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Spring Cloud 从入门到精通（一）Nacos 服务中心初探

時間：2021-07-29 16:20:16 阅读：0 評論：0 收藏：0 [點我收藏+]

標簽：img 跳過 distrib 64位 lease 注冊 conf 內網管理

什麽是Nacos？

Nacos是阿里巴巴开源的项目，是一个更易于帮助构建云原生应用的动态服务发现、配置管理和服务管理平台。英文全称 Dynamic Naming and Configuration Service，Na为naming/nameServer即注冊中心,co为configuration即注冊中心，service是指该注冊/配置中心都是以服务为核心。

Nacos功能介紹

1、动态配置服务：动态配置服务让您能够以中心化、外部化和动态化的方式管理所有环境的配置。动态配置消除了配置变更时重新部署应用和服务的需要。配置中心化管理让实现无状态服务更简单，也让按需弹性扩展服务更容易。2、服务发现及管理：动态服务发现对以服务为中心的（例如微服务和云原生）应用架构方式非常关键。Nacos支持DNS-Based和RPC-Based（Dubbo、gRPC）模式的服务发现。Nacos也提供实时健康检查，以防止将请求发往不健康的主机或服务实例。借助Nacos，您可以更容易地为您的服务实现断路器。3、动态DNS服务：通过支持权重路由，动态DNS服务能让您轻松实现中间层负载均衡、更灵活的路由策略、流量控制以及简单数据中心內網的简单DNS解析服务。动态DNS服务还能让您更容易地实现以DNS协议为基础的服务发现，以消除耦合到厂商私有服务发现API上的风险。

爲什麽選擇Nacos？

1、易于使用：动态配置管理、服务发现和动态的一站式解决方案；20多种开箱即用的以服务为中心的架构特性；基本符合生产要求的轻量级易用控制台。2、更适应云架构：无缝支持Kubernetes和Spring Cloud；在主流公共云上更容易部署和运行（例如阿裏雲和AWS）；多租户和多环境支持。3、生产等级：脱胎于历经阿里巴巴10年生产验证的内部产品；支持具有数百万服务的大规模场景；具备企业级SLA的开源产品。

4、豐富的應用場景：支持限流、大促銷預案和異地多活；直接支持或稍作擴展即可支持大量有用的互聯網應用場景；流量調度和服務治理。

准備環境

在開始之前，請安裝以下組件（官方推薦）：

64位操作系統：支持Linux/Unix/Mac/Windows，建議使用Linux/Unix/Mac（本次演示在Windows系統）。
64位JDK 1.8版本及以上。
Maven 3.2.x版本及以上。

下載源碼或者安裝包

Nacos可以通過源碼或者發行包兩種方式下載。

1）從Github下載源代碼

git clone https://github.com/alibaba/nacos.git
cd nacos/
mvn -Prelease-nacos -Dmaven.test.skip=true clean install -U  
ls -al distribution/target/
 
// change the $version to your actual path
cd distribution/target/nacos-server-$version/nacos/bin

2）下載編譯後壓縮包方式

https://github.com/alibaba/nacos/releases

建議選擇穩定版本（將$version替換成版本號）：

unzip nacos-server-$version.zip  OR tar -xvf nacos-server-$version.tar.gz
cd nacos/bin

Windows版本直接使用解壓工具即可。

启动Nacos Server服务

Linux/Unix/Mac操作系統，執行命令如下：

sh startup.sh -m standalone

如果使用的是ubuntu系統，或遇到此錯誤消息（找不到符號），請嘗試方式運行：

bash startup.sh -m standalone

Windows 操作系统，执行命令如下：

cmd startup.cmd

技术图片

服务与配置管理nacos server访问地址：http://127.0.0.1:8848/nacos/nacos默认账户密码：nacos/nacos

1、服务注冊在控制台中手动添加配置信息如下：

curl -X POST "http://127.0.0.1:8848/nacos/v1/ns/instance?serviceName=blog.yoodb.com&ip=123.57.47.154&port=443"

參考如圖所示：

技术图片

技术图片

參數含義

服務名:blog.yoodb.com
保護阈值:0
分組（默認）:DEFAULT_GROUP

2、服务发现参考服务注冊此步跳過

curl -X GET "http://127.0.0.1:8848/nacos/v1/ns/instance/list?serviceName=blog.yoodb.com"

3、發布配置

在命令行执行如下命令，向Nacos Server中添加一条配置，也可在控制台中手动添加。

curl -X POST "http://127.0.0.1:8848/nacos/v1/cs/configs?dataId=blog.yoodb.com&group=TEXT_GROUP&content=helloWorld"

參考如圖所示：

技术图片

參數含義

dataId:blog.yoodb.com
group:TEXT_GROUP
配置內容:helloWorld

4、获取配置参考发布配置此步跳過。

curl -X GET "http://127.0.0.1:8848/nacos/v1/cs/configs?dataId=blog.yoodb.com&group=TEXT_GROUP"

Spring Cloud 从入门到精通（一）Nacos 服务中心初探

標簽：img 跳過 distrib 64位 lease 注冊 conf 內網管理

原文地址：https://www.cnblogs.com/MrYoodb/p/15073639.html

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