Question

我正在将一些木偶清单转换成厨师。在其中一个模块中，我遇到了一些已定义的资源类型。

据我所知，到目前为止，大厨为此功能提供的是轻量级资源提供商（LWRP），但不是那些用纯Ruby编写的吗？

Answer 1

将Puppet的自定义资源转换为类似Chef的代码有很多选择。

LWRPs

正如您所提到的，LWRP（或轻量级资源和提供程序）是实现自定义Chef扩展的最简单方法（我更喜欢使用术语＆＃34;扩展＆＃34;因为它最有意义）。 Chef中的所有东西都是用＃34; plain-Ruby＆＃34;编写的，用于Ruby的某些子集。您可以阅读有关LWRPs in the docs的更多信息，但这只是一个简单的例子：

# peanuts/resources/eat.rb
actions :eat, :stomp
default_action :delete

attribute :thing, kind_of: String
attribute :other_thing, kind_of: Fixnum

# peanuts/providers/eat.rb
action :eat do
  # This is Ruby, but in the context of Chef, so you can use recipe snippets:
  template '/foo/bar/blitz.txt'

  # You can also use straight-up Ruby
  File.open('/path', 'wb') { |f| f.write('...') }

  # You can also use "raw" Chef
  remote = Chef::Resource::RemoteFile.new('/path/to/save', run_context)
  remote.source('https://github.com/file/file.tar.gz')
  remote.run_action(:create_if_missing)
end

这将在名为peanuts_eat的食谱中公开自定义资源：

peanuts_eat 'whatever' do
  thing 'string'
  other_thing 1
end

HWRPs

如果您熟悉Ruby，这是最简单的模式。 LWRP只是创建真正的Ruby类的一个方便的DSL。您可以read more about them here，但它们看起来像这样：

class Chef
  class Resource::Peanuts < Resource
    def thing 
      set_or_return(:thing, kind_of: String)
    end

    def other_thing 
      set_or_return(:thing, kind_of: Fixnum)
    end
  end

  class Provider::PeanutsEat < Provider
    def action_eat
      # This is Ruby, but in the context of Chef, so you can use recipe snippets:
      template '/foo/bar/blitz.txt'

      # You can also use straight-up Ruby
      File.open('/path', 'wb') { |f| f.write('...') }

      # You can also use "raw" Chef
      remote = Chef::Resource::RemoteFile.new('/path/to/save', run_context)
      remote.source('https://github.com/file/file.tar.gz')
      remote.run_action(:create_if_missing)
    end
  end
end

用法与LWRP示例相同

LHWRPs

最后，你可以将两者结合起来：

class Chef
  class Resource::Peanuts < Resource::LWRPBase
    actions :eat, :stomp
    default_action :delete

    attribute :thing, kind_of: String
    attribute :other_thing, kind_of: Fixnum
  end

  class Provider::PeanutsEat < Provider::LWRPBase
    action(:eat) do
      # This is Ruby, but in the context of Chef, so you can use recipe snippets:
      template '/foo/bar/blitz.txt'

      # You can also use straight-up Ruby
      File.open('/path', 'wb') { |f| f.write('...') }

      # You can also use "raw" Chef
      remote = Chef::Resource::RemoteFile.new('/path/to/save', run_context)
      remote.source('https://github.com/file/file.tar.gz')
      remote.run_action(:create_if_missing)
    end
  end
end

Chef相当于Puppet定义的资源类型

1 个答案:

LWRPs

HWRPs

LHWRPs