Failover Weekly · cloudpunk.blogEssays on cloud resilience and networking, and on what really happens when the primary fails. One essay every two weeks, plus a short note when a new article is published here.https://cloudpunk.blog/Warm Is a Resourcehttps://cloudpunk.blog/newsletter/warm-is-a-resource/https://cloudpunk.blog/newsletter/warm-is-a-resource/Why the Fleet That Recovered Still Cannot Carry Your TrafficFri, 30 Oct 2026 00:00:00 GMTMostly One Leaderhttps://cloudpunk.blog/newsletter/mostly-one-leader/https://cloudpunk.blog/newsletter/mostly-one-leader/Why a Lease That Expired Is Not a Worker That StoppedThu, 15 Oct 2026 00:00:00 GMTYour request needs a deadlinehttps://cloudpunk.blog/newsletter/your-request-needs-a-deadline/https://cloudpunk.blog/newsletter/your-request-needs-a-deadline/Last week I argued that a dead-letter queue is a decision deferred, and that every mechanism which defers work owes you three things: a clock, an owner and a rate.Wed, 23 Sep 2026 00:00:00 GMTExactly-Once Has Boundarieshttps://cloudpunk.blog/newsletter/exactly-once-has-boundaries/https://cloudpunk.blog/newsletter/exactly-once-has-boundaries/Why Your Idempotency Key May Expire Before Your Replay ArrivesThu, 10 Sep 2026 00:00:00 GMTRetries are Multipliershttps://cloudpunk.blog/newsletter/retries-are-multipliers/https://cloudpunk.blog/newsletter/retries-are-multipliers/Weeks ago I argued the safest fallback is often none at all.Wed, 02 Sep 2026 00:00:00 GMTYour Health Check Is a Trigger, Not a Testhttps://cloudpunk.blog/newsletter/your-health-check-is-a-trigger-not-a-test/https://cloudpunk.blog/newsletter/your-health-check-is-a-trigger-not-a-test/Why "Deeper" Quietly Means "Correlated"Wed, 05 Aug 2026 00:00:00 GMTReachability Is Not Readinesshttps://cloudpunk.blog/newsletter/reachability-is-not-readiness/https://cloudpunk.blog/newsletter/reachability-is-not-readiness/What "Global Accelerator in Front of Two Regions" Actually PromisesWed, 29 Jul 2026 00:00:00 GMTWhen Your Load Balancer Stops Trusting Its Own Health Checkshttps://cloudpunk.blog/newsletter/when-your-load-balancer-stops-trusting-its-own-health-checks/https://cloudpunk.blog/newsletter/when-your-load-balancer-stops-trusting-its-own-health-checks/Your load balancer's health checks are not a kill switch for a failing fleet.Tue, 21 Jul 2026 00:00:00 GMTReaped, Not Brokenhttps://cloudpunk.blog/newsletter/reaped-not-broken/https://cloudpunk.blog/newsletter/reaped-not-broken/What Nitro v6 Changed About Idle ConnectionsWed, 15 Jul 2026 00:00:00 GMTI Pointed a Browser at the Internet's Nervous System. Here's What It Taught Me About Signal and Noise.https://cloudpunk.blog/newsletter/i-pointed-a-browser-at-the-internets-nervous-system/https://cloudpunk.blog/newsletter/i-pointed-a-browser-at-the-internets-nervous-system/How a single HTML file, one WebSocket, and the RIPE routing feed became a live Internet resilience dashboard — and why the hard part was never the data.Tue, 07 Jul 2026 00:00:00 GMTHigh vs Maximum Resilience on Direct Connecthttps://cloudpunk.blog/newsletter/high-vs-maximum-resilience-on-direct-connect/https://cloudpunk.blog/newsletter/high-vs-maximum-resilience-on-direct-connect/Picking the right SLAWed, 01 Jul 2026 00:00:00 GMTMulti-signer DNSSEC without losing your weekendhttps://cloudpunk.blog/newsletter/multi-signer-dnssec-without-losing-your-weekend/https://cloudpunk.blog/newsletter/multi-signer-dnssec-without-losing-your-weekend/I have spent more late nights than I would like cleaning up after Domain Name System Security Extensions (DNSSEC) misadventures, and the shape of the failure is almost always the same.Tue, 23 Jun 2026 00:00:00 