MySQL搭建主从集群详细步骤~

一、 Docker安装MySQL搭建主从

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

docker run  -p 3306:3306  很多  -d  --name haha   mysql:5.7

Docker启动容器的数据部分一定挂载出来

1、创建Master

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/conf.d \
-e MYSQL_ROOT_PASSWORD=root \
--restart=always \
-d mysql:5.7
# 参数说明  /etc/my.cnf   任意的xxx.cnf 只要放在 /etc/mysql/conf.d 目录下，mysql也能认为是他的配置文件
# -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
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
#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  #主库是写库

#可以同步的库，master只需要记录哪些库的二进制日志
binlog-do-db=hello
binlog-do-db=world

#不用同步的库
replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema

重启docker restart 容器ID|容器name

2、创建Slaver01

docker run -p 3308:3306 --name mysql-slaver-01 \
-v /mydata/mysql/slaver01/log:/var/log/mysql \
-v /mydata/mysql/slaver01/data:/var/lib/mysql \
-v /mydata/mysql/slaver01/conf:/etc/mysql/conf.d \
-e MYSQL_ROOT_PASSWORD=root \
--restart=always \
-d mysql:5.7 

#修改slave基本配置
vim /mydata/mysql/slaver01/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

#添加master主从复制slaver01部分配置
server_id=2
read-only=1
relay-log=mysql-relay

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

3、创建Slaver02

docker run -p 3309:3306 --name mysql-slaver-02 \
-v /mydata/mysql/slaver02/log:/var/log/mysql \
-v /mydata/mysql/slaver02/data:/var/lib/mysql \
-v /mydata/mysql/slaver02/conf:/etc/mysql/conf.d \
-e MYSQL_ROOT_PASSWORD=root \
--restart=always \
-d mysql:5.7 

#修改slave基本配置
vim /mydata/mysql/slaver02/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

#添加master主从复制slaver02部分配置
server_id=3
read-only=1
relay-log=mysql-relay

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

4、master授权slaver链接

1、进入master容器

docker exec -it mysql-master /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 'slave'@'%' IDENTIFIED BY '123456';

3、查看master状态

show master status\G;

5、slaver01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='192.168.119.159',master_user='slave',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;

3、查看从库状态

show slave status\G;

6、slaver02同步master数据

1、进入slaver容器

docker exec -it mysql-slaver-02 /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='192.168.119.159',master_user='slave',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;

3、查看从库状态

show slave status\G;

至此主从配置完成