Docker Selenium 服务器提前终止，状态为 255

Question

我正在尝试创建一个容器化的 Express 应用程序，该应用程序启动 selenium webdriver 实例并进行一些抓取。

以下应用程序在本地完美运行，但是当我尝试将其容器化时，Express 服务器按预期启动，但在向

/

发出请求后，它挂起约 30 秒然后崩溃。

有人能指出我正确的方向吗？

我的配置：

app.js

import 'chromedriver';

import express from 'express';
import webdriver from 'selenium-webdriver';

const app = express()
const port = 8080

app.get('/', async (req, res) => {
    console.log('Starting the browser')
    const chromeCapabilities = webdriver.Capabilities.chrome();
    //setting chrome options to start the browser fully maximized
    const chromeOptions = {
        'args': ['--test-type', '--start-maximized', '--headless=new', '--disable-gpu']
    };
    chromeCapabilities.set('chromeOptions', chromeOptions);
    const driver = new webdriver.Builder()
        .forBrowser('chrome')
        .withCapabilities(chromeCapabilities)
        .build();

    // console.log('Driver started, going to the website')
    await driver.get('https://google.com');


    driver.quit();

    res.send('Hello World!')
})

// healthcheck
app.get('/health', (req, res) => {
    res.send('OK')
});


app.listen(port, () => {
    console.log(`Example app listening on port ${port}`)
})

docker文件

FROM node:18

# Install Chrome
RUN wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
RUN dpkg -i google-chrome-stable_current_amd64.deb; apt-get -fy install


WORKDIR /usr/src/app
COPY package*.json ./

# Install production dependencies.
RUN npm install --only=production
RUN npm install chromedriver --chromedriver-force-download

# Copy local code to the container image.
COPY . ./

# Run the web service on container startup.
CMD [ "npm", "start" ]

package.json

  "dependencies": {
    "express": "^4.18.2",
    "selenium-webdriver": "^4.18.1",
    "supabase": "^1.145.4"
  }

日志

docker run --rm -p 8080:8080 -e PORT=8080 hw

> [email protected] start
> node app.js

Example app listening on port 8080
Starting the browser
/usr/src/app/node_modules/selenium-webdriver/remote/index.js:256
              let cancelToken = earlyTermination.catch((e) => reject(Error(e.message)))
                                                                     ^

Error: Server terminated early with status 255
    at /usr/src/app/node_modules/selenium-webdriver/remote/index.js:256:70
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

Node.js v18.19.1
make: *** [build] Error 1
(.venv) -------------------------------------------------------------------------------------------------------------------------------------------------

Answer 1

关键是要在映像上安装兼容版本的 Chrome 和 ChromeDriver。

🗎

Dockerfile

FROM node:18

RUN apt-get update -qq -y && \
    apt-get install -y \
        libasound2 \
        libatk-bridge2.0-0 \
        libgtk-4-1 \
        libnss3 \
        xdg-utils \
        wget && \
    wget -q -O chrome-linux64.zip https://edgedl.me.gvt1.com/edgedl/chrome/chrome-for-testing/121.0.6167.85/linux64/chrome-linux64.zip && \
    unzip chrome-linux64.zip && \
    rm chrome-linux64.zip && \
    mv chrome-linux64 /opt/chrome/ && \
    ln -s /opt/chrome/chrome /usr/local/bin/ && \
    wget -q -O chromedriver-linux64.zip https://edgedl.me.gvt1.com/edgedl/chrome/chrome-for-testing/121.0.6167.85/linux64/chromedriver-linux64.zip && \
    unzip -j chromedriver-linux64.zip chromedriver-linux64/chromedriver && \
    rm chromedriver-linux64.zip && \
    mv chromedriver /usr/local/bin/

WORKDIR /usr/src/app
COPY package*.json .

ENV CHROMEDRIVER_SKIP_DOWNLOAD=true

RUN npm install --omit=dev
RUN npm install chromedriver

COPY . .

CMD [ "npm", "start" ]

🗎

app.js

（我更新了

/

端点，以便它返回通过 Chrome 下载的内容，而不是字符串

'Hello World!'

。这似乎是一个更好的演示，表明一切正常！）。

import { Builder } from 'selenium-webdriver';
import chrome from 'selenium-webdriver/chrome.js';

import express from "express";

const app = express()
const port = 8080

app.get("/", async (req, res) => {
    console.log("Start the browser.")

    let chromeOptions = new chrome.Options();
    chromeOptions.addArguments('--headless', '--disable-gpu', '--no-sandbox');

    let driver = new Builder()
        .forBrowser('chrome')
        .setChromeOptions(chromeOptions)
        .build();

    console.log("Done!")

    console.log("Open Google.")
    await driver.get("https://google.com");
    console.log("Done!")

    const html = await driver.getPageSource();

    driver.quit();

    res.send(html)
})

app.get("/health", (req, res) => {
    res.send("OK")
});

app.listen(port, () => {
    console.log(`Example app listening on port ${port}.`)
})

🗎

package.json

{
  "name": "selenium-scraper",
  "type": "module",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node app.js"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.18.2",
    "selenium-webdriver": "^4.18.1",
    "supabase": "^1.145.4"
  }
}

构建并运行。

docker build -t express-chrome . && docker run -it -p 8080:8080 express-chrome