project
AWS DNS service; ACM console can create required CNAME validation records directly in Route 53.
No evidence-backed relationships are recorded.
Disabling TLS 1.2 on public ingress failed Route 53 HTTPS health checks and cut traffic to a healthy region, according to an InfoQ case study. The fault sat in the control plane that decides where traffic goes, where no in-region dashboard could see it.
Reality
A dev.to walkthrough keeps stable internal hostnames in the infrastructure repository, then polls the authoritative answer for up to 60 seconds after each upsert and exits nonzero when the published set differs from the manifest.
Reality
Peering two Regions gets you a writable endpoint on each side and no failover step to run. The commit path pays an inter-Region round trip for it. The latency SLO that survived the migration is what breaks.
Reality
Sam Newman's InfoQ talk uses the 1968 Ronan Point tower failure to argue that a cascade is a property of the structure, not of the trigger that started it.
Reality
ACM stops offering email validation in new Regions on Jan 1 2027, blocks new requests on March 31, and stops renewing on Sept 30. The in-place switch to DNS keeps the certificate ARN.
Reality