Docker安装模拟MySQL集群

1下载镜像文件

docker pull mysql:5.7

  

2创建主服务器实例并启动

docker run -p 3307:3306 --name mysql-master -v /mydata/mysql/master/log:/var/log/mysql -v /mydata/mysql/master/data:/var/lib/mysql -v /mydata/mysql/master/conf:/etc/mysql -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7 

  

参数说明

l -p 3307:3306:将容器的3306端口映射到主机的3307端口

l -v /mydata/mysql/master/conf:/etc/mysql:将配置文件夹挂在到主机

l -v /mydata/mysql/master/log:/var/log/mysql:将日志文件夹挂载到主机

l -v /mydata/mysql/master/data:/var/lib/mysql/:将配置文件夹挂载到主机

l -e MYSQL_ROOT_PASSWORD=root:初始化root用户的密码

 

MySQL配置

vim /mydata/mysql/conf/my.cnf
[client]
default-character-set=utf8
 
[mysql]
default-character-set=utf8
 
[mysqld]
init_connect=‘SET collation_connection = utf8_unicode_ci‘
init_connect=‘SET NAMES utf8‘
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake
skip-name-resolve
server_id=1    #mysql服务id
log-bin=mysql-bin
read-only=0    #0代表可读可写

binlog-do-db=XXX   #需要同步的XXX表

#忽略同步得表
replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema

  

 

3、创建从服务器实例并启动

docker run -p 3316:3306 --name mysql-slaver-01 -v /mydata/mysql/slaver/log:/var/log/mysql -v /mydata/mysql/slaver/data:/var/lib/mysql -v /mydata/mysql/slaver/conf:/etc/mysql -e MYSQL_ROOT_PASSWORD=root -d mysql:5.7 

  

MySQL配置

vim /mydata/mysql/slaver/conf/my.cnf

[client]
default-character-set=utf8
 
[mysql]
default-character-set=utf8
 
[mysqld]
init_connect=‘SET collation_connection = utf8_unicode_ci‘
init_connect=‘SET NAMES utf8‘
character-set-server=utf8
collation-server=utf8_unicode_ci
skip-character-set-client-handshake
skip-name-resolve 

  

server_id=2    #mysql服务id

log-bin=mysql-bin 

read-only=1  #1代表只读不写

binlog-do-db=XXX   #需要同步的XXX表

# 忽略同步的表
replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema

  

重启

docker restart "服务名称 or 服务id前3位"

 

4、进入主mysql容器中 操作mysql

docker exec -it mysql-master /bin/bash

  

1)、授权root可以远程访问

 

grant all privileges on *.* to ‘root‘@‘%‘ identified by ‘root‘ with grant option;
flush privileges;

 

 

2)、添加用来同步的用户

 

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

 

  

3)、查看master状态

 

show master status\G;

 

  

5、进入从mysql容器中 操作mysql

docker exec -it mysql-slaver-01 /bin/bash

1)、授权root可以远程访问

grant all privileges on *.* to ‘root‘@‘%‘ identified by ‘root‘ with grant option;
flush privileges;

 

2)、设置主库连接

 

change master to master_host=‘192.168.31.128‘,master_user=‘backup‘,master_password=‘123456‘,master_log_file=‘mysql-bin.000001‘,master_log_pos=0,master_port=3307;

 

 

3)、启动从库同步

 

start slave;

 

  

 4)、查看从库状态

Docker安装模拟MySQL集群

 

 

至此主从配置完成;

总结

1)、主从数据库在自己配置文件中声明需要同步哪个数据库,忽略哪个数据库等信息。并且server-id不能一样

2)、主库授权某个账号密码来同步自己的数据

3)、从库使用这个账号密码连接主库来同步数据

 

Docker安装模拟MySQL集群

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