Your JavaScript Code is Killing Your Infrastructure (And You’re Probably Fine With It) It was 3:14 AM on a Tuesday in 2019. I was the on-call SRE for a fintech startup that processed payments via api.stripe.com. Suddenly, PagerDuty started screaming. Our main API gateway—a Node.js service—was hitting 95% memory utilization across 40 pods. Then the … Read more
AWS is Just Someone Else’s Data Center (And Why You’re Paying Too Much for It) It was 3:14 AM on a Tuesday when my PagerDuty went off. The alert was a generic TargetResponseTime high on our main production ALB. I logged in, eyes blurry, and saw that our NAT Gateway was processing 4.5 Gbps of … Read more
The smell of ozone and stale coffee is the only thing that stays the same. It was 03:14 AM on a Tuesday in 2014. I was standing in a data center in Secaucus, the floor tiles vibrating under my boots from the sheer CFM of the cooling fans. We had a cluster of HP ProLiant … Read more
text $ node -v v14.17.0 (Warning: Node.js version is end-of-life. Security patches are non-existent.) $ npm audit ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Scanning 2,482 dependencies for vulnerabilities… Critical: 14 High: 89 Moderate: 156 Low: 412 Run npm audit fix to do absolutely nothing because the dependency tree is a circular nightmare of peer-dependency conflicts. $ vite build vite v2.9.15 … Read more
The pager didn’t just beep. It screamed. It’s a specific frequency—somewhere between a dying hawk and a car alarm—that PagerDuty reserves for the kind of “Priority 0” events that end careers. I swiped the screen with a thumb that was shaking more from a lack of sleep than from fear. 03:14:22 UTC. Error Code: AADSTS7000222 … Read more
Listen, kid. Sit down. Stop clicking that mechanical keyboard for a second and look at me. You’ve got that look in your eyes—the one where you think you’ve stumbled upon the Promethean fire of infrastructure. You just asked me, with a straight face and a heart full of hope, what is Kubernetes? You think it’s … Read more
It’s 03:14 AM. The pager is screaming, and the cluster is a graveyard of CrashLoopBackOffs. Here is exactly how we got here and why your “standard” setup is a liability. I’m staring at a terminal window that looks like a crime scene. The junior dev—let’s call him Dave, because it’s always a Dave—pushed a “minor” … Read more
POST-MORTEM REPORT: INCIDENT #4092 – GATEWAY OOM COLLAPSE DATE: 2024-10-24 PREPARED BY: Senior Systems Engineer (Embedded/Firmware Dept.) SUBJECT: THE CATASTROPHIC FAILURE OF ABSTRACTION: WHY THE PYTHON LIST IS NOT AN ARRAY 0. THE SMOKING GUN: TERMINAL LOGS I was woken up at 03:15 by the pager because the production gateway—a machine with 16GB of ECC … Read more
I’m writing this from the floor of the cold aisle in Data Center 4. The 3 AM cron job just triggered a cascade failure because someone decided to ‘innovate’ with a non-deterministic API call. [ 136829.402183] out_of_memory: Kill process 14022 (python3) score 942 or sacrifice child [ 136829.402195] Killed process 14022 (python3) total-vm:128402176kB, anon-rss:124021760kB, file-rss:0kB, … Read more
text stderr: 2024-05-14T03:14:02.882Z ERROR [service-api-gateway] [go-routine-442] connection reset by peer: context deadline exceeded (client_timeout=5000ms) stderr: 2024-05-14T03:14:02.883Z FATAL [service-api-gateway] [main] failed to initialize upstream circuit breaker: redis connection refused at 10.96.0.15:6379 stderr: 2024-05-14T03:14:03.101Z INFO [kernel] [oom-killer] invoked: oom_score_adj=999, total_vm=18446744, anon_rss=16223412, file_rss=0, shmem_rss=0 $ kubectl get pods -n production -l app=order-processor NAME READY STATUS RESTARTS AGE order-processor-7f8d9b6c5d-2v8xl … Read more