Consider GlanceMultistoreConfig when setting glance_pool

With glance supporting multiple stores we need to update glance_pool
so that it explores the content of GlanceMultistoreConfig to see if
any of the configured backends are of rbd type.

We also add a the CephClusterName parameter into the CI rbd_store
multistore for Glance, which is a mandatory parameter to correctly
set the permissions on the keyring files of every Ceph cluster.

Co-Authored-By: Yatin Karel <ykarel@redhat.com>
Change-Id: Iee670befb2bcbaa2b666c6b99f5153391b62049e

ci/environments/scenario001-standalone.yaml

@@ -132,6 +132,7 @@ parameter_defaults:
       GlanceBackend: rbd
       GlanceStoreDescription: 'RBD glance store'
       CephClientUserName: 'glance'
+      CephClusterName: ceph
   GnocchiBackend: rbd
   CinderEnableIscsiBackend: false
   BannerText: |

deployment/cephadm/ceph-base.yaml

@@ -102,6 +102,35 @@ parameters:
   CinderBackupRbdPoolName:
     default: backups
     type: string
+  GlanceMultistoreConfig:
+    type: json
+    default: {}
+    description: |
+      Dictionary of settings when configuring additional glance backends. The
+      hash key is the backend ID, and the value is a dictionary of parameter
+      values unique to that backend. Multiple rbd and cinder backends are allowed, but
+      file and swift backends are limited to one each. Example:
+        # Default glance store is rbd.
+        GlanceBackend: rbd
+        GlanceStoreDescription: 'Default rbd store'
+        # GlanceMultistoreConfig specifies a second rbd backend, plus a cinder
+        # backend.
+        GlanceMultistoreConfig:
+          rbd2_store:
+            GlanceBackend: rbd
+            GlanceStoreDescription: 'Second rbd store'
+            CephClusterName: ceph2
+            # Override CephClientUserName if this cluster uses a different
+            # client name.
+            CephClientUserName: client2
+          cinder1_store:
+            GlanceBackend: cinder
+            GlanceCinderVolumeType: 'volume-type-1'
+            GlanceStoreDescription: 'First cinder store'
+          cinder2_store:
+            GlanceBackend: cinder
+            GlanceCinderVolumeType: 'volume-type-2'
+            GlanceStoreDescription: 'Seconde cinder store'
   GlanceRbdPoolName:
     default: images
     type: string
@@ -540,12 +569,13 @@ outputs:
                   glance_pool:
                     name: {get_param: GlanceRbdPoolName}
                     enabled:
-                      if:
+                      or:
+                        - yaql:
+                            data: {get_param: GlanceMultistoreConfig}
+                            expression: $.data.values().where($ != null).GlanceBackend.contains("rbd")
                         - equals:
                             - {get_param: GlanceBackend}
                             - 'rbd'
-                        - true
-                        - false
                   cinder_pool:
                     name: {get_param: CinderRbdPoolName}
                     enabled: {get_param: CinderEnableRbdBackend}