node.js - 无法通过Docker-compose连接到MongoDB

Question

我正在尝试使用Docker-compose创建2个容器，其中一个包含Mongo serive，另一个包含NodeJS编写的Web服务。
这是我的docker-compose.yml文件:

version: '3'
services:
  mongo:
    build: ./docker_mongo/
    volumes: 
      - ./database:/data/db
    ports:
      - "27017:27017"
  node_app:
    build: ./docker_node/
    ports:
      - "3001:3001"
      - "16427:16427"
    command: npm start
    environment:
      - OS:PI
    depends_on:
      - mongo
      - mqtt

当我运行 docker-compose时，mongo服务显示以下消息:

mongo_1      | 2020-01-05T07:36:39.699+0000 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] MongoDB starting : pid=1 port=27017 dbpath=/data/db 64-bit host=90cbb91eebd0
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] db version v4.0.14
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] git version: 1622021384533dade8b3c89ed3ecd80e1142c132
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] OpenSSL version: OpenSSL 1.0.2g  1 Mar 2016
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] allocator: tcmalloc
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] modules: none
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] build environment:
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten]     distmod: ubuntu1604
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten]     distarch: x86_64
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten]     target_arch: x86_64
mongo_1      | 2020-01-05T07:36:39.703+0000 I CONTROL  [initandlisten] options: {}
mongo_1      | 2020-01-05T07:36:39.708+0000 I STORAGE  [initandlisten]
mongo_1      | 2020-01-05T07:36:39.708+0000 I STORAGE  [initandlisten] ** WARNING: Support for MMAPV1 storage engine has been deprecated and will be
mongo_1      | 2020-01-05T07:36:39.708+0000 I STORAGE  [initandlisten] **          removed in version 4.2. Please plan to migrate to the wiredTiger
mongo_1      | 2020-01-05T07:36:39.708+0000 I STORAGE  [initandlisten] **          storage engine.
mongo_1      | 2020-01-05T07:36:39.708+0000 I STORAGE  [initandlisten] **          See http://dochub.mongodb.org/core/deprecated-mmapv1
mongo_1      | 2020-01-05T07:36:39.708+0000 I STORAGE  [initandlisten]
mongo_1      | 2020-01-05T07:36:39.708+0000 I STORAGE  [initandlisten] Detected data files in /data/db created by the 'mmapv1' storage engine, so setting the active storage engine to 'mmapv1'.
mongo_1      | 2020-01-05T07:36:39.727+0000 I JOURNAL  [initandlisten] journal dir=/data/db/journal
mongo_1      | 2020-01-05T07:36:39.728+0000 I JOURNAL  [initandlisten] recover : no journal files present, no recovery needed
mongo_1      | 2020-01-05T07:36:39.730+0000 I STORAGE  [initandlisten]  WARNING: This file system is not supported. For further information see:
mongo_1      | 2020-01-05T07:36:39.730+0000 I STORAGE  [initandlisten]                  http://dochub.mongodb.org/core/unsupported-filesystems
mongo_1      | 2020-01-05T07:36:39.730+0000 I STORAGE  [initandlisten]          Please notify MongoDB, Inc. if an unlisted filesystem generated this warning.
mongo_1      | 2020-01-05T07:36:39.970+0000 I JOURNAL  [durability] Durability thread started
mongo_1      | 2020-01-05T07:36:39.971+0000 I JOURNAL  [journal writer] Journal writer thread started
mongo_1      | 2020-01-05T07:36:40.003+0000 I STORAGE  [initandlisten]  WARNING: This file system is not supported. For further information see:
mongo_1      | 2020-01-05T07:36:40.003+0000 I STORAGE  [initandlisten]                  http://dochub.mongodb.org/core/unsupported-filesystems
mongo_1      | 2020-01-05T07:36:40.003+0000 I STORAGE  [initandlisten]          Please notify MongoDB, Inc. if an unlisted filesystem generated this warning.
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten]
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten]
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] ** WARNING: This server is bound to localhost.
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] **          Remote systems will be unable to connect to this server.
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] **          Start the server with --bind_ip <address> to specify which IP
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] **          addresses it should serve responses from, or with --bind_ip_all to
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] **          bind to all interfaces. If this behavior is desired, start the
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten] **          server with --bind_ip 127.0.0.1 to disable this warning.
mongo_1      | 2020-01-05T07:36:40.003+0000 I CONTROL  [initandlisten]
mongo_1      | 2020-01-05T07:36:40.308+0000 I FTDC     [initandlisten] Initializing full-time diagnostic data capture with directory '/data/db/diagnostic.data'
mongo_1      | 2020-01-05T07:36:40.312+0000 I NETWORK  [initandlisten] waiting for connections on port 27017

这表明mongo服务已在 27017端口上就绪，但NodeJs服务器仍无法访问数据库:

node_app_1   | Error:  Unable to connect to database
node_app_1   | MongoTimeoutError: Server selection timed out after 30000 ms
node_app_1   |     at /node_app/app.js:84:20

在NodeJs服务器中，mongoDb使用docker-compose服务的名称连接到 mongodb://mongo:27017/docker的URL mongo。我也尝试了 localhost，但是没有用。

我已经在树莓派上尝试过了，并且可以正常工作(只是更改 mongo图像)。
Mongo Image on Pi
有人可以帮忙吗？

Answer 1

为了连接两个容器，首先，您必须了解Docker网络。您收到错误消息，可能是因为容器是隔离的。您可以通过多种方式使用不同的联网模式连接Docker容器，例如:

仅限主机的网络

桥接网络

在此处阅读更多信息 https://docs.docker.com/network/

您可以如下配置仅主机网络:
为每个服务包括 network_mode: host。

  version: '3'
    services:
      mongo:
        build: ./docker_mongo/
        network_mode: host
        volumes: 
          - ./database:/data/db
        ports:
          - "27017:27017"
      node_app:
        build: ./docker_node/
        network_mode: host
        ports:
          - "3001:3001"
          - "16427:16427"
        command: npm start
        environment:
          - OS:PI
        depends_on:
          - mongo
          - mqtt