docker mysql8.0 主从复制

docker mysql8.0 主从复制

基于mysql8.0 配置的主从复制，排除一些坑。

安装docker

ubuntu18 安装最新版docker
如果能访问此链接，就按教程走，否则自行百度：访问docker连接
成功后继续

1. 更新索引包 ：
   sudo apt update
2. 通过HTTPS使用仓库(repository)安装:
   sudo apt install apt-transport-https ca-certificates curl software-properties-common
3. 添加Docker官方的GPG密钥:
   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
4. 添加源:
   sudo add-apt-repository "deb [arch=amd64] http://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"
5. 安装:
   sudo apt install docker-ce
6. 查看是否启动:
   systemctl status docker
   
7. 需要配置镜像加速，否则拉取镜像会很慢，本人用的阿里镜像加速，自己去阿里云申请配置即可，免费的：
   sudo vim /etc/docker/daemon.json
{ "registry-mirrors": ["××××××××××.mirror.aliyuncs.com"] }

配置主从复制

1. 拉取镜像（目前我拉取的最新版本是8.0.19）:
   $ sudo docker pull mysql
2. 查看进行:
   sudo docker images
   
3. 安装mysql-client，用于访问mysql容器数据库:
   $ sudo apt install mysql-client-core-5.7
4. 创建工作目录,保存mysql数据到本地:
   cd ~/
mkdir docker-mysql
cd docker-mysql
mkdir -p mysql-master/data mysql-master/cnf mysql-slave1/data mysql-slave1/cnf
5. 创建主从mysql配置文件:
   vim mysql-master/cnf /my.cnf
   ~ 主mysql配置

# 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

#
# 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
secure-file-priv= NULL
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# 主从配置服务期id
server_id       = 1
# 开启日志文件
log-bin         = mysql-bin
# 不参与主从的数据库名
binlog-ignore-db= mysql
# 需要进行 binlog 日志记录的数据库  `test`为你自己的数据库名称
binlog-do-db    = test
# Custom config should go here
!includedir /etc/mysql/conf.d/

~ 从mysql 配置

# 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

#
# 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
secure-file-priv= NULL
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# 主从配置服务期id
server_id       = 2
# 开启日志文件
log-bin         = mysql-bin
# 不参与主从的数据库名
binlog-ignore-db= mysql
# 需要进行 binlog 日志记录的数据库  `test`为你自己的数据库名称
binlog-do-db    = test
# Custom config should go here
!includedir /etc/mysql/conf.d/

6. 运行主myqsl容器(目录记得改成自己的):
   run 运行一个容器
   –name 后面是这个镜像的名称
   -p 3307:3306 3307表示映射到本机的端口号，306表示在这个容器中使用的端口
   -d 表示使用守护进程运行，即服务挂在后台
   sudo docker run -di -e MYSQL_ROOT_PASSWORD=123456 --name mysql-master -v /home/xiyeming/docker-mysql-data/mysql-master/data:/var/lib/mysql -v /home/xiyeming/docker-mysql-data/mysql-master/cnf/my.cnf:/etc/mysql/my.cnf -p 3307:3306 -d mysql
7. 运行从myqsl容器(目录记得改成自己的):
   sudo docker run -d -e MYSQL_ROOT_PASSWORD=123456 --name mysql-slave1 -v /home/xiyeming/docker-mysql-data/mysql-slave1/data:/var/lib/mysql -v /home/xiyeming/docker-mysql-data/mysql-slave1/cnf/my.cnf:/etc/mysql/my.cnf -p 3308:3306 mysql
8. 连接容器数据库:
   -h 连接的ip
   –port 连接的端口
   ~ 主：
   mysql -uroot -p123456 -h127.0.0.1 --port 3307
   ~ 从：
   mysql -uroot -p123456 -h127.0.0.1 --port 3308

• 数据库库配置:
  • 主库配置:
    • 创建账号：
    • create user 'slave1'@'%' identified by 'slave1';
    • 授权：
    • grant all privileges ON *.* TO 'slave1'@'%';
    • 验证方式修改为上一版的:
    • ALTER USER slave1@'%' IDENTIFIED WITH mysql_native_password BY 'slave1';
    • 刷新：
    • flush privileges;
    • 查看状态
    • mysql> show master status;
    • 
  • 从库配置
  • master_log_file 对应File
    master_log_pos对应Position
  • change master to master_host='192.168.1.102',master_user='slave1',master_password='slave1',master_log_file='mysql-bin.000003',master_log_pos=1298,master_port=3307;
  • start slave;
  • show slave status \G
  • 
  • 主从配置已完成，可以自己测试，在主库中写入数据，到从库中查看数据。