Support Swift Billing

Below changes are done in this patch for Swift billing:

1. Add new config section for conf.yaml to extract container
size from Ceilometer

2. Setting correct container name

Change-Id: I1752ad73b9a9f973371cd692fc7d1ca31b35a0d2

distil/database.py

@@ -61,11 +61,17 @@ class Database(object):
         query = self.session.query(Resource).\
             filter(Resource.id == resource_id,
                    Resource.tenant_id == tenant_id)
+
         if query.count() == 0:
             info = self.merge_resource_metadata({'type': resource_type},
                                                 entry, md_def)
             if resource_type == 'Virtual Machine':
                 info['os_distro'] = self._get_os_distro(entry)
+            if resource_type == 'Object Storage Container':
+                # NOTE(flwang): It's safe to get container name by /, since
+                # Swift doesn't allow container name with /.
+                idx = resource_id.index('/') + 1
+                info['name'] = resource_id[idx:]
             self.session.add(Resource(
                 id=resource_id,
                 info=json.dumps(info),

examples/conf.yaml

@@ -163,6 +163,19 @@ collection:
         name:
           sources:
             - name
+    -
+      meter: storage.containers.objects.size
+      service: o1.standard
+      type: Object Storage Container
+      transformer: GaugeMax
+      unit: byte
+      # NOTE(flwang): Nothing in resource_metadata from ceilometer actually.
+      # But to avoid any unnecessary issue and keeping consistency. Just keep
+      # 'name' as default key.
+      metadata:
+        name:
+          sources:
+            - name
 # transformer configs
 transformers:
   uptime: