docker-compose.yaml 中的 ports 节点已对应端口，数据库还是连不上

version: '3' services: app: image: registry.cn-hangzhou.aliyuncs.com/mdpublic/mingdaoyun-community:2.4.2 environment: MINIO_DOMAIN: www.yunbg.top:8082/file TLS: "true" ENV_MINGDAO_PROTO: "https" ENV_MINGDAO_HOST: "www.yunbg.top" ENV_MINGDAO_PORT: "8082" COMPlus_ThreadPool_ForceMinWorkerThreads: 100 COMPlus_ThreadPool_ForceMaxWorkerThreads: 500 ports: 8880:8880 3306:3306 27017:27017 6379:6379 9092:9092 9000:9000 9200:9200 volumes: ./volume/data/:/data/ ./volume/tmp/:/usr/local/MDPrivateDeployment/wwwapi/tmp/ /usr/share/zoneinfo/Etc/GMT-8:/etc/localtime ../data:/data/mingdao/data doc: image: registry.cn-hangzhou.aliyuncs.com/mdpublic/mingdaoyun-doc:1.2.0 docker-compose.yaml 中的 ports 节点已对应端口，数据库还是连不上 ，配置文件如上，这是什么原因？用命令查看，3306 端口和 27017 端口都未被占用