The article explains why Spring Cloud Gateway may still call a downed service due to a stale CachingRouteLocator cache, and demonstrates how to listen to Nacos InstancesChangeEvent to evict the cache so the gateway always uses the latest service list.
This article explains Nacos's dynamic service discovery, covering its core architecture, communication protocols, registration and heartbeat mechanisms, subscription and push processes, as well as SDK query flows, and includes detailed code examples to illustrate each step.
This article explains how the open‑source Higress gateway integrates with Nacos, outlines two major microservice‑gateway trends, and provides step‑by‑step configuration examples for service discovery, Ingress routing, canary releases, and custom Wasm extensions.
The article explains Nacos’s open‑source service registry and discovery mechanisms, detailing client auto‑configuration, registration and health‑check workflows, server‑side instance handling, asynchronous copy‑on‑write processing, heartbeat cleanup, and cluster synchronization, while comparing its AP/CP capabilities to Zookeeper and Eureka.
This guide walks you through cloning the Nacos repository, compiling it with Maven (including special handling for Mac M‑series chips), explains the role of Protocol Buffers, and shows how to configure and run the Nacos console in standalone mode.
The article details a sudden CPU spike in a Java backend service using Nacos, walks through diagnosing the offending thread with top and jstack, analyzes Nacos client thread creation and scheduled gray‑config tasks, explains Raft network partition handling, and presents a fix that checks config health and avoids unnecessary thread creation.
This article provides a comprehensive overview of Nacos, covering its origins, evolution of the configuration center, typical use cases, step‑by‑step integration methods, troubleshooting tips, high‑availability mechanisms, commercial MSE advantages, migration guides, and the upcoming features in Nacos 3.0.
This article demonstrates how to create a dynamically configurable thread pool in a Spring Boot backend by leveraging Nacos as a configuration center, covering dependency setup, YAML configuration, Java implementation with @RefreshScope, runtime parameter updates, and a simple controller for testing.
Starting with Nacos 2.2.0, this guide shows how to create a custom DM8 database plugin via the SPI mechanism, add Maven dependencies, import the required scripts, configure connection settings and set the platform property, enabling Nacos to persist data in a DM8 database.
This guide explains how to create a custom Oracle datasource plugin for Nacos 2.2 by adding Maven dependencies, importing the Oracle SQL script, configuring connection properties, and setting the datasource platform, enabling Nacos to use Oracle instead of the default MySQL or Derby.
This tutorial walks you through setting up a Spring Cloud Gateway service using Spring Boot, configuring static and Nacos‑driven dynamic routes, and implementing a custom authentication filter with Redis token validation, providing a complete beginner‑friendly guide to gateway development.
The article introduces Nacos 2.2.0, explains its core functions, details major changes such as removal of legacy code, new data‑source, custom‑environment, and trace plugins, lists added features, refactorings, bug fixes, and provides reference links for further reading.
The Nacos 2.2.0 GA release introduces several new plugins—including rate‑limiting, custom environment variable, and datasource plugins—removes legacy redundant code, enhances tracing and batch registration, and delivers extensive refactoring and bug fixes to improve stability and extensibility for cloud‑native service discovery and configuration management.
Starting with Nacos 2.2.0, you can inject multiple data source plugins via the SPI mechanism; this guide walks through adding a PostgreSQL plugin, importing the required Maven dependencies, loading the database script, configuring connection details, and setting the datasource platform in application.properties.
This article provides a comprehensive analysis of Nacos as a service registry, covering its core concepts, architecture diagram, registration and discovery principles, detailed source‑code walkthroughs, and practical debugging examples for Spring Cloud microservice environments.
The Nacos 2.2.0 release introduces major changes including removal of redundant 1.x code, new rate‑limiting, custom environment, and datasource plugins, enhanced batch registration, v2 OpenAPI, LDAP authentication, extensive refactoring, numerous bug fixes, and updated UI dependencies.
Nacos 2.2.0 introduces major enhancements such as new plugins, batch registration, OpenAPI v2, LDAP support, extensive refactoring, numerous bug fixes, and UI dependency upgrades, while outlining upgrade paths and compatibility notes for 1.x clients and servers.
