Puppet users - Oct 2012 - how to intercept a catalog and perform a diff

I''m re-reading the puppet docs 
http://docs.puppetlabs.com/learning/manifests.html and just noticed this 
footnote

 If you drastically refactor your manifest code and want to make sure it 
still generates the same configurations, 
you can just intercept the catalogs and use a special diff tool on them;

but the footnote doesn''t say how to do that or point to any
documentation.
I''ve been looking for a way to do exactly that for some time now and 
haven''t succeeded in finding it, can anyone point me to documentation
or
give me a list of simple steps to "intercept a catalog" or what this 
"special diff tool" would be?




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On Mon, 2012-10-29 at 08:25 -0700, Kevin G. wrote:
> I''m re-reading the puppet docs
> http://docs.puppetlabs.com/learning/manifests.html and just noticed
> this footnote
> 
>  If you drastically refactor your manifest code and want to make sure
> it still generates the same configurations, 
> you can just intercept the catalogs and use a special diff tool on
> them;
> 
> 
> but the footnote doesn''t say how to do that or point to any
> documentation. I''ve been looking for a way to do exactly that for
some
> time now and haven''t succeeded in finding it, can anyone point me
to
> documentation or give me a list of simple steps to "intercept a
> catalog" or what this "special diff tool" would be?
You can check this awesome tool by RI:
https://github.com/ripienaar/puppet-catalog-diff

It''s now available as a Forge module, which should even more help using
it.

It produces a report that lists the differences between catalogs
(old/new resources, and differences between changed resources).

It is specifically useful when upgrading a puppet master to a new
version to spot differences in behavior.
-- 
Brice Figureau
Follow the latest Puppet Community evolutions on www.planetpuppet.org!

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----- Original Message -----
> From: "Kevin G." <kgoess@bepress.com>
> To: puppet-users@googlegroups.com
> Sent: Monday, October 29, 2012 3:25:08 PM
> Subject: [Puppet Users] how to intercept a catalog and perform a diff
> 
> I''m re-reading the puppet docs
> http://docs.puppetlabs.com/learning/manifests.html and just noticed
> this footnote
> 
> If you drastically refactor your manifest code and want to make sure
> it still generates the same configurations,
> you can just intercept the catalogs and use a special diff tool on
> them;
> 
> but the footnote doesn''t say how to do that or point to any
> documentation. I''ve been looking for a way to do exactly that for
> some time now and haven''t succeeded in finding it, can anyone
point
> me to documentation or give me a list of simple steps to "intercept
> a catalog" or what this "special diff tool" would be?
if you are on puppet 3 you can install the ripienaar-catalog_diff module
from the forge and then use the ''puppet catalog diff'' command.

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On 2012-29-10 16:25, Kevin G. wrote:
> I''m re-reading the puppet docs
> http://docs.puppetlabs.com/learning/manifests.html and just noticed this
> footnote
>
>   If you drastically refactor your manifest code and want to make sure
> it still generates the same configurations,
> you can just intercept the catalogs and use a special diff tool on them;
>
> but the footnote doesn''t say how to do that or point to any
> documentation. I''ve been looking for a way to do exactly that for
some
> time now and haven''t succeeded in finding it, can anyone point me
to
> documentation or give me a list of simple steps to "intercept a
catalog"
> or what this "special diff tool" would be?
>
There is also a catalog diff available in Cloudsmih''t Stackhammer
online
tool. Checkout http://www.cloudsmith.com

Regards
- henrik


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