docker实现mysql主从复制的示例代码

docker pull mysql:8.0.26

mkdir -p /home/apps/mysql-master/{config,log,data}

docker run -d --name mysql-master \
--restart=always \
--privileged=true \
-p 3310:3306 \
-v /home/apps/mysql-master/config:/etc/mysql/conf.d \
-v /home/apps/mysql-master/log:/var/log/mysql \
-v /home/apps/mysql-master/data:/var/lib/mysql \
-e MYSQL_ROOT_PASSWORD=123456 \
mysql:8.0.26

vim /home/apps/mysql-master/config/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

# 创建目录
mkdir -p /home/apps/mysql-slave-01/{config,log,data}

# 启动容器
docker run -d --name mysql-slave-01 \
--restart=always \
--privileged=true \
-p 3310:3306 \
-v /home/apps/mysql-slave-01/config:/etc/mysql/conf.d \
-v /home/apps/mysql-slave-01/log:/var/log/mysql \
-v /home/apps/mysql-slave-01/data:/var/lib/mysql \
-e MYSQL_ROOT_PASSWORD=123456 \
mysql:8.0.26


# 修改Slave基本配置
vim /home/apps/mysql-slave-01/config/my.cnf

# 添加以下内容
[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

vim /home/apps/mysql-master/config/my.cnf
server_id=1

# 开启二进制日志
log-bin=mysql-bin
read-only=0

# 需要同步的数据库
binlog-do-db=rapid-cloud
binlog-do-db=rapid-cloud-test

# 需要忽略的数据库
replicate-ignore-db=mysql
replicate-ignore-db=sys
replicate-ignore-db=information_schema
replicate-ignore-db=performance_schema

docker restart mysql-master

vim /home/apps/mysql-slave-01/config/my.cnf

server_id=2
log-bin=mysql-bin
read-only=1
binlog-do-db=rapid-cloud
binlog-do-db=rapid-cloud-test

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

docker restart mysql-slave-01

# 进入容器
docker exec -it mysql-master /bin/bash

# 进入主库mysql数据库
mysql -u root -p

# 授权root可以远程访问（ 主从无关，为了方便我们远程连接mysql）

# 授权远程
ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '123456';

# 刷新
flush privileges;


# 创建backup用户

# 应先创建新用户
create user 'backup'@'%' identified by '123456';

# 执行授权
grant all privileges on *.* to 'backup'@'%';

# 刷新
flush privileges;

# 授权远程
ALTER USER 'backup'@'%' IDENTIFIED WITH mysql_native_password BY '123456';

# 刷新
flush privileges;

# 查看主库状态
show master status;

# 进入容器
docker exec -it mysql-slave-01 /bin/bash

# 进入主库mysql数据库
mysql -u root -p

change master to master_host='192.168.3.13',master_user='backup',master_password='123456',master_log_file='mysql-bin.000001',master_log_pos=0,master_port=3310;

purge master logs to'mysql-bin.000001';

# 开始同步
start slave;

# 停止同步
# stop slave;

# 查看同步状态
show slave status\G;