03:14:02 UTC – The PagerScreams. 03:14:15 UTC – Primary load balancer (Nginx 1.25.2) reports 100% 502 Bad Gateway. 03:14:40 UTC – SSH attempt to prod-app-01 times out. 03:15:10 UTC – Internal Slack channel #ops-fire-drill explodes. 03:16:00 UTC – I realize my third cup of coffee is cold, and my life is a lie. I’m sitting … Read more
[2023-10-14 03:14:22.891] ERROR: torch.cuda.OutOfMemoryError: CUDA out of memory. Tried to allocate 14.50 GiB (GPU 0; 15.78 GiB total capacity; 11.20 GiB already allocated; 2.45 GiB free; 12.10 GiB reserved in total by PyTorch) If reserved memory is >> allocated memory try setting max_split_size_mb to avoid fragmentation. See documentation for Memory Management and PYTORCH_CUDA_ALLOC_CONF [2023-10-14 03:14:22.892] … Read more
// This is the specific block of “clever” garbage that took down the // payment gateway at 3:00 AM on a Sunday. // Node v20.11.1 – Production Environment var requestCache = {}; // Global scope leak app.use((req, res, next) => { var correlationId = req.headers[‘x-correlation-id’] || Math.random().toString(); // "Clever" optimization to avoid DB lookups if … Read more
TIMESTAMP: 2024-10-14T04:12:09.442Z INCIDENT ID: SEV-1-8829-BRAVO-KILO STATUS: RESOLVED (MITIGATED BY HARD SHUTDOWN) SYSTEM: CORE-PROVISIONING-ENGINE-V4 ALERT: [CRITICAL] High Error Rate (98.4%) on /v1/billing/reconcile – Pods entering CrashLoopBackOff. 1. The Initial Breach of Logic: When “Probabilistic” Met “Production” At 04:12 UTC, the primary PagerDuty rotation received a flood of alerts indicating that the billing-reconciler-service was failing health checks … Read more
INTERNAL INCIDENT REPORT: RCA-2023-11-14-GEN-AI-COLLAPSE TO: Engineering Department, CTO, Product Management (Read it and weep) FROM: Senior SRE (Incident Lead) STATUS: CRITICAL / POST-MORTEM SUBJECT: Mandatory “Artificial Intelligence” Implementation Standards following the 48-hour Cluster Death Spiral. I have spent the last 48 hours staring at Grafana dashboards that looked like a heart monitor flatlining. I haven’t … Read more
Your Security Checklist is a Liability: Real-World Cybersecurity Best Practices for the Cynical SRE I once took down an entire payment gateway because I thought I was being clever with secret rotation. It was 3:00 AM. I had scripted a rolling update for our production Vault cluster, but I forgot to account for the token … Read more
JavaScript Best Practices: Why Your “Clean Code” is Crashing My Production Nodes It was 3:14 AM on a Tuesday in 2019. I was on-call for a payment processing gateway. Our Node.js worker fleet started dropping like flies. The error? ERR_S3_UPLOAD_FAILED followed immediately by an OOM-killed signal from the Kubelet. I spent four hours digging through … Read more
The AWS bill arrived at 3:00 AM, and it was $14,000 higher than last month. I didn’t even have to look at the logs to know which ‘React Best’ practices you lot ignored this time. I have spent the last 72 hours staring at Chrome DevTools memory profiles and AWS CloudWatch metrics while the rest … Read more
Cybersecurity Best Practices: Why Your SOC is Lying to You and How to Actually Secure a Production Environment I once took down a mid-sized fintech’s entire staging environment because I thought I was being clever with iptables. I was trying to block a suspected brute-force attack on an exposed Redis port—don’t ask why Redis was … Read more
Stop Building Fortresses on Sand: Why Your “Cybersecurity Best” Practices Are Actually Security Theater I once spent 14 straight hours rotating every single Stripe API key, AWS IAM secret, and database credential for a fintech startup because I thought I was being clever with Docker layers. I had a multi-stage build. I thought that by … Read more