A great description of vDNS vLB scale-out use-case - including CDS integration is available in ONAP Read The Docs (Dublin El Alto release!):
https://docsonap.onapreadthedocs.orgio/en/dublinlatest/submodules/integration.git/docs/docs_scaleout.html
Includes:
- Design Time activities
- Run Time activities
- Closed Loop triggering scale-out actions