mongo:
        image: mongo:3.4.9
        environment:
            MONGO_DATA_DIR:             /data/db
            MONGO_INITDB_ROOT_USERNAME: ******
            MONGO_INITDB_ROOT_PASSWORD: ******
        volumes:
            - yyyyyy_data_mongo:/data/db
        #restart: always
        command: mongod --smallfiles
        mem_limit: 1g
        memswap_limit: 1g
        cpu_count: 2
        networks:
            main:
                aliases:
                    - docker_service_mongo