add missing instance meta

flavor_id, flavor_name, display_name and host are required... we need to
include them when we build sample from notification.

host does not exist in compute.instance.create.start messages because
(i assume) nova doesn't know which host to create on yet.

also, when multiple metrics missing same resource, only attempt to
create once.

Change-Id: Ia680ad23608f6712ebce619797e2968f8acc6310
(cherry picked from commit 48d9cb7793)

ceilometer/dispatcher/gnocchi.py

@@ -392,8 +392,8 @@ class GnocchiDispatcher(dispatcher.MeterDispatcherBase,
 
     @staticmethod
     def _extract_resources_from_error(e, resource_infos):
-        resource_ids = [r['original_resource_id']
-                        for r in e.message['detail']]
+        resource_ids = set([r['original_resource_id']
+                            for r in e.message['detail']])
         return [(resource_infos[rid]['resource_type'],
                  resource_infos[rid]['resource'])
                 for rid in resource_ids]

ceilometer/meter/data/meters.yaml

@@ -109,6 +109,13 @@ metric:
     project_id: $.payload.tenant_id
     resource_id: $.payload.instance_id
     user_metadata: $.payload.metadata
+    metadata: &instance_meta
+      host: $.payload.host
+      flavor_id: $.payload.instance_flavor_id
+      flavor_name: $.payload.instance_type
+      display_name: $.payload.display_name
+      host: $.payload.host
+      image_ref: $.payload.image_meta.base_image_ref
 
   - name: 'vcpus'
     event_type: 'compute.instance.*'
@@ -119,6 +126,8 @@ metric:
     project_id: $.payload.tenant_id
     resource_id: $.payload.instance_id
     user_metadata: $.payload.metadata
+    metadata:
+       <<: *instance_meta
 
   - name: 'compute.instance.booting.time'
     event_type: 'compute.instance.create.end'
@@ -130,6 +139,8 @@ metric:
     project_id: $.payload.tenant_id
     resource_id: $.payload.instance_id
     user_metadata: $.payload.metadata
+    metadata:
+      <<: *instance_meta
 
   - name: 'disk.root.size'
     event_type: 'compute.instance.*'
@@ -140,6 +151,8 @@ metric:
     project_id: $.payload.tenant_id
     resource_id: $.payload.instance_id
     user_metadata: $.payload.metadata
+    metadata:
+       <<: *instance_meta
 
   - name: 'disk.ephemeral.size'
     event_type: 'compute.instance.*'
@@ -150,6 +163,8 @@ metric:
     project_id: $.payload.tenant_id
     resource_id: $.payload.instance_id
     user_metadata: $.payload.metadata
+    metadata:
+       <<: *instance_meta
 
   - name: 'bandwidth'
     event_type: 'l3.meter'