如何将docker容器端口暴露给另一个容器

时间：2017-06-08 00:42:38

标签： node.js selenium docker docker-compose nightwatch.js

我有一个docker容器，它依赖selenium作为链接服务（也是一个docker容器）。这个docker容器只使用selenium服务作为主机无头地运行nightwatchJS测试。 selenium服务启动正常但是当nightwatch测试尝试在docker容器内运行时，我在selenium服务端口上收到拒绝连接错误（4444）。我可以使用curl访问此端口的selenium主机，如果我不通过docker运行测试，也可以在其上运行nightwatch测试。这是我的docker撰写yaml文件：

services:
  selenium:
    image: selenium/standalone-chrome
    ports:
      - "4444:4444"
  nightwatch:
    build: .
    volumes:
      - .:/home/client_test
    links:
      - selenium
    environment:
      selenium: 4444
    expose:
      - "4444"

和我的泊坞文件：

#
#Nightwatch.js Dockerfile
#

FROM alpine:3.4



WORKDIR /home/client-tests
ADD . /home/client-tests/
ENV NODE_PATH=/home/client-app/node_modules
#RUN apk add 'firefox-esr<45.6.0-r0'

#install firefox

#RUN wget -c http://ftp.mozilla.org/pub/firefox/releases/45.8.0esr/firefox-45.8.0esr.linux-x86_64.sdk.tar.bz2 -P /usr/local
#RUN tar xvjf /usr/local/firefox-45.8.0esr.linux-x86_64.sdk.tar.bz2
#RUN ln -s /usr/local/firefox/firefox /usr/local/bin/




RUN apk --no-cache --update add  bash \
    # Install tini, a tiny but valid init for containers
    tini \
    # Install nodejs
    nodejs-lts \
    #Install java
    openjdk8-jre-base \
    #Install chrome
    chromium \
    chromium-chromedriver \
    #Install firefox
    #firefox \
    unzip \
    wget \
    xvfb \

    dbus \
    tar \
    # Install other dependencies
    && npm install -g nightwatch  \
#   -g request \
#   chai \
#   superagent \
    # Clean up obsolete files:
    && rm -rf \
        /tmp/* \
        /root/.npm

#RUN apk update -q && apk add --no-cache xvfb firefox-esr dbus
#ADD https://gist.github.com/elbaschid/5a91271c07bb0de7bfa6/raw/d07b4eecf02fd3341ef72753e4c5875cf137bda8/xvfb-run.sh /usr/bin/xvfb-run
#RUN chmod u+x /usr/bin/xvfb-run
#
RUN npm install request
RUN npm install chai
RUN npm install superagent
EXPOSE 4444
#
##Fetch the chrome drive for linux
#RUN rm -rf /home/client-app/bin/chromedriver
#RUN rm -rf /home/client-app/bin/geckodriver
#
#RUN wget -c http://chromedriver.storage.googleapis.com/2.28/chromedriver_linux64.zip -P /tmp
#RUN unzip /tmp/chromedriver_linux64.zip -d /tmp
#RUN chmod +x /tmp/chromedriver
#RUN mv -f /tmp/chromedriver /home/client-app/bin/chromedriver
#
##get the gecko driver for linux
#RUN wget https://github.com/mozilla/geckodriver/releases/download/v0.16.1/geckodriver-v0.16.1-linux64.tar.gz -P /tmp
#RUN tar xvzf /tmp/geckodriver-v0.16.1-linux64.tar.gz -C /tmp
#RUN chmod 755 /tmp/geckodriver
#RUN mv -f /tmp/geckodriver /home/client-app/bin/geckodriver

#CMD xvfb-run -e java -Dwebdriver.chrome.driver=./bin/chromedriver -jar ./bin/selenium-server-standalone-3.4.0.jar &; nightwatch -e chrome -t tests/*'
CMD nightwatch -e chrome -t tests/loginTest.js

这是我的nightwatchJS json文件，用于指定主机（为隐私而更改网址）

{
  "src_folders" : ["./tests"],
  "output_folder" : "./reports",
  "custom_commands_path" : "./custom-commands",
  "page_objects_path" : "",
  "custom_assertions_path" : "",
  "globals_path" : "./globals.js",
  "live_output" : false,
  "parallel_process_delay" : 10,
  "disable_colors": false,
  "test_workers" : true,

