Description of problem:

When a floating ip address is deleted from the instance the entry is removed from the nova database. Gnocchi only stores the UUID of the floating ip. So the IP address can not longer be looked up via the UUID because floating ip entry has been deleted from the nova database. Can we add the IP address of the floating ip in the gnocchi/ceilometer database. So on deletion in the nova database, the IP address of the floating ip is not lost.

Version-Release number of selected component (if applicable):


How reproducible:
When floating ip is deleted from an instance

Steps to Reproduce:
1.gnocchi resource show --type network <UUID>
2.Can see floating ip UUID
3.Delete floating ip from instance
4.Cannot find IP address of that floating ip

Actual results:
gnocchi resource show --type network 09c8ad65-6022-4e76-9356-7fba70bf9dbe
+-----------------------+----------------------------------------------------------+
| Field                 | Value                                                    |
+-----------------------+----------------------------------------------------------+
| created_by_project_id | 9857425c0d684004a9eaf1f19eb9c95d                         |
| created_by_user_id    | 4bd1241b70cc4ae6a12413a8aac7e35c                         |
| ended_at              | None                                                     |
| id                    | 09c8ad65-6022-4e76-9356-7fba70bf9dbe                     |
| metrics               | bandwidth: 3be0c23d-8135-4d71-a297-a579546f4cf0          |
|                       | ip.floating.create: 0c2e3c25-aa8a-4488-af61-8121b01766e1 |
|                       | ip.floating.update: 52de269e-c151-4cf9-b9a8-55e15c6ff69c |
|                       | ip.floating: d8201749-3123-459e-a978-7ea232a5010f        |
|                       | network.create: da52dc44-a709-41d2-9cfb-540d28ad09d4     |
|                       | network.update: a2241c7f-987e-4d21-b190-14b0df50303f     |
|                       | network: 7493ce9d-343c-4560-b2a4-5a544a1952a3            |
|                       | port.create: 30d7c4c2-f32a-402a-9f26-351d9a46836d        |
|                       | port.update: 7acf1163-fa5a-4dc4-bdfe-ddda009c464e        |
|                       | port: 98ac5217-5aa8-424c-9af9-5dca003b3bf2               |
|                       | router.create: 6be0994e-8cac-4932-a995-cf5b511b5a82      |
|                       | router.update: 7fe50303-38ae-4e99-bb1d-fd032c0f37a6      |
|                       | router: 4a2a8403-0981-4617-a2a1-3955b7f44fd8             |
|                       | subnet.create: 928209af-fbb5-4e8d-94ac-7fa502f8eb02      |
|                       | subnet.update: 70d99756-d804-49d5-be44-7654998ac5b7      |
|                       | subnet: c8fee00c-dea9-465c-874d-b226b8014e78             |
| original_resource_id  | 09c8ad65-6022-4e76-9356-7fba70bf9dbe                     |
| project_id            | e3f89e23831543ffb6c3b02180f8a42f                         |
| revision_end          | None                                                     |
| revision_start        | 2018-04-11T17:31:17.051422+00:00                         |
| started_at            | 2018-04-11T17:31:17.051408+00:00                         |
| type                  | network                                                  |
| user_id               | None                                                     |
+-----------------------+----------------------------------------------------------+
openstack floating ip show <UUID of floating ip>

returns nothing

Expected results:
openstack metric measures show <UUID of floating ip>
returns IP address of floating ip

Additional info: