chore: improve instance performance (#730)

This change will ensure that the instance disk is provisioned before hand.

Signed-off-by: Kevin Carter <[email protected]>

Author: cloudnull

base-helm-configs/nova/nova-helm-overrides.yaml

@@ -1384,6 +1384,7 @@ conf:
       instance_build_timeout: 900
       block_device_allocate_retries: 180
       block_device_allocate_retries_interval: 5
+      preallocate_images: space
     compute:
       max_disk_devices_to_attach: 8
     vnc: