基于docker的MySQL主从复制

时间 2019-11-19

标签基于 docker mysql 主从复制栏目 Docker 繁體版

原文原文链接

1，环境

在linux环境上搭建html

2，版本

dockermysql

mysql：linux

wget https://dev.mysql.com/get/downloads/mysql-5.7.22-1.el7.i686.rpm-bundle.tarsql

3，安装mysql

cd /usr/local安装路径docker

wget https://dev.mysql.com/get/downloads/mysql-5.7.22-1.el7.i686.rpm-bundle.tarjson

tar -zxvf mysql-5.7.22-1.el7.i686.rpm-bundle.tarcentos

4，安装docker

docker的安装使用：bash

1. 安装dockerless

# yum install -y dockersocket

2. 启动docker

# systemctl start docker

3. 安装docker镜像

# docker pull [docker镜像地址]

使用阿里云镜像

修改/etc/docker/daemon.json

{

"registry-mirrors": ["https://uulfe4bd.mirror.aliyuncs.com"]

}

4. 修改完毕重启docker

https://dev.aliyun.com/search.html 查询镜像文件。

# systemctl restart docker

5，获取docker镜像

mysql安装须要创建在centos基础上全部在，docker中须要安装docker

# docker pull https://registry.cn-hangzhou.aliyuncs.com/moensun/centos7

查看建立的centos7镜像 docker images记录ID 3db94df3e006

6，建立docker容器

# docker run -tid 3db94df3e006（查看centos7镜像时能够看到） /usr/sbin/init

重命名容器名称

docker rename priceless_poitras mysql-master1

从新查看docker ps -a 容器名称修改完成

因为是作主从复制，那么应该建立两个容器mysql-master1 和mysql-slave2这里在建立mysql-slave2容器

（因为以前建立了mysql-slave1，此次就建立了mysql-slave2，名称本身命名都行。此次只是想写个博客，方便之后学习，也方便想学习的同窗，一主mysql-master1，一从mysql-slave2，后面搭建好的话，就能够根据本身需求搭建主主，多主多从了）

7，MySQL文件拷贝

Docker文件拷贝（容器<=>docker）

# docker cp 原路径 docker容器路径（系统=》docker）

# docker cp MySQL-server-5.6.38-1.el7.x86_64.rpm mysql_master2:/root/

# docker cp docker容器路径原路径（docker=》系统）

将以前mysql解压后的文件分别拷贝到mysql-master1和mysql-slave2
docker cp mysql-community-common-5.7.22-1.el7.x86_64.rpm mysql-master1:/root/
docker cp mysql-community-client-5.7.22-1.el7.x86_64.rpm mysql-master1:/root/
docker cp mysql-community-libs-5.7.22-1.el7.x86_64.rpm mysql-master1:/root/
docker cp mysql-community-server-5.7.22-1.el7.x86_64.rpm mysql-master1:/root/
docker cp mysql-community-server-5.7.22-1.el7.x86_64.rpm mysql-slave2:/root/
docker cp mysql-community-client-5.7.22-1.el7.x86_64.rpm mysql-slave2:/root/
docker cp mysql-community-libs-5.7.22-1.el7.x86_64.rpm mysql-slave2:/root/
docker cp mysql-community-common-5.7.22-1.el7.x86_64.rpm mysql-slave2:/root/

8，进入容器

# docker exec -it 容器名称 /bin/bash

# docker exec -it mysql_master1 /bin/bash

开启两个远程登陆窗口，分别进去主容器和从容器

主，docker exec -it mysql_master1 /bin/bash

从，docker exec -it mysql_slave2/bin/bash

9，MySQL主从复制

cd 到根目录

ll查看复制的mysql的rpm

安装mysql，安装mysql须要安装mysql依赖

（1）安装centos系统安装mysql依赖：

1. perl perl-Module-Build

2. autoconf

3. libaio

4. namuctl-libs

5. net-tools

yum install -y perl perl-Module-Build net-tools autoconf libaio numactl-libs

安装mysql

（2）在根目录下

rpm -ivh mysql-community-*.rpm

启动mysql

systemctl start mysqld

个人通常都会报错看日志是磁盘没有分配大小

须要vi /etc/my.cnf中添加innodb_buffer_pool_size = 8M

若是没有报错最好

第一次启动后会有个初始化的过程，会产生root帐户的随机密码。

cat /var/log/mysqld.log | grep password

链接mysql

mysql -uroot -pkzl\(kVo-w0lg

其中（须要转义

设置从新设置密码

注意：若是只想设置简单密码须要修改两个全局参数：

mysql> set global validate_password_length=1;set global validate_password_policy=0;

set password = password(‘你的密码’)

set password = password(‘123456’)

远程登录受权

mysql> grant all privileges on *.* to 'root'@'%' identified by '123456' with grant option;

mysql> flush privileges;

主从复制过程

（在主机上操做）：

vi /etc/my.cnf

配置文件my.cnf

[client]

port = 3306

socket = /var/lib/mysql/mysql.sock

[mysqld]

#不管主机仍是从机server-id不能相同

server-id = 2

port = 3306

##原先有的话就能够去掉

datadir = /var/lib/mysql

socket = /var/lib/mysql/mysql.sock

default-storage-engine = InnoDB

log-bin = mysql-bin

log-bin-index = mysql-bin.index

relay-log = mysql-relay

relay-log-index = mysql-relay.index

expire-logs-days = 10

max-binlog-size = 100M

max_binlog_cache_size = 8M

log-slave-updates = 1

binlog_cache_size = 4M

# use MIXED binlog

binlog_format = MIXED

#binlog_format = ROW

#replicate-do-db = db%.%

#replicate-ignore-db = mysql.%

# ignore tables

replicate-wild-ignore-table = mysql.%

sync_binlog = 1

relay_log_recovery = 1

log_slave_updates = 1

skip-name-resolve

sql_mode=STRICT_TRANS_TABLES

[mysqldump]

quick

max_allowed_packet = 32M

1. 建立同步复制的用户

mysql> create user 'repl'@'172.17.0.%' identified by '123456';

2. 给同步复制用户赋权

mysql> grant replication slave on *.* to 'repl'@'172.17.0.%' identified by '123456';

mysql> flush privileges;

3. 开启binlog

配置时候注意几个坑：

Replication-do-db的坑，若是多个库则使用多行Replication-do-db进行配置

Replication-ignore-db的坑，若是忽略多个库则使用多行Replication-ignore-db进行配置

4. 重启mysql

#systemctl restart mysqld

5. 链接mysql

show master status \G;

从机操做：

vi /etc/my.cnf

配置文件my.cnf

[client]

port = 3306

socket = /var/lib/mysql/mysql.sock

[mysqld]

#不管主机仍是从机server-id不能相同

server-id = 20

port = 3306

##原先有的话就能够去掉

datadir = /var/lib/mysql

socket = /var/lib/mysql/mysql.sock

default-storage-engine = InnoDB

log-bin = mysql-bin

log-bin-index = mysql-bin.index

relay-log = mysql-relay

relay-log-index = mysql-relay.index

expire-logs-days = 10

max-binlog-size = 100M

max_binlog_cache_size = 8M

log-slave-updates = 1

binlog_cache_size = 4M

# use MIXED binlog

binlog_format = MIXED

#binlog_format = ROW

#replicate-do-db = db%.%

#replicate-ignore-db = mysql.%

# ignore tables

replicate-wild-ignore-table = mysql.%

sync_binlog = 1

relay_log_recovery = 1

log_slave_updates = 1

skip-name-resolve

sql_mode=STRICT_TRANS_TABLES

[mysqldump]

quick

max_allowed_packet = 32M

链接mysql操做：

1. Stop slave；

主从复制的最关键语句:

2. Change master to

Master_host=’172.17.0.2’,

Master_user=’repl’,

Master_password=’123456’,

Master_log_file=’mysql-bin.000001’,

Master_log_pos=120;

3. Start slave；

4.show slave status \G;

测试

主mysql：create database db1;

从 mysql> show databases;

从mysql上建立了db1