Sometimes we want/need to add/gather extra metadata for the samples
being handled by Ceilometer Dynamic pollsters, such as the project
name, domain id, domain name, and other metadata that are not always
accessible via the OpenStack component where the sample is gathered.
For instance, when gathering the status of virtual machines (VMs) from
Nova, we only have the tenant_id, which must be used as the project_id.
However, for billing and later invoicing one might need/want the
project name, domain id, and other metadata that are available in
Keystone (and maybe some others that are scattered over other
components). To achieve that, one can use the OpenStack metadata
enrichment option. This feature is only available to OpenStack
pollsters, and can only gather extra metadata from OpenStack APIs.
This patch introduces a new option in the OpenStack Dynamic pollsters,
that enable operators to enrich sample's metadata with information that
can be captured in other OpenStack APIs such as Keystone, Nova, Neutron,
and many others.
Change-Id: I079bf26cf26fcbcf678dba10469516a1dcb52c0d
fbb4b6d264