Question

我正在尝试在执行docker-compose之前从sequelize播种数据，但是播种时出现此错误。

错误：连接ECONNREFUSED 127.0.0.1:5432

这是我正在使用的命令

docker-compose run --rm app npm run seed

在执行docker-compose up sequelize时会同步模型，但是我需要在模型同步之前先连接到服务器，以便我可以执行诸如播种数据或运行迁移之类的命令。我该怎么办？

我将分享相关代码。

续集如何连接到数据库

if (process.env.NODE_ENV === "production") {
  var sequelize = new Sequelize(process.env.DATABASE_URL);
} else {
  var sequelize = new Sequelize(
    process.env.POSTGRES_DB,
    process.env.POSTGRES_USER,
    "",
    {
      host: process.env.PSQL_HOST,
      dialect: "postgres",
      pool: {
        max: 100,
        min: 0,
        idle: 200000,
        // @note https://github.com/sequelize/sequelize/issues/8133#issuecomment-359993057
        acquire: 1000000,
      },
    }
  );
}

docker-compose.yml

# docker-compose.yml
version: "3"
services:
  app:
    build: ./server
    depends_on:
      - database
    ports:
      - 5000:5000
    environment:
      PSQL_HOST: database
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-password}
      POSTGRES_USER: ${POSTGRES_USER:-postgres}
      POSTGRES_DB: ${POSTGRES_DB:-elitypescript}
    entrypoint: ["/bin/bash", "./entrypoint.sh"]
  client:
    build: ./client
    image: react_client
    links:
      - app
    working_dir: /home/node/app/client
    volumes:
      - ./:/home/node/app
    ports:
      - 3001:3001
    command: npm run start
    env_file:
      - ./client/.env

  database:
    image: postgres:9.6.8-alpine
    volumes:
      - database:/var/lib/postgresql/data
    ports:
      - 3030:5432

volumes:
  database:

.entrypoint.sh

# entrypoint.sh
npm run seed # my attempt to run seed first before server kicks in. but doesn't work
npm run server

app.ts

models.sequelize.sync().then(() => {
  httpServer.listen(PORT, () => {
    console.log(
      "App is running at http://localhost:%d in %s mode",
      app.get("port"),
      app.get("env")
    );
    console.log("  Press CTRL-C to stop\n");
  });
});

Answer 1

@Neo Anderson，感谢您指出config.json问题，我能够解决此问题。

所以问题是几件事。启动服务器时，Sequelize查找2个文件。

其中一个是config.json，

.sequelizerc

const path = require('path');
module.exports = {
  'config': path.resolve('config', 'config.json'),
  'models-path': path.resolve('models'),
  'seeders-path': path.resolve('dist', 'seeders'),
  'migrations-source-path' : path.resolve('migrations'),
  'migrations-compiled-path': path.resolve('dist', 'migrations')

}

和models/index.js

中的查询

if (process.env.NODE_ENV === "production") {
  var sequelize = new Sequelize(process.env.DATABASE_URL);
} else {
  console.log(
    process.env.POSTGRES_DB,
    process.env.POSTGRES_USER,
    process.env.PSQL_HOST
  );
  var sequelize = new Sequelize(
    process.env.POSTGRES_DB,
    process.env.POSTGRES_USER,
    "",
    {
      host: process.env.PSQL_HOST,
      dialect: "postgres",
      pool: {
        max: 100,
        min: 0,
        idle: 200000,
        // @note https://github.com/sequelize/sequelize/issues/8133#issuecomment-359993057
        acquire: 1000000,
      },
    }
  );
}

您必须做的是确保将docker-compose.yml环境变量传递到这两个文件中。

# docker-compose.yml
version: "3"
services:
  app:
    build: ./server
    depends_on:
      - database
    ports:
      - 5000:5000
    environment:
      # these variables must be passed in config.json, and models/index.js 
      PSQL_HOST: database
      PSQL_PORT: 5430
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-password}
      POSTGRES_USER: ${POSTGRES_USER:-postgres}
      POSTGRES_DB: ${POSTGRES_DB:-elitypescript}
    entrypoint: ["/bin/bash", "./entrypoint.sh"]
    ....

config.json

我知道我应该使用process.env，但是现在我只是在这里对docker变量进行了硬编码。因为我需要将config.json变成一个js文件。

{
  "development": {
    "username": "postgres",
    "password": "",
    "database": "elitypescript",
    "host": "database",
    "dialect": "postgres",
    "port": "5432"
  },

}

因此，现在docker正在执行种子，并从entrypoint.sh运行服务器。现在一切都按预期进行。

希望这对任何人都有帮助

使用sequelize启动postgres服务器时连接ECONNREFUSED

1 个答案: