Take a look at Example42's Next Gen modules on github. They all do what you're
asking about and a bit more
There is a routine defined within the puppi module, that the rest of the
modules use to lookup variable values. Defaults are assigned in params.pp which
the main class inherits and they are defined as parameters. So, the variable
can be set via a default, parameter, or hiera. This makes it very flexible.
Steven
> Date: Wed, 3 Oct 2012 17:02:45 +0200
> From: jso...@srce.hr
> To: puppet-users@googlegroups.com
> Subject: [Puppet Users] hiera and fallback to params?
>
> Hi.
>
> I would like to setup my manifests, so that variable data is gathered
> from hiera, if it's available there, and if not, then to fallback on
> some predefined value...
>
> Something like this:
>
> $my_var = hiera('myvar') || 'base_value'
>
> So if there is no myvar in hiera data, that manifest falls back to
> base_value. Is that possible somehow?
>
>
>
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