Linux ops automation, cloud-native, Kubernetes, SRE, DevOps, Python, Golang and related tech discussions.
This guide shows how to dramatically reduce container image size using Docker multi‑stage builds, choose minimal base images, automatically generate SPDX/CycloneDX SBOMs, sign images with Cosign, and integrate the whole process into CI/CD pipelines for secure, lightweight deployments.
This guide walks through the differences between 4‑layer (TCP) and 7‑layer (HTTP) load balancing in Nginx, explains when to use each, and provides step‑by‑step configuration examples, health‑check setups, performance tuning, SSL handling, WebSocket support, and common pitfalls.
This guide explains how to use Prometheus Recording Rules to pre‑compute, aggregate, and smooth metrics in large‑scale microservice environments, cutting daily alert noise by up to 70% through hierarchical alert design, practical examples, and best‑practice recommendations.
This article presents a complete SRE on‑call handbook that defines alert severity levels, provides concrete Prometheus Alertmanager configurations, outlines a step‑by‑step response flow, details war‑room roles, escalation paths, handoff checklists, post‑mortem procedures, and dozens of ready‑to‑use templates to reduce MTTR and improve reliability.
This article walks through a real‑world performance bottleneck on a high‑traffic e‑commerce platform, explains step‑by‑step deep tuning of Nginx Ingress Controller, compares it with Envoy Gateway, and provides concrete configurations, benchmark results, monitoring rules, and best‑practice recommendations for Kubernetes Ingress optimization.
This guide walks you through replacing a heavyweight ELK stack with a minimal Grafana‑Loki logging solution, covering environment requirements, installation of Loki and Promtail, configuration details, best‑practice tips, troubleshooting, and backup strategies for reliable log aggregation.
This guide presents a step‑by‑step, standardized process for detecting, analyzing, and fixing sudden CPU usage spikes on Linux servers, covering preparation, quick identification, deep thread‑level investigation, stack and system‑call analysis, flame‑graph generation, emergency mitigation, and best‑practice recommendations.
This comprehensive guide explains the differences between Nginx 502 and 504 errors, provides step‑by‑step troubleshooting procedures, detailed configuration examples, one‑click diagnostic scripts, real‑world case studies, best‑practice optimizations, monitoring setups, and advanced learning paths to help you quickly resolve gateway issues and improve server reliability.
This article explains the TCP three‑way handshake in depth, covering the state machine, kernel‑level packet analysis, performance tuning, security hardening, real‑world case studies such as SYN‑Flood mitigation and TIME_WAIT overload, and provides complete C and Python examples, monitoring metrics, troubleshooting steps, and backup procedures for production environments.
This guide explains how to dramatically shrink Docker image sizes by up to 70% using multi‑stage builds, Alpine or Distroless bases, layer merging, .dockerignore, and BuildKit, while also integrating Trivy security scanning, non‑root users, SUID removal, and CI/CD automation to ensure a lean, secure container deployment.
