RunData

Chef handler to write out to disk a successful-run-data.json file which contains the information about the node at the end of the previous run.

The Chef docs [1] lay out a pretty simple way to use handlers by leveraging the chef_handler resource. Just ship the chef-handler-run-data.rb file to your handlers location and declare a new handler:

cookbook_file "#{node[:chef_handler][:handler_path]}/chef-handler-run-data.rb" do
  source 'chef-handler-run-data.rb'
  mode 00600
end

chef_handler 'RunData' do
  source "#{node[:chef_handler][:handler_path]}/chef-handler-run-data.rb"
  action :enable
end

Obviously make sure to copy the ruby file into the /files/default directory of your cookbook as well. Alternatively, install it as a Rubygem and source it that way:

chef_gem 'chef-handler-run-data' do
  action :install
end

chef_handler 'RunData' do
  source ::File.join(Gem.all_load_paths.grep(/chef-handler-run-data/).first,
                     'chef-handler-run-data.rb')
  action :enable
end

[1] http://docs.opscode.com/essentials_handlers_install.html

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