Question

基于此article，我成功创建了可扩展的selenium网格。然后我想用Pytest运行我的测试套件[用Python编写]到该网格中。

我是Docker的新手，并试图找到将我的测试程序迁移到微服务架构的最佳方法。从本质上讲，我希望让开发人员能够在他们的PC上本地设置完整的测试基础架构。

所以，我有4个 Dockerfiles 和1个 docker-compose.yml 。

BASE dockerfile：

FROM ubuntu

ENV SEL_VERSION 2.44.0

# Update repos for Java
RUN apt-get update -qqy \
&& apt-get -qqy --no-install-recommends install \
software-properties-common \
&& rm -rf /var/lib/apt/lists/*
RUN add-apt-repository -y ppa:webupd8team/java

RUN echo debconf shared/accepted-oracle-license-v1-1 select true | debconf-set-selections
RUN echo debconf shared/accepted-oracle-license-v1-1 seen true | debconf-set-selections

# Install Java7
RUN apt-get update -qqy \
&& apt-get -qqy --no-install-recommends install \
oracle-java7-installer \
&& rm -rf /var/lib/apt/lists/*

# Download Selenium Server
RUN wget http://selenium-release.storage.googleapis.com/${SEL_VERSION%.*}/selenium-server-standalone-${SEL_VERSION}.jar

HUB dockerfile：

FROM org/grid:base

EXPOSE 4444

# Add and set permissions to the script that will launch the hub
ADD register-hub.sh /var/register-hub.sh
RUN chmod 755 /var/register-hub.sh

# start a shell and run the script
#WORKDIR /
CMD ["/bin/bash", "/var/register-hub.sh"]

NODE dockerfile：

FROM org/grid:base

# set the FF version to use
ENV FIREFOX_MINOR 34.0.5

# Update and install what's needed
RUN apt-get update -qqy \
&& apt-get -qqy --no-install-recommends install \
firefox \
xvfb \
bzip2 \
&& rm -rf /var/lib/apt/lists/*

# setup FF
RUN [ -e /usr/bin/firefox ] && rm /usr/bin/firefox
ADD https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/${FIREFOX_MINOR}/linux-x86_64/en-US/firefox-${FIREFOX_MINOR}.tar.bz2 /tmp/
RUN apt-get install -q -y libdbus-glib-1-2
RUN tar -xvjf /tmp/firefox-${FIREFOX_MINOR}.tar.bz2 -C /opt/
RUN chmod -R +x /opt/firefox/
RUN ln -s /opt/firefox/firefox /usr/bin/firefox

# add and set permissions for the bash script to register the node
ADD register-node.sh /var/register-node.sh
RUN chmod 755 /var/register-node.sh

# start a shell and run the script
CMD ["/bin/bash", "/var/register-node.sh"]

PYTEST dockerfile：

# Starting from base image
FROM ubuntu

# Set the Github personal token [to clone the QA code]
#todo------secret------
ENV GH_TOKEN some_token_some_token_some_token_

# Install Python & pip
RUN apt-get update
RUN apt-get upgrade -y
RUN apt-get install -y python python-pip python-dev && pip install --upgrade pip

# Install GIT
RUN apt-get update -y && apt-get install git -y

# [in the / folder] Create the folder and add the whole project from the repo to the container
RUN git clone https://$GH_TOKEN:x-oauth-basic@github.com/org/org_QA.git /org_QA_folder

# Install dependencies via pip
WORKDIR /org_QA_folder
RUN pip install -r dependencies.txt

#
CMD /bin/bash

docker-compose文件：

hub:
  image: org/grid:hub # image must already exist
  ports:
    - "4444:4444" # HOST:CONTAINER
  external_links: # link to a container created outside of this YAML file
    - pytest
  volumes_from:
    - pytest # must be created first

firefox:
  image: org/grid:nodeff # image must already exist
  links:
    - hub
  expose:
    - "5555" # grid console open to public

所以...我无法理解我应该如何运行“py.test /org_QA_folder/testcase.py”之类的东西并在网格上运行[本质上是节点]。

我首先运行pytest容器 docker run -dit -v /org_QA_folder --name pytest schoox/grid:py以及docker-compose up -d的其他服务。

