Node.js应用程序docker无法连接到mongodb docker容器 [英] Nodejs application docker unable to connect to mongodb docker container

问题描述

我有一个 nodejs 应用程序，该应用程序进行了泊坞化处理，并需要一个复制的MongoDB数据库.我已经在docker-compose中构建了复制的MongoDB，并且工作正常.如果我运行命令 docker inspect MongoDB-primary | grep IPAddress 其打印内容:

I have a nodejs application which dockerized and need a replicated MongoDB database. I have built my replicated MongoDB in docker-compose and working just fine. if I run the command docker inspect MongoDB-primary |grep IPAddress its print:

"IPAddress": "",
            "IPAddress": "172.18.0.2",

现在在我的应用程序中，我将此IP作为mongoconnection字符串(当然带有协议名称)给定，但是应用程序无法连接到MongoDB并抛出此错误消息(应用程序也是docker容器):

now in my application, i give this ip as mongoconnection string(of course with protocol names) but the application cannot connect to MongoDB and throw this error message(application also is a docker container):

 message: 'failed to connect to server [172.18.0.2:27017] on first connect [MongoNetworkError: connection 1 to 172.18.0.2:27017 timed out]',

这是我的mongodb docker compose文件:

here is my mongodb docker compose file:

version: '2'

services:
  mongodb-primary:
    image: 'bitnami/mongodb:latest'
    environment:
      - MONGODB_REPLICA_SET_MODE=primary
    volumes:
      - 'mongodb_master_data:/bitnami'

  mongodb-secondary:
    image: 'bitnami/mongodb:latest'
    depends_on:
      - mongodb-primary
    environment:
      - MONGODB_REPLICA_SET_MODE=secondary
      - MONGODB_PRIMARY_HOST=mongodb-primary
      - MONGODB_PRIMARY_PORT_NUMBER=27017

  mongodb-arbiter:
    image: 'bitnami/mongodb:latest'
    depends_on:
      - mongodb-primary
    environment:
      - MONGODB_REPLICA_SET_MODE=arbiter
      - MONGODB_PRIMARY_HOST=mongodb-primary
      - MONGODB_PRIMARY_PORT_NUMBER=27017

volumes:
  mongodb_master_data:
    driver: local

我的节点js应用程序dockerfile是:

and my node js application dockerfile is:

FROM node:6.0

# Create app directory
WORKDIR /usr/src/app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./

RUN npm install
# If you are building your code for production
# RUN npm install --only=productio


# Bundle app source
COPY . .

EXPOSE 3001

CMD [ "npm", "start" ]

我该如何解决?

推荐答案

您的 docker-compose 不会自动将tcp端口暴露给外部环境，例如您的主机PC(我假设您的nodeJs 在主机上运行，​​不包含在 docker-compose 中).这是 docker bridge network 的行为，您可以在 https:中阅读更多内容://docs.docker.com/network/bridge/

Your docker-compose does not automatically expose tcp ports to the outer world, like your host PC (I assume your nodeJs runs on host and not included in docker-compose). This is the behavior of docker bridge networks, you can read more at https://docs.docker.com/network/bridge/

您必须执行以下一项操作:

You have to do one of the following:

将您的NodeJs容器包含在 docker-compose

Include your NodeJs container into docker-compose

或

暴露来自 docker-compose.yml

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