On Thu, Feb 18, 2010 at 1:29 PM, Peter Meier <peter.me...@immerda.ch> wrote:
>> On 18/02/10 11:14 PM, Frederik Wagner wrote:
>>>
>>> unluckily there is no direct loop to do this, puppets array (and hash)
>>> handling is rather rudimentary.
>>
>> A hash construct will probably be present in the next major release
>> of Puppet: Rowlf.
>
> besides that, it might be also worth to think about what you like to do.
> There have been several threads about this topic in the past on this list
> and while examining the actual problem one tried to solve, the actual
> solution was nearly always to solve the problem in a different and better
> way.
generally I agree, but I was thinking a long time to get a way of
dealing with a specific problem:
I pass (via a YAML configuration) an array parameter with
interface/network configurations to a network configuration class.
The parameters looks like:
$ifcfgs = [ eth0#00:11:22:33:44:55#1234:1234::1/64,10.20.30.40/24##,
eth1#00:11:22:33:44:55#11.22.33.44/24##]
>From this I want to generate the ifcfg-eth0/1 files. Here a loop would
be really handy (and hash handling too, to make it more readable).
The only solution I found, was to extract the interfaces with the
regsubst-function as an array, calling a define where I extract the
relevant configuration element from the $ifcfgs via an inline_template
(in the end calling another define...).
As far as I understand it's still declarative, but very complicated
for a simple problem.
Bye
Frederik
>
> Remember puppet is a declarative langauge, which is order independent unless
> you specify one. It is the intend of the puppet language, well this fits in
> general for external DSLs, to only have a specific set of instruction to
> address the domain it was invented for.
>
> So far I missed looping only a few times and in general if I re-thought the
> actual problem I tried to solve, I came up with a cleaner solution without
> looping.
>
> So if you don't see any other solution than loops you could outline your
> problem and somebody might be able to help you.
>
> cheers pete
>
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