Cross-module variables and hiera

00

I'm using puppet 3 with roles (mostly), profiles, and hiera. In one module
(profiles::collectd) I use hiera_array to get the values for pdxcat/collectd's
module's tcpconns_localports variable. When I define all of the values I want
in hiera, everything is fine. However, I would like to also define values in a
profile's class rather than having to define it in every role's yaml file that
includes said profile. I haven't been able to get that to work yet.

hiera.yaml

---
:hierarchy:
  - nodes/%{::fqdn}
  - sites-roles/%{::site}/%{::role}
  - roles/%{::role}
  - sites/%{::site}
  - operatingsystemrelease/%{::operatingsystemrelease}
  - operatingsystemmajrelease/%{::operatingsystemmajrelease}
  - operatingsystem/%{::operatingsystem}
  - osfamily/%{::osfamily}
  - virtualization/%{::virtual}
  - common

hiera:common.yaml

---
classes:
  - profiles::collectd

profiles::collectd::tcpconns_localports:
  - 22

profiles::collectd::tcpconns_remoteports:
  - 22
  - 25
  - 80
  - 443
  - 3306
  - 5432
  - 8140
  - 8192
  - 61613

hiera:roles:app-db.yaml

---
classes:
  - profiles::postgresql::server
  - profiles::postgresql::client

postgresql::globals::version: '9.3'
postgresql::server::listen_addresses: '*'

# Adding this here works as expected:
#profiles::collectd::tcpconns_localports:
#  - 5432

modules:profiles:manifest:postgresql:server.pp

class profiles::postgresql::server {
  class { '::postgresql::server': }
  
  # I would like to be able to add this here so I don't have to remember to
  # add it to every %{::role}.yaml which includes this class.
  #$::profiles::collectd::tcpconns_localports += [ '5432' ]
}

modules:profiles:manifests:collectd.pp

class profiles::collectd {

  # This is an array lookup so multiple hiera files can add ports to watch.
  $tcpconns_localports  = hiera_array('profiles::collectd::tcpconns_localports')
  $tcpconns_remoteports = hiera_array('profiles::collectd::tcpconns_remoteports')

  # NOTE: If you need to pass "false" onto the collectd config make sure to
  # quote the false (foo => 'false') as some templates only do a simple if
  # statement (if @foo) which when foo is undef evaluates to false.

  class { '::collectd':
    purge        => true,
    purge_config => true,
    recurse      => true,
  }
  
  class { '::collectd::plugin::tcpconns':
    listening   => 'false',
    localports  => $tcpconns_localports,
    remoteports => $tcpconns_remoteports,
  }
}