scenario001: deploy Glance with RBD backend

* Allow glance.pp to configure RBD backend.
* Switch scenario001 to run Glance with RBD backend.
* Update README with more documentation about Glance backends.

Change-Id: Ib2dd8a83b5b6a3c39030c44f5e6a0ae7db31c12c

README.md

@@ -34,7 +34,7 @@ scenario](#All-In-One).
 |     -      | scenario001 | scenario002 | scenario003 |
 |:----------:|:-----------:|:-----------:|:-----------:|
 | keystone   |      X      |       X     |       X     |
-| glance     |      X      |       X     |       X     |
+| glance     |     rbd     |     file    |     file    |
 | nova       |      X      |       X     |       X     |
 | neutron    |      X      |       X     |       X     |
 | cinder     |      X      |             |       X     |

fixtures/scenario001.pp

@@ -18,7 +18,9 @@ include ::openstack_integration
 include ::openstack_integration::rabbitmq
 include ::openstack_integration::mysql
 include ::openstack_integration::keystone
-include ::openstack_integration::glance
+class { '::openstack_integration::glance':
+  backend => 'rbd',
+}
 include ::openstack_integration::neutron
 include ::openstack_integration::nova
 include ::openstack_integration::cinder

manifests/glance.pp

@@ -1,4 +1,13 @@
-class openstack_integration::glance {
+# Configure the Glance service
+#
+# [*backend*]
+#   (optional) Glance backend to use.
+#   Can be 'file' or 'rbd'.
+#   Defaults to 'file'.
+#
+class openstack_integration::glance (
+  $backend = 'file',
+) {
 
   rabbitmq_user { 'glance':
     admin    => true,
@@ -18,17 +27,37 @@ class openstack_integration::glance {
     password => 'glance',
   }
   include ::glance
-  include ::glance::backend::file
   include ::glance::client
   class { '::glance::keystone::auth':
     password => 'a_big_secret',
   }
+  case $backend {
+    'file': {
+      include ::glance::backend::file
+      $backend_store = ['file']
+    }
+    'rbd': {
+      class { '::glance::backend::rbd':
+        rbd_store_user => 'openstack',
+        rbd_store_pool => 'glance',
+      }
+      $backend_store = ['rbd']
+      # make sure ceph pool exists before running Glance API
+      Exec['create-glance'] -> Service['glance-api']
+    }
+    default: {
+      fail("Unsupported backend (${backend})")
+    }
+  }
+  $http_store = ['http']
+  $glance_stores = concat($http_store, $backend_store)
   class { '::glance::api':
     debug               => true,
     verbose             => true,
     database_connection => 'mysql+pymysql://glance:glance@127.0.0.1/glance?charset=utf8',
     keystone_password   => 'a_big_secret',
     workers             => 2,
+    known_stores        => $glance_stores,
   }
   class { '::glance::registry':
     debug               => true,