GMTDNS as your steering layerhttps://cloudpunk.blog/newsletter/dns-as-your-steering-layer/https://cloudpunk.blog/newsletter/dns-as-your-steering-layer/Anycast, latency, and EDNS0 realityWed, 17 Jun 2026 00:00:00 GMTAmazon Application Recovery Controller in practicehttps://cloudpunk.blog/newsletter/amazon-application-recovery-controller-in-practice/https://cloudpunk.blog/newsletter/amazon-application-recovery-controller-in-practice/Readiness checks, routing controls, zonal autoshiftWed, 10 Jun 2026 00:00:00 GMTThree Cats, Zero Downtimehttps://cloudpunk.blog/newsletter/three-cats-zero-downtime/https://cloudpunk.blog/newsletter/three-cats-zero-downtime/What my household cluster taught me about high availabilityFri, 05 Jun 2026 00:00:00 GMTThe book is here.https://cloudpunk.blog/newsletter/the-book-is-here/https://cloudpunk.blog/newsletter/the-book-is-here/Two years, 740 pages, and the small Bengal cat who taught me what resilience really means... in life...Wed, 27 May 2026 00:00:00 GMTLies Cloud Architects Tell Themselves at 2 AM...https://cloudpunk.blog/newsletter/lies-cloud-architects-tell-themselves-at-2-am/https://cloudpunk.blog/newsletter/lies-cloud-architects-tell-themselves-at-2-am/Every cloud architect has a moment — usually at 2 AM during an incident — where they stare at a dashboard and realize that something they swore was resilient absolutely is not.Thu, 14 May 2026 00:00:00 GMT386 Outages in One Weekhttps://cloudpunk.blog/newsletter/386-outages-in-one-week/https://cloudpunk.blog/newsletter/386-outages-in-one-week/The Network You Do Not Own Can Still Fail Your WorkloadThu, 07 May 2026 00:00:00 GMTWhen BGP, Firmware, and Failover Collidehttps://cloudpunk.blog/newsletter/when-bgp-firmware-and-failover-collide/https://cloudpunk.blog/newsletter/when-bgp-firmware-and-failover-collide/What Recent Cloud Incidents Teach Us About ResilienceThu, 30 Apr 2026 00:00:00 GMTCLOUD RESILIENCE INSIDERhttps://cloudpunk.blog/newsletter/cloud-resilience-insider/https://cloudpunk.blog/newsletter/cloud-resilience-insider/We interrupt your regularly scheduled deep-dive on cell-based architectures to bring you something the cloud industry desperately needs: honesty.Mon, 27 Apr 2026 00:00:00 GMTResilience Migration Advisorhttps://cloudpunk.blog/newsletter/resilience-migration-advisor/https://cloudpunk.blog/newsletter/resilience-migration-advisor/A Zero-Backend Tool for DR Planning That Keeps Control in the Customer’s HandsThu, 16 Apr 2026 00:00:00 GMTHow a Central US Admin-Plane Dependency Exposed a Wider Control-Surface Riskhttps://cloudpunk.blog/newsletter/how-a-central-us-admin-plane-dependency-exposed-a-wider-control-surface-risk/https://cloudpunk.blog/newsletter/how-a-central-us-admin-plane-dependency-exposed-a-wider-control-surface-risk/A short incident. A narrow fault domain.Fri, 10 Apr 2026 00:00:00 GMTWhen Drones Hit Your Availability Zoneshttps://cloudpunk.blog/newsletter/when-drones-hit-your-availability-zones/https://cloudpunk.blog/newsletter/when-drones-hit-your-availability-zones/Why the Threat Model Just ChangedThu, 02 Apr 2026 00:00:00 GMTWhen the Network Breakshttps://cloudpunk.blog/newsletter/when-the-network-breaks/https://cloudpunk.blog/newsletter/when-the-network-breaks/What Three Major Outages Taught Us About Resilient ArchitectureTue, 24 Mar 2026 00:00:00 GMTYour Multi-AZ Architecture Probably Has a Single Point of Failurehttps://cloudpunk.blog/newsletter/your-multi-az-architecture-probably-has-a-single-point-of-failure/https://cloudpunk.blog/newsletter/your-multi-az-architecture-probably-has-a-single-point-of-failure/Health checks are green. Dashboards look normal.Wed, 18 Mar 2026 00:00:00 GMT