---
features:
  - >
   [`blueprint configurable-boot-sources <https://blueprints.launchpad.net/horizon/+spec/configurable-boot-sources>`_]
   Allows administrators to restrict which sources are available to boot from in the
   Launch Instance modal by adding 4 new settings to
   LAUNCH_INSTANCE_DEFAULTS (disable_image, disable_instance_snapshot, disable_volume,
   disable_volume_snapshot).