09.SpringCloud Alibaba Nacos

男娘i 2023-09-27 13:03 132阅读 0赞

## 09.SpringCloud Alibaba Nacos ##

### Nacos基础 ###

*  ##### 官网 https://github.com/alibaba/Nacos #####
 *  ##### Nacos 是什么 #####

![在这里插入图片描述][68851867d4a347828affbe33b9cc0c3e.png]

*  ##### Nacos下载运行 #####

下载地址：https://github.com/alibaba/nacos/releases/tag/1.2.1

![在这里插入图片描述][a8acce4b07dc43d197910918bb5590c8.png]

### 创建Nacos服务提供者 ###

#### 需求说明/图解 ####

![在这里插入图片描述][f43b8e75f5004708989e5c80e9d79424.png]

#### 创建 member-service-nacos-provider-10004并注册到NacosServer8848 ####

*  ##### 创建member-service-nacos-provider-10004 #####

![在这里插入图片描述][305dd6e0ce7e471cbb29be03f500b1a6.png]

*  ##### 修改本模块pom.xml #####

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <artifactId>e-commerce-center</artifactId>
            <groupId>com.hspedu.springcloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>member-service-nacos-provider-10004</artifactId>
    
        
        <dependencies>
    
    
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-nacos-discovery</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                
                <version>1.1.17</version>
            </dependency>
    
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-jdbc</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.hspedu.springcloud</groupId>
                <artifactId>e_commerce_center-common-api</artifactId>
                <version>${project.version}</version>
            </dependency>
        </dependencies>
    
        <properties>
            <maven.compiler.source>8</maven.compiler.source>
            <maven.compiler.target>8</maven.compiler.target>
        </properties>
    
    </project>

*  ##### 拷贝member-service-provider-10000 的main目录文件 #####
 *  ##### 修改application.yml #####

server:
      port: 10004
    
    spring:
      application:
        name: member-service-nacos-provider #配置应用的名称
      datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        url: jdbc:mysql://localhost:3306/e_commerce_center_db?useSSL=true&useUnicode=true&characterEncoding=UTF-8
        username: root
        password: 123456
      #配置nacos
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848 #配置 Nacos Server的地址
    #配置暴露所有的监控点
    management:
      endpoints:
        web:
          exposure:
            include: '*'
    
    mybatis:
      mapper-locations: classpath:mapper/*.xml #指定mapper.xml文件位置
      type-aliases-package: com.hspedu.springcloud.entity #实体类所在的包，这样通过类名可以引用

*  ##### 创建主启动类 #####
    
     *  @EnableDiscoveryClient 引入Nacos发现的注解

package com.hspedu.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    // @EnableDiscoveryClient 引入Nacos发现的注解
    @EnableDiscoveryClient
    @SpringBootApplication
    public class MemberNacosProviderApplication10004 {
        
    
        public static void main(String[] args) {
        
            SpringApplication.run(MemberNacosProviderApplication10004.class,args);
        }
    
    }

*  ##### 为看到更好提示，修改Controller #####

package com.hspedu.springcloud.controller;
    
    import com.hspedu.springcloud.entity.Member;
    import com.hspedu.springcloud.entity.Result;
    import com.hspedu.springcloud.service.MemberService;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.web.bind.annotation.*;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import java.util.concurrent.TimeUnit;
    
    @Slf4j
    @RestController
    public class MemberController {
        
    
        // 装配MemberService
        @Resource
        private MemberService memberService;
        // 查询接口
        @GetMapping("member/get/{id}")
        public Result getMemberById(@PathVariable("id") Long id, HttpServletRequest request) {
        
    
    //        String color = request.getParameter("color");
    //        String address = request.getParameter("address");
            // 模拟超时，休眠5秒
    //        try {
        
    //            TimeUnit.MILLISECONDS.sleep(5000);
    //        } catch (InterruptedException e) {
        
    //            e.printStackTrace();
    //        }
    
            Member member = memberService.queryMemberById(id);
            if (member != null) {
        
                return Result.success("查询会员成功 member-service-nacos-provider-10004", member);
            } else {
        
                return Result.error("402", "ID=" + id + "不存在");
            }
    
        }
    
        //编写方法，完成添加
        //老韩说明
        //1. 我们的前端如果是以json格式来发送添加信息furn， 那么我们需要使用@RequestBody
        //   , 才能将数据封装到对应的bean, 同时保证http的请求头的 content-type是对应
        //2. 如果前端是以表单形式提交了，则不需要使用@RequestBody, 才会进行对象参数封装, 同时保证
        //   http的请求头的 content-type是对应
        //3. 一会老师给小伙伴测试
        @PostMapping("member/save")
        public Result save(@RequestBody Member member) {
        
            log.info("service-provider member={}",member);
            int affected = memberService.save(member);
            if (affected > 0) {
        
                return Result.success("添加会员成功 member-service-nacos-provider-10004", affected);
            } else {
        
                return Result.error("401", "添加会员失败");
            }
        }
    
    }

*  ##### 测试 #####
    
     *  启动Nacos Server 8848
     *  启动member-service-nacos-provider-10004
     *  观察nacos服务是否注册成功
     *  浏览器 http://localhost:10004/member/get/2

#### 创建 member-service-nacos-provider-10006并注册