Add the volume_type_id attribute for volumes

This change adds the volume_type_id attribute to volume.size
notification samples and the volume Gnocchi resource type.

The volume_type_id attribute contains the ID for the volume type
of a volume. The current volume_type attribute stores the name
of the volume type instead.

The volume.size pollster already adds the volume_type_id
attribute to polling samples, so no changes were required there.

Note that the volume_type attribute returned by Cinder volume
notifications is actually the volume type ID (not the name).
This causes issues when populating the volume_type attribute
in Gnocchi, addressed in another patch [1].

[1]: https://review.opendev.org/c/openstack/ceilometer/+/940758

Change-Id: I079be170f10357e001bbe1c17df8541bf523d402

ceilometer/data/meters.d/meters.yaml

@@ -130,6 +130,7 @@ metric:
     metadata:
       display_name: $.payload.display_name
       volume_type: $.payload.volume_type
+      volume_type_id: $.payload.volume_type
       image_id: $.payload.glance_metadata[?key=image_id].value
       instance_id: $.payload.volume_attachment[0].server_id
 

ceilometer/gnocchi_client.py

@@ -200,6 +200,15 @@ resources_update_operations = [
          "value": {"type": "string", "min_length": 0, "max_length": 255,
                    "required": False}
      }]},
+    {"desc": "add volume_type_id to volume",
+     "type": "update_attribute_type",
+     "resource_type": "volume",
+     "data": [{
+         "op": "add",
+         "path": "/attributes/volume_type_id",
+         "value": {"type": "string", "min_length": 0, "max_length": 255,
+                   "required": False}
+     }]},
 ]
 
 

ceilometer/publisher/data/gnocchi_resources.yaml

@@ -242,6 +242,7 @@ resources:
     attributes:
       display_name: resource_metadata.(display_name|name)
       volume_type: resource_metadata.volume_type
+      volume_type_id: resource_metadata.volume_type_id
       image_id: resource_metadata.image_id
       instance_id: resource_metadata.instance_id
     event_delete:

releasenotes/notes/add-volume_type_id-attr-f29af86534907941.yaml

@@ -0,0 +1,17 @@
+---
+features:
+  - |
+    Added the ``volume_type_id`` attribute to ``volume.size`` notification
+    samples, which stores the ID for the volume type of the given volume.
+  - |
+    Added the ``volume_type_id`` attribute to ``volume`` resources in Gnocchi,
+    which stores the ID for the volume type of the given volume.
+upgrade:
+  - |
+    ``meters.yaml`` has been updated with changes to the ``volume.size``
+    notification meter. If you override this file in your deployment,
+    it needs to be updated.
+  - |
+    ``gnocchi_resources.yaml`` has been updated with changes to the
+    ``volume`` resource type. If you override this file in your deployment,
+    it needs to be updated.