Question

我有一个Node.js应用程序并设置了docker-compose。我试图在容器中使用Postgres DB。

这是docker-compose

version: "3"
services:
  web:
    build: .
    ports:
      - "3000:3000"
    links:
      - redis
      - db
  angular: # image of nginx
    image: "qp-angular-nginx"
    ports:
      - "4200:80" # specify port forewarding

  redis:
    image: "redis:3"
    ports:
     - "6379:6379"     
  db:
    image: "postgres:9.6"
    ports:
     - "5432:5432"
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
    volumes:
         - pgdata:/var/lib/postgresql/data         
  dbadmin:
    image: "myimage/phppgadmin"
    ports:
         - "8085:80"
    environment:
        POSTGRES_HOST: db
        POSTGRES_PORT: 5432
volumes: 
     pgdata:

我已成功运行容器，甚至连接了数据库，但在发出数据库请求时出现此错误

 "stack": {
        "code": "ECONNREFUSED",
        "errno": "ECONNREFUSED",
        "syscall": "connect",
        "address": "127.0.0.1",
        "port": 5432
    }

Answer 1

如果从另一个docker容器连接到数据库，请在连接字符串中使用服务名称（在您的情况下为db）。从错误消息看，您的配置似乎有问题。它尝试连接到localhost（127.0.0.1）

Answer 2

对于那些，您可以使用带有以下配置文件的最新结构项目：

require('dotenv').config();

module.exports = {
    development: {
        username: process.env.DB_USER,
        password: process.env.DB_PASSWORD,
        database: process.env.DB_NAME,
        host: process.env.APP_URL_DOCKER,
        dialect: 'postgres'
    },
    test: {
        username: process.env.DB_USER,
        password: process.env.DB_PASSWORD,
        database: process.env.DB_NAME,
        host: process.env.APP_URL_DOCKER,
        dialect: 'postgres'
    },
    production: {
        username: process.env.DB_USER,
        password: process.env.DB_PASSWORD,
        database: process.env.DB_NAME,
        host: process.env.APP_URL_DOCKER,
        dialect: 'postgres'
    }
};

您可以在postgres database文件中指定.env的服务名称。而且对您来说应该是有益的。

// .env file
APP_URL_LOCAL=127.0.0.1
APP_URL_DOCKER=db # database service name
APP_PORT=8000
APP_KEY=6dd63668dab9a309c7c59a2982126a43b064816925a40b9680d16e2665f41b676a87dae4d506712e6332479c82827993059ddefb607b65caa3534b66b20253ed

DB_USER=postgres
DB_PASSWORD=db_password
DB_NAME=db_name
DB_PORT_CONTAINER=5432
DB_PORT_LOCAL=5433

无法在docker-compose中使用Postgres DB - ECONNREFUSED

2 个答案: