LOL who posted the "it's always DNS" meme earlier this week?
BleepingComputer: Amazon: This week’s AWS outage caused by major DNS failure
"...According to a post-mortem published on Thursday, a race condition caused a major DNS failure in Amazon DynamoDB's infrastructure, specifically within its DNS management system that controls how user requests are routed to healthy servers, which led to the accidental deletion of all IP addresses for the database service's regional endpoint...."