placement/releasenotes/notes/nova-manage-placement-sync-aggregates-1e6380eceda7dc9b.yaml
Matt Riedemann 535151f32d Add nova-manage placement sync_aggregates
This adds the "nova-manage placement sync_aggregates"
command which will compare nova host aggregates to
placement resource provider aggregates and add any
missing resource provider aggregates based on the nova
host aggregates.

At this time, it's only additive in that the command
does not remove resource provider aggregates if those
matching nodes are not found in nova host aggregates.
That likely needs to happen in a change that provides
an opt-in option for that behavior since it could be
destructive for externally-managed provider aggregates
for things like ironic nodes or shared storage pools.

Part of blueprint placement-mirror-host-aggregates

Change-Id: Iac67b6bf7e46fbac02b9d3cb59efc3c59b9e56c8
2018-07-24 11:19:23 -04:00

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YAML

---
features:
- |
A ``nova-manage placement sync_aggregates`` command has been added which
can be used to mirror nova host aggregates to resource provider aggregates
in the placement service. This is a useful tool if you are using aggregates
in placement to optimize scheduling:
https://docs.openstack.org/nova/latest/admin/configuration/schedulers.html#aggregates-in-placement
The ``os-aggregates`` compute API ``add_host`` and ``remove_host`` actions
will automatically add/remove compute node resource providers from resource
provider aggregates in the placement service if the ``nova-api`` service
is configured to communicate with the placement service, so this command
is mostly useful for existing deployments with host aggregates which are
not yet mirrored in the placement service.
For more details, see the command documentation:
https://docs.openstack.org/nova/latest/cli/nova-manage.html#placement