Puppet users - Nov 2011 - Accessing definition parameter value out of scope

Hi everybody.

i''m running Puppet 2.6.2 and I have the following problem.

Assuming I have a definition toto::tutu instanced as follows:

------------------%< -------------------
define toto::tutu ($key = ''default_val'') { ... }


toto::tutu { ''example1'': key => ''val1'' }
toto::tutu { ''example2'': key => ''val2'' }
------------------------------------------

Is there now a way in another scope (for instance in the definition
''tata'' to access the value ''val2'' for
instance?

I was hoping that the syntax

$val = Toto::Tutu[''exemple2''][key]

would work but that''s not the case. Any suggestion?

Note that the problem comes from the fact that I''m dealing here with
definitions and not classes. Classes are uniquely defined (and
instanced) such that I would then be able to access the value of the
key parameter by toto::tutu::key (assuming of course I did not
duplicate the instanciation).

Thanks!





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On Nov 15, 7:07 am, Falkor <sebastien.varre...@gmail.com>
wrote:
> Hi everybody.
>
> i''m running Puppet 2.6.2 and I have the following problem.
>
> Assuming I have a definition toto::tutu instanced as follows:
>
> ------------------%< -------------------
> define toto::tutu ($key = ''default_val'') { ... }
>
> toto::tutu { ''example1'': key =>
''val1'' }
> toto::tutu { ''example2'': key =>
''val2'' }
> ------------------------------------------
>
> Is there now a way in another scope (for instance in the definition
> ''tata'' to access the value ''val2'' for
instance?
>
> I was hoping that the syntax
>
> $val = Toto::Tutu[''exemple2''][key]
>
> would work but that''s not the case. Any suggestion?

To my knowledge, you cannot access variables of a defined type
instance.  I''m not sure they even exist outside the definition.  What
you can do is establish a source of truth outside the definition that
the definition and all other interested parties draw on.  That could
be a variable in some shared lexical scope, a global or class
variable, or external data accessed via extlookup() or hiera.  That
would be a pretty good design strategy even if you were using classes
rather than definitions.


John

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