nova/releasenotes/notes/image-precaching-d46506568fefa1ea.yaml
Dan Smith 3391298706 Add image caching API for aggregates
This adds a new microversion and support for requesting image pre-caching
on an aggregate.

Related to blueprint image-precache-support

Change-Id: I4ab96095106b38737ed355fcad07e758f8b5a9b0
2019-10-15 21:22:31 -04:00

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YAML

---
features:
- |
Image pre-caching on hosts by aggregate is now supported (where
supported by the underlying virt driver) as of microversion
2.81. A group of hosts within an aggregate can be compelled to
fetch and cache a list of images to reduce time-to-boot
latency. Adds the new API:
* ``POST /os-aggregates/{aggregate_id}/images``
which is controlled by the policy ``compute:aggregates:images`` rule.
See the `[image_cache]/precache_concurrency` config option
for more information about throttling this operation.