Image storage back end¶

Parameter	`features:nova:images:backend`
Usage	Defines the type of storage for Nova to use on the compute hosts for the images that back up the instances. The list of supported options include: `local` The local storage is used. The pros include faster operation, failure domain independency from the external storage. The cons include local space consumption and less performant and robust live migration with block migration. `ceph` Instance images are stored in a Ceph pool shared across all Nova hypervisors. The pros include faster image start, faster and more robust live migration. The cons include considerably slower IO performance, workload operations direct dependency on Ceph cluster availability and performance. `lvm` ^TechPreview Instance images and ephemeral images are stored on a local Logical Volume. If specified, `features:nova:images:lvm:volume_group` must be set to an available LVM Volume Group, by default, `nova-vol`. For details, see Enable LVM ephemeral storage.

Parameter

features:nova:images:backend

Usage

Defines the type of storage for Nova to use on the compute hosts for the images that back up the instances.

The list of supported options include:

local
The local storage is used. The pros include faster operation, failure domain independency from the external storage. The cons include local space consumption and less performant and robust live migration with block migration.
ceph
Instance images are stored in a Ceph pool shared across all Nova hypervisors. The pros include faster image start, faster and more robust live migration. The cons include considerably slower IO performance, workload operations direct dependency on Ceph cluster availability and performance.
lvm ^TechPreview
Instance images and ephemeral images are stored on a local Logical Volume. If specified, features:nova:images:lvm:volume_group must be set to an available LVM Volume Group, by default, nova-vol. For details, see Enable LVM ephemeral storage.