InfoQ - Architecture - Articles https://www.infoq.com InfoQ Architecture Articles feed Article: High Availability is Not Resilience: Why Cloud Systems Fail When it Matters Most https://www.infoq.com/articles/high-availability-not-resilience-cloud/?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=Architecture-articles <img src="https://res.infoq.com/articles/high-availability-not-resilience-cloud/en/headerimage/high-availability-not-resilience-cloud-header-1790670587417.jpg"/><p>A routine TLS 1.3 upgrade silently broke Route 53 health checks, causing a CDN to stop routing traffic to a healthy region while internal dashboards showed nothing wrong. This article examines why HA and resilience are different problems, how control-plane dependencies create invisible failure modes, and why recovery capability erodes without explicit ownership.</p> <i>By Alexey Golev</i> Cloud Availability Resilience Architecture Site Reliability Engineering DevOps Architecture & Design Development article Thu, 01 Oct 2026 09:00:00 GMT https://www.infoq.com/articles/high-availability-not-resilience-cloud/?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=Architecture-articles Alexey Golev 2026-10-01T09:00:00Z /articles/high-availability-not-resilience-cloud/en