Why does a forty-year-old protocol keep taking down billion-dollar infrastructure? The October 2025 AWS outage lasted fifteen hours because of a DNS race condition. Kubernetes defaults create 5x query amplification. We investigate how DNS really works in modern platforms—CoreDNS plugin chains, the ndots:5 trap, GSLB failover—and deliver the five-layer defensive playbook to prevent your platform from becoming the next postmortem.
🔗 Full episode page: https://platformengineeringplaybook.com/podcasts/00023-dns-platform-engineering
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