Docker安装MySQL集群【读写分离】

Centos7系统Docker安装

1、下载mysql镜像

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 docker search mysql

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 docker pull mysql:5.7

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docker images

2、创建Master实例并启动

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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

-p 3307:3306：将容器的3306端口映射到主机的3307端口
-v /mydata/mysql/master/conf:/etc/mysql：将配置文件夹挂在到主机
-v /mydata/mysql/master/log:/var/log/mysql：将日志文件夹挂载到主机
-v /mydata/mysql/master/data:/var/lib/mysql/：将配置文件夹挂载到主机
-e MYSQL_ROOT_PASSWORD=root：初始化root用户的密码

修改master****基本配置

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

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[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

注意：skip-name-resolve一定要加，不然连接mysql会超级慢

3、创建Slave实例并启动

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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 

修改slave****基本配置

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

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[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

*4、添加master**主从复制部分配置*

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

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server_id=1
log-bin=mysql-bin
read-only=0
binlog-do-db=gmall_ums
binlog-do-db=gmall_pms
binlog-do-db=gmall_oms
binlog-do-db=gmall_sms
binlog-do-db=gmall_cms


replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema

重启容器

5、添加Slave主从复制部分配置

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server_id=2
log-bin=mysql-bin
read-only=1
binlog-do-db=gmall_ums
binlog-do-db=gmall_pms
binlog-do-db=gmall_oms
binlog-do-db=gmall_sms
binlog-do-db=gmall_cms


replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema

重启容器

6、为master授权用户来他的同步数据

1、进入主库

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docker exec -it 4fdd7f265228 /bin/bash

2、进入主库mysql数据库

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 mysql -u root -p

** 1）、授权root可以远程访问（主从无关，为了方便我们远程连接mysql）**

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

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flush privileges;

** 2）、添加用来同步的用户**

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

3）、查看数据库的状态

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   show master status\G;

3、进入从库mysql数据库

** 1）、授权root可以远程访问（主从无关，为了方便我们远程连接mysql）**

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

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flush privileges;

** 2）、设置主库连接**

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change master to master_host='192.168.116.129',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**

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start slave;

** 4）、查看从库状态**

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     show slave status\G;

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**

演示效果

Centos7系统Docker安装

1、下载mysql镜像

2、创建Master实例并启动

参数说明

3、创建Slave实例并启动

4、添加master****主从复制部分配置

5、添加Slave主从复制部分配置

6、为master授权用户来他的同步数据

*4、添加master**主从复制部分配置*