[chef] Re: How to validate attribute before recipe is being executed?

[Jay Feldblum < >]

Howard,

You can do something like this in your recipe:

    my_value = node["my-cookbook"]["my-namespace"]["my-key"]

    unless my_value.kind_of?(Integer) && (1..100).include?(my_value)

      Chef::Application.fatal! "Fix your value! It was: #{my_value.inspect}"

    end

This will be executed after the attributes from all roles are applied.

This will be executed before any resources from any recipes in the run-list are converged (i.e., before the system is altered).

Cheers,

Jay

On Wed, Mar 13, 2013 at 11:18 AM, howard chen < " target="_blank"> > wrote:

For some attributes, our use case is it must be overrided by user, and
it need to follow our validation scheme, e.g. must be an integer <
100, is it possible to validate it before the recipe is being
executed?