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 normally write something like this:
class foo(
$parameter = undef,
) {...}
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.
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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