[cxmcc]

what you need is probably something like https://github.com/adhocteam/ec2ssh (I never used it, but I have built similar ones) -- and then you tag the log entries with instance id.

so you can do "ec2ssh i-0017c8b3"

imho: Hacking around debugging tools is better (mostly because more reliable) than hacking around production configurations (one problem you will see is that changing route53 records frequently will be subject to API rate-limits).