OpenStack Compute (nova)

Use in_tree getting allocation candidates

Registered by Tetsuro Nakamura on 2017-09-05

In Stein, we introduced ``in_tree=<rp_uuid>`` parameter in placement for the
``GET /allocation_candidates`` endpoints, which limits the response to
resource providers within the same tree of the specified resource provider.

This blueprint proposes to use this parameter for optimization when we move
instances and the target host is already picked before asking to the scheduler.

Blueprint information

Status:: Complete

Approver:: Matt Riedemann

Priority:: Medium

Drafter:: Tetsuro Nakamura

Direction:: Approved

Assignee:: Tetsuro Nakamura

Definition:: Approved

Series goal:: Accepted for train

Implementation:: Implemented

Milestone target:: train-1

Started by: Eric Fried on 2019-04-11

Completed by: Matt Riedemann on 2019-05-03

Related branches

Related bugs

Sprints

Whiteboard

Gerrit topic: https://review.openstack.org/#q,topic:bp/use-placement-in-tree,n,z

Addressed by: https://review.openstack.org/646029
Spec: Use in_tree getting allocation candidates

Addressed by: https://review.openstack.org/649534
Add in_tree field to RequestGroup object

Addressed by: https://review.openstack.org/649535
node_uuid from RequestSpec to ResourceRequest

Addressed by: https://review.openstack.org/650877
Add get_compute_nodes_by_host_or_node()

Addressed by: https://review.openstack.org/650878
Pass target host to RequestGroup.in_tree

Gerrit topic: https://review.openstack.org/#/q/topic:bug/1777591

The functional changes for this series are merged so I'm marking this complete for Train. -- mriedem 20190503

(?)

Work Items

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