Add Pagination To Other Resources¶
https://blueprints.launchpad.net/cinder/+spec/add-pagination-to-other-resource
This spec aims to continue the work that we did in Liberty, adding pagination support to other cinder resources.
Problem description¶
In Liberty release, we have added pagination to backups and snapshots according bp[1]. There are still some work that hasn’t been done yet. In Mitaka, we intend to add pagination support to CG, Volume Type and Qos specs.
Use Cases¶
In large scale cloud systems, end users and manage system that’s on top of Cinder could make quick querying by using pagination, filter and sort functions to improve performance of querying.
Proposed change¶
Consistency Group: Refactor current implementation, using DB pagination querying, and add support to filter and sort in querying request.
Volume Type: Add pagination and sort support in querying request.
Qos Specs: Add pagination, filter and sort in querying request.
Add sql pagination querying support as we did in backup and snapshot.
Alternatives¶
None
Data model impact¶
None
REST API impact¶
According the API-wg guideline about pagination, filter and sort[2]:
GET /v2/{project_id}/{resource}?limit=xxx&marker=xxx&sort=xxx&{filter}=xxx
RESP BODY: {"resource_links": [{xxx}],
"resource": [{xxx}, {xxx}, ..., {xxx}]
}
Security impact¶
None
Notifications impact¶
None
Other end user impact¶
None
Performance Impact¶
None
Other deployer impact¶
None
Developer impact¶
None
Implementation¶
Assignee(s)¶
- Primary assignee:
wanghao<wanghao749@huawei.com>
- Other contributors:
None
Work Items¶
Add pagination support to three resources. * Implement code in db pagination query. * Implement code in list querying api. * Test code.
Update cinderclient to support this functionality for those resources.
Add change to API doc.
Dependencies¶
None
Testing¶
Both unit and Tempest tests are needed to be created to cover the code change.
Documentation Impact¶
The cinder API documention will need to be updated to reflect the REST API changes.
References¶
[1]https://blueprints.launchpad.net/cinder/+spec/extend-limit-implementations [2]https://github.com/openstack/api-wg/blob/master/guidelines/pagination_filter_sort.rst
