Maintained by a like‑minded team, covering both operations and development. Topics span Linux ops, DevOps toolchain, Kubernetes containerization, monitoring, log collection, network security, and Python or Go development. Team members: Qiao Ke, wanger, Dong Ge, Su Xin, Hua Zai, Zheng Ge, Teacher Xia.
This article explains Ceph RBD QoS concepts, describes a full testing environment and workflow, shows command‑line configurations and fio benchmarks, and summarizes the findings that image‑level QoS limits are effective while pool‑level limits are not.
At KubeCon China 2023, experts Liu Kai and Dong Shandong presented a three‑part deep dive into Kubernetes observability challenges, demonstrating how eBPF enables comprehensive data collection across all stack layers, seamless integration, and intelligent root‑cause analysis through dimension attribution, anomaly bounding, and fault‑tree methods.
This article explains the G1 garbage collector’s heap layout, collection cycles, pause prediction, log analysis, and monitoring tools, helping Java developers diagnose and resolve performance issues such as frequent restarts, OOM, CPU spikes, and periodic latency spikes.
This guide explains how to retrieve the true client IP in environments with multiple proxy layers by understanding remote_addr, X-Forwarded-For, and X-Real-IP headers, and configuring HAProxy and Nginx Ingress with appropriate options to forward and preserve the original IP.
This guide demonstrates essential Java Stream API techniques—including grouping collections into maps, extracting first entries, performing reductions to find max or min, converting streams to lists, sorting, removing duplicates, and a comprehensive list of frequently used stream operations—providing practical code examples for Java 11 and 17.
This guide explains why frequent garbage collection and heap memory overflow occur in Java applications, demonstrates how to reproduce the issue with a sample program, and walks through various techniques—including jmap histograms, heap dumps, VisualVM analysis, and remote JMX monitoring—to diagnose and resolve out‑of‑memory errors.
This guide explains how KubeVela, as a declarative application delivery control plane, leverages GitOps with FluxCD to provide end‑to‑end workflows, infrastructure and application deployment, multi‑cloud strategies, and automated CI/CD pipelines for both platform operators and developers.
This guide walks through deploying Loki via Helm, configuring the OpenTelemetry Collector to use a filelog receiver and Loki exporter, and enabling Kubernetes event collection, providing step‑by‑step commands and YAML snippets for a complete logging pipeline in a Kubernetes cluster.
This guide walks through installing OpenTelemetry Collector on a Kubernetes cluster using Helm, configuring DaemonSet and Deployment collectors, integrating Prometheus for metrics, and customizing receivers, processors, and exporters to achieve comprehensive observability of nodes, pods, containers, and cluster resources.
This guide walks through automating frontend development tasks—using Husky for Git hooks, lint‑staged for staged file filtering, commitlint for standardized commit messages, ESLint and @typescript-eslint for code checking, and Prettier for formatting—providing installation commands, configuration snippets, and practical usage tips for React + TypeScript projects.
