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Writing on GPUs, LLMs, MLOps, Kubernetes — and mindset · 3517 posts
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The Reconcile Loop in Depth — Idempotency, Error Handling, Queues, and Performance
A deep dissection of the reconcile loop: the request flow (informer to workqueue to reconcile), Result and requeue, idempotency patterns, status and conditions, predicate event filters, rate limiting and concurrency, cac
2026-06-15 · 18 min read #kubernetes#operator#reconcile#controller-runtime#performanceNot Just Go — Building Operators With Kopf, Metacontroller, and Shell Operator
We break the myth that an Operator must be built with Go and kubebuilder. We compare non-Go options with code: Python Kopf, the declarative-hook approach of Metacontroller, and shell-operator and Ansible Operator. We cov
2026-06-15 · 19 min read #kubernetes#operator#kopf#metacontroller#pythonOperator Best Practices and Anti-Patterns
A code-level rundown of what makes a good Operator and the common anti-patterns. From principles like a small API, idempotent reconcile, observability, and safe upgrades, through pitfalls like side-effect spam, status mi
2026-06-15 · 14 min read #kubernetes#operator#best-practices#reconcile#rbacBuilding Your First Operator with Kubebuilder — From Project Creation to Deployment
Build a working Operator end to end with Kubebuilder. Covers prerequisites, the init/create api flow, defining API types, the full reconcile code that manages a Deployment and Service, RBAC markers, CRD generation, local
2026-06-15 · 10 min read #kubernetes#kubebuilder#operator#controller-runtime#goSleep Is Medicine — Sleep Hygiene, Caffeine, Screens, and Circadian Rhythm
This guide lays out the recommended sleep duration for adults and the basic principles of sleep hygiene, then covers caffeine half-life and cutoffs, the debate over evening screen use, and the role of circadian rhythm an
2026-06-15 · 20 min read #sleep#sleep-hygiene#circadian-rhythm#caffeine#shift-workDigital Eye Health — Computer Vision Syndrome and the 20-20-20 Rule
A digital eye health guide for people who look at screens all day. It covers what computer vision syndrome is and its symptoms, the 20-20-20 rule, the debates over monitor brightness, font size, and blue light, handling
2026-06-15 · 18 min read #eye-health#digital-eye-strain#office-health#computer-vision-syndrome#screen-timeBuilding Healthy Habits — Behavior Design to Beat the Three-Day Quit
A practical guide to sustaining healthy habits by designing your cues and environment instead of relying on willpower. It walks from how habits work through an 8-week roadmap and applied cases for desk-bound office worke
2026-06-15 · 19 min read #habits#health#behavior-change#productivity#wellbeingStress and Burnout Management for Knowledge Workers — Working Sustainably
This guide covers the basics of the stress response and the three components of burnout, then walks through recovery activities, boundary setting, and managing digital overload. From a stance that does not blame burnout
2026-06-15 · 18 min read #burnout#stress-management#mental-health#knowledge-worker#wellbeingBodyweight Home Training — A Beginner Guide to Starting Without Equipment
A beginner-friendly guide to bodyweight training you can start at home without any equipment. It covers the benefits and limits of bodyweight work, safety prep, core movements, a four-week progression, and the role of re
2026-06-15 · 17 min read #fitness#home-workout#bodyweight#beginner#healthA Nutrition Guide for Desk Workers — Practical Lessons from the 2025-2030 Dietary Guidelines
Drawing on the U.S. 2025-2030 Dietary Guidelines released in January 2026, this guide lays out meal patterns and snack alternatives that desk workers can actually use. It covers smoothing out blood-sugar spikes, managing
2026-06-15 · 20 min read #nutrition#office-health#dietary-guidelines#blood-sugar#desk-workerPutting the WHO Physical Activity Guidelines into Practice — Designing 150 Minutes a Week for Busy Professionals
A practical playbook for applying the WHO physical activity recommendations to a busy professional life. It walks through designing 150 minutes a week, distinguishing intensities, weekly workout plan tables, strength tra
2026-06-15 · 21 min read #health#fitness#productivity#habits#wellbeingOffice Stretching and Movement Routine — Five Minutes at Your Desk Changes the Day
A region-by-region stretching and movement routine for a body that stiffens at a desk. It covers steps for neck, shoulder, back, wrist, hip, and hamstring stretches, micro-breaks you can do at your seat, a daily routine
2026-06-15 · 16 min read #stretching#office-health#mobility#micro-break#physical-activityThe Complete Posture and Ergonomics Guide for Desk Workers
A practical guide for office workers who spend eight or more hours a day at a desk. It covers the health risks of sedentary behavior, neutral-posture setup for monitor, chair, keyboard, and mouse, how to use a standing d
2026-06-15 · 18 min read #ergonomics#posture#office-health#desk-setup#sedentarySQLite Is Everywhere (and It's Amazing)
The most-deployed database on Earth is not Oracle or Postgres — it is SQLite. It is in your phone, your browser, even on airplanes. A tour of its serverless single-file design, when it beats a client-server database, WAL
2026-06-15 · 11 min read #databases#sqlite#engineeringTraefik vs ingress-nginx — What to Choose and When
A deep comparison of the two leading Kubernetes ingress controllers, Traefik and ingress-nginx, across design philosophy, configuration style, automatic TLS, performance, observability, and ecosystem. It reflects the 202
2026-06-14 · 20 min read #traefik#ingress-nginx#kubernetes#networking#devopsMigrating Between Ingress Controllers — A Zero-Downtime Strategy
When replacing an Ingress Controller due to ingress-nginx maintenance issues and more, this guide covers building an inventory, mapping annotations, coexisting via IngressClass separation, weighted DNS cutover, and stage
2026-06-14 · 9 min read #ingress#kubernetes#nginx#networking#devopsIngressClass Deep Dive — Running Multiple Ingress Controllers in One Cluster
Starts from the IngressClass resource and the default-class concept, then covers multi-controller scenarios like internal/external, per-team, and migration. Explains the difference between the annotation and spec.ingress
2026-06-14 · 8 min read #ingress#ingressclass#kubernetes#networking#devopsIngress Troubleshooting Playbook — From 502/504/404 to TLS
A practical playbook organizing the common Ingress symptoms (404, 502, 503, 504, TLS errors, redirect loops, 413) into symptom-based diagnostic trees. Each symptom comes with kubectl/curl/log inspection commands and fixe
2026-06-14 · 11 min read #ingress#kubernetes#nginx#troubleshooting#networkingIngress Rate Limiting and DDoS Mitigation: A Practical Guide from ingress-nginx to Gateway API
A practical guide to configuring rate limiting at the Kubernetes Ingress layer and mitigating DDoS. It covers ingress-nginx annotations, a Traefik/Kong/APISIX comparison, the distributed counting problem, separating L3/L
2026-06-14 · 18 min read #ingress#rate-limiting#ddos#networking#kubernetesingress-nginx Production Tuning — Performance, Timeouts, Connections, keepalive
A practitioner tuning guide for running ingress-nginx reliably in production: workers and connections, upstream keepalive, the three timeouts, buffering, compression, rate limiting, HPA scaling, graceful reload, and a 50
2026-06-14 · 14 min read #ingress#kubernetes#nginx#performance#devops