SpringCloudAlibaba 2021.0.5.0 集成Nacos2.2.0 集群配置中心使用记录

素颜马尾好姑娘i 2024-03-24 10:48 4阅读 0赞

> Nacos2.2.0集群配置中心使用记录,踩过太多坑  
> [Nacos2.2.0集群搭建参考][Nacos2.2.0]

### 1. Nacos配置中心使用 ###

官方文档： [https://github.com/alibaba/springcloudalibaba/wiki/Nacosconfig][https_github.com_alibaba_springcloudalibaba_wiki_Nacosconfig]

### 1.1 准备配置 ###

![新建][bc63755c9dcf4ee793344e4d79e83c8c.png]  
**新建配置**

config:
        name: coisini
    server:
      port: 9420

![yaml配置][yaml]

> DataId：每个项目下有若干个微服务，每个配置集(DataId)是一个微服务的主配置文件  
> Group：代表某项目  
> Namespace：代表不同环境，如开发、测试、生产环境。

### 1.2 搭建nacos-config服务 ###

**1）引入依赖：**  
SpringCloud对应版本 [https://github.com/alibaba/spring-cloud-alibaba/wiki/版本说明][https_github.com_alibaba_spring-cloud-alibaba_wiki]  
![版本][10e2fe77d0b9400bade30a73723c4964.png]  
![配置][4a903d6746a640449f22e54f7ea894c1.png]

<dependency>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-parent</artifactId>
                    <version>2.6.13</version>
                    <type>pom</type>
                </dependency>
                
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>2021.0.5</version>
                </dependency>
                
                <dependency>
                    <groupId>com.alibaba.cloud</groupId>
                    <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                    <version>2021.0.5.0</version>
                </dependency>
    
         
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            </dependency>
             
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-bootstrap</artifactId>
            </dependency>

**2）项目添加`application.yml` `bootstrap.yml`文件**

--------------------

application.yml

server:
      port: ${
        server.port}

--------------------

bootstrap.yml

spring:
        # 配置中心地址
      application:
        # 服务名称
        name: admin
      # 环境配置 例如 admin-dev.yaml
      #profiles:
      #  active: dev
      cloud:
        nacos:
          discovery:
            # 开启nacos作为服务注册中心，默认值：true
            enabled: true
            # nacos集群服务注册地址
            server-addr: 192.168.20.128:8999
            # nacos用户名
            username: nacos
            # nacos密码
            password: nacos
            # 命名空间，默认 public,可设置dev,pro等，相同特征的服务分类，先去nacos命名空间创建
            # namespace: public
            # 分组，默认 DEFAULT_GROUP 相同特征的服务划分的更细
            group: DEFAULT_GROUP
            # 临时实例，默认true，false永久实例，即使宕机也不会从nacos服务中删除,可应对雪崩保护，避免服务被删除
            ephemeral: true
            # 权重 1-100 数值越大权重越大分配的流量就越大，通常结合权重负载均衡策略
            weight: 100
          config:
            server-addr: ${
        spring.cloud.nacos.discovery.server-addr}
            username: ${
        spring.cloud.nacos.discovery.username}
            password: ${
        spring.cloud.nacos.discovery.password}
            # dataid为yaml的文件扩展名配置方式 ${spring.application.name}.${file‐extension:properties}
            file-extension: yaml
            # namespace:
            group: DEFAULT_GROUP
            context-path: /nacos
            # 共享配置
            #shared-configs:
            #  - application-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}

**3) 测试微服务是否使用配置中心的配置**  
**启动类：**

@SpringBootApplication
    // 服务注册发现
    @EnableDiscoveryClient
     //开启 OpenFeign 功能
    @EnableFeignClients
    public class AdminApplication {
        
        public static void main(String[] args) throws InterruptedException {
        
            ConfigurableApplicationContext applicationContext = SpringApplication.run(AdminApplication.class, args);
            while (true) {
        
                String name = applicationContext.getEnvironment().getProperty("config.name");
                String post = applicationContext.getEnvironment().getProperty("server.port");
                System.out.println("name :"+name);
                System.out.println("post :"+post);
                // 每一秒加载一次，查询注册中心配置是否变更
                TimeUnit.SECONDS.sleep(2);
            }
        }
    }

**新建controller 测试能否获取config.name值**

@RestController
    // 当前类下的配置支持动态更新
    @RefreshScope
    @RequestMapping("/api/admin")
    public class CsController {
        
        @Value("${config.name}")
        String name;
    
        @GetMapping("/cs")
        public String cs() {
        
            return name;
        }
    }

**启动测试：**  
![测试][9691c480055547e383d471feac61f5f7.png]  
![测试][75ba9509e82e41c49be891265f3c5112.png]  
![服务][f65c8d31277b4b8da6b464bcfe1200ba.png]

--------------------

搞定，感谢阅览~  
END

--------------------

[Nacos2.2.0]: https://blog.csdn.net/qq_44870331/article/details/129756751
[https_github.com_alibaba_springcloudalibaba_wiki_Nacosconfig]: https://github.com/alibaba/spring%C2%ADcloud%C2%ADalibaba/wiki/Nacos%C2%ADconfig
[bc63755c9dcf4ee793344e4d79e83c8c.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/dc559b28694f42028f267bcd0fc45f0c.png
[yaml]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/fed3dc40094746edbcafe6b385824d78.png
[https_github.com_alibaba_spring-cloud-alibaba_wiki]: https://github.com/alibaba/spring-cloud-alibaba/wiki/%E7%89%88%E6%9C%AC%E8%AF%B4%E6%98%8E
[10e2fe77d0b9400bade30a73723c4964.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/47fac50dd45a484290bc0ae2632e4d98.png
[4a903d6746a640449f22e54f7ea894c1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/54caf59c6fd848d79652fa4d36bbd0b5.png
[9691c480055547e383d471feac61f5f7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/c566ed65b0f047e293a620192b06cd04.png
[75ba9509e82e41c49be891265f3c5112.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/2638f1b6d8b84b41b734910311e2752d.png
[f65c8d31277b4b8da6b464bcfe1200ba.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/24/990c2eead504487893feb52414431cbc.png