alt Hacker NewsBack in the day (10-12 years ago) at a telecom/cable we accomplished this with F5 Big IP GSLB DNS (and later migrated to A10's GSLB equivalent devices) as the auth DNS server for services/zones that required or were suitable for HA. (I can't totally remember but I'm guessing we must have had a pretty low TTL for this).
Had no idea that Route 53 had this sort of functionality
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wparad • today at 8:40 PM
Maybe I should have titled the article "AWS Route53 HealthChecks are amazing" :)
Speaking of F5 Big IP DNS devices, does anyone know of any auth DNS software solution for GSLB/health checking for DNS (I guess excluding Route 53 or other cloud/SaaS). Last I looked all I could find was the polaris-gslb addon for PowerDNS, but the GitHub for that has no activity in 8 years.