Add swift::storage::loopbacks class

This patch adds a wrapper for the storage::loopback definition, making
it possible to add multiple loopback devices using a Hiera hash.

Loopback devices are the preferred method if there is only a single
local disk with one partition, instead of just using a directory that is
created on the root filesystem.

This patch is very similar to I3692b17988f8eacb7b8a7df1006a7fe24f587065.

Change-Id: I11a230b7cf08a4cc2a144d9af0e6c81bb3827348

manifests/storage/loopbacks.pp

@@ -0,0 +1,29 @@
+# Copyright 2016 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# == Class: swift::storage::loopbacks
+#
+# Class wrapper for the benefit of Hiera users
+#
+# === Parameters:
+#
+# [*args*] A Swift 'loopback' config hash
+#   Optional. Defaults to a empty hash
+#
+# [*defaults*] A config hash
+#   Optional. Defaults to a empty hash
+#
+class swift::storage::loopbacks($args = {}, $defaults = {}) {
+  create_resources(swift::storage::loopback, $args, $defaults)
+}

releasenotes/notes/swift-loopbacks-class-9b24b216099c7d98.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - Adds a wrapper class for the storage::loopback
+    definition, making it possible to add multiple loopback
+    devices using a Hiera hash.

spec/classes/swift_storage_loopbacks_spec.rb

@@ -0,0 +1,51 @@
+# Copyright 2016 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+require 'spec_helper'
+
+describe 'swift::storage::loopbacks' do
+
+  shared_examples_for 'swift storage loopbacks' do
+    let :params do
+      {
+        :args => {
+          'loop0' => {
+            'seek' => '50000',
+          },
+          'loop1' => {
+          },
+        },
+      }
+    end
+
+    it {
+      is_expected.to contain_swift__storage__loopback('loop0').with(
+        :seek => '50000')
+      is_expected.to contain_swift__storage__loopback('loop1')
+    }
+  end
+
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge!(OSDefaults.get_facts())
+      end
+
+      it_configures 'swift storage loopbacks'
+    end
+  end
+
+end