You are right, DIB is adding considerable extra MBs to the image size under the hood:
https://github.com/openstack/diskimage-builder/blob/a0fd571a3ce4cfcfca69b8f63d9cb9a8725de5b7/diskimage_builder/lib/disk-image-create#L470-L480
Related changes: - https://review.opendev.org/c/openstack/diskimage-builder/+/676354 - https://review.opendev.org/c/openstack/diskimage-builder/+/641702 - https://review.opendev.org/c/openstack/diskimage-builder/+/614526
You are right, DIB is adding considerable extra MBs to the image size under the hood:
https:/ /github. com/openstack/ diskimage- builder/ blob/a0fd571a3c e4cfcfca69b8f63 d9cb9a8725de5b7 /diskimage_ builder/ lib/disk- image-create# L470-L480
Related changes: /review. opendev. org/c/openstack /diskimage- builder/ +/676354 /review. opendev. org/c/openstack /diskimage- builder/ +/641702 /review. opendev. org/c/openstack /diskimage- builder/ +/614526
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