[Puppet Users] using hiera for node classification

Hi All,

I've been trying to use Hiera for node classification, my sit.pp is simple:

node default {
hiera_include("classes")
}

which has been working well with simple class definitions like:

user@host$ cat testagent.yaml 2012-06-18 14:55:48 jon pts/13
---
classes:
- motd

Is anyone doing this in production? I've seen a little about this on line
but it seems to be mostly toy cases like the above. If so, is it possible
to pass in parameterized classes this way, like:

user@host$ cat openstackall.yaml 2012-06-18 14:56:01 jon pts/13
---
classes:
- openstack::all: {
public_address: %{ipaddress_eth0},
public_interface: eth0,
private_interface: eth1,
admin_email: nobody@csail.mit.edu,
admin_password: admin_password,
keystone_admin_token: keystone_admin_token,
nova_user_password: nova_user_password,
glance_user_password: glance_user_password,
rabbit_password: rabbit_password,
rabbit_user: rabbit_user,
libvirt_type: kvm,
fixed_range: 10.0.0.0/24 }

The above doesn't work, probably because I'm simply using the wrong
structure...

Thanks,
-Jon

ps if you saw this on the -dev list, mea culpa, auto complete misfire
reposting here where it belongs....