Machine Learning: Stop Building Science Projects and Start Shipping Code Three years ago, I got paged at 3:14 AM because our “state-of-the-art” churn prediction model decided that every single customer at a major fintech client was about to quit. The marketing automation engine, doing exactly what it was programmed to do, fired off $50,000 worth … Read more
INCIDENT REPORT #9902-B: THE DEATH OF OUR REGISTRY Date: October 14, 2023 Duration: 48 Hours (and my sanity) Status: Post-Mortem / Educational Intervention Lead SRE: [REDACTED] 1. Summary of the Carnage At 03:14 UTC, the monitoring stack for our production cluster started screaming. Node prod-worker-04, running Docker Engine v25.0.3, reported a total disk exhaustion event … Read more
03:14 AM – The silence was the first sign. The Zabbix alerts didn’t trigger because the monitoring VM was the first to have its vmdk headers shredded. I only noticed because the hum of the drive arrays in Rack 4 changed pitch—a frantic, high-frequency seeking sound that tells you the heads are working overtime to … Read more
03:14 AM – The silence was the first sign. The Zabbix alerts didn’t trigger because the monitoring VM was the first to have its vmdk headers shredded. I only noticed because the hum of the drive arrays in Rack 4 changed pitch—a frantic, high-frequency seeking sound that tells you the heads are working overtime to … Read more
POST-INCIDENT AUDIT: REPORT #88-B (CRITICAL SYSTEM COMPROMISE) DATE: 2024-10-14 AUDITOR: Senior Infrastructure Architect (Security/Hardening) SUBJECT: The systematic failure of docker compose deployments in the “Alpha-Omega” staging environment. 1. The Incident Log The following is a raw dump from the host prod-srv-01 during the initial breach detection. The developer responsible claimed the setup was “standard.” I … Read more
…and another thing, Tyler, if I see one more “Cloud-Native Architect” certification on your LinkedIn while you still can’t tell me the difference between a hard link and a symbolic link, I’m going to lose what’s left of my graying hair. You think you’re “orchestrating” something? You’re just piling blankets on a fire and wondering … Read more
INCIDENT REPORT: #882-B-FATAL STATUS: UNRESOLVED (MITIGATED BY HARD REBOOT) AUTHOR: Senior SRE (Employee #402, On-call Rotation 4) SUBJECT: The Total Collapse of the “Smart” Inference Pipeline Traceback (most recent call last): File "/usr/local/lib/python3.11/site-packages/torch/nn/modules/module.py", line 1501, in _call_impl return forward_call(*args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/app/inference/model_wrapper.py", line 84, in forward output = self.backbone(input_ids, attention_mask=mask) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/site-packages/torch/nn/modules/module.py", line … Read more
Stop Searching for “Cybersecurity Near Me” and Start Fixing Your Local Loopback I once took down an entire staging cluster because I thought I was being “secure.” I had just finished a marathon session of hardening our SSH configs and decided to implement a strict IP allowlist on our internal load balancer. I was tired. … Read more
May 22 14:02:11 node-01 sshd[28491]: Invalid user admin from 192.168.1.42 port 54220 May 22 14:02:11 node-01 sshd[28491]: Connection closed by authenticating user admin 192.168.1.42 port 54220 [preauth] May 22 14:02:13 node-01 sshd[28493]: Invalid user support from 192.168.1.42 port 54222 May 22 14:02:13 node-01 sshd[28493]: Connection closed by authenticating user support 192.168.1.42 port 54222 [preauth] May … Read more
[2024-05-14 03:14:22.981] KERNEL: [72104.120934] out_of_memory: Kill process 14029 (python3) score 942 or sacrifice child [2024-05-14 03:14:23.001] CUDA: [ERROR] Failed to allocate 40.2GB on Device 0. Available: 1.2GB. [2024-05-14 03:14:23.005] TRACEBACK: File “/opt/icarus/inference/engine.py”, line 442, in forward: output = self.model(input_tensor) [2024-05-14 03:14:23.009] CRITICAL: Segmentation fault (core dumped). [2024-05-14 03:14:23.012] SYSTEM: Watchdog timer expired. Hard reset initiated. … Read more