Placement update 19-14 is here. There will be no 15, 16 or 17 due to various bits of travel. There will be some PTG-related summaries.

Most Important

The Virtual Pre-PTG is in full swing and making some good progress towards making sure that we only hit the hard stuff at the in-person PTG. Apologies if it has been a bit overwhelming. The hope is that by paying the price of a bit more whelm now we will have less whelm at the PTG. If you have questions, please ask.

Links to all the threads are in the PTG etherpads:

• https://etherpad.openstack.org/p/placement-ptg-train
• https://etherpad.openstack.org/p/ptg-train-xproj-nova-placement

There's also a retrospective etherpad.

What's Changed

• The 0.12.0 release of os-traits is pending. It switches that package to using the independent release policy. os-resource-classes will get the same treatment when we next need to release it.

Specs/Features

There are four specs in flight in the placement repo and one pending to be ported over from nova:

• https://review.openstack.org/649992 support any trait in allocation candidates

• https://review.openstack.org/649368 support mixing required traits with any traits

• https://review.openstack.org/650476 Allocation Candidates: Subtree Affinity. There's discussion related to this happening in email as part of the pre-PTG.

• https://review.openstack.org/651113 Support filtering by multiple trees.

• https://review.openstack.org/597601 Request group mapping spec is still in Nova, but discussion is happening in email generating a plan for how to proceed.

There are also several nova-specs that were visited in the nova spec review day earlier this week. Some are listed below.

Bugs

• StoryBoard stories in the placement group: 15. Up by 9. 0 are untagged. Part of the reason for the increase is because Matt did the fine work of moving osc-placement bugs over from launchpad.

• Placement related bugs not yet in progress on launchpad: 13. No change.

• In progress placement bugs on launchpad: 4. -1. Those that remain are placement-related, but in nova.

osc-placement

osc-placement is currently behind by 13^w11 microversions. -1 since last week. Support for 1.19 has just merged. Oh wait, no, -3. 1.21 has just merged. There was nothing to do for 1.20.

Pending changes:

• https://review.openstack.org/#/c/640898/ Add 'resource provider inventory update' command (that helps with aggregate allocation ratios).

• https://review.openstack.org/#/c/651783/ Add support for 1.22 microversion

• https://review.openstack.org/586056 Provide a useful message in the case of 500-error

• https://review.openstack.org/650257 Remove unused cruft from doc and releasenotes config

• https://review.openstack.org/652100 Improve aggregate version check error messages with min_version

• https://review.openstack.org/651939 Use PlacementFixture in functional tests. Result of discussion in email in the pre-PTG

Main Themes

More work remains in the pre-PTG discussions to try to drive towards some themes. The specs above capture some of it, but it appears like a lot of the work will be a) supporting other projects doing things with Placement, b) fixing bugs they discover.

Other Placement

Mostly specs in progress (listed above) for now.

• https://review.openstack.org/#/c/645255/ This is a start at unit tests for the PlacementFixture. It is proving a bit "fun" to get right, as there are many layers involved. Making sure seemingly unrelated changes in placement don't break the nova gate is important. Besides these unit tests, there's discussion on the PTG etherpad of running the nova functional tests, or a subset thereof, in placement's check run.

  On the one hand this is a pain and messy, but on the other consider what we're enabling: Functional tests that use the real functionality of an external service (real data, real web requests), not stubs or fakes.

  There's a pre-PTG thread for this.

• https://review.openstack.org/641404 Use code role in api-ref titles

• https://review.openstack.org/#/q/topic:refactor-classmethod-diaf A sequence of refactorings, based off discussion in yet another pre-PTG thread.

Other Service Users

New discoveries are added to the end. Merged stuff is removed.

• https://review.openstack.org/552924 Nova: Spec: Proposes NUMA topology with RPs

• https://review.openstack.org/622893 Nova: Spec: Virtual persistent memory libvirt driver implementation

• https://review.openstack.org/641899 Nova: Check compute_node existence in when nova-compute reports info to placement

• https://review.openstack.org/601596 Nova: spec: support virtual persistent memory

• https://review.openstack.org/#/q/topic:bug/1790204 Workaround doubling allocations on resize

• https://review.openstack.org/555081 Nova: Spec: Standardize CPU resource tracking

• https://review.openstack.org/645316 Nova: Pre-filter hosts based on multiattach volume support

• https://review.openstack.org/606199 Ironic: A fresh way of looking at step retrieval

• https://review.openstack.org/647396 Nova: Add flavor to requested_resources in RequestSpec

• https://review.openstack.org/633204 Blazar: Retry on inventory update conflict

• https://review.openstack.org/640080 Nova: Use aggregate_add_host in nova-manage

• https://review.openstack.org/#/q/topic:bp/count-quota-usage-from-placement Nova: count quota usage from placement

• https://review.openstack.org/#/q/topic:bug/1819923 Nova: nova-manage: heal port allocations

• https://review.openstack.org/624335 puppet-tripleo: Initial extraction of the Placement service from Nova

• https://review.openstack.org/648665 Nova: Spec for a new nova virt driver to manage an RSD

• https://review.openstack.org/#/c/642067/ Helm: Allow more generic overrides for nova placement-api

• https://review.openstack.org/609960 Support filtering of allocation_candidates by forbidden aggregates

• https://review.openstack.org/625284 Cyborg: Initial readme for nova pilot

• https://review.openstack.org/629142 Tempest: Add QoS policies and minimum bandwidth rule client

• https://review.openstack.org/641994 Nova-spec: Re-approve AMD SEV support for Train

• https://review.openstack.org/648687 Nova-spec: Add PENDING vm state

• https://review.openstack.org/#/q/topic:bug/1777591 Nova: use in_tree in RequestGroup

• https://review.openstack.org/650856 kolla-ansible: Remove placement migration code

• https://review.openstack.org/650188 nova-spec: Allow compute nodes to use DISK_GB from shared storage RP

• https://review.openstack.org/651024 nova-spec: RMD Plugin: Energy Efficiency using CPU Core P-State control

• https://review.openstack.org/651455 puppet: Debian: Add support for placement-api over uwsgi

• https://review.openstack.org/650963 nova-spec: Proposes NUMA affinity for vGPUs. This describes a legacy way of doing things because affinity in placement may be a ways off. But it also may not be.

• https://review.openstack.org/649882 nova-spec: Separate the vCPUs into different pools based on priority

• https://review.openstack.org/#/q/topic:heal_allocations_dry_run Nova: heal allocations, --dry-run

• https://review.openstack.org/642527 Neutron: Fullstack test for placement sync

End

There's a lot going on.