Docker搭建MySQL双主复制详细教程

mkdir -p master1-data master2-data

version: '3.7'

services:
  mysql-master1:
    image: mysql:5.7.36
    container_name: mysql-master1
    environment:
      MYSQL_ROOT_PASSWORD: rootpassword
      MYSQL_DATABASE: mydb
    volumes:
      - ./master1-data:/var/lib/mysql
    ports:
      - "3306:3306"
    command: --server-id=1 --log-bin=mysql-bin --gtid-mode=ON --enforce-gtid-consistency=ON

  mysql-master2:
    image: mysql:5.7.36
    container_name: mysql-master2
    environment:
      MYSQL_ROOT_PASSWORD: rootpassword
      MYSQL_DATABASE: mydb
    volumes:
      - ./master2-data:/var/lib/mysql
    ports:
      - "3307:3306"
    command: --server-id=2 --log-bin=mysql-bin --gtid-mode=ON --enforce-gtid-consistency=ON

volumes:
  master1-data:
  master2-data:

docker pull mysql:5.7.36

docker-compose up -d

docker exec -it mysql-master1 bash

mysql -u root -p

CREATE USER 'replica'@'%' IDENTIFIED BY 'replica_password';
GRANT REPLICATION SLAVE ON *.* TO 'replica'@'%';
FLUSH PRIVILEGES;

SHOW MASTER STATUS;

docker exec -it mysql-master2 bash

mysql -u root -p

CREATE USER 'replica'@'%' IDENTIFIED BY 'replica_password';
GRANT REPLICATION SLAVE ON *.* TO 'replica'@'%';
FLUSH PRIVILEGES;

SHOW MASTER STATUS;

docker exec -it mysql-master1 bash

mysql -u root -p

CHANGE MASTER TO
  MASTER_HOST='mysql-master2',
  MASTER_USER='replica',
  MASTER_PASSWORD='replica_password',
  MASTER_LOG_FILE='mysql-bin.000001', -- 使用第二个主数据库的File值
  MASTER_LOG_POS=154; -- 使用第二个主数据库的Position值

START SLAVE;

docker exec -it mysql-master2 bash

mysql -u root -p

CHANGE MASTER TO
  MASTER_HOST='mysql-master1',
  MASTER_USER='replica',
  MASTER_PASSWORD='replica_password',
  MASTER_LOG_FILE='mysql-bin.000001', -- 使用第一个主数据库的File值
  MASTER_LOG_POS=154; -- 使用第一个主数据库的Position值

START SLAVE;