We share professional insights on cloud-native, DevOps & operations, Kubernetes, observability & monitoring, and Linux systems.
This article recounts a midnight CPU alert incident and walks through systematic backend troubleshooting—from initial system checks and JVM profiling to algorithm refactoring, database indexing, Docker‑based isolation, and proactive monitoring—demonstrating how to restore service performance and prevent future outages.
The December 11, 2024 OpenAI outage, caused by a misconfigured monitoring service that overloaded the Kubernetes control plane, led to a four‑hour service disruption and was resolved through cluster scaling, API blocking, and resource expansion, highlighting critical infrastructure risks for large‑scale cloud‑native operations.
This article documents a step‑by‑step investigation of a compromised Linux server that exhibited 100% CPU usage, detailing process, network, and startup‑service analysis, the discovery of a cryptomining malware, and the complete removal procedure.
This article introduces three free, open-source MySQL client tools—MySQL Workbench, DBeaver, and phpMyAdmin—detailing their main features, cross‑platform support, and suitability for developers and administrators seeking powerful yet user‑friendly database management solutions.
This article details Bilibili’s 18‑month, multi‑region data‑center migration, covering background, project challenges, comprehensive planning, execution steps, risk management, automation, and post‑migration benefits, offering practical insights for large‑scale infrastructure relocation and operational optimization.
This article provides a comprehensive overview of Git, GitLab, and GitHub, explaining their core functionalities, typical scenarios, and key distinctions to help developers and DevOps engineers choose the right version‑control solution for their projects.
This guide explains how to quickly retrieve the IP address of a running Docker container using simple commands such as `docker ps`, `docker inspect`, and a formatted inspect query, with step‑by‑step instructions and example output for easy debugging and network configuration.
Effective operations management acknowledges inevitable downtime, emphasizes automation, prioritizes proactive prevention, treats technology as a means rather than an end, integrates closely with development through DevOps, relies on strong communication, and continuously addresses pervasive security challenges to minimize business impact.
This article demonstrates how to use xargs with find and tar for file handling, ps for identifying high‑memory and high‑CPU processes, and netstat combined with awk and sort to inspect TCP connection states and the top requesting IP addresses, providing essential command‑line techniques for system administrators.
This article introduces MetalLB, an open‑source load‑balancing solution for self‑managed Kubernetes clusters, explains its deployment requirements, operating principles, Layer 2 and BGP modes, and provides step‑by‑step installation and verification instructions using Kubernetes manifests, Helm, and Kustomize.
