Linux ops automation, cloud-native, Kubernetes, SRE, DevOps, Python, Golang and related tech discussions.
This article provides an in‑depth analysis of PostgreSQL's lock system, covering lock types, MVCC interaction, deadlock detection, advisory locks, monitoring scripts, and practical optimization techniques for production environments.
When a Linux disk space alert fires, this guide walks you through three rapid steps—identifying the affected partition, deep‑diving with df, du, ncdu and custom scripts, and cleaning up logs, caches, inodes, LVM, Docker, and quotas—to quickly pinpoint and resolve the root cause.
This guide explains Nginx's multi‑process architecture, shows how to bind worker processes to CPU cores, tune worker connections, configure upstream load‑balancing, enable proxy buffering, keepalive, gzip/Brotli compression, SSL/TLS settings, and provides testing and troubleshooting scripts for high‑performance deployments.
This article provides a detailed comparison of the three leading Kubernetes Ingress Controllers—Nginx, Traefik, and Envoy—covering their architecture, configuration methods, feature sets, performance benchmarks, and practical selection guidance for various deployment scenarios.
This article explains Kubernetes' three‑principle network model, compares the leading CNI plugins (Flannel, Calico, Cilium), details pod communication paths, Service and Ingress mechanisms, DNS and NetworkPolicy implementations, and provides step‑by‑step troubleshooting cases with performance data and concrete configuration examples.
This comprehensive guide walks you through using tcpdump and Wireshark for network fault isolation, covering core concepts, capture filters, detailed analysis techniques, performance tuning, expert information interpretation, automation scripts, and best‑practice recommendations for efficient packet‑level troubleshooting.
The article analyzes the storage, query performance, high‑availability, and data‑loss challenges of running Prometheus on a 1,000‑node Kubernetes cluster and demonstrates how a Thanos‑based architecture—Sidecar, Query, Store Gateway, Compactor, Receiver, and object‑storage back‑ends—can be designed, tuned, and operated to achieve horizontal scalability, efficient down‑sampling, and reliable fault recovery.
This guide presents a systematic, layer‑by‑layer methodology for diagnosing and resolving NFS share mount failures, covering version differences, architecture layers, key daemons, RPC mechanisms, common error messages, detailed server and client checks, firewall and SELinux considerations, performance tuning, high‑availability setups, and monitoring.
This guide walks you through a systematic, seven‑layer approach to diagnosing port connectivity failures on Linux systems, covering service listening checks, local firewall rules, SELinux policies, network path analysis, cloud security groups, and application‑level protocols, with concrete commands, scripts, case studies, best‑practice recommendations, and monitoring tips.
An in‑depth comparison of Kubernetes Horizontal and Vertical Pod Autoscalers—including algorithms, configurations, performance benchmarks, mixed‑mode trade‑offs, custom‑metric integrations, and real‑world case studies—demonstrates how to choose and tune HPA, VPA, and KEDA for rapid traffic spikes while avoiding conflicts.
