Comment 1 for bug 1869903

Bug hygiene:

Triage:

Adding the following to the template and any other requirements per the doc [0]

[ceph]
image_volume_cache_enabled

1) Add a config option to turn on the cache which should default to off
2) Update pertinent templates i.e. parts/backends
3) * Potentially add config options or calculations for image_volume_cache_max_size_gb and image_volume_cache_max_count.

* Keep in mind cinder instances are most often in a LXD container and may not have an infinite amount of disk space.

This would make an excellent on-boarder task.

[0] https://docs.openstack.org/cinder/latest/admin/blockstorage-image-volume-cache.html