Linux ops automation, cloud-native, Kubernetes, SRE, DevOps, Python, Golang and related tech discussions.
This article explains the correct ways to view container logs in Kubernetes, covering the underlying storage mechanism, kubectl log commands, log rotation, distributed log collection architectures like EFK and Loki, best‑practice recommendations, and detailed troubleshooting steps for common log‑related issues.
This article explains why disk‑full issues cripple Linux servers, outlines the concepts of filesystem, LVM and inode space, and provides a step‑by‑step, layered method using df, du, find, lsof and logrotate to locate and safely free space, handle deleted‑but‑open files, clean logs, manage databases, temporary caches, Docker resources, and LVM volumes, and finally set up monitoring and preventive measures.
This article provides a comprehensive, hands‑on guide to MySQL master‑slave replication, covering the underlying architecture, binlog formats, GTID and semi‑synchronous modes, detailed configuration steps, thread workflows, common failure scenarios with step‑by‑step diagnostics, and practical monitoring and failover scripts.
The article explains the concept of Bandwidth‑Delay Product (BDP), why an undersized TCP window throttles high‑bandwidth links, and provides step‑by‑step diagnostics, scripts, and practical Linux tuning methods—including window scaling, congestion‑control selection, and real‑world case studies—to eliminate BDP‑related performance bottlenecks.
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.