This article describes the background, design, configuration, code implementation, and testing of BetterGateway—a Spring Cloud Alibaba‑based gateway that centralizes error‑code management using Nacos and dynamic refresh to enable fast, accurate exception tracing across micro‑services and third‑party interfaces.
This article explains how to implement a full-link gray (canary) release in a Spring Cloud Alibaba microservice architecture by marking traffic at the gateway, propagating the gray tag through request headers, customizing Ribbon load‑balancing, and configuring Nacos metadata for selective service routing.
HeLian Health’s journey from a fast‑iteration monolith to a stable, cloud‑native microservice architecture illustrates how modular design, Dubbo‑Nacos integration, Kubernetes, and Alibaba Cloud MSE can overcome low‑fault tolerance challenges in the medical check‑up domain while boosting release efficiency and reducing operational costs.
This article explains a permission‑bypass vulnerability in Nacos 1.4.2 caused by a specific User‑Agent header, demonstrates how to reproduce it, and provides step‑by‑step instructions for fixing the issue by upgrading to version 2.1.1 or adjusting configuration files.
This article provides a comprehensive guide to building a microservice ecosystem with Spring Cloud Alibaba, covering essential modules such as service registration, load balancing, configuration, messaging, gateway, fault tolerance, distributed transactions, tracing, and task scheduling, and showing how to integrate them with practical code examples.
This article provides a practical step‑by‑step guide to integrating Dubbo with Nacos in a Spring Boot project, covering environment setup, Maven configuration, module creation for public API, provider and consumer services, and testing the RPC call, while highlighting version compatibility and common pitfalls.
This article explains how to achieve comprehensive service governance in a microservice architecture using SpringCloud Alibaba's Nacos and Dubbo, covering service registration and discovery, load balancing, rate limiting and circuit breaking with Sentinel, configuration management, and monitoring with Prometheus and SkyWalking.
This tutorial walks through setting up a Spring Cloud Gateway integrated with Nacos as a registration and configuration center, covering Nacos installation, project configuration, route definition, and a listener that dynamically refreshes service instances to ensure reliable request forwarding.
This tutorial walks through building a simple Dubbo‑Nacos integration using Spring Boot, covering environment setup, Maven project structure, dependency management, service interface definition, provider and consumer modules, configuration files, and a test call, enabling rapid development of high‑performance Java microservices.
This tutorial provides a complete, code‑rich example of integrating Dubbo with Nacos using Spring Boot, covering environment setup, Maven project structure, module creation, configuration files, Java source code, and testing the RPC service call.
This tutorial walks through designing an OAuth2 authentication architecture, configuring Spring Boot services, setting up MySQL schemas, integrating Nacos discovery, implementing security with JWT tokens, and connecting microservices through a Spring Cloud Gateway, while demonstrating all four OAuth2 grant types with code examples.
This article demonstrates how to build a lightweight, plug‑and‑play flow‑orchestration system for microservices by installing Nacos with Docker, configuring SpringBoot services with Kafka and Nacos, and using dynamic Nacos listeners to adjust Kafka topics at runtime without redeployment.
Nacos 2.1.1 introduces beta features such as batch register service and trace events, along with numerous enhancements, refactorings, dependency updates, and extensive bug fixes, providing improved service registration, monitoring, and stability for cloud‑native applications.
This tutorial demonstrates how to set up a Spring Cloud Gateway service with static route configuration, then extend it to support dynamic routing through Nacos, and finally implement custom authentication and global filters using Java and Spring Boot.
This article explains why a configuration center is essential for microservices, introduces Nacos as a centralized solution, and provides step‑by‑step instructions with code examples for integrating Nacos into Spring Boot, managing Data IDs, namespaces, groups, and dynamic configuration refresh.
This comprehensive guide explains why a service gateway is needed in microservice architectures, details Spring Cloud Gateway's core concepts, deployment steps, route and predicate configurations, local and global filters, integration with Nacos for service discovery, dynamic routing via Apollo, and custom global exception handling, providing code examples throughout.
