I think the UI here needs to be rethought, it was copied from the nova command. --image is used to specify a Glance image, --volume should be used to specify a Cinder volume. The mapping is still required, maybe it can be inferred for the boot volume?
I think the UI here needs to be rethought, it was copied from the nova command. --image is used to specify a Glance image, --volume should be used to specify a Cinder volume. The mapping is still required, maybe it can be inferred for the boot volume?