Get the interface IP on the actual Interfaces datasource?

Hm, appears to not yet be released. It's been in the works for a while since it's the most heavily utilized datasource since it works for pretty much all device types. You could either give it time, or write your own.  I attempted something like this with this: https://github.com/sweenig/monitoring-recipes/blob/master/DataSources/Groovy/SNMP/Examples/ActiveDiscovery_with_properties_with_enumeration.groovy, but it's not scalable to very large devices. After about 200 interfaces it starts to timeout pretty bad.