Generating a unique node id per hostname in Puppet

To generate a unique integer ID in Puppet, we can use the hostname and convert is to base 10 using a erb inline template.

	#
	# Generate a unique integer id base on the hostname
	# It works by stripping $domain from the $::fqdn,
	# removing all characters except alphanumeric and converting to base 10
	# $domain is provided if you have complex domains like *.hosting.example.com
	#
	class uniqueid (
	$domain = $::domain,
	) {
	$node_id = inline_template("<%= '$::fqdn'.gsub('$domain','').gsub(/[^a-z0-9]/i,'').to_i(36) %>")
	}

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