Linux ops automation, cloud-native, Kubernetes, SRE, DevOps, Python, Golang and related tech discussions.
This article presents ten practical PromQL query examples covering CPU, memory, disk, network, database, Kubernetes, and business metrics, explains the underlying concepts, provides alert thresholds and best‑practice tips, and includes advanced optimization and alert‑rule design guidance for reliable monitoring.
This guide shows operations engineers how to dramatically improve web application protection by configuring often‑overlooked HTTP security headers—CSP, X‑Frame‑Options, HSTS, Referrer‑Policy, Permissions‑Policy, and more—through practical Nginx/Apache/Node.js examples, verification scripts, and automation tips.
This article walks through SaltStack’s core architecture, master‑minion communication, authentication, Grains, Pillar, and Orchestrate, then demonstrates a real‑world high‑availability web cluster deployment that reduces a three‑day rollout to just 30 minutes, while covering performance tuning, monitoring, API integration, GitFS, and security hardening.
This guide walks you through designing and deploying a highly available HDFS architecture with dual NameNodes, ZooKeeper‑based failover, and a tuned YARN resource scheduler, covering detailed configuration files, failover testing, performance tuning, monitoring, automated health checks, capacity planning, and best‑practice checklists for production‑grade big‑data platforms.
This comprehensive guide walks you through the reasons for MySQL master‑slave replication, deep technical concepts, step‑by‑step deployment, configuration tuning, monitoring, and real‑world troubleshooting to achieve a high‑availability database cluster that can survive production outages.
This guide walks through the evolution from noisy alert storms to intelligent AIOps, covering AIOps fundamentals, why it matters now, core capabilities like anomaly detection, root‑cause analysis, capacity forecasting and self‑healing, a practical implementation roadmap, toolchain suggestions, common pitfalls, and future trends.
This comprehensive guide compares Redis Sentinel and Redis Cluster, detailing their design philosophies, configuration examples, performance benchmarks, operational complexity, scalability, high‑availability features, and migration strategies, helping engineers choose the optimal solution for demanding production environments.
This step‑by‑step guide shows how to set up Ansible, configure password‑less SSH, create inventory and playbooks, and automate the bulk deployment, configuration, rolling updates, and monitoring of Nginx web servers across dozens of machines while covering advanced techniques such as Vault, dynamic inventory, CI/CD integration, and rollback strategies.
From midnight alerts of service timeouts to hidden CPU hogs and memory leaks, this guide walks Linux operators through 20 advanced commands, five performance metrics, real‑world troubleshooting scripts, and a comprehensive optimization checklist, enabling proactive system health management.
This article walks through a systematic, bottom‑up performance tuning process for Kubernetes clusters—covering kernel parameters, container runtime, kubelet, scheduler, and pod resource settings—backed by a real‑world e‑commerce case study that reduced latency by over 80% and cut OOM events by 97.5%.
