docker - 如何使用serverspec测试Jenkins是否在jenkins docker容器中运行？

Question

我试图证明Jenkins在由官方docker hub jenkins镜像构建的容器中运行。

require "serverspec"
require "docker"

describe "Dockerfile" do
  before(:all) do
    image = Docker::Image.build_from_dir('./images/jenkins')

    set :os, family: :debian
    set :backend, :docker
    set :docker_image, image.id
  end

  describe process("java") do
    it { should be_running }
  end
end

我得到以下结果:

Failures:

  1) Dockerfile Process "java" should be running
     Failure/Error: it { should be_running }
       expected Process "java" to be running

     # ./spec_jenkins.rb:24:in `block (3 levels) in <top (required)>'

我是否误解是针对从生成的镜像实例化的容器运行测试？

Answer 1

Jenkins (Jenkins)官方图像定义了一个ENTRYPOINT而不是CMD。

但是，specinfra查找CMD，如果找不到，则使用/bin/sh。

IOW，specinfra不运行Jenkins。我的测试失败的原因。

通过指定正确的docker_container_create_options，specinfra也可以启动Jenkins并通过测试。

工作代码:

require "serverspec"
require "docker"

describe "Dockerfile" do
  before(:all) do
    image = Docker::Image.build_from_dir('./images/jenkins')

    set :os, family: :debian
    set :backend, :docker
    set :docker_image, image.id
    set :docker_container_create_options, {'Cmd' => ['/usr/local/bin/jenkins.sh']}
  end

  describe process("java") do
    it { should be_running }
  end
end