This article explains Nacos's architecture, the principles of service registration, how Spring Cloud integrates Nacos via auto‑configuration, the implementation of NacosServiceRegistry, heartbeat mechanisms, registration workflows, provider address queries, and the dynamic service address perception using subscription and HostReactor.
This article explains Nacos's core components, the principles of service registration and health checking, how Spring Cloud integrates Nacos via ServiceRegistry and AutoServiceRegistration, the implementation details of NacosServiceRegistry, heartbeat mechanisms, and dynamic service address discovery using HostReactor.
The guide shows how to deploy an Nginx container with Docker, configure it to proxy a custom domain to a SpringBoot microservice registered in Nacos, add a Spring Cloud Gateway upstream, and route all requests through Nginx, simplifying access and eliminating CORS issues.
This tutorial walks through replacing Ribbon with Spring Cloud LoadBalancer, showing how to configure dependencies, set up RestTemplate and OpenFeign clients, customize caching and request transformation, and verify load‑balanced calls using Nacos as the service registry.
This article explains the design, six mechanisms, and source‑code flow of Nacos’s Distro protocol, showing how asynchronous replication, periodic sync, new‑node loading, and local reads together provide AP‑style high availability and eventual consistency for service registration.
This article explains the Nacos architecture, its components, and how Spring Cloud integrates with Nacos for service registration, health checking, and dynamic service discovery, detailing the underlying mechanisms, code implementations, and the role of heartbeats in maintaining service health.
This article explains how to create a lightweight, plug‑in‑style microservice flow orchestration system using Docker‑installed Nacos for configuration, three SpringBoot services with Kafka integration, and dynamic topic management to enable hot‑swapable data pipelines without heavy frameworks.
This article explains how Nacos configuration center works, clarifies that it uses a client‑initiated pull (long‑polling) model rather than push, and walks through key client and server source code components—including cacheMap, listeners, long‑polling handling, and configuration change notification – to help developers and interviewees master its internals.
This article explains the internal long‑polling mechanism of Nacos configuration center used in Spring Cloud Alibaba, covering client‑side initialization, thread‑pool scheduling, request handling, server‑side processing, event listening, and code snippets that illustrate how configuration changes are detected and propagated.
This article compares Nacos and Apollo configuration centers, examining their security models, environment isolation mechanisms, and architectural complexity, and concludes that Nacos offers a simpler and potentially safer solution for microservice deployments.
This article provides a detailed analysis of Nacos as a service registry, covering its architecture, registration and discovery processes, health‑checking, Raft‑based consistency, Spring Cloud integration, and practical code examples for developers building micro‑service systems.
This article explains how to build a lightweight, plug‑and‑play microservice flow orchestration system using Docker‑installed Nacos, SpringBoot services with Kafka integration, and dynamic configuration listeners to adjust data pipelines without downtime.
This article demonstrates how to build a lightweight, plug‑and‑play microservice flow orchestration solution using Docker‑deployed Nacos for configuration, Kafka for streaming, and SpringBoot services, covering environment setup, service configuration, dynamic topic handling, and runtime configuration change listening.
This article explains how to create a plug‑and‑play microservice flow orchestration using Docker‑based Nacos, three SpringBoot services, and Kafka, covering installation, configuration, dynamic topic management, and runtime consumer updates for flexible data pipelines.
This article demonstrates how to build a lightweight micro‑service flow‑orchestration solution using Docker‑deployed Nacos for dynamic configuration, Spring Boot services with Kafka integration, and code examples that show installing Nacos, setting up three services, and handling runtime topic changes via Nacos listeners.
This article demonstrates how to migrate a Spring Cloud microservice architecture from Eureka to Nacos using a dual‑registration/dual‑subscription model, covering configuration changes, code adjustments, graceful shutdown, load‑balancing behavior, and step‑by‑step deployment procedures.
This article explains how to implement a custom PropertySourceLocator in Spring Cloud Alibaba, detailing the necessary spring.factories configuration, core classes like NacosConfigBootstrapConfiguration and NacosPropertySourceLocator, and the process of obtaining ConfigService, loading shared, extended, and application configurations from Nacos.
This article compares Alibaba's Nacos and Ctrip's Apollo config centers, examining their security models, architectural complexity, and practical deployment differences to determine which solution offers better safety and simplicity for various system sizes.
