The agent wrote a health check that passed while the database was on fire
We were on call when the primary started rejecting connections. Dashboards lit up, the runbook said to drain the failing pods, and the Kubernetes li…
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Google Cloud outage in London: what one zone's power event broke
On Tuesday morning a Google Cloud outage hit London. A power event took out one zone of the europe-west2 region, europe-west2-b , and for a few hour…
When the status page is green but users can't log in: notes from today's Revolut outage
Revolut confirmed a service interruption today that left users in several European countries, including Spain, the UK and France, unable to use the…
Your Escalation Ladder Belongs in a Table, Not in Prose
Your escalation ladder should be a decision table that a test suite can replay, not four paragraphs a tired engineer has to interpret at 03:00. That…
Log-Based Search vs Cheap API Failure Alerts: Choose Counters for Stable Cohorts
TL;DR: For failure alerts on a logistics experiment, I would choose request-path counters over repeated log searches when every request already has…
Error Tracking and Uptime Monitoring Expose Different Cron Heartbeat Evidence
Error tracking and uptime monitoring cannot prove that a media cron job sent its completion heartbeat. An AI agent that never starts produces no exc…
Marketplace Alerts: 5 Transactional Email and SMTP Signals for 2FA Codes
Short answer: yes, an email API can replace the SMTP login used by your application for 2FA codes and generated marketplace reports. It does not rep…
Daily Dose of DevOps — SLI definition: without alert fatigue
SLI definition: without alert fatigue A platform capability becomes dangerous when ownership is implicit but authority is broad. For sli definition…
Transactional Email and SMS API: 5 SaaS Event Notification Evidence Tests
The transactional email and SMS API event notification page says dispatch_evidence_budget_exhausting . On-call sees 43 generated customs reports who…
Daily Dose of DevOps — Kubernetes observability: for regulated workloads
Kubernetes observability: for regulated workloads Scale converts an informal convention into an outage mechanism. For kubernetes observability for r…
AIOps: наш опыт внедрения HolmesGPT на трёх проектах
Мы внедрили HolmesGPT — open-source SRE-агента — в шести Kubernetes-кластерах на трёх проектах. Теперь через несколько минут после алерта рядом с ни…
Kubernetes readiness gates and rolling deploys without downtime
You ship a new version on a quiet Tuesday afternoon. kubectl rollout status reports success, every pod is Running and Ready, and the dashboards look…
Бюджет 999: как в Авито считают надёжность и почему не копируют модель Google
Привет, Хабр! Меня зовут Иван Тарасов , я TUL Architecture Governance в техплатформе Авито . Одна из моих команд — SLA — создаёт условия для повышен…
Marketplace Health Endpoint Monitoring — 2 Small SaaS Observability Stack Boundaries
TL;DR: A small marketplace needs two evidence paths: internal telemetry that explains a failed scheduled job, and an external check that notices pub…
Kitchen Order Status Board: 4 Realtime API Signals (Scoped Kiosk Tokens)
The page says receipt_confirmation_gap is burning its error budget. On-call sees a hospital kitchen order marked ready in the system but missing fro…
Auditable Monthly Report Archiving with PDF Text Extraction and OCR Verification
Short answer: extract embedded PDF text first, but make the decision per page rather than per file; send only pages that fail structural and content…
Marketplace 2FA: Polling SMS OTP Delivery Status Without Webhooks
The operational constraint is that delivery events are pull-based, so a marketplace login cannot wait for a webhook that will never arrive. Short an…
A Guide to Choose Healthchecks and App Metrics for Missed Cron Jobs
A scheduled task has one operational constraint that changes the tooling choice: when it never starts, it cannot emit its own failure metric. TL;DR:…
SaaS Signup SMS Alerts API: Node.js Delivery Polling and Templates
Use an application-owned verification template and an SMS alerts API with queryable delivery state for a basic US/EU SaaS signup flow, including whe…
Runbooks the On-Call Engineer Will Actually Open at 3am
Cross-posted from the Fluidify blog . Key takeaways Most runbooks are written by someone calm, at a desk, with full context, for a reader who is non…
SMS OTP vs Email OTP: Shift-Deadline Security for HR SaaS Login
TL;DR: For an HR SaaS 2FA login or password-reset flow near a shift boundary, choose SMS OTP or email OTP at runtime according to the employee's ver…
DRP, который никто не проверял: почему план восстановления может не сработать в самый нужный момент
Привет, Хабр! Меня зовут Илья. Долгое время я работал в финтехах и у облачного провайдера. Занимался сопровождением информационных систем, причём не…
How Over‑Optimized Prompt Caching Kills Real‑World LLM Application Performance
Prompt caching sounds like an obvious win on paper. Every AI engineer learns it as a best practice: cache repeated system prompts, store frequently…
How to Use Email API Events for Bounce Monitoring (Template-Owned Support)
TL;DR: For a marketplace contact form, choose an email API that can return durable bounce, complaint, suppression, and domain-health signals without…
Node.js SMS Alerts API: How SaaS Apps Audit E-commerce Status Without Webhooks
Compliance evidence changes the SMS API decision: choose the provider and architecture that let you prove what your e-commerce signup system request…
Where the four minutes go when a cluster adds a node
Autoscaling is usually described as a property a cluster either has or does not have. You add a HorizontalPodAutoscaler, you tick the box for node a…
Governing Next.js Phone Verification Login SMS OTP Resends in Production
TL;DR: In a Next.js phone verification login, treat the SMS OTP resend countdown as a backend admission-control decision, not a browser timer. For m…
Product Event Notifications: How to Compare Postmark, Resend, SendGrid, SES, and SMS
TL;DR: Keep the password-reset policy and template contract in your application, then let a provider render or deliver only what that contract permi…
Математика катастрофы: от дифференциальных уравнений до очередей G/G/1 и формулы Кингмана
Знакомая картина: в 3 часа ночи падает база данных, Alertmanager засыпает каналами, через 5 минут сеть восстанавливается, но… система остаётся…
Two-Factor Authentication: How to Observe SMS and Trigger Backup Email
The page says that a marketplace seller cannot open a new property order because the login code never arrived. Support sees an impatient seller. On-…