Focused on sharing DevOps, Kubernetes, Linux, Docker, Istio, microservices, Spring Cloud, Python, Go, databases, Nginx, Tomcat, cloud computing, and related technologies.
This guide outlines the five most common Kubernetes operational pitfalls, offers step‑by‑step remediation practices, introduces three emerging trends such as AI‑assisted troubleshooting, serverless clusters, and Tekton CI/CD, and provides three ready‑to‑copy kubectl commands to streamline daily management.
The article warns that the high‑privilege OpenClaw AI agent can cause data loss, credential theft, and unexpected charges, then provides a step‑by‑step guide to fully remove it, revoke API keys, and follow best practices to keep the tool from becoming a security liability.
OpenClaw, an open‑source AI Agent framework that combines large‑model reasoning, automation scripts, and an execution engine, has exploded in popularity, but a CCTV warning highlights serious security concerns such as network attacks, data leakage, and remote control when deployed without strict permission controls and auditing.
This article walks through a real‑world Java service on Kubernetes, detailing the initial confidence, recurring OOM and rollout issues, and a multi‑round remediation that introduced container‑aware JVM settings, refined resource requests, OOM dumps, probes, and metrics, ultimately achieving three years of stable operation with lower resource usage.
This article provides a comprehensive guide to Kubernetes Liveness Probes, explaining their purpose, the three probe types (HTTP GET, TCP Socket, Exec), how they differ from Readiness and Startup probes, practical YAML examples, verification steps, common pitfalls, troubleshooting tips, and best‑practice recommendations for improving pod stability and self‑healing.
A real‑world production incident where GC pauses, thread‑pool exhaustion, and slow SQL combined to drop QPS from 3000 to 1400 and inflate response times from 200 ms to over 2 s, with detailed analysis, diagnostic criteria, and step‑by‑step optimizations that restored performance.
A production incident shows a server with 80% CPU usage but a Load Average over 40, revealing that high load often stems from IO wait and soft interrupts rather than CPU saturation, and provides a step‑by‑step troubleshooting guide using top, vmstat, iostat and ps.
This article shares practical, step‑by‑step guidance from a 15‑year e‑commerce veteran on why, when, and how to optimize databases—including segregation, archiving, query tuning, replication lag detection, parameter tweaks, partitioning, ProxySQL, caching, vertical scaling, and monitoring—to achieve faster, more reliable services.
This article explains why Kubernetes security feels like navigating in the dark, breaks down the platform’s core resources, outlines common attack vectors such as container escape and token abuse, compares managed versus self‑hosted clusters, and presents a real‑world EKS attack case with practical mitigation insights.
Learn how to protect your web application from brute‑force login attacks by configuring Nginx rate limiting, with step‑by‑step instructions, example configurations, testing methods, custom error pages, and best‑practice tips such as IP whitelisting, HTTPS enforcement, and complementary security measures.