This article explains the purpose of a service registry in micro‑service architectures, introduces the CAP theorem, categorises registration approaches, and compares major products such as Eureka, Consul, Nacos and Zookeeper, highlighting their consistency, availability, and operational trade‑offs.
This article explains how service registration centers decouple providers and consumers in microservice architectures, discusses the CAP theorem trade‑offs, categorizes registration approaches, and compares popular solutions such as Eureka, Consul, Nacos, CoreDNS, and ZooKeeper across key features and integration aspects.
This guide explains how Nacos 2.1.0 introduces built‑in configuration encryption, how to add encryption plugins on the server, and how to mark configuration entries with a special prefix so that they are automatically stored and transmitted as ciphertext.
This article explains Nacos’s Distro consistency protocol, detailing its design principles, asynchronous replication, periodic synchronization, new‑node data loading, and local read mechanisms, and shows how these mechanisms together provide high‑availability AP consistency for service registration in a distributed cluster.
This article explains the design principles, six core mechanisms, asynchronous replication, periodic synchronization, new‑node sync, and local read strategy of Nacos's Distro consistency protocol, illustrating how AP/CP choices and the JRaft protocol ensure high availability in a distributed service registry.
This article explains the Nacos architecture, its core components, the principles of service registration and discovery, and how Spring Cloud integrates with Nacos through auto‑configuration, heartbeat mechanisms, Open API/SDK calls, and dynamic address updates.
This article explains the fundamentals of configuration centers, compares four popular solutions—Apollo, Disconf, Spring Cloud Config, and Nacos—covering their features, real‑time updates, gray releases, permission management, multi‑environment support, and performance to help you make an informed selection.
This article demonstrates how to set up a Spring Cloud Gateway service using SpringBoot 2.1, configure static routes, implement dynamic routing through Nacos configuration listening, and create a custom authentication GlobalFilter, providing a step‑by‑step guide with Maven dependencies, YAML/JSON examples, and full Java code.
This article walks through Nacos's service registration mechanism, explaining how a client assembles a registration request, selects a random node in a cluster, routes the request, processes it on the server, and ensures eventual consistency using the Distro protocol.
This article explains the Nacos architecture, the principles of service registration and discovery, and how Spring Cloud integrates with Nacos through auto‑configuration, heartbeat mechanisms, and dynamic address updates, providing a comprehensive guide for building cloud‑native microservices.
This article explains how to achieve a full‑link gray (canary) release in a Spring Cloud Alibaba microservice architecture by marking traffic at the gateway, propagating the gray tag through request headers, customizing Ribbon load‑balancing, and configuring Nacos metadata for selective service routing.
This article explains how Nacos registers services by detailing the client‑side request assembly, random node selection in a cluster, routing forwarding, and server‑side handling, while providing code snippets, diagrams, and practical tips for debugging the registration flow.
This article explains the internal architecture of Nacos, its core components, the registration principles of service instances, how Spring Cloud integrates Nacos through the ServiceRegistry interface and auto‑configuration, and the mechanisms for heartbeat, data consistency, and dynamic service discovery in a cloud‑native backend environment.
This article explains how to achieve gray (canary) release across multiple environments by using Spring Cloud LoadBalancer in Spring Cloud Gateway, configuring service metadata and request headers to route traffic to specific instances, and provides two implementation approaches with full code examples.
The Spring Cloud Alibaba 2021.0.1.0 release, built on Spring Boot 2.6.3 and Spring Cloud 2021.0.1, introduces upgraded Nacos client, RocketMQ 4.9.2 with batch and async support, Sentinel 1.8.3 enhancements for FeignClient, Spring Config import support, and a clarified version‑numbering scheme aligning with Spring Cloud.
This article explains the Nacos architecture, including its provider, consumer, name server, and server components, and details how Spring Cloud integrates with Nacos for service registration, heartbeat monitoring, and dynamic service discovery using Open API, SDK, and Raft-based consistency protocols.
