Combining service discovery mechanisms?

[darkl0rd]

On our Swarm services we have a 'blackbox.url' set, which is picked up by the swarm service discovery and fed to blackbox exporter. However, these URL's could be (often are) backed by multiple IP addresses - as far as I know the only way to get out the different IP addresses is by using the DNS SD mechanism? If that's the case, is there a way to feed my "blackbox.url" label, which I retrieve through the Swarm SD into the DNS SD? If not, is there another way to resolve all the backing IP addresses so I can feed them into the Blackbox Exporter?