详解用Docker构建MySQL主从环境

version: "3"
services:
 mysql-master:
 build:
  context: ./
  dockerfile: mysql/master/Dockerfile
 container_name: mysql-master
 volumes:
  - ./mysql/master/data:/var/lib/mysql
 restart: always
 ports:
  - 3305:3306
 links:
  - mysql-slave

 mysql-slave:
 build:
  context: ./
  dockerfile: mysql/slave/Dockerfile
 container_name: mysql-slave
 volumes:
  - ./mysql/slave/data:/var/lib/mysql
 restart: always
 ports:
  - 3306:3306

[mysqld]
server_id=100
binlog-ignore-db=mysql
log-bin=replicas-mysql-bin
binlog_cache_size=1M
binlog_format=mixed
slave_skip_errors=1062

# 我的 MySQL 为 8.x，需要如下配置
default_authentication_plugin=mysql_native_password
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci

FROM mysql:latest
ADD ./mysql/master/cluster.cnf /etc/mysql/conf.d/cluster.cnf
ENV MYSQL_ROOT_PASSWORD=password

[mysqld]
server_id=101
binlog-ignore-db=mysql
binlog_cache_size=1M
binlog_format=mixed
slave_skip_errors=1062
relay_log=replicas-mysql-relay-bin
log_slave_updates=1
read_only=1

# 我的 MySQL 为 8.x，需要如下配置
default_authentication_plugin=mysql_native_password
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci

FROM mysql:latest
ADD ./mysql/slave/cluster.cnf /etc/mysql/conf.d/cluster.cnf
ENV MYSQL_ROOT_PASSWORD=password

docker-compose up -d mysql-master mysql-slave

CHANGE MASTER TO
 MASTER_HOST='mysql-master',
 MASTER_USER='root',
 MASTER_PASSWORD=你设置的密码,
 MASTER_LOG_FILE=上一步得到的 File 参数,
 MASTER_LOG_POS=上一步得到的 Position 参数;