Heroku 节点.js和 uWeb.js R10 错误，无法绑定端口

Question

我创建了一个最小的应用程序，用于测试在heroku上使用dockerfile部署node.jsuWebsockets.js服务器。Heroku日志显示它因R10（引导超时）错误而失败，未能绑定到$PORT，尽管之前的日志显示它正在该端口进行侦听。

server.js

const uWS = require('uWebSockets.js');
const port = process.env.PORT || 9001;
const host = '0.0.0.0'

const app = uWS.App()
    .ws('/*', {
        maxPayloadLength: 16 * 1024 * 1024,
        idleTimeout: 160,
    })
    .listen(port, host, (token) => {
        if (token) {
            console.log('Listening to port ' + port);
        } else {
            console.log('Failed to listen to port ' + port);
        }
    });

构建

# syntax=docker/dockerfile:1

FROM node:17.0.1
ENV NODE_ENV=production
WORKDIR /app
COPY ["package.json", "package-lock.json*", "./"]
RUN npm install --production
COPY . .
EXPOSE $PORT
CMD [ "npm", "start" ]

Heroku日志

2021-12-02T15:34:50.509492+00:00 app[web.1]: > dummyserver@1.0.0 start
2021-12-02T15:34:50.509492+00:00 app[web.1]: > node server.js
2021-12-02T15:34:50.509492+00:00 app[web.1]: 
2021-12-02T15:34:50.586940+00:00 app[web.1]: Listening to port 39686
2021-12-02T15:35:49.393274+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2021-12-02T15:35:49.424793+00:00 heroku[web.1]: Stopping process with SIGKILL
2021-12-02T15:35:49.596430+00:00 heroku[web.1]: Process exited with status 0

我尝试过的事情：

1. 使用process.env.PORT
2. 使用主机作为0.0.0.0
3. 直接推送到heroku而不是dockerfile

Answer 1

我做了一些改动，但我认为这是docker的问题，把我的docker文件改成下面的代码片段就可以了。

# syntax=docker/dockerfile:1

FROM node:17.0.1
WORKDIR /app
COPY "package.json" .
RUN npm install
COPY . .
EXPOSE $PORT
CMD [ "npm", "start" ]

还要确保在前端使用wss://app-name.herokuapp.com而不是ws：//来连接。