带有 Docker 的 MongoDB“在第一次连接时无法连接到服务器 [localhost:27017]"

问题描述

我正在使用 mongoDB 和 NodeJS 后端.问题是我收到以下错误

I am using mongoDB with and NodeJS backend. The Problem is I am getting the following error

node:16) UnhandledPromiseRejectionWarning: MongoNetworkError: failed在第一次连接时连接到服务器 [localhost:27017][MongoNetworkError:连接ECONNREFUSED 127.0.0.1:27017]

这是我的 docker-compose

This is my docker-compose

version: '3.4'

services:
  db:
    image: mongo:latest
    ports:
      - '27017:27017'

  rest-api-node:
    build: .
    ports:
      - '5000:5000'
    links:
      - db
    restart: on-failure

我也尝试过 depends_on ，但没有用.

I have tried with depends_on as well , was not working.

在后端，我使用猫鼬作为与数据库通信的中间件.这是我的 index.js

On backend I am mongoose as a middleware to communicate with DB. this is the part of my index.js

mongoose.Promise = global.Promise
mongoose.connect('mongodb://localhost/demo')
app.listen(port, () => console.log("live"))

我也尝试过使用 promise ，但没​​有改变.请帮帮我.提前致谢

I have tried using promise as well , no change though. Please Help me out.Thanks in advance

完整的错误日志

在游泳池.(/app/node_modules/mongodb-core/lib/topologies/server.js:505:11)rest-api-node_1 |在 Pool.emit (events.js:180:13) rest-api-node_1|在连接.(/app/node_modules/mongodb-core/lib/connection/pool.js:329:12)rest-api-node_1 |在 Object.onceWrapper (events.js:272:13)rest-api-node_1 |在 Connection.emit (events.js:180:13)rest-api-node_1 |在套接字.(/app/node_modules/mongodb-core/lib/connection/connection.js:245:50)rest-api-node_1 |在 Object.onceWrapper (events.js:272:13)rest-api-node_1 |在 Socket.emit (events.js:180:13)rest-api-node_1 |在发射错误NT(internal/streams/destroy.js:64:8) rest-api-node_1 |在process._tickCallback (internal/process/next_tick.js:178:19)rest-api-node_1 |名称:'MongoNetworkError'，rest-api-node_1 |
消息:'第一次连接到服务器 [localhost:27017] 失败连接 [MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017]' }

推荐答案

根据您的 docker-compose.yaml 文件，您只能从主机访问 127.0.0.1:27017 上的 mongo 容器.为了从 NodeJS 后端容器访问它，您应该使用 db:27017.

According to your docker-compose.yaml file you can access you mongo container on 127.0.0.1:27017 only from host machine. In order to access it from NodeJS backend container you should use db:27017.

这篇关于带有 Docker 的 MongoDB“在第一次连接时无法连接到服务器 [localhost:27017]"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！