我尝试了多种方法：

不使用Pytest容器，而是克隆集线器中的代码。但在这种情况下，HUB容器运行网格的中心[每个容器指令一个CMD]。 [编辑：我选择了Docker建议的微服务架构]
我让hub和node容器运行其指定的服务，并创建一个单独的容器[pytest]从那里发送测试。但测试不会运行，因为这个容器没有xvfb。 [编辑：我刚刚安装了xvfb并且工作了]
我尝试将pytest容器用作集线器的卷，但仍然存在从已经运行服务的集线器容器运行测试的问题。 [编辑：出于开发目的，我挂载代码从pytest容器中使用它的控制台来测试其他容器上的东西。之后，我将使用pytest容器将代码分开]

我应该在其他容器中安装该节点容器所有的所有软件包吗？理想情况下，我想使用pytest容器控制台[至少开发基础设施]来运行将发送到集线器并运行到许多节点的测试。 [编辑：我没有与集线器和节点混在一起，我刚刚在pytest容器上安装了xvfb]

你会怎么建议这样做？我错过了什么吗？

编辑[迈向解决方案的步骤]：

我首先启动pytest容器[docker run -dit -v /org/org_QA_folder --name pytest org/grid:py]，然后运行docker-compose up -d启动网格

在撰写文件中，我使用external_links和volumes_from作为开发目的。设置完成后，我不会在任何容器内工作。

我更改了Pytest dockerfile并添加了这个：

# Install xvfb [THAT WAS NEEDED!!!!!]
RUN apt-get install -y xvfb

我运行我的一个测试，从pytest容器内部到我已经运行的Grid [在EC2实例上]作为概念证明并且工作正常。它仍然是发送到dockerized网格。

Answer 1

我认为你几乎就在那里。

我会向pytest添加docker-compose.yml服务，并从volumes_from图片中移除external_links和hub（这样看起来更像您链接的博客文章中的示例。

pytest服务将运行python代码，但它应连接到hub以运行selenium。我相信org_QA_folder中的某个位置有试图在本地启动selenium的配置。需要重新配置它以使用hub服务器。

Answer 2

我终于让它像这样工作：

从我的代码我用这个：

class Fixtures_docker(unittest.TestCase):

    def setUp(self, hub_ip="http://HUB_CONTAINER_IP", hub_port=4444):
        print "--Fixtures_docker in config.py trying to run on--: %s:%s"%(hub_ip, hub_port)

        if platform.system() == 'Linux':
            from pyvirtualdisplay import Display

            self.display = Display(visible=0, size=(1024, 768))
            self.display.start()

        if browser == "Firefox": 
            self.wd = webdriver.Remote(
                command_executor=hub_ip + ':' + str(hub_port) + '/wd/hub',
                    desired_capabilities={
                        #FIREFOX
                        "browserName"   : "firefox",
                        # "maxInstances"  : 10,
                        "seleniumProtocol": "WebDriver",
                        "platform"      : "ANY",
                        "node"          : hub_port
                })

        # for debugging purposes from local machine
        elif browser == "Firefox" and os == "Windows":
            self.wd = webdriver.Remote(
                command_executor=hub_ip + ':' + str(hub_port) + '/wd/hub',
                    desired_capabilities={
                        # FIREFOX -> WINDOWS
                        # "firefox_binary":"C:\\firefox3\Firefox3.exe", # path to find another version of ff
                        "browserName"   : "firefox",
                        #"version"      : "3.0b3", # trying to run a specific ff version
                        "platform"      : "WINDOWS",
                        "node"          : hub_port,
                        "maxSession"    : 5
                })

        self.wd.implicitly_wait(10)

    def tearDown(self):
        self.wd.quit()
        if platform.system() == 'Linux':
            self.display.stop()

并在docker-compose.yml：

中

hub:
  image: org/grid:hub # image must already exist
  ports:
    - "8080:4444" # HOST:CONTAINER
  external_links: # link to a container created outside of this YAML file
    - pytest
  volumes_from:
    - pytest # must be created first
  expose:
    - "4444" # intercontainer communication [other containers with selenium server]

firefox:
  image: org/grid:nodeff # image must already exist
  links:
    - hub
  expose:
    - "5555" # intercontainer communication [node registers to hub]

使用Pytest，Selenium Grid和Docker

2 个答案: