使用 docker-compose 进行 sequelize 迁移时出现 ECONNREFUSED 错误

Question

I'm trying to up a nodejs application that uses sequelize to manage a MySQL database. To do this, I used sequelize-cli.

When I run docker-compose, it builds the images correctly, but, at the time it starts the containers, the sequelize-cli cannot connect into MySQL database and make the migrations.

Dockerfile

FROM node:10-alpine

RUN mkdir /usr/app
WORKDIR /usr/app

COPY package.json yarn.lock ./
RUN yarn

COPY . ./

EXPOSE 3333

CMD yarn start

docker-compose.yml

version: '3'

services:
  database:
    image: mysql:5.7
    command: --default-authentication-plugin=mysql_native_password
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=123123
      - MYSQL_DATABASE=test

  app:
    build: .
    ports:
      - '3333:3333'
    command: yarn start
    environment:
      - DB_HOST=database
      - DB_USER=root
    depends_on:
      - database

database.js

module.exports = {
  username: process.env.DB_USER || 'test',
  password: process.env.DB_PASSWORD || '123123',
  database: process.env.DB_NAME || 'test',
  host: process.env.DB_HOST || '127.0.0.1',
}

package.json scripts

"scripts": {
    "start": "npx sequelize db:migrate && npx sequelize db:seed:all && node src/app/index.js"
  },

When I run docker-compose up -d --build I expect to see the containers running without problems. The database container created by docker-compose runs correctly, but the app container don't.

Running docker logs <app_container_id> , I have the following output:

yarn run v1.17.3

$ npx sequelize db:migrate && npx sequelize db:seed:all && node src/app/index.js

Sequelize CLI [Node: 10.16.3, CLI: 5.4.0, ORM: 5.8.5]

Loaded configuration file "src/config/database.js".

ERROR: connect ECONNREFUSED 172.27.0.2:3306

error Command failed with exit code 1.

info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Docker-compose injects the database container IP into my app container environment variables, so why am I still get connection refused?

Answer 1

我知道它有点晚了，但是您要做的就是将主机从“172.27.0.2”更改为您的数据库容器名称“数据库”

Answer 2

are you linking your docker containers? or are they part of the same network? you need yo verify the link between your database and your app container. make sure that you are connecting your 2 containers before running migrations.