Explaining distributed systems and architecture through stories. Author of the "JVM Performance Tuning in Practice" column, open-source author of "Spring Cloud in Practice PassJava", and independently developed a PMP practice quiz mini-program.
This article explains the concept of a Break Build in continuous integration, outlines common causes, and demonstrates how to use Jenkins pipeline scripts to automatically detect and notify the code contributors responsible for a failed build, helping teams quickly resolve deployment issues.
This article explains how to configure Jenkins to send build results via email, covering the default Mailer plugin setup, testing, and advanced Email Extension plugin usage with default, Groovy, and HTML templates, including pipeline script examples and best practices for reliable notifications.
This article recounts a failed Node.js installation on an older Ubuntu server caused by a missing GLIBC 2.28 library, details the attempted GLIBC upgrade script that led to system-wide segmentation faults, and explains how reinstalling a newer Ubuntu version resolved the issue while emphasizing careful backup practices.
This guide explains why accidental database deletion is a critical risk, outlines permission and audit measures, and provides detailed MySQL and file backup solutions—including encryption, multi‑site storage, cron scheduling, and ready‑to‑run Bash scripts—to ensure data safety and system stability.
This guide explains how to install Jenkins, Java, Maven, and Git in an offline Linux environment, covering required dependencies, downloading and installing packages, configuring tools, adding plugins, handling common errors, and finalizing the Jenkins setup for continuous integration pipelines.
This article explains the essential conditions, metrics, and scenario classifications for building high‑concurrency systems, then details common solutions such as database read/write separation, local and distributed caching, cache‑eviction policies, handling master‑slave lag, preventing cache penetration and avalanche, and applying CQRS to achieve scalable, high‑performance back‑end services.
This article explains why message queues are needed, outlines RabbitMQ's architecture, describes its basic concepts and working modes such as simple, work, fanout, direct and topic, and discusses reliability features like transactions, confirms, dead‑letter queues, TTL, clustering, ordering, and handling message backlogs.
On April 8, a Tencent Cloud API outage caused console login failures for nearly 2,000 customers, affecting several dependent services for 87 minutes, and the detailed root‑cause analysis and subsequent improvement actions are presented to enhance system resilience and change management.
This article explains how to manage Jenkins deployment permissions using RBAC and the Role‑Based Authorization Strategy plugin, covering RBAC fundamentals, plugin installation, creating users, jobs, groups, roles, and assigning permissions to ensure secure and organized pipeline access.
This article provides a comprehensive guide on using Jenkins Pipeline to automate the deployment of Java backend projects, covering pipeline concepts, parameterized builds, code checkout, Maven compilation, JAR packaging, remote uploading, backup, update, and service restart procedures.