This article provides a comprehensive analysis of Nacos's long‑polling mechanism, walking through the client‑side ConfigService instantiation, scheduled thread pools, request handling, and the server‑side listener workflow, while highlighting key code snippets and the event‑driven architecture that enables real‑time configuration updates.
This article provides an in-depth comparison of Nacos with other configuration and registration centers, explains its architecture and design principles, and offers detailed step-by-step instructions for deploying Nacos in standalone and cluster modes, integrating it with Spring Boot for both configuration and service discovery, including code snippets and operational tips.
This tutorial explains how to quickly set up a Spring Cloud Gateway service, configure static and Nacos‑driven dynamic routes, and implement a Redis‑backed authentication filter that validates tokens, refreshes expiration, and forwards user information to downstream services.
This article dissects Nacos 1.4.1's NamingService implementation, detailing how services are registered via HTTP, the construction of registration parameters, the heartbeat mechanism that periodically confirms instance health, and the underlying code flow, including request handling, retry logic, and task scheduling.
This article provides a step‑by‑step tutorial on integrating Nacos as a service discovery registry and dynamic configuration center for Spring Cloud microservices, covering dependency setup, server installation, service registration, configuration management, namespaces, groups, and multi‑config sets with live refresh capabilities.
This article walks through a real‑world Kubernetes outage caused by DNS and Nacos client bugs, explains the chain of failures, and presents a failure‑oriented design that adds push‑empty protection and outlier removal using Alibaba Cloud MSE to keep microservices highly available.
Learn step‑by‑step how to set up a Spring Cloud Gateway service, configure static routes, enable dynamic routing using Nacos, and implement authentication filters with Redis, providing a complete guide for building a robust backend gateway in Java.
This tutorial demonstrates how to set up a Spring Cloud Gateway service using SpringBoot 2.1, configure static and dynamic routes with Nacos, implement a custom authentication filter, and manage route updates without restarting the gateway, providing a comprehensive guide for beginners.
This article introduces Alibaba’s Nacos, tracing its origins from an internal project to an open‑source configuration service, and explains its core capabilities, basic configuration model, namespace design for multi‑tenant isolation, and provides visual diagrams to illustrate these concepts.
This tutorial demonstrates how to set up a Spring Cloud Gateway using Spring Boot 2.1, configure static and Nacos‑driven dynamic routes, and create a custom authentication GlobalFilter that validates tokens against Redis, providing a complete guide for backend developers to implement secure, flexible routing.
This tutorial explains how to create a Spring Cloud Gateway service, configure static and dynamic routing using Nacos, and implement a custom authentication filter with Redis token validation, providing a step‑by‑step guide for backend developers building cloud‑native microservice gateways.
This article explains Nacos's architecture, the principles of service registration, how Spring Cloud integrates Nacos during startup, the implementation details of NacosServiceRegistry, heartbeat mechanisms, and dynamic service address discovery, providing a comprehensive guide for building resilient microservices.
This article explains why a gateway is essential in micro‑service architectures, introduces Spring Cloud Gateway’s core concepts such as routes, predicates and filters, shows step‑by‑step setup with Maven dependencies, demonstrates custom local and global filters, and details integration with Nacos for service discovery, load‑balancing, dynamic routing and global error handling.
This article provides an in‑depth overview of mainstream distributed transaction solutions—including 2PC, 3PC, TCC, Saga, local message tables, and MQ‑based transactions—explains the theoretical foundations such as CAP and BASE, and offers a step‑by‑step tutorial for setting up Seata’s AT mode with Spring Cloud, Nacos, and MySQL.
This article examines why teams might still use Alibaba's Nacos for service registration despite Kubernetes offering built‑in discovery, weighing factors like team expertise, tooling requirements, and management granularity to help decide the most practical registry solution.
This article explains the architecture of Nacos, its core components such as Provider/Consumer apps, Name Server, Nacos Server and Console, and details how Spring Cloud integrates with Nacos for service registration, heartbeat monitoring, dynamic address discovery, and the underlying Open API/SDK mechanisms.
This article explains Nacos configuration center’s pull‑based data exchange, detailing the push vs pull models, long‑polling mechanism, core concepts like dataId, group, namespace, and provides in‑depth Java source‑code analysis of both client and server implementations.
