Puppet users - Apr 2012 - multiple resources dependencies

Dear all,

I have a class where I declare one file and many execs with 
create_resources:

class module::yeah {
   file {"myfile"}
   $hash =
parseyaml(inline_template(''hereigeneratemynicehash.to_yaml''))
   create_resources (''exec'', $hash)
}

And I need to create a dependency of the kind inside that class:
File["myfile"] -> Exec[*]

I have tried setting "require" => File[''myfile'']
inside my template, but
File is not recognized inside the template. And if I quote it, Puppet 
does not recognize it as a File resource.

Do you guys see a way how I can create the dependency?

Thanks!
Pablo

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On Apr 5, 4:47 am, Pablo Fernandez <pablo.fernan...@cscs.ch>
wrote:
> Dear all,
>
> I have a class where I declare one file and many execs with
> create_resources:
>
> class module::yeah {
>    file {"myfile"}
>    $hash =
parseyaml(inline_template(''hereigeneratemynicehash.to_yaml''))
>    create_resources (''exec'', $hash)
>
> }
>
> And I need to create a dependency of the kind inside that class:
> File["myfile"] -> Exec[*]
>
> I have tried setting "require" =>
File[''myfile''] inside my template, but
> File is not recognized inside the template. And if I quote it, Puppet
> does not recognize it as a File resource.
>
> Do you guys see a way how I can create the dependency?

I see at least two possibilities:

1) Use resource chaining and tag-selected collections:
1a) either automatic tags: File["myfile"] -> Exec<| tag
''module::yeah'' |>
1b) or manual tags: File["myfile"] -> Exec<| tag =
''tag-I-explicitly-
declared-via-my-hash'' |>

2) Use resource defaults:
class module::yeah {
   file { ''myfile'': }

   # I think this is scoped to the class:
   Exec { require => File[''myfile''] }

   $hash
parseyaml(inline_template(''hereigeneratemynicehash.to_yaml''))
   create_resources (''exec'', $hash)
}


Test these, of course.  I am uncertain whether create_resources() has
different semantics in these cases than would ordinary resource
declarations.


John

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Hi John,

I like option 2) very much, but 1) opens new doors too :)

A small extract from the manual, just for clarification:
" Defaults are not global — they only affect the current scope and 
scopes below the current one. If you want a default setting to affect 
your entire configuration, your only choice currently is to specify them 
outside of any class. "

I''ve tested it, and it seems to work fine. Thanks!
BR/Pablo


On 04/05/2012 03:01 PM, jcbollinger wrote:
>
> On Apr 5, 4:47 am, Pablo Fernandez<pablo.fernan...@cscs.ch>  wrote:
>> Dear all,
>>
>> I have a class where I declare one file and many execs with
>> create_resources:
>>
>> class module::yeah {
>>     file {"myfile"}
>>     $hash =
parseyaml(inline_template(''hereigeneratemynicehash.to_yaml''))
>>     create_resources (''exec'', $hash)
>>
>> }
>>
>> And I need to create a dependency of the kind inside that class:
>> File["myfile"] ->  Exec[*]
>>
>> I have tried setting "require" => 
File[''myfile''] inside my template, but
>> File is not recognized inside the template. And if I quote it, Puppet
>> does not recognize it as a File resource.
>>
>> Do you guys see a way how I can create the dependency?
>
> I see at least two possibilities:
>
> 1) Use resource chaining and tag-selected collections:
> 1a) either automatic tags: File["myfile"] ->  Exec<| tag
> ''module::yeah'' |>
> 1b) or manual tags: File["myfile"] ->  Exec<| tag =
''tag-I-explicitly-
> declared-via-my-hash'' |>
>
> 2) Use resource defaults:
> class module::yeah {
>     file { ''myfile'': }
>
>     # I think this is scoped to the class:
>     Exec { require =>  File[''myfile''] }
>
>     $hash >
parseyaml(inline_template(''hereigeneratemynicehash.to_yaml''))
>     create_resources (''exec'', $hash)
> }
>
>
> Test these, of course.  I am uncertain whether create_resources() has
> different semantics in these cases than would ordinary resource
> declarations.
>
>
> John
>
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