如何使用应用程序cookbook定义before_symlink回调？

Question

我正在开发一本食谱来部署一个简单的基于jekyll的博客.我使用'application'cookbook作为基础.一切顺利,但厨师只是忽略了我定义的回调.

Chef日志包含有关我的回调的条目,但我看不到回调执行的错误或结果.

这是recipes/default.rb文件:

include_recipe "git"

application "example_com" do
  path "/var/www/example.com"
  repository "git@example.org:xxx/xxx.git"
  revision "master"

  deploy_key <<EOF
-----BEGIN RSA PRIVATE KEY-----
..skip...
-----END RSA PRIVATE KEY-----
EOF

  # before_symlink "script/bootstrap"

  before_deploy do
    # raise
    # Chef::Log.info("INSANE!")
    execute "bundle exec rake generate" do
      cwd release_path
    end
  end
end

以下是chef-client表示执行before_deploy回调的日志:

[2012-10-06T10:06:20-04:00] INFO: Processing ruby_block[example_com before_deploy] action create (/var/cache/chef/cookbooks/application/providers/default.rb line 107)
[2012-10-06T10:06:20-04:00] DEBUG: Got callback before_deploy: #<Proc:0x00007f0509788088@/var/cache/chef/cookbooks/example_com/recipes/default.rb:24>
[2012-10-06T10:06:20-04:00] INFO: application[example_com] running callback before_deploy
[2012-10-06T10:06:20-04:00] INFO: ruby_block[example_com before_deploy] called
[2012-10-06T10:06:20-04:00] INFO: Processing deploy_revision[example_com] action deploy (/var/cache/chef/cookbooks/application/providers/default.rb line 122)

我也尝试使用string定义回调,但结果是一样的.当没有带回调定义的文件时,Chef会显示错误,如果文件位于正确的位置,则会忽略该文件.

更新1

在深入挖掘Chef内部消息后,我意识到回调是在单独的主厨中执行的,而这不会立即发生.当应用程序cookbook中的代码调用_recipe_eval_来评估回调体时,Chef会创建单独的runner,并且在调用converge方法之前代码不会执行.

所以,我修改了应用程序的烹饪书.我在_recipe_eval_之后添加了调用converge,一切都开始工作了.

我认为这是一个错误,我将在官方Opscode跟踪器中创建一个问题.但是,任何评论都非常欢迎!

这是application/libraries/default.rb的修改版本:

class Chef
  class Provider
    module ApplicationBase

    # ...skip...

      def callback(what, callback_code=nil)
        Chef::Log.debug("Got callback #{what}: #{callback_code.inspect}")
        @collection = Chef::ResourceCollection.new
        case callback_code
        when Proc
          Chef::Log.info "#{@new_resource} running callback #{what}"
          # recipe_eval(&callback_code)
          recipe_eval(&callback_code)
          converge # <--- Remove this line and no callbacks will work.
        when String
          callback_file = "#{release_path}/#{callback_code}"
          unless ::File.exist?(callback_file)
            raise RuntimeError, "Can't find your callback file #{callback_file}"
          end
          run_callback_from_file(callback_file)
        when nil
          nil
        else
          raise RuntimeError, "You gave me a callback I don't know what to do with: #{callback_code.inspect}"
        end
      end
    end
  end
end

Answer 1

Opscode 刚刚确认这是 Chef 中的一个错误。如果有人需要更多详细信息和修复状态，请使用以下链接：

• http://tickets.opscode.com/browse/COOK-1747
• http://tickets.opscode.com/browse/CHEF-3493