We share professional insights on cloud-native, DevOps & operations, Kubernetes, observability & monitoring, and Linux systems.
After Ubuntu's unattended-upgrades silently upgraded the kernel overnight, NVIDIA kernel modules vanished, causing nvidia-smi failures and Kubernetes GPU plugin crashes; the fix requires reinstalling DKMS packages for the new kernel and locking kernel versions to prevent recurrence.
This guide walks through deploying a three-node Kafka 3.8.1 cluster using KRaft mode and Docker Compose, covering machine preparation, kernel tuning, cluster ID generation, node-specific configuration, startup, and verification steps including topic creation and message production/consumption.
This article walks through using Velero to back up, restore, and migrate Kubernetes clusters, covering MinIO installation, Velero client and server setup, storage volume creation, backup location configuration, and execution of backup, restore, and scheduled backup commands.
The article explains why Nginx can sustain tens of thousands of simultaneous connections by using non‑blocking sockets, an epoll‑driven event loop, a fixed pool of worker processes, shared memory and memory‑pool optimizations, contrasting this design with Apache's prefork model.
The article reviews the most popular Chinese AI agent platforms—including QClaw, ArkClaw, CoPaw, DuClaw, KimiClaw, and MaxClaw—detailing each product’s core capabilities, ecosystem integration, deployment options, pricing models, and the trade‑offs that affect everyday users.
The article explains why the Kubernetes Dashboard has been deprecated due to security and multi‑cluster limitations, and introduces Headlamp as the officially endorsed, lightweight web UI that offers multi‑cluster management, strict RBAC enforcement, and extensible plugins, with simple installation steps.
This article explains how to centralize MySQL backup management on Kubernetes by creating a dedicated namespace, PVC, and CronJob, then shows commands to monitor jobs and restore databases from compressed backup files, providing a complete, repeatable solution for DBAs.
This guide explains how to set up Prometheus monitoring for PostgreSQL using the open‑source postgres_exporter, covering both single‑node Docker installation and multi‑node configuration with custom authentication files and Prometheus scrape settings.
This guide explains why gray (canary) releases are essential for production stability in internet companies, and provides step‑by‑step configurations using Istio’s VirtualService, Gateway, and DestinationRule resources to route traffic by percentage or request headers in a Kubernetes cluster.
Kubernetes announced the deprecation of Ingress NGINX with limited maintenance until March 2026, urging users to adopt the GA‑ready Gateway API—offering better scalability, clear status fields, and native support for AI workloads—while providing migration guidance, code examples, and performance benchmarks.
