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node.js - 无法从主机访问副本集 mongodb(docker)

问题描述

我的 nodejs 代码在我的主机（MACOS）上运行，它试图连接到在 docker 中运行的 mongodb 副本集。

version: "3"

services:
  redis_master:
    image: redis:2.8
    volumes:
      - "/Users/hiteshbaldaniya/docker-redis/master:/data/"
    ports:
      - "6379:6379"
    networks:
      - database

  mongodb_primary:
    build:
      context: ./
      dockerfile: DockerfileDB
    command: mongod --replSet "hdbrs" --dbpath "/data/27017/" --port 27017
    ports:
      - "27017:27017"
    volumes:
      - "/Users/hiteshbaldaniya/docker-mongodb/:/data/"
    networks:
      - database

  mongodb_secondary1:
    build:
      context: ./
      dockerfile: DockerfileDB
    command: mongod --replSet "hdbrs" --dbpath "/data/27018/" --port 27018
    ports:
      - "27018:27018"
    volumes:
      - "/Users/hiteshbaldaniya/docker-mongodb/:/data/"
    networks:
      - database

  mongodb_secondary2:
    build:
      context: ./
      dockerfile: DockerfileDB
    command: mongod --replSet "hdbrs" --dbpath "/data/27019/" --port 27019
    ports:
      - "27019:27019"
    volumes:
      - "/Users/hiteshbaldaniya/docker-mongodb/:/data/"
    networks:
      - database

  hdb_nginx:
    build:
      context: ./nginx/
      dockerfile: DockerfileNginx.dev
    ports:
      - "8081:80"
    volumes:
      - "/Users/hiteshbaldaniya/logs/docker-nginx/:/var/log/nginx/"
    networks:
      - backend

networks:
  backend:
    driver: bridge
  database:
    driver: bridge

我的主机上的所有 3 个端口都是打开的，我尝试使用 telnet，我也能够连接到所有端口。

我的 nodejs 应用程序使用 mongodb-node-driver 并使用以下配置。

module.exports = {
  servers: [{
      host: 'localhost',
      port: 27017,
    },
    {
      host: 'localhost',
      port: 27018,
    },
    {
      host: 'localhost',
      port: 27019,
    },
  ],
  database: 'mydatabase',
  options: {
    "raw": false,
    "poolSize": 5,
    "readPreference": "primaryPreferred",
    "w": 1,
    "wtimeout": 12000,
    "replicaSet": "hdbrs"
  }
};

连接到 mongodb 时，我的应用程序抛出以下错误，有人可以帮我吗？

{ MongoNetworkError: failed to connect to server [mongodb_primary:27017] on first connect [MongoNetworkError: getaddrinfo ENOTFOUND mongodb_primary mongodb_primary:27017]
    at Pool.<anonymous> (/Users/hiteshbaldaniya/Applications/contentstack-migration/node_modules/mongodb-core/lib/topologies/server.js:505:11)
    at Pool.emit (events.js:198:13)
    at Connection.<anonymous> (/Users/hiteshbaldaniya/Applications/contentstack-migration/node_modules/mongodb-core/lib/connection/pool.js:329:12)
    at Object.onceWrapper (events.js:286:20)
    at Connection.emit (events.js:198:13)
    at Socket.<anonymous> (/Users/hiteshbaldaniya/Applications/contentstack-migration/node_modules/mongodb-core/lib/connection/connection.js:245:50)
    at Object.onceWrapper (events.js:286:20)
    at Socket.emit (events.js:198:13)
    at emitErrorNT (internal/streams/destroy.js:91:8)
    at emitErrorAndCloseNT (internal/streams/destroy.js:59:3)
  name: 'MongoNetworkError',
  message:
   'failed to connect to server [mongodb_primary:27017] on first connect [MongoNetworkError: getaddrinfo ENOTFOUND mongodb_primary mongodb_primary:27017]' }

谢谢，

标签： node.jsmongodbdocker

解决方案

我能够找出解决方案。通过在我的 /etc/hosts 文件中添加主机条目。

127.0.0.1 mongodb_primary
127.0.0.1 mongodb_secondary1
127.0.0.1 mongodb_secondary2

从主机连接到在 docker 内运行的 mongodb 时，我仍然不确定 localhost 有什么问题，我仍然需要了解它的行为。

仅对于节点，我还尝试在 mongodb 运行命令期间在命令行中添加 --bind_ip_all 。

如果有人知道，请告诉我。谢谢

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