首页 > 解决方案 > 如何在 linux 服务器上使用 docker-compose 安装 phantomjs 和 selenium?

问题描述

我正在为我的网络爬虫使用 selenium 和 phantomjs。一切都适用于我的测试窗口应用程序。尝试将此代码更新添加到使用 docker-compose 部署的我的主应用程序中,我得到了这个: selenium.common.exceptions.WebDriverException: Message: 'phantomjs' executable needs to be in PATH.

我应该如何解决这个问题?目前我的 docker-compose.yml 有这个代码:

version: '3.1'

services:

  tgbot:
    container_name: bot
    build:
      context: .
    command: python app.py
    restart: always
    environment:
      WEBAPP_PORT: 3001
    env_file:
      - ".env"
    # bot start after load db
    ports:
      - 8443:3001
    networks:
      - botnet

  phantomjs:
    image: shufo/phantomjs
    command: --webdriver 8901

networks:
      botnet:
        driver: bridge

还有我的python代码:

from selenium import webdriver
driver = webdriver.PhantomJS()

码头文件:

FROM python:latest

RUN mkdir /src
WORKDIR /src
COPY requirements.txt /src
RUN pip install -r requirements.txt
COPY . /src

PS我正在使用phantomjs,因为我正在抓取的网页有JS。不适用于铬

标签: pythondockerseleniumdocker-composephantomjs

解决方案


您的配置有几个问题:

  1. 您的机器人代码在不同的容器中工作。不在那个启动 phantomjs 的那个。这就是它找不到可执行文件的原因。
  2. 您运行的 phantomjs 容器与您的代码不在同一个网络中
  3. 有些无用的配置似乎是从其他示例中复制粘贴的。
  4. 您强制容器重新启动。即使成功退出代码,它也会重新启动。

因此,这是如何运行所有内容的完整示例:

  1. 创建空文件夹myfolder并放在那里app.py,内容如下:
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
driver = webdriver.Remote(command_executor='http://phantomjs:8901/wd/hub/',desired_capabilities=DesiredCapabilities.PHANTOMJS)
  1. 将 requirements.txt 文件放到myfolder
  2. 将以下内容Dockerfile放入myfolder
FROM python:latest

WORKDIR /configs
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt
  1. 将以下内容docker-compose.yml放入myfolder
version: '3.1'

services:

  tgbot:
    build: .
    container_name: bot
    volumes:
      - .:/apps
    command: python /apps/app.py
    depends_on:
      - phantomjs
    networks:
      - botnet

  phantomjs:
    container_name: phantomjs
    image: shufo/phantomjs
    command: --webdriver 8901
    networks:
      - botnet

networks:
  botnet:
    driver: bridge
  1. cd myfloder,docker-compose up

输出:

phantomjs    | [INFO  - 2020-11-10T15:18:11.049Z] GhostDriver - Main - running on port 8901
phantomjs    | [INFO  - 2020-11-10T15:18:11.425Z] Session [f2091fe0-2367-11eb-bcd7-956b9cd40e54] - page.settings - {"XSSAuditingEnabled":false,"javascriptCanCloseWindows":true,"javascriptCanOpenWindows":true,"javascriptEnabled":true,"loadImages":true,"localToRemoteUrlAccessEnabled":false,"userAgent":"Mozilla/5.0 (Unknown; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) PhantomJS/2.1.1 Safari/538.1","webSecurityEnabled":true}
phantomjs    | [INFO  - 2020-11-10T15:18:11.425Z] Session [f2091fe0-2367-11eb-bcd7-956b9cd40e54] - page.customHeaders:  - {}
phantomjs    | [INFO  - 2020-11-10T15:18:11.425Z] Session [f2091fe0-2367-11eb-bcd7-956b9cd40e54] - Session.negotiatedCapabilities - {"browserName":"phantomjs","version":"2.1.1","driverName":"ghostdriver","driverVersion":"1.2.0","platform":"linux-unknown-64bit","javascriptEnabled":true,"takesScreenshot":true,"handlesAlerts":false,"databaseEnabled":false,"locationContextEnabled":false,"applicationCacheEnabled":false,"browserConnectionEnabled":false,"cssSelectorsEnabled":true,"webStorageEnabled":false,"rotatable":false,"acceptSslCerts":false,"nativeEvents":true,"proxy":{"proxyType":"direct"}}
phantomjs    | [INFO  - 2020-11-10T15:18:11.425Z] SessionManagerReqHand - _postNewSessionCommand - New Session Created: f2091fe0-2367-11eb-bcd7-956b9cd40e54
bot exited with code 0

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