Add support for rbd in glance

Add support for Ceph/rbd in glance.
Unit test added to spec.

Add package dependency "python-ceph" accordingly to a patch from
Michael Jeanson <mjeanson@gmail.com>.

Change-Id: I0908cde951994db6aba74d2ce3415126c429a76e

README.md

@@ -100,7 +100,7 @@ glance is a combination of Puppet manifest and ruby code to deliver configuratio
 Limitations
 ------------
 
-* Only supports configuring the file and swift storage backends.
+* Only supports configuring the file, swift and rbd storage backends.
 
 Development
 -----------

manifests/backend/rbd.pp

@@ -0,0 +1,27 @@
+#
+# configures the storage backend for glance
+# as a rbd instance
+#
+#  $rbd_store_user - Optional.
+#
+#  $rbd_store_pool - Optional. Default:'images',
+#
+
+class glance::backend::rbd(
+  $rbd_store_user = undef,
+  $rbd_store_pool = 'images',
+) {
+  include glance::params
+
+  glance_api_config {
+    'DEFAULT/default_store':     value => 'rbd';
+    'DEFAULT/rbd_store_user':    value => $rbd_store_user;
+    'DEFAULT/rbd_store_pool':    value => $rbd_store_pool;
+  }
+
+  package { 'python-ceph':
+    ensure => 'present',
+    name   => $::glance::params::pyceph_package_name,
+  }
+
+}

manifests/params.pp

@@ -3,6 +3,7 @@
 class glance::params {
 
   $client_package_name = 'python-glanceclient'
+  $pyceph_package_name = 'python-ceph'
 
   case $::osfamily {
     'RedHat': {

spec/classes/glance_backend_rbd_spec.rb

@@ -0,0 +1,26 @@
+require 'spec_helper'
+
+describe 'glance::backend::rbd' do
+  let :facts do
+    {
+      :osfamily => 'Debian'
+    }
+  end
+
+  let :params do
+    {
+      :rbd_store_user  => 'user',
+    }
+  end
+
+  it { should contain_glance_api_config('DEFAULT/default_store').with_value('rbd') }
+  it { should contain_glance_api_config('DEFAULT/rbd_store_user').with_value('user') }
+  it { should contain_glance_api_config('DEFAULT/rbd_store_pool').with_value('images') }
+
+  it { should contain_package('python-ceph').with(
+      :name   => 'python-ceph',
+      :ensure => 'present'
+    )
+  }
+
+end