Puppet users - Aug 2014 - Style - hiera/params/puppet/template

Greetings all,

In the pre-hiera days, it was commonly recommended to write classes with 
params like this:

class my_class::params {
     $config_param = 'default value'
}

class my_class (
     $config_param = $myclass:params::config_param
) inherits myclass::params {
     ...
}

However, now that much overriding, customising etc has moved into Hiera, 
this ends up being very verbose, redundant and error-prone, especially 
if there are a lot of parameters (to go into a config template, for 
example). The same parameter name may end up in four different places in 
common cases: hiera, params, class decl and the config template.

So I would like to know if people are still doing this as much as 
possible. What is the remaining benefit in declaring defaults in params 
rather than in the class declaration directly? Is there a more up to 
date style guide that does away with the verbosity and duplication, or 
is the old params class style still widely recommended?

Thanks for any suggestions,

-Taj.

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