[chef] Re: Logging and references questions

[Daniel DeLeo < >]

On Wednesday, April 16, 2014 at 4:16 AM, Christian Fröstl wrote:

> Hi there,
>  
> I have problems with understanding the logging procedure with chef.  
>  
> I can log some information by using the following syntax:  
> log „foo" do
> level :debug
> end
>  
>  
> Now I find in some cookbooks the following spelling:  
> Chef::Log.debug("Node has Chef Server Recipe? 
> #{node.recipe?("chef-server")}“)


This blog post is a pretty awesome and thorough description of how 
chef-client has two stages: compile and converge: 
http://erik.hollensbe.org/2013/03/16/the-chef-resource-run-queue/

`Chef::Log.debug` is a method call that writes a string to the logger, which 
then writes it do some device (or not, depending on your log level, etc.). 
The log resource puts an item in the resource_collection queue. In the 
converge phase chef iterates over this queue, and will eventually run this 
code https://github.com/opscode/chef/blob/master/lib/chef/provider/log.rb ;
which you can see is more or less the same as Chef::Log.debug(). So the 
primary difference is the timing.
  
>  
> What does Chef::Log.debug exactly do?  
> I do not get any output if i run the chef-client in normal or in debug 
> mode. What is the STDOUT from Chef::Log?

Did you configure chef to log to a file? Check your client.rb.
  
>  
> By the way, I am not really sure what Chef:: represents. Where can I find 
> the class or module Chef?  
> In some scripts I the other references like Chef::Client::SANE_PATHS. Where 
> can I find the content of such references?
>  
> Sorry if the questions are a litte bit stupid, but I am right new in 
> writing Code.
One easy way to spelunk the code is to clone the git repo from here: 
https://github.com/opscode/chef and use `git grep` to search the codebase.
  
>  
>  
> Thank you very much,  
>  
> Christian  
HTH,

--  
Daniel DeLeo