我将一个应用程序容器化，该应用程序是自动selenium测试的测试驱动程序。Selenium服务器（也称为Selenium
Hub）在localhost：4444下的另一个Container和Firefox Node中运行。但是我的应用程序无法达到它：

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中有一个错误，但我无法弄清楚。请帮忙！顺便说一句：我正在Windows 7上运行，并将Docker与Vagrant
VM配合使用。在我的Vagrantfile中，我将端口4444和9005映射到了主机系统。如果打开本地浏览器并访问localhost：4444，则可以看到selenium网格控制台。为什么从我的应用程序容器中不起作用？