Sequelize 无法从 Node/express 应用程序 (ECONNREFUSED) 同步到 docker 容器中的 MySQL

Question

我第一次同时使用 sequelize、MySQL 和 docker，但无法通过 sequelize 连接到数据库。

我已经用 DBeaver 测试了数据库的存在，我可以连接。当我通过 DBeaver 连接时，我还可以在终端中看到 MySQL 容器的响应。但是，当尝试使用代码连接时，出现 ECONNREFUSED 错误。

我已经使用 sequelize 文档检查了我的代码并仔细检查了端口设置，但似乎看不出我哪里出错了。

在下面提供正确答案后，我注意到我有一个错误。我错过了 docker-compose.yml 文件中“mysql”容器中的以下内容。

networks:
    - app-tier

为了避免要求其他用户阅读答案中的评论以发现这一点，我已将其添加到 docker-compose.yml 文件中，以便问题和答案现在更清晰地对齐

docker-compose.yml 文件：

version: '3'

networks:
    app-tier:
        driver: bridge
services:
    server:
        image: bitnami/node
        networks:
        - app-tier
        command: "sh -c 'npm install && npm run dev'"
        volumes:
        - ./server:/app
        ports:
        - 5000:5000
        depends_on:
        - mysql
    mysql:
        image: 'bitnami/mysql:latest'
        environment:
        - MYSQL_USER=root
        - MYSQL_PASSWORD=password
        - MYSQL_ROOT_PASSWORD=password
        - MYSQL_DATABASE=school
        networks:
            - app-tier
        ports:
        - '3306:3306'
        volumes:
        - ./db:/bitnami/mysql/data

续集连接：

const Sequelize = require('sequelize');

const sequelize = new Sequelize('school', 'root', 'password', {
dialect: 'mysql'
});

module.exports = sequelize;

尝试从 app.js 同步：

sequelize.sync()
    .then(result => console.log(result))
    .catch(err => console.log('EEEERRRROOOOOOR',err));

终端输出：

server_1    |  { SequelizeConnectionRefusedError: connect ECONNREFUSED 127.0.0.1:3306
server_1    |     at Utils.Promise.tap.then.catch.err (/app/node_modules/sequelize/lib/dialects/mysql/connection-manager.js:139:19)
server_1    |     at tryCatcher (/app/node_modules/bluebird/js/release/util.js:16:23)
server_1    |     at Promise._settlePromiseFromHandler (/app/node_modules/bluebird/js/release/promise.js:512:31)
server_1    |     at Promise._settlePromise (/app/node_modules/bluebird/js/release/promise.js:569:18)
server_1    |     at Promise._settlePromise0 (/app/node_modules/bluebird/js/release/promise.js:614:10)
server_1    |     at Promise._settlePromises (/app/node_modules/bluebird/js/release/promise.js:689:18)
server_1    |     at Async._drainQueue (/app/node_modules/bluebird/js/release/async.js:133:16)
server_1    |     at Async._drainQueues (/app/node_modules/bluebird/js/release/async.js:143:10)
server_1    |     at Immediate.Async.drainQueues (/app/node_modules/bluebird/js/release/async.js:17:14)
server_1    |     at runCallback (timers.js:810:20)
server_1    |     at tryOnImmediate (timers.js:768:5)
server_1    |     at processImmediate [as _immediateCallback] (timers.js:745:5)
server_1    |   name: 'SequelizeConnectionRefusedError',
server_1    |   parent:
server_1    |    { Error: connect ECONNREFUSED 127.0.0.1:3306
server_1    |     at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1191:14)
server_1    |      errno: 'ECONNREFUSED',
server_1    |      code: 'ECONNREFUSED',
server_1    |      syscall: 'connect',
server_1    |      address: '127.0.0.1',
server_1    |      port: 3306,
server_1    |      fatal: true },
server_1    |   original:
server_1    |    { Error: connect ECONNREFUSED 127.0.0.1:3306
server_1    |     at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1191:14)
server_1    |      errno: 'ECONNREFUSED',
server_1    |      code: 'ECONNREFUSED',
server_1    |      syscall: 'connect',
server_1    |      address: '127.0.0.1',
server_1    |      port: 3306,
server_1    |      fatal: true } }

Answer 1

要从 docker 容器连接到您的 mysql 服务器，您需要传递正确的服务地址。所以你的初始化应该是这样的。

const Sequelize = require('sequelize');

const sequelize = new Sequelize('school', 'root', 'password', {
host: 'mysql',
dialect: 'mysql'
});

module.exports = sequelize;