Puppet users - May 2010 - puppet arrays, and selectors...

G''day.

I have a problem.  Mostly a theoretical problem, granted, but a problem:

We have machines with a variety of hardware RAID controllers, and some that
don''t have one at all.  We want these monitored, which usually involves
some
vendor-specific binary blob, plus support code, installed and running.

Supporting *a* RAID controller isn''t too hard; I have a fact that pulls
that
out and lets me install the right support.

In the event we got two RAID controllers in a single machine (or,
theoretically, I run into this elsewhere), how would I best go about this?

As far as I can tell, this doesn''t work; it matches nothing, ever:

    $test = [''one'', ''two'']
    case $test {
        ''one'': { ... }
        ''two'': { ... }
    }

So, how can I make decisions about the content of that array?

My best guess, right now, is that I would need to use a define, then expand
that using the array as the name, and have the content perform the case
statement to include the appropriate class.  Ick.

  define what_a_nasty_hack () {
      case $name {
          ''one'': { ... }
          ''two'': { ... }
      }
  }

  what_a_nasty_hack { $test: }


Anyway, is there a better way to handle this that I can''t see right
now, or is
this perhaps something that the language could stand enhancing?

Regards,
        Daniel
-- 
✣ Daniel Pittman            ✉ daniel@rimspace.net            ☎ +61 401 155 707
               ♽ made with 100 percent post-consumer electrons

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On May 3, 2010, at 7:22 AM, Daniel Pittman wrote:
> G''day.
>
> I have a problem.  Mostly a theoretical problem, granted, but a  
> problem:
>
> We have machines with a variety of hardware RAID controllers, and  
> some that
> don''t have one at all.  We want these monitored, which usually  
> involves some
> vendor-specific binary blob, plus support code, installed and running.
>
> Supporting *a* RAID controller isn''t too hard; I have a fact that
> pulls that
> out and lets me install the right support.
>
> In the event we got two RAID controllers in a single machine (or,
> theoretically, I run into this elsewhere), how would I best go about  
> this?
>
> As far as I can tell, this doesn''t work; it matches nothing, ever:
>
>    $test = [''one'', ''two'']
>    case $test {
>        ''one'': { ... }
>        ''two'': { ... }
>    }
>
> So, how can I make decisions about the content of that array?
>
> My best guess, right now, is that I would need to use a define, then  
> expand
> that using the array as the name, and have the content perform the  
> case
> statement to include the appropriate class.  Ick.
>
>  define what_a_nasty_hack () {
>      case $name {
>          ''one'': { ... }
>          ''two'': { ... }
>      }
>  }
>
>  what_a_nasty_hack { $test: }
>
>
> Anyway, is there a better way to handle this that I can''t see
right
> now, or is
> this perhaps something that the language could stand enhancing?
It probably is a deserved language enhancement, but in the short term  
a function is your best bet.

-- 
Getting caught is the mother of invention. --Robert Byrne
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Luke Kanies  -|-   http://puppetlabs.com   -|-   +1(615)594-8199

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