[chef] Re: Testing idempotence of chef cookbooks

[Roland Moriz < >]

Hi,

Am 20.05.2015 um 10:21 schrieb " class=""> :

Hi,

is there a general way or best practice for testing idempotence of chef cookbooks?

An approach might be to use test-kitchen + duplicate suite names + a custom chef-handler that writes the number of updated resources to disk + serverspec to verify it.

e.g. .kitchen.yaml

-8<---

suites:

  - name: default

    run_list:

      - recipe[chef-handler]

      - recipe[build-essential]

    attributes:

  - name: default

    run_list:

      - recipe[chef-handler]

      - recipe[build-essential]

    attributes:

-8<---

this will converge the node twice on „kitchen converge“.

An example for a simple chef handler: https://github.com/jtimberman/chef-handler-updated-resources/blob/master/lib/chef/handler/updated_resources.rb - use https://supermarket.chef.io/cookbooks/chef_handler to deploy the handler to your testing node.

Instead of logging to Chef::Log you could just write the number of updated resources to a log file e.g. /tmp/updated_resources and use http://serverspec.org/resource_types.html#file to verify.

hth

best regards

Roland