我试图弄清楚如何使用docker-compose.yml和2个从sql dump导入的数据库来实现docker。

httpd:
    container_name: webserver
    build: ./webserver/
    ports:
        - 80:80
    links:
        - mysql
        - mysql2
    volumes_from:
        - app

mysql:
    container_name: sqlserver
    image: mysql:latest
    ports:
        - 3306:3306
    volumes:
        - ./sqlserver:/docker-entrypoint-initdb.d
    environment:
        MYSQL_ROOT_PASSWORD: root
        MYSQL_DATABASE: dbname1
        MYSQL_USER: dbuser
        MYSQL_PASSWORD: dbpass

mysql2:
    extends: mysql
    container_name: sqlserver2
    environment:
        MYSQL_ROOT_PASSWORD: root
        MYSQL_DATABASE: dbname2
        MYSQL_USER: dbuser
        MYSQL_PASSWORD: dbpass

app:
    container_name: webdata
    image: php:latest
    volumes:
        - ../php:/var/www/html
    command: "true"

以上返回以下内容：

Kronos:mybuild avanche$ ./run.sh 
Creating sqlserver
Creating webdata
Creating sqlserver2

ERROR: for mysql2  driver failed programming external connectivity on endpoint sqlserver2 (6cae3dfe7997d3787a8d59a95c1b5164f7431041c1394128c14e5ae8efe647a8): Bind for 0.0.0.0:3306 failed: port is already allocated
Traceback (most recent call last):
  File "<string>", line 3, in <module>
  File "compose/cli/main.py", line 63, in main
AttributeError: 'ProjectError' object has no attribute 'msg'
docker-compose returned -1

基本上，我试图在单个docker compose文件中获取整个堆栈设置，创建2个数据库并导入相应的sql转储。有人有什么建议吗？