无法从 docker 容器中的 nodejs 服务器连接到 postgres、redis：获取连接 ECONNREFUSED

Question

-- Docker FIle

FROM node:4.4.2
EXPOSE 3000
ENV NODE_ENV test
WORKDIR /app
COPY ["package.json", "npm-shrinkwrap.json*", "./"]
RUN npm install --silent
COPY . /app
CMD node server.js

-- DOCKER-COMPOSE

version: "2"
services:
postgresql:
    image: postgres:9.5.21
    container_name: postgresql
    volumes:
        - '$HOME/DOCKER_VOLUME/db-data1:$HOME/DOCKER_VOLUME/var/lib/postgres'
    environment:
        POSTGRES_PASSWORD: <PWD>
        POSTGRES_DB: <DB>
        POSTGRES_USER: <UERS>
    ports:
        - '5432:5432'
redis:
    image: redis
    container_name: redis
    ports:
        - '6379:6379'
broker:
    image: eclipse-mosquitto
    container_name: mosquitto
    volumes:
        - $HOME/DOCKER_VOLUME/etc/mosquitto:$HOME/DOCKER_VOLUME/etc/mosquitto:ro
        - $HOME/DOCKER_VOLUME/var/log/mosquitto:$HOME/DOCKER_VOLUME/var/log/mosquitto:rw
    ports:
        - '1883:1883'
app:
    container_name: ms_user_manager
    environment:
        NODE_ENV: test
    build: .
    volumes:
        - .:/app
        - /app/node_modules
    depends_on:
        - postgresql
        - redis
        - broker
    ports:
        - '3000:3000'

I am able to access postgres, redis outside of container but nodejs app unable to connect to both & giving error

Redis - connection to 0.0.0.0:6379 failed - connect ECONNREFUSED 0.0.0.0:6379"

Postgres - Error: connect ECONNREFUSED 0.0.0.0:5432

So any idea, what I am doing wrong or what i missed.

Answer 1

Your Node.js app should try to connect to redis:6379 . Change this in your application configuration. At the moment it looks like it is trying to connect to localhost (which works probably when you run your server locally on the host).