  "selenium" : {
    "start_process" : false,
    "server_path" : "./bin/selenium-server-standalone-3.4.0.jar",
    "log_path" : "",
    "host" : "127.0.0.1",
    "port" : 4444,
    "cli_args" : {
      "webdriver.gecko.driver" : "./bin/geckodriver",
      "webdriver.chrome.driver" : "./bin/chromedriver",
      "webdriver.ie.driver" : "./bin/IEDriverServer.exe"
    }
  },

  "test_settings" : {
    "default" : {
      "launch_url" : "https://google.com",
      "selenium_host" : "hub",
      "selenium_port" : 4444,
      "silent" : true,
      "disable_colors": false,
      "screenshots" : {
        "enabled" : true,
        "path" : "./screenshots"
      },
      "desiredCapabilities" : {
        "browserName" : "firefox",
        "javascriptEnabled" : true,
        "acceptSslCerts" : true,
        "acceptInsecureCerts" : true,
        "applicationCacheEnabled" : true
      }
    },

    "chrome" : {
      "launch_url" : "https://google.com/",
      "selenium_host" : "0.0.0.0",
      "selenium_post" : 4444,
      "disable_colors" : false,
      "screenshots" : {
        "enabled" : false,
        "path" : ""
      },
      "desiredCapabilities" : {
        "browserName" : "chrome",
        "javascriptEnabled" : true,
        "acceptSslCerts" : true,
        "acceptInsecureCerts" : true,
        "chromeOptions": {
          "args": [ "--no-sandbox"]
        }
      }
    },


    "IE" : {
      "launch_url" : "https://google.com/",
      "selenium_host" : "fakeURLFORSTACK.com",
      "selenium_post" : 4444,
      "disable_colors" : false,
      "screenshots" : {
        "enabled" : false,
        "path" : ""
      },
      "desiredCapabilities" : {
        "browserName" : "internet explorer",
        "javascriptEnabled" : true,
        "acceptSslCerts" : true,
        "acceptInsecureCerts" : true
      }
    },


    "saucelabs" : {
      "selenium_host" : "ondemand.saucelabs.com",
      "selenium_port" : 80,
      "username" : "${SAUCE_USERNAME}",
      "access_key" : "${SAUCE_ACCESS_KEY}",
      "use_ssl" : false,
      "silent" : true,
      "output" : true,
      "screenshots" : {
        "enabled" : false,
        "on_failure" : true,
        "path" : ""
      },
      "desiredCapabilities": {
        "name" : "test-example",
        "browserName": "firefox"
      },
      "globals" : {
        "myGlobal" : "some_sauce_global"
      },
      "selenium" : {
        "start_process" : false
      }
    },

    "phantomjs" : {
      "desiredCapabilities" : {
        "browserName" : "phantomjs",
        "javascriptEnabled" : true,
        "acceptSslCerts" : true,
        "acceptInsecureCerts" : true,
        "phantomjs.binary.path" : "phantomjs"
      }
    },

    "browserstack" : {
      "selenium" : {
        "start_process" : false
      },
      "selenium_host" : "hub.browserstack.com",
      "selenium_port" : 80,
      "silent" : true,
      "desiredCapabilities": {
        "name" : "test-example",
        "browserName": "firefox",
        "browserstack.user" : "...",
        "browserstack.key" : "..."
      }
    },

    "testingbot" : {
      "selenium_host" : "hub.testingbot.com",
      "selenium_port" : 80,
      "apiKey" : "${TB_KEY}",
      "apiSecret" : "${TB_SECRET}",
      "silent" : true,
      "output" : true,
      "screenshots" : {
        "enabled" : false,
        "on_failure" : true,
        "path" : ""
      },
      "desiredCapabilities": {
        "name" : "test-example",
        "browserName": "firefox"
      },
      "selenium" : {
        "start_process" : false
      }
    }
  }
}

如何让我在一个泊坞容器中运行的夜班测试能够利用在4444端口运行的另一个selenium主机？

1 个答案:

答案 0 :(得分：2)

每个容器都有自己的网络。每个接口都有eth0和lo（localhost）接口，它们位于docker的网络中。

因此，您的selenium不在Nighwatch应用程序的本地主机中。它可以这样：

selenium:4444

该主机名被转换为与selenium容器对应的正确IP。因此，请根据该信息调整脚本和配置。

您可以使用以下方法查找和检查docker网络：

docker network ls
docker network inspect <network-id>
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