Docker安装MySQL主从

Docker安装MySQL主从

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

2、创建Slaver

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、master授权slaver链接

#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;

4、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='172.17.0.2',master_user='backup',master_password='123456',master_log_file='mysql-bin.000001',master_log_pos=0,master_port=3306;
  #3）、启动从库同步
	start slave;
  #4）、查看从库状态
	show slave status\G;

至此主从配置完成；