On 3 December 2012 22:38, Vaidas Jablonskis <jablons...@gmail.com> wrote:
> Hi Pete,
>
> It depends on what version of puppet you use. If you use 3.x, then it has
> hiera built-in. So it's very simple to write classes which are compatible
> with v2.7 or v3.x versions.
>
I am testing on 3.
I normally write something like this:
>
> class foo(
> $parameter = undef,
> ) {...}
>
Ah nice.
That's pretty logical.
I didn't think of doing that.
What that means is that puppet will automatically call
> hiera('foo::parameter') and tries to find a value for $parameter in the
> hierarchy if it cannot find it, then the value of $parameter will be equal
> to undef.
>
Ah I wasn't aware I could define vars like that in Hiera.
Is it as simple putting this in one of my data files?
foo::parameter: value
Pete
>
> On Monday, 3 December 2012 03:42:08 UTC, Pete wrote:
>>
>> Hi everyone,
>>
>> I currently have a giant file with default variables I use in a lot of my
>> modules and I override those at the node level if I need to.
>> I thought I would give porting that data into a hiera setup.
>>
>> I worked out how to specify my data sources and started to make a go at
>> moving some of my variables in the default data file.
>>
>> I thought heira would be smart and set a variable to undef if it couldn't
>> find it but that doesn't seem to be the case. (unless I missed something in
>> the rather sparse documentation)
>> Is there a way of telling it to do this?
>>
>> I was also trying to work out how I automagically get my parametized
>> classed to pull in vars from hiera. (The docs on that don't tell me much
>> either.)
>> Can anyone tall me how that works? Or do I have to use the hiera
>> functions which isn't automagical in my book.
>>
>> My current variables are set with a default value in my main file and
>> then I override those at the node level if I need to (so kind of the same
>> way hiera does it anyway)
>>
>> So given all of that I can't see any reason to switch to using heira
>> because my current setup works as-is (my variable file is getting pretty
>> huge anyway but that isn't going to change with heira if it won't set a var
>> to undef).
>>
>> What are the benefits or using an external source for variables instead
>> of sticking them in my node definitions (which seems like it would be
>> faster because it doesn't have to use an external source)?
>>
>> Thanks in advance.
>> Pete.
>>
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