Docker Container无法访问localhost端口4444.为什么?

时间:2017-08-09 14:10:22

标签: selenium docker networking vagrant communication

我将应用程序容器化,这是自动化Selenium测试的测试驱动程序。 Selenium服务器(也称为Selenium Hub)运行在另一个Container,以及localhost:4444下的Firefox节点。 但我的应用无法达到它:

Build info: version: 'unknown', revision: 'unknown', time: 'unknown'
System info: host: '10d3b5fd1010', ip: '172.17.0.2', os.name: 'Linux', os.arch: 'amd64', os.version: '3.16.0-4-amd64', java.version: '1.8.0_11            1'
Driver info: driver.version: RemoteWebDriver
        at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:665)
        at org.openqa.selenium.remote.RemoteWebDriver.startSession(RemoteWebDriver.java:249)
        at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:131)
        at org.openqa.selenium.remote.RemoteWebDriver.<init>(RemoteWebDriver.java:158)
        at de.services.impl.TestSetupFactory.getWebDriver(TestSetupFactory.java:408)
        at de.services.impl.TestSetupFactory.getSeleniumService(TestSetupFactory.java:279)
        at de.services.impl.AutomationServiceImpl.executeTests(AutomationServiceImpl.java:220)
        at de.start.Start.main(Start.java:25)
Caused by: org.apache.http.conn.HttpHostConnectException: Connect to localhost:4444 [localhost/127.0.0.1, localhost/0:0:0:0:0:0:0:1] failed: C            onnection refused (Connection refused)
        at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:158)
        at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)

我通过docker-compose:

启动了这些容器

version: '2'
services:
  hub:
    image: selgrid:1.1
    ports:
      - "4444:4444"

  firefox:
    #pull latest from docker hub
    image: selenium/node-firefox
    volumes:
      - /dev/urandom:/dev/random
    depends_on:
      - hub
    environment:
      - HUB_PORT_4444_TCP_ADDR=hub
      - HUB_PORT_4444_TCP_PORT=4444
  testautomation:
    #run testautomation app
    image: volumetest
    links:
      - "hub"
    ports:
      - "9005:9005"

我想我的docker-compose有一个错误,但我无法弄明白。请帮忙! 顺便说一句:我在Windows 7上运行并使用Docker和Vagrant VM。在我的Vagrantfile中,我将端口4444和9005映射到主机系统。如果我打开本地浏览器并访问localhost:4444,我可以看到selenium网格控制台。为什么它不适用于我的应用容器?

2 个答案:

答案 0 :(得分:2)

在您的应用容器localhost中表示当前容器。因此,您需要使用服务的名称。在您的情况下,hub

所以连接到hub:4444

答案 1 :(得分:0)

移植到docker-compose版本2后,我遇到了同样的问题。 这是我得到的日志

Connect to localhost:4444 [localhost/127.0.0.1] failed: Connection refused

org.openqa.selenium.remote.UnreachableBrowserException: Could not start a new session. Possible causes are invalid address of the remote server or browser start-up failure.

以下是docker-compose yml文件的样子:

version: '2'
services:
  seleniumhub:
    image: selenium/hub
    ports:
      - 4444:4444
  firefoxnode:
    image: selenium/node-firefox-debug
    ports:
      - 5900
    environment:
        - HUB_PORT_4444_TCP_ADDR=seleniumhub
        - HUB_PORT_4444_TCP_PORT=4444
  webdrivertests:
    image: vodqa/gridtests
    volumes:
      - ./temp:/usr/src/app/target
    environment:
        - HUB_PORT_4444_TCP_ADDR=seleniumhub
        - HUB_PORT_4444_TCP_PORT=4444
    command: bash -c "cd /usr/src/app && mvn test"    

在我的测试中,我尝试使用以下方式访问集线器:

new RemoteWebDriver(new URL("http://localhost:4444/wd/hub"),desiredCapabilitiesff   );