This tutorial walks through the fundamentals of Alibaba Sentinel, covering its purpose, differences from Hystrix, version selection, dashboard installation, microservice integration, detailed flow‑control and degrade‑rule configurations, hotspot parameter limiting, system‑adaptive protection, custom block handlers, fallback handling, blacklist/whitelist setup, rule persistence with Nacos, and cluster flow‑control deployment for cloud‑native applications.
This article examines the five mainstream service registry centers—Zookeeper, Eureka, Consul, Nacos, and Kubernetes—explaining why a registry is needed, how they work, load‑balancing strategies, and provides practical criteria for choosing the most suitable solution in microservice architectures.
This article compares three popular open‑source configuration centers—Spring Cloud Config, Apollo, and Nacos—across product features, user experience, deployment, multi‑language support, migration, performance, and high‑availability to help engineers choose the most suitable solution for microservice environments.
Learn how to extend Nacos’s configuration persistence beyond Derby and MySQL by cloning the feature_multiple_datasource_support branch, compiling the source with Maven, configuring Oracle as a datasource in application.properties, and launching Nacos in standalone mode, with step‑by‑step commands and essential scripts.
This article explains Nacos as a dynamic naming and configuration service, its evolution at Alibaba, the challenges of migrating from traditional microservice architectures to service‑mesh‑based cloud‑native systems, and how Nacos supports seamless service discovery and configuration through MCP integration with Istio.
This article dissects Nacos 2.0's UDP‑based service‑instance change notification, explaining client‑side listening, UDP port registration, server‑side storage, push logic, acknowledgment handling, and current design limitations, all backed by concrete Java code snippets.
This article explains the internal architecture of Nacos, its role as a service registry in Spring Cloud, the registration and heartbeat mechanisms, and how clients dynamically discover service instances using both Open API and SDK approaches.
This article dissects Nacos client’s service subscription flow, detailing how the periodic UpdateTask triggers event registration, processes ServiceInfo, and uses NotifyCenter with DefaultPublisher to publish InstancesChangeEvent through a guarded thread and blocking queue mechanism.
This article walks through the inner workings of Nacos Config Center, detailing environment setup, dependency inclusion, client initialization, configuration loading, dynamic synchronization mechanisms, long‑polling processes, and server‑side handling, all illustrated with full source‑code snippets and explanations.
This article explains how Nacos provides service discovery via its open API, how Spring Cloud Ribbon implements client‑side load balancing, and walks through the key source code of Ribbon, LoadBalancerInterceptor, RibbonLoadBalancerClient, ZoneAwareLoadBalancer, and Nacos server‑side handling, offering practical usage tips.
This article explains the difference between Nacos temporary (ephemeral) and persistent instances, how to configure them via Spring Cloud, their impact on health‑checking and service removal, and why the protection threshold uses both modes to prevent cascade failures in high‑traffic scenarios.
This guide walks through adding the required Maven dependencies, setting up application.yml, and configuring Nacos as a dynamic data source for Alibaba Sentinel, enabling flow control rules and other rule types to be managed centrally in a Spring Cloud application.
This article explains the role of service registry centers in micro‑service architectures, outlines the CAP theorem trade‑offs, compares major solutions such as Eureka, Zookeeper, Consul, and Nacos, and discusses operational considerations like health checks, load balancing, and availability.
Version 2.0.3 of Nacos introduces extensive upgrades—including a new SPI for safe server upgrades, client retry mechanisms, UI improvements, added cluster deletion, enhanced LDAP logging, numerous refactors, and critical bug fixes—while also packaging console dependencies in Maven Central and providing a downloadable ZIP.
This guide walks through configuring Seata’s registry and configuration centers with Nacos, setting up MySQL storage, defining service modules, writing transactional code with @GlobalTransactional, and verifying rollback behavior in a Spring Boot 2.3 microservice project.
This article provides a detailed tutorial on Nacos, covering its advantages over Eureka, step‑by‑step setup for service registration and discovery, configuration management with dynamic refresh, shared configurations, persistence to MySQL, cluster deployment, and the trade‑offs between CP and AP modes in a cloud‑native microservices environment.
