如何在Docker中用铬运行硒

Question

automation@1c17781fef0c:/topology-editor/test$ python test.py
Traceback (most recent call last):
  File "test.py", line 27, in <module>
    browser = webdriver.Chrome()
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/chrome/webdriver.py", line 69, in __init__
    desired_capabilities=desired_capabilities)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 98, in __init__
    self.start_session(desired_capabilities, browser_profile)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 185, in start_session
    response = self.execute(Command.NEW_SESSION, parameters)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/webdriver.py", line 249, in execute
    self.error_handler.check_response(response)
  File "/usr/local/lib/python2.7/dist-packages/selenium/webdriver/remote/errorhandler.py", line 194, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: Chrome failed to start: crashed
  (Driver info: chromedriver=2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8),platform=Linux 4.4.0-83-generic x86_64)

如果我直接在docker中运行google-chrome，它会显示如下：

automation@1c17781fef0c:/topology-editor/test$ google-chrome
Failed to move to new namespace: PID namespaces supported, Network namespace supported, but failed: errno = Operation not permitted
Trace/breakpoint trap (core dumped)
automation@1c17781fef0c:/topology-editor/test$

系统：

$ uname -a
Linux 1c17781fef0c 4.4.0-83-generic #106-Ubuntu SMP Mon Jun 26 17:54:43 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
$ google-chrome --version
Google Chrome 60.0.3112.78
$ chromedriver --version
ChromeDriver 2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8)

Answer 1

您需要启动一个独立的chrome浏览器

docker run -d -p 4444:4444 selenium/standalone-chrome

然后在您的python脚本中使用远程webdriver启动浏览器

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
driver = webdriver.Remote("http://127.0.0.1:4444/wd/hub", DesiredCapabilities.CHROME)

如果需要，还可以启动一个Selenium网格集线器。

# docker-compse.yml

selenium:
  image: selenium/standalone-firefox
  ports:
  - 4444:4444

# project/app/test.py

from django.test import TestCase
from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities


class SiteTest(TestCase):
    fixtures = [
        'app/fixtures/app.json',
        ...
    ]

    def setUp(self):
        self.browser = webdriver.Remote("http://selenium:4444/wd/hub", DesiredCapabilities.FIREFOX)

    def tearDown(self):
        self.browser.quit()

    def test_visit_site(self):
        self.browser.get('http://app:8000/')
        self.assertIn(self.browser.title, 'Home')

from selenium import webdriver
options = webdriver.ChromeOptions()
options.add_argument('--headless')  # example
driver = webdriver.Remote("http://127.0.0.1:4444/wd/hub", options=options)