glance/api-ref/source/v2/discovery.inc
Dan Smith f865b8cac7 [APIImpact] Quota usage API
This adds a /v2/info/usage API endpoint which exposes to the user
their current limits and usage.

The discovery API does not (appear to) have existing tests, so this
adds a module for that, although only usage tests are added currently.

Implements: blueprint quota-api
Change-Id: I50c98bac50f815bdb9baae024e77afd388f74554
2022-02-03 09:55:50 -08:00

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.. -*- rst -*-
Image Service Info (Discovery)
******************************
General information
~~~~~~~~~~~~~~~~~~~
These calls allow you to discover useful information about what
services you may consume from a particular deployment of the
OpenStack Image Service.
.. _import-discovery-call:
Import methods and values discovery
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. rest_method:: GET /v2/info/import
Returns information concerning the constraints around image import in
the cloud in which the call is made, for example, supported container
formats, supported disk formats, maximum image size, etc. This call
contains a ``import-methods`` field consisting of an array of string
identifiers indicating what import methods are supported in the cloud
in which the call is made.
*(Since Image API v2.6)*
.. note::
In the Image API v2.6-2.8, this discovery call contains
**only** the ``import-methods`` field.
Normal response codes: 200
Error response codes: 400, 401, 403
Request
-------
There are no request parameters.
This call does not allow a request body.
Response Parameters
-------------------
.. rest_parameters:: images-parameters.yaml
- import-methods: import-methods
Response Example
----------------
.. literalinclude:: samples/image-info-import-response.json
:language: json
.. _store-discovery-call:
List stores
~~~~~~~~~~~
.. rest_method:: GET /v2/info/stores
A multiple store backend support is introduced in the Rocky release
as a part of the EXPERIMENTAL Image API v2.8.
.. note:: The Multi Store feature is introduced as EXPERIMENTAL in Rocky and
its use in production systems is currently **not supported**.
The feature is being finalized during the Train development
cycle and is expected to be fully supported in Image API v2.9.
In version 2.7 of the API, this call will return a 404 (Not Found).
Use the :ref:`API versions call <versions-call>` to determine
what API versions are available in your cloud.
Normal response codes: 200
Error response codes: 404
Request
-------
There are no request parameters.
This call does not allow a request body.
Response Parameters
-------------------
.. rest_parameters:: discovery-parameters.yaml
- stores: stores
Response Example
----------------
.. literalinclude:: samples/stores-list-response.json
:language: json
Quota usage
~~~~~~~~~~~
.. rest_method:: GET /v2/info/usage
The user's quota and current usage are displayed, if enabled by
server-side configuration.
Normal response codes: 200
Request
-------
There are no request parameters.
This call does not allow a request body.
Response Example
----------------
.. literalinclude:: samples/usage-response.json
:language: json