qemu-img create -f qcow2 \
-o compat=0.10 /var/lib/libvirt/images/sparse-qcow2.img 1073741824K
qemu-img convert --image-opts -n --target-image-opts \
--object secret,id=encrypt2.img_encrypt0,file=/path/to/inputSecretFile \
driver=luks,file.filename=/var/lib/libvirt/images/encrypt2.img,\
key-secret=encrypt2.img_encrypt0 \
driver=qcow2,file.filename=/var/lib/libvirt/images/sparse-qcow2.img