Puppet users - Jul 2014 - Using hiera-data for a specific node

Hi list!

I have a problem integrating puppet and hiera.

Our puppet-master and all nodes are running puppet 3.6.2. On the master,
hiera version 1.3.4 is installed.

I want to use some hiera-data in a class depending on the node. To be
less abstract, I have this class:

  class memcached::server{
    $cap = hiera('memcached.cap', 64)

    # package and service omitted here

    if is_integer($cap) {
      file { '/etc/memcached.conf':
        ensure     => present,
        content    => template('memcached/memcached.conf.erb'),
        notify     => Service['memcached'];
      }
    } else {
      fail("memory \$cap should be an integer")
    }
  }

In a future refactoring, I may promote $cap to be a class-parameter
and also use the validation from the stdlib.

But first, I want to get 'memcached.cap' from a node-specific file.

Puppet is configured with "hiera_config = /etc/puppet/hiera.yaml".
The file /etc/puppet/hiera.yaml is as follows:

  ---
  :backends: yaml
  :yaml:
    :datadir: /var/lib/hiera
  :hierarchy:
    - %{clientcert}
    - common
  :logger: console

This is - from the docs - the internal default with just one hierarchy 
added.

I do not have the value "memcached.cap" in the
/var/lib/hiera/common.yaml
I do have a file /var/lib/hiera/shop-01.hoster.de which contains

  memcached.cap: 256

Using this configs manually via the CLI, I get the expected result:

  $ sudo hiera memcached.cap -d -c /etc/puppet/hiera.yaml -y 
/var/lib/puppet/yaml/facts/shop-01.hoster.de.yaml
  DEBUG: Wed Jul 23 18:49:39 +0200 2014: Hiera YAML backend starting
  DEBUG: Wed Jul 23 18:49:39 +0200 2014: Looking up memcached.cap in YAML 
backend
  DEBUG: Wed Jul 23 18:49:39 +0200 2014: Looking for data source 
shop-01.hoster.de
  DEBUG: Wed Jul 23 18:49:39 +0200 2014: Found memcached.cap in 
shop-01.hoster.de
  256

So far, everything is nice. BTW, when I change the %{clientcert} to
%{::clientcert} is does work through the CLI anymore.

I cannot get the same data through puppet.

What am I doing wrong? Where - apart from the source-code - can I look
for information how that lookup works?

Thanks,
Matthias Viehweger

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