信号量无法连接到数据库

Question

version: '3'
services:
  mysql:
    image: mysql
    environment:
      MYSQL_DATABASE: 'semaphore'
      MYSQL_ALLOW_EMPTY_PASSWORD: 'true'
    hostname: mysql
    ports:
      - 6603:3306
    volumes:
      - /opt/data/mysql:/var/lib/mysql
    networks:
      - semaphore_mysql

  semaphore:
    image: dsmorse/semaphore-docker:latest
    expose:
      - 3000
    ports:
      - 8500:3000
    links:
      - mysql:mysql
    networks:
      - semaphore_mysql

networks:
  semaphore_mysql:
    driver: bridge

我正在尝试使用docker-compose安装信号灯。错误是信号量无法连接到数据库。

错误：无法连接到数据库！ semaphore_1 |拨打tcp：3306：getsockopt：连接被拒绝