Docker安装模拟MySQL集群

一、Docker安装模拟MySQL集群

1、下载镜像

docker pull mysql:5.7

2、创建Master实例并启动

docker run -p 3306:3306 --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配置文件

修改master基本配置
vim /mydata/mysql/master/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
#跳过域名解析 注意:skip-name-resolve一定要加,不然连接mysql会超级慢


添加master主从复制部分配置
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 #忽略的数据库
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema

3、创建Slave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

修改slave配置文件

修改slave基本配置
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 
修改slave基本配置
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 

4、为master授权用户来他的同步数据

1、进入master容器
docker exec -it mysql /bin/bash

2、进入mysql内部 (mysql –uroot -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)
    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、配置slaver同步master数据

1、进入slaver容器
docker exec -it mysql-slaver-01 /bin/bash
2、进入mysql内部(mysql –uroot -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)
     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='192.168.159.128',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
      show slave status\G;

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

 

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