[chef] Re: Re: Quickly check if a runlist's cookbook version constraints are satisfied?

[Harry Wilkinson < >]

Whoa, that is an awesome answer, thank you!

On 11 February 2015 at 14:12, Steven Danna < " target="_blank"> > wrote:

Hi,

Using just knife:

knife exec -E 'api.post("environments/prod/cookbook_versions",
:run_list => ["cookbook_b", "cookbook_a"])'

Where prod would be replaced by the environment and cookbook_a and
cookbook_b represent cookbooks in your runlist.  The API signature is
a little odd as the thing it calls a run_list only wants cookbooks and
not fully qualified recipe names.  If it returns successfully
(outputing nothing), the dependencies were resolvable.  If it
explodes, they were not:

knife exec -E 'api.post("environments/prod/cookbook_versions",
:run_list => ["cookbook_b", "cookbook_c"])'
ERROR: Precondition Failed
Response: {"message"=>"Run list contains invalid items: no such
cookbook cookbook_c.", "non_existent_cookbooks"=>["cookbook_c"],
"cookbooks_with_no_versions"=>[]}

> knife exec -E 'api.post("environments/prod/cookbook_versions", :run_list => ["cookbook_b", "cookbook_a"])'
ERROR: Precondition Failed
Response: {"message"=>"Run list contains invalid items: no versions
match the constraints on cookbook (cookbook_a >= 0.0.0).",
"non_existent_cookbooks"=>[],
"cookbooks_with_no_versions"=>["(cookbook_a >= 0.0.0)"]}

Noah wrote a plugin that also might be of interest:

https://github.com/coderanger/knife-solve

On Wed, Feb 11, 2015 at 1:10 PM, Harry Wilkinson < "> > wrote:
> Hi all.
>
> Is there some nice convenient way to check whether cookbook constraints can
> be satisfied for a given runlist in a given environment?
>
> I'm trying to add a lot of new constraints to an environment that has had
> almost none for quite a while. At first I just added a simple constraint for
> every cookbook to specify that each one must be the latest available
> version, but I quickly found that made the dependencies unsolvable for some
> runlists, as some cookbooks (eg. the nginx community cookbook) have
> pessimistic version constraints.
>
> I would like to check that the dependencies are solvable without having to
> actually verify a real convergence on every single runlist (there are a lot
> of them). Is there some easy way to exercise that dependency resolution
> process on its own?
>
> Thanks.
>
> Harry
> --
> Harry Wilkinson | Manager, Cloud Engineering | Medidata Solutions Worldwide
> Metro Building, 1 Butterwick, Hammersmith, London W6 8DL
> Twitter: @harwilk
>
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--

Harry Wilkinson | Manager, Cloud Engineering | Medidata Solutions Worldwide

Metro Building, 1 Butterwick, Hammersmith, London W6 8DL  

Twitter: @harwilk

The information in this transmittal and any attachments are confidential and intended only for the recipient(s) listed above.  

You are hereby notified that any unauthorized distribution or copying of this transmittal or its attachments is prohibited.  

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