This guide walks beginners through understanding logs, using them for error tracing, applying monitoring and alerts, and performing remote debugging to quickly pinpoint and resolve production problems, emphasizing practical steps and best practices for reliable system maintenance.
On July 15, 2021, the China Academy of Information and Communications Technology unveiled the 2021 China DevOps Status Survey Report, detailing the nation’s digital transformation, the growing demand for rapid software delivery, the extensive multi‑company survey methodology, and key findings on DevOps adoption and future trends.
Severe flooding in Zhengzhou crippled core telecom facilities, prompting emergency repairs, backup HLR deployment, and temporary authentication shutdowns, while highlighting the critical role of network resilience and disaster‑recovery strategies for maintaining communication services during natural disasters.
Over a month of systematic JVM tuning reduced Full GC from 40 times per day to once every ten days and halved Young GC duration by adjusting heap sizes, survivor ratios, and metaspace settings while investigating and fixing a memory leak caused by an anonymous inner class listener.
This guide outlines a comprehensive backend technology stack for startups, covering language choices, core components, development processes, infrastructure services, database options, monitoring, CI/CD, and operational best practices to help teams design, select, and implement a reliable server-side architecture.
Discover a comprehensive Redis best‑practice guide covering memory optimization, performance tuning, high reliability, daily operations, resource planning, monitoring, and security, with actionable tips such as key length control, maxmemory settings, lazy‑free, connection pooling, replication strategies, and safe deployment practices.
This guide walks through the concepts of ELK, why log management is essential for Kubernetes, three collection strategies, required log fields, and step‑by‑step deployment of Elasticsearch, Kibana, Filebeat, and Logstash—including YAML manifests, configuration snippets, and Kibana UI setup—for a fully operational, cloud‑native logging solution.
This article examines the challenges faced by a search middle platform—such as inaccurate impact assessment, unstable underlying clusters, and missing process standards—and details a comprehensive quality‑assurance strategy that includes baseline test suites, stability practices, performance testing, emergency drills, and systematic monitoring to ensure reliable search services.
Dust is a Rust‑written, visually rich replacement for the traditional du command that shows directory sizes as a colored tree, making it easier to spot large folders and understand disk consumption at a glance.
Ansible, a rapidly popular open‑source automation tool built on Python, simplifies batch system configuration, program deployment, and command execution with thousands of built‑in modules, offering a beginner‑friendly yet powerful solution for modern operations teams.
In this article, a programmer recounts the recent Bilibili outage, analyzes its timeline, proposes technical root‑cause hypotheses such as CDN failure and service‑chain avalanche, shares insights from the platform’s high‑availability architecture, and outlines preventive techniques for building more resilient backend systems.
This article details a practical smooth‑release process for a cloud‑office system, explains how to use Nginx health‑check endpoints to take instances offline, and presents three AB‑testing routing strategies—IP‑based, cookie‑based, and AB‑cluster proxy—complete with configuration examples, pros and cons, and deployment steps.
The article analyzes Bilibili’s recent service outage, explains why high availability matters, introduces key metrics like MTBF and MTTR, and outlines practical strategies such as redundancy, rate limiting, isolation, failover, timeout control, circuit breaking, degradation, and multi‑region deployment to build resilient systems.
This article describes Baidu's comprehensive approach to monitoring game microservices, covering the background, initial monitoring tools, evolution of the monitoring system, systematic design for risk control, intelligent detection, alarm optimization, efficient fault localization, and future outlook for high‑availability architecture.
The article analyzes Bilibili's recent half‑hour service disruption, explores technical rumors such as an etcd crash, examines Kubernetes‑based cloud‑native infrastructure, reviews similar historic outages, and offers expert recommendations for improving high‑availability and disaster‑recovery in large‑scale internet services.
This guide walks through practical troubleshooting steps for typical production incidents—including disk exhaustion, high CPU, Java OOM, MySQL deadlocks and slow queries, Redis memory alerts, network TCP issues, and business‑log analysis—providing concrete commands, diagrams and mitigation strategies for each layer.
This article details Baidu's comprehensive microservice monitoring practice for its game platform, covering the initial fragmented setup, systematic redesign across risk control, intelligent monitoring, smart alerting, and rapid fault localization, and presents the resulting monitoring architecture, visualizations, and future improvement goals.
This article outlines practical shell‑script guidelines for automating system and application operations, covering script header conventions, formatting, error handling, safe use of commands, variable handling, file packaging, pipeline restrictions, concurrency locks, logging, and risk‑mitigation strategies to make automation both efficient and secure.
This guide outlines essential incident management principles—prioritizing business recovery and timely escalation—and presents practical methodologies such as restart, isolation, and downgrade, while detailing user impact handling, organizational roles, and post‑mortem best practices.
The article reveals that while DevOps has exploded with trends like Hybrid Deployments, DataOps, and GitOps, the overlooked but critical shift toward non‑invasive production debugging—providing code‑level observability without disrupting services—will become essential for modern DevOps teams.
This article outlines how to design, print, collect, and manage online service logs efficiently—covering log levels, key information, formatting, rolling, local vs. remote storage, real‑time collection, and tool selection—to turn logs into a valuable debugging and analytics asset.
This article provides a comprehensive overview of Redis monitoring metrics—including performance, memory, basic activity, persistence, and error indicators—along with recommended monitoring tools, configuration settings, and command-line examples for gathering and interpreting these metrics in production environments.
This article surveys common software release strategies—stop‑the‑world, canary, gray/rolling, blue‑green, A/B testing, and traffic‑isolation—detailing their advantages, disadvantages, and ideal scenarios, and then presents Alibaba’s practical best‑practice guide for planning, monitoring, and continuously delivering high‑quality releases.
Learn ten practical strategies—from safe change rollbacks and cautious destructive commands to robust backups, clear prompts, vigilant monitoring, and disciplined handovers—that help DBAs and operations engineers avoid costly system failures and maintain reliable production environments.
The article explains the concept of gray release, outlines a basic architecture with strategy configuration, execution, and service registry components, describes common traffic-splitting strategies, and details practical implementations using Nginx, gateway services, and complex scenarios involving data synchronization and message queues.
This article explains JD.com's order transfer process, inventory hierarchy, support relationships, order transfer and planning systems, fulfillment workflow, and risk control mechanisms, illustrating how millions of orders are allocated, scheduled, and executed across multiple warehouses and channels.
This article explains JD.com's end‑to‑end order fulfillment process, the concepts of 211/411 delivery promises, the mechanisms behind order splitting by warehouse, merchant and payment dimensions, and how monetary discounts are proportionally allocated across SKUs.
This article explains why RocketMQ was chosen, describes its large‑scale usage, details the design and implementation of a same‑city dual‑center architecture with near‑by production and consumption, outlines failover mechanisms, governance practices, lessons learned, and future plans for the messaging platform.
SCADA and DCS originated as separate control systems but have converged over time; SCADA focuses on distributed monitoring and data acquisition across wide geographic areas, while DCS emphasizes centralized control, and modern high‑bandwidth networks now allow them to operate together as a unified monitoring solution.
The article analyzes the current marginalization of IT departments in traditional enterprises due to limited value, hierarchical organization, and misaligned assessment, and proposes that digital transformation—redefining IT roles, aligning technology with business goals, and building a digital foundation—can turn IT into a profit‑center and strategic enabler.
Effective serverless governance requires comprehensive observability, traffic management, and service registration built on Kubernetes, using either a mesh sidecar with Istio or an embedded SDK, to simplify complex operational tasks such as discovery, fault tolerance, gray releases, and metric correlation for large‑scale function deployments.
This article examines real-world database deletion incidents, the associated legal consequences, and how DevOps culture and operational best‑practices can turn such mistakes into learning opportunities rather than career‑ending failures.
The article examines how ByteDance, Douyin, TikTok and other Chinese tech giants operate massive data centers with terabit‑level outbound bandwidth, millions of servers, and extensive CDN and load‑balancing architectures to support hundreds of millions of concurrent users.
This guide explains how Zabbix 4.4+ lets you use custom JavaScript in webhook media types to send alert notifications, details the built‑in Zabbix objects, shows configuration steps, data validation, logging rules, and provides a complete DingTalk webhook script with testing instructions.
This article analyzes the large‑scale architecture of WeChat Moments, detailing image and video traffic characteristics, hardware and software safeguards, disaster‑recovery mechanisms, capacity assessment, and a series of flexible strategies such as compression format changes, bitrate reduction, buffer pools, and timeline throttling to handle holiday spikes.
This article compares agent‑based and network‑data approaches to cloud‑native application performance monitoring, discussing their architectures, advantages, challenges, and how combining white‑box and black‑box techniques can improve fault detection, scalability, and operational efficiency in complex cloud environments.
The article outlines how digital‑champion enterprises achieve superior performance by integrating four core ecosystems—customer solutions, operations, technology, and talent—through strategic planning, partnership, and advanced technologies such as AI, big data, and industrial IoT, while highlighting maturity stages and practical implementation steps.
This article outlines the background, current challenges, and recent enhancements of CI/CD‑integrated business security compliance detection for mobile apps, including incremental source‑code scanning, call‑graph analysis, and performance gains, while also discussing future directions and benefits.
This tutorial provides detailed commands and configurations for installing a specific Docker version, setting up persistent MySQL containers, importing Apollo database scripts, and deploying Apollo Config, Admin, and Portal services using Docker on a CentOS host.
Facing surges during holidays and major shopping events, Dada’s DevOps team built a cloud‑native elastic scaling system that combines fine‑grained capacity management, multi‑cloud support, metric‑driven auto‑scaling, and extreme‑scale down strategies, delivering stable delivery performance while cutting costs.
This article presents Autohome's Cloud Platform (Home Cloud) technical debt governance framework, defining ideal technical states, outlining five systematic steps—from factor collection to project execution—and sharing practical outcomes that have enhanced the competitiveness of its applications and development teams.
The article provides a comprehensive overview of digital transformation, covering its definition, essential strategic questions, key drivers such as customer expectations, cloud and AI, priority areas in the value chain, practical frameworks, roadmap steps, expected benefits and common reasons for failure.
This article explores the fundamentals of IT monitoring, examines common challenges such as scalability, reliability, and alert fatigue, compares four implementation approaches—from open‑source to fully custom solutions—and presents practical techniques like alert convergence, suppression, and automation to build a robust, adaptable monitoring platform.
The article examines ByteDance's massive data‑center infrastructure, detailing server counts, multi‑terabit outbound bandwidth, dual‑link designs, CDN acceleration, and comparisons with other Chinese tech giants, illustrating how such scale enables seamless video streaming for hundreds of millions of daily users.
This article explains what disaster recovery is, distinguishes it from backup, outlines classification types, compares their core differences, and details four DR maturity levels with their advantages and drawbacks to help organizations build resilient data protection strategies.
Lin Ying, a senior test manager at Guoxin Securities, shares insights from his GOPS 2021 talk on the securities industry's digital transformation, current IT challenges, and a comprehensive red‑blue exercise strategy that combines full‑link load testing, automated workflows, and proactive monitoring to ensure system stability during market peaks.
This article compiles the 20 most common DevOps interview questions, providing detailed explanations of concepts such as the DevOps‑Agile distinction, core benefits, key tools, anti‑patterns, KPI metrics, automation advantages, containers, microservice frameworks, version control practices, Git revert techniques, post‑mortem meetings, asset vs configuration management, continuous testing elements, and essential development and infrastructure operations.
This article analyzes the stability challenges of a multi‑store chain’s product‑copy mechanism, outlines design goals for isolation and scalability, and presents short‑ and long‑term monitoring, flow‑control, and emergency‑response strategies to ensure reliable large‑scale operations.
This tutorial explains how to use Zabbix Agent 2 to monitor MongoDB databases and clusters, covering the required read‑only user setup, relevant Zabbix templates, key metrics such as jumbo chunks, connection pool stats, server status, collection and replSet information, and practical configuration examples.
Slack’s resilience engineering team outlines a structured chaos‑engineering workflow—identifying potential failures, ensuring fault tolerance, and deliberately injecting faults in development and production—to safely test system robustness, validate hypotheses, and continuously improve reliability through regular disaster‑theater exercises.
This article details how a major securities firm analyzed business stability, built a comprehensive stability engineering platform using chaos engineering, practiced extensive fault‑injection drills, and outlines future directions such as random‑scenario exercises, red‑blue battles, and AI‑driven risk detection.
At the 16th GOPS Global Operations Conference, Shen Hui of DingMao Technology explained how time‑series data analysis underpins AIOps, outlining its four‑step workflow, key challenges, and the company’s three‑pipeline solution that enables trend forecasting, fault prediction, and a robust AI‑driven operational platform.
This article provides practical guidelines for writing Dockerfile instructions—including RUN, CMD, ENTRYPOINT, ADD, COPY, and WORKDIR—offering syntax recommendations, best‑practice examples, and advice on when to use each command to create efficient, maintainable container images.
This article outlines a comprehensive release workflow that integrates Jira, GitLab, and Jenkins using webhooks, detailing manual and automated publishing methods, configuration steps for each tool, pipeline design, and code examples to achieve a closed‑loop deployment process.
This guide explains Nginx's core concepts, installation on Linux, common commands, configuration structure, reverse‑proxy and load‑balancing implementations, static‑dynamic separation, and high‑availability setup with keepalived, providing step‑by‑step examples and practical code snippets.
This article details 58 Group's comprehensive evaluation of DorisDB, TiFlash, and ClickHouse for large‑scale analytical workloads, covering functional and performance benchmarks, real‑world use cases such as security analysis and DBA operations, data ingestion methods, cluster architecture, automation practices, and lessons learned.
The article outlines ten frequent DevOps pitfalls—from out‑of‑order delivery and role misunderstandings to neglecting security and team fatigue—and provides practical guidance on planning, automation, quality, and cultural practices to achieve successful continuous delivery.
Gaode’s new serverless/FaaS platform, built on Alibaba Cloud Function Compute with custom C++, Go, and Node.js runtimes, now processes over 100 000 QPS, enabling a unified client‑cloud codebase, rapid feature iteration, automatic scaling and cost savings, while supporting extensive monitoring, Dapr integration, and future edge‑computing enhancements.
This article provides a detailed, step‑by‑step guide to Linux's built‑in performance monitoring utilities—top, free and vmstat—covering their purpose, essential options, output interpretation, interactive shortcuts, and practical examples for effective system administration.
Learn how to set up basic Nginx load balancing with a minimal nginx.conf, create multiple Node.js services, and explore common strategies like round-robin, weighted round-robin, and IP hash, complete with code examples and testing results to ensure even request distribution.
This article outlines the challenges of operating petabyte‑scale big‑data clusters and presents a comprehensive monitoring framework—including basic and upgraded monitoring layers, metric collection, alerting pipelines, and strategies for alarm convergence and grading—to ensure reliable, proactive SRE operations.
A sysadmin narrates how he monitors four Redis nodes, detects master failure with PING, promotes a slave using SLAVEOF, reconfigures the remaining replicas, and ultimately automates the entire process with a custom Sentinel program and a multi‑node Sentinel cluster for high availability.
This article explains the DevOps lifecycle—covering planning, coding, building, testing, releasing, deploying, operating, monitoring, and CI/CD—and lists popular tools for each stage to help teams achieve continuous delivery and efficient collaboration.
The article explains service governance and SRE practices, detailing goals, components, overload handling, capacity planning, and strategies to maintain continuous 24‑hour service reliability while reducing manual toil.
This tutorial walks you through Python list syntax, common operations such as adding, modifying, searching, deleting, sorting, and nesting, complete with code examples and output screenshots, helping beginners and intermediate programmers deepen their understanding of list handling.
This guide explains how to design and practice a structured incident‑response process—defining problems, applying quick‑recovery steps, analyzing root causes, standardizing solutions, and assigning critical roles—to dramatically reduce production outage duration.
Microservice architectures must handle inevitable network, hardware, and application errors by employing fault‑tolerant patterns such as graceful degradation, change management, health checks, fail‑over caches, retry logic, rate limiting, circuit breakers, and testing strategies to maintain service reliability and user experience.
This article provides a comprehensive guide for startups on choosing and assembling a backend technology stack, covering language choices, core components such as project management, DNS, load balancing, CDN, RPC frameworks, service discovery, databases, NoSQL, messaging, logging, monitoring, configuration, deployment, and operational best‑practice recommendations.
This guide outlines a structured approach to incident response, detailing problem definition, temporary fixes, root‑cause analysis, solution design, implementation, and standardization, while highlighting four critical roles—commander, communicator, rapid‑recovery lead, and diagnosis lead—to ensure swift, coordinated recovery of production services.
This guide explains why monitoring is essential throughout a product lifecycle, outlines monitoring modes and methods, compares health checks, logs, tracing and metric solutions, and provides a detailed Prometheus‑based monitoring architecture with concrete metric definitions, alerting rules, and incident‑response procedures.
This article explores how to accurately measure QPS in Java performance‑testing scripts by using JsonPath and regular‑expression validation, analyzes error margins under different thread and iteration configurations, and demonstrates that exception handling has minimal impact on overall throughput.
This article describes how a Chinese securities firm applied big‑data‑driven clustering and Bayesian methods to automate root‑cause analysis of trading‑system anomalies, detailing the challenges, algorithmic designs, practical implementations, and evaluation results that demonstrate significant reductions in false alarms and faster recovery.
JD.com’s AIDCTwins platform leverages low‑code modeling, IoT sensing and cross‑platform 3D visualization to create a digital twin of its massive data‑center infrastructure, dramatically cutting labor costs, enabling real‑time updates, and boosting intelligent, green operation across thousands of servers and racks.
This article explains the fundamental differences between traditional and cloud‑native monitoring systems, outlines the challenges each faces, and details JD.com's evolution from physical servers to JDOS 2.0, describing its modular architecture, deployment model, and ongoing optimization efforts.
This guide explains why a Jenkins agent fails to start with the error "provided port: 8182 is not reachable" and provides step‑by‑step troubleshooting methods such as network testing, Docker port mapping verification, and ensuring proper communication between the agent and master nodes.
The article explains how JD’s retail user growth team built a data‑driven, AI‑powered “machine” that automates user insight, operation planning, conflict resolution, external touchpoint, and real‑time strategy engines to achieve precise, large‑scale user acquisition and retention.
The article explains that DevOps should be viewed as an interdisciplinary interface rather than a specific job title, contrasts it with traditional roles like software developer or system administrator, and illustrates the concept with a Java‑style code example, while also including a brief promotional note about a DevOps training course.
This article explains how ByteDance's private cloud platform TCE leverages Kubernetes deployments, oversubscription, elastic scaling, and mixed online‑offline resource sharing to dramatically improve cluster resource utilization while maintaining service stability during traffic peaks and valleys.
This article explains Docker and Kubernetes logging challenges, compares logging drivers, introduces S6‑based container logging, and presents a node‑level log‑agent architecture using Filebeat, Logrotate, Kafka, and Elasticsearch to achieve reliable, auto‑rotating log collection in production environments.
This article explores Nginx's origins, why it outperformed Apache, its core features such as event‑driven architecture and modularity, explains forward and reverse proxy concepts, and details the load‑balancing algorithms Nginx supports, providing practical insights for backend engineers.
This article introduces Meituan's elastic scaling platform, detailing its evolution from version 1.0 to 2.0, the technical and operational challenges faced, the strategies adopted for promotion and resource management, and several real‑world business scenarios where elastic scaling reduces cost and improves reliability.
The article explains why large internet firms adopt cross‑region multi‑active architectures for high availability, compares cold backup, hot standby, same‑city active‑active, and cross‑region active‑active solutions, discusses their trade‑offs, and presents practical design patterns and questions for implementing such systems.
This article outlines essential Kubernetes best‑practice guidelines for production environments, covering health probes, resource allocation, RBAC, cluster configuration, networking policies, monitoring, logging, stateless design, autoscaling, runtime security, and strategies for zero‑downtime and failure recovery.
This article explains the concept, features, and practical usage of flame graphs—including how to generate them from Java thread dumps with Perl scripts—to help developers visualize call‑stack frequencies and quickly identify performance bottlenecks in backend services.
This article explains why well‑structured error logs are essential for troubleshooting, analyzes common sources of errors, and provides concrete guidelines and code examples to make logs complete, specific, and actionable for developers and operations teams.
This article presents a comprehensive, automated solution for API robustness testing that extracts baseline cases, generates exhaustive parameter‑level test data, executes them at scale, and analyzes results to identify abnormal responses without manual effort, thereby improving testing efficiency and software quality.
This article explains common Kubernetes component and node failures, introduces the Node Problem Detector (NPD) for monitoring and reporting issues, and provides step‑by‑step deployment, configuration, and remediation procedures to keep clusters reliable.
This article presents Baidu's end‑to‑end intelligent delivery system for its massive information‑flow recommendation platform, detailing challenges in continuous integration, testing, deployment, and operations, and describing the architectural, algorithmic, and process innovations that enable high‑speed, low‑cost, and largely unmanned releases.
This article details Dada Group’s implementation of an intelligent elastic scaling architecture that automatically adjusts capacity during peak promotions and low‑traffic periods, improving delivery reliability, reducing costs, and supporting multi‑cloud and multi‑runtime environments through sophisticated monitoring and auto‑scaler mechanisms.
This article explains the concept of gray (canary) release, outlines a basic architecture with essential components, describes common gray release strategies such as header, cookie, and parameter based routing, and provides practical guidance for implementing gray releases using Nginx, gateway services, and handling complex scenarios like multi‑service and database migrations.
This article presents Meituan's elastic scaling platform, detailing its evolution from Hulk 1.0 to Hulk 2.0, the technical and operational challenges faced, the solutions implemented for resource management and multi‑tenant scaling, and real‑world business scenarios such as holiday, peak‑hour, and emergency capacity provisioning.
This article explains the meaning of Nginx upstream directives max_fails and fail_timeout, demonstrates their behavior with a PHP‑FPM test setup, and clarifies common misconceptions and best‑practice settings for reliable load balancing.
This article introduces Prometheus as an open‑source monitoring system and time‑series database, explains its core components such as Server, Exporter, PushGateway and Service Discovery, and provides step‑by‑step Docker deployment instructions together with Grafana integration for visualizing metrics.
This guide outlines critical precautions and best‑practice tips for executing risky Linux commands—such as rm, chmod, cat, dd, tar, and MySQL—by verifying environments, backing up data, using safe aliases, and avoiding common pitfalls that can cause catastrophic data loss.
The article shares eight authentic production incident cases—from frequent JVM Full GC and memory leaks to cache avalanches, DNS hijacking, and database deadlocks—detailing their root causes, diagnostic steps, code snippets, and practical remediation strategies for engineers facing similar challenges.
This article introduces four widely used Linux monitoring utilities—iotop, htop, IPTraf, and Monit—explaining their core features and how they help quickly diagnose system performance and network issues for effective operations management.
This article explains the fundamentals of CI/CD within DevOps, compares leading CI/CD tools, outlines a four‑stage implementation process, and details the numerous benefits such as faster delivery, higher quality, improved productivity, and reduced costs.
The article uses the OVH data‑center fire as a stark reminder that startups must design robust data disaster‑recovery strategies, explaining why backups, off‑site storage, and proper architectural planning are essential to prevent catastrophic data loss and potential business collapse.
The article analyzes the instability of a company's Kubernetes clusters, identifies root causes such as unstable release processes, lack of monitoring, logging, and documentation, and proposes comprehensive solutions including a Kubernetes‑centric CI/CD pipeline, federated Prometheus monitoring, Elasticsearch logging, centralized documentation, and integrated traffic management with Kong and Istio.
The article provides a comprehensive overview of Site Reliability Engineering (SRE), explaining its origins, definition by Google, required skill sets, typical responsibilities, tools used, and how the role has evolved within DevOps and modern cloud‑native environments.
