使用systemctl start docker启动服务，systemctl enable docker开机启动docker服务。

使Docker容器和Windows10建立局域网连接 Docker创建一个局域网 docker network create --subnet=[IP]/[掩码位数] 子网名称

指令示例：

docker network create --subnet=192.168.100.0/24 homenet 在Windows10中将这个子网添加到路由表中，Linux重启即可 route add -p [局域网ip] mask [子网掩码] [经过网关（使用Docker默认网关）]

指令示例（管理员模式下运行指令）：

route add -p 192.168.100.0 mask 255.255.255.0 10.0.75.2 简单Mysql持久化预先准备

先启动一个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"

然后发现了以下需要映射的文件 /etc/mysql/my.cnf /var/lib/mysql 保存一份my.cnf文件到宿主机，挂载文件时需要用到

然后删除刚才创建的Mysql，删除前顺便测试下局域网有没有用

mysql -h 192.168.100.10 -u root -p [mysql]exit docker stop mysql000 docker rm mysql000 启动mysql

然后创建mysql容器，命令示例（在挂载过程中需要输入Windows10密码授权本地文件操作）：

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集群预习准备 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

然后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 最后两个文件保存一份到宿主机

docker stop mysql000 docker rm mysql000 修改配置文件修改my.cnf [Linux下该文件权限应为644或744]

主要是manager以外的节点使用的，ip指向manager节点的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下该文件权限应为644或744]

主要配置节点之间的关系和职责

# 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 启动5个节点

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

必须一次启动成功，否则将会导致无法正确运行！启动完前一个节点再启动下一个节点。结果：启动集群启动完成后在日志中找到密码然后登录

docker logs mysql000 docker exec mysql000 /bin/bash # mysql -u root -p

需要把-v挂载除配置文件外的其他选项（持久化集群）都取消掉才能正常打开mysqld服务，原因不明……而且错误也没有写入日志中!

解决方案，先停止所有容器，然后全部启动。(虽然这样是启动了，但是密码就不知道了) 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)

启动所有集群

参考资料

https://www.jianshu.com/p/cc837360c9e7

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