ffu: Introduce Glance fast-forward upgrade tasks

fast_forward_upgrade_tasks for Glance covering Ocata and Pike.
- Service status check
- Stop services when updating from Ocata to Pike
- Update glance packages
- Db sync

bp fast-forward-upgrades
Change-Id: I292bf2cbff38eb67b71321b4ca76454e07a0d370

docker/services/glance-api.yaml

@@ -261,3 +261,43 @@ outputs:
             - remove_glance_package|bool
       metadata_settings:
         get_attr: [GlanceApiPuppetBase, role_data, metadata_settings]
+      fast_forward_upgrade_tasks:
+        - name: Check if glance_api is deployed
+          command: systemctl is-enabled --quiet openstack-glance-api
+          ignore_errors: True
+          register: glance_api_enabled
+        - name: Check if glance_registry is deployed
+          command: systemctl is-enabled --quiet openstack-glance-registry
+          ignore_errors: True
+          register: glance_registry_enabled
+        - name: Stop openstack-glance-api
+          service: name=openstack-glance-api state=stopped enabled=no
+          when:
+            - step|int == 2
+            - release == 'ocata'
+            - glance_api_enabled.rc == 0
+        - name: Stop openstack-glance-registry
+          service: name=openstack-glance-registry state=stopped enabled=no
+          when:
+            - step|int == 2
+            - release == 'ocata'
+            - glance_registry_enabled.rc == 0
+        - name: glance package update
+          yum:
+            name: '{{ package }}'
+            state: latest
+          when:
+            - step|int == 6
+            - is_bootstrap_node|bool
+          loop_control:
+            loop_var: package
+          with_items:
+            - python-glance-store
+            - python-glanceclient
+            - openstack-glance
+            - python-glance
+        - name: glance db sync
+          command: glance-manage db_sync
+          when:
+            - step|int == 8
+            - is_bootstrap_node|bool