在两个不同docker中配置的链接容器组成文件

docker-compose 配置:

db.yml :

version: '3'
networks:
    default:
        external:
            name: backend

volumes:
    mongo_data:

services:
    mongodb:
        image: mongodb
        container_name: mongodb
        restart: always
        ports:
            - 27017:27017
        networks:
            - backend
        volumes:
            - mongo_data:/data/db

admin.yml :

version: '3'
networks:
    default:
        external:
            name: backend

volumes:
    mongo_data:

services:
    mongoclient:
        image: mongoclient/mongoclient
        restart: always
        ports:
            - 3000:3000
        networks:
            - backend
        depends_on:
            - mongodb
        links:
            - mongodb

这不起作用,因为链接容器未在同一文件中配置。但是有没有一种方法可以达到类似的效果呢?