[APIImpact] Add quota-api spec
Change-Id: I6346db541f6307b1c53147390b02b3d87c5e28f8
This commit is contained in:
Dan Smith
parent
967266b047
commit
9239abf099
|
|
@ -0,0 +1,195 @@
|
|||
..
|
||||
This work is licensed under a Creative Commons Attribution 3.0 Unported
|
||||
License.
|
||||
|
||||
http://creativecommons.org/licenses/by/3.0/legalcode
|
||||
|
||||
================
|
||||
Glance Quota API
|
||||
================
|
||||
|
||||
https://blueprints.launchpad.net/glance/+spec/quota-api
|
||||
|
||||
In the Xena cycle, Glance gained quota support. Through the use of
|
||||
unified limits, it was possible to implement this without introducing
|
||||
an API. However, for full functionality and a better user experience,
|
||||
Glance should expose an API so that users can see their current usage
|
||||
(and limit) instead of just receiving an error when they go over. This
|
||||
spec outlines the addition of that API.
|
||||
|
||||
|
||||
Problem description
|
||||
===================
|
||||
|
||||
Glance users can now be limited by quotas set by the operator, but are
|
||||
unable to see their current usage (and limits) in any way other than
|
||||
the error message they receive when they go over. An API is required
|
||||
to expose the limit and usage to the user.
|
||||
|
||||
|
||||
Proposed change
|
||||
===============
|
||||
|
||||
Glance already has an information discovery API, which will be used as
|
||||
a base for exposing the information: a new route for ``/info/quota``
|
||||
will be added. Information exposed will include the limit and current
|
||||
usage for each quota type for the calling user. If a quota is
|
||||
disabled, then the limit for that element will be exposed as ``-1`` in
|
||||
accordance with Keystones "unlimited" sentinel notation.
|
||||
|
||||
Alternatives
|
||||
------------
|
||||
|
||||
We could continue to have no API.
|
||||
|
||||
Data model impact
|
||||
-----------------
|
||||
|
||||
None
|
||||
|
||||
REST API impact
|
||||
---------------
|
||||
|
||||
This spec includes a single new endpoint:
|
||||
|
||||
**New API**
|
||||
|
||||
* List quotas
|
||||
|
||||
**Common Response Codes**
|
||||
|
||||
* Success: `200 OK`
|
||||
* Failure: `400 Bad Request` with details
|
||||
* Forbidden: `403 Forbidden`
|
||||
|
||||
**[New API] List quotas**
|
||||
|
||||
List all quotas available for the user::
|
||||
|
||||
GET /v2/info/quotas
|
||||
{
|
||||
"quotas": {
|
||||
"image_size_total": {
|
||||
"usage": 32,
|
||||
"limit": 1024
|
||||
},
|
||||
"image_staging_total": {
|
||||
"usage": 0,
|
||||
"limit": 1024
|
||||
},
|
||||
"image_count_total": {
|
||||
"usage": 4,
|
||||
"limit": 100
|
||||
},
|
||||
"image_count_uploading": {
|
||||
"usage": 0,
|
||||
"limit": 10
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Response codes:
|
||||
|
||||
* 200 -- Upon authorization and successful request. The response body
|
||||
contains the JSON payload with quota information.
|
||||
* 400 -- Quota information is not available (likely due to
|
||||
configuration or backend error)
|
||||
* 403 -- Permission denied
|
||||
|
||||
JSON schema for the response::
|
||||
|
||||
'usage': {
|
||||
'type': 'array',
|
||||
'items': {
|
||||
'type': 'object',
|
||||
'additionalProperties': True,
|
||||
'validation_data': {
|
||||
'type': 'object',
|
||||
'additonalProperties': False,
|
||||
'properties': {
|
||||
'usage': {'type': 'integer'},
|
||||
'limit': {'type': 'integer'},
|
||||
},
|
||||
},
|
||||
},
|
||||
},
|
||||
|
||||
|
||||
Security impact
|
||||
---------------
|
||||
|
||||
The other information discovery APIs do not check any policy, and none
|
||||
will be added for this new quota API. It is assumed that there is no
|
||||
reason to disable a user's view of their own usage and limit
|
||||
information. The former is already visible by listing current
|
||||
resources and doing the math.
|
||||
|
||||
Notifications impact
|
||||
--------------------
|
||||
|
||||
None.
|
||||
|
||||
Other end user impact
|
||||
---------------------
|
||||
|
||||
A glanceclient and openstackclient change will be required to expose
|
||||
this to interactive users.
|
||||
|
||||
Performance Impact
|
||||
------------------
|
||||
|
||||
None.
|
||||
|
||||
Other deployer impact
|
||||
---------------------
|
||||
|
||||
No impact beyond the requirements for enabling quotas in general.
|
||||
|
||||
Developer impact
|
||||
----------------
|
||||
|
||||
None.
|
||||
|
||||
Implementation
|
||||
==============
|
||||
|
||||
Assignee(s)
|
||||
-----------
|
||||
|
||||
Primary assignee:
|
||||
danms
|
||||
|
||||
Work Items
|
||||
----------
|
||||
|
||||
* Implement the API with unit/functional tests
|
||||
* Document the API in api-ref
|
||||
* Write a tempest test to check the API
|
||||
* Implement support in OpenstackClient
|
||||
* Implement support in glanceclient
|
||||
* Client docs
|
||||
|
||||
|
||||
Dependencies
|
||||
============
|
||||
|
||||
* This will require a bump to an (already-released) new version of
|
||||
oslo.limit in order to query the limits without active enforcement.
|
||||
|
||||
Testing
|
||||
=======
|
||||
|
||||
Unit and functional tests in Glance. Tempest tests against the
|
||||
existing quota-enabled jobs.
|
||||
|
||||
|
||||
Documentation Impact
|
||||
====================
|
||||
|
||||
The api-ref will need updating, as well as usage information for the
|
||||
interactive clients.
|
||||
|
||||
References
|
||||
==========
|
||||
|
||||
* https://specs.openstack.org/openstack/glance-specs/specs/xena/approved/glance/glance-unified-quotas.html
|
||||
|
|
@ -6,5 +6,10 @@ Yoga Approved Specifications
|
|||
:glob:
|
||||
:maxdepth: 1
|
||||
|
||||
TODO: fill this in until a new approved space is added.
|
||||
Yoga approved specs for glance:
|
||||
|
||||
.. toctree::
|
||||
:glob:
|
||||
:maxdepth: 1
|
||||
|
||||
glance/*
|
||||
|
|
|
|||
Loading…
Reference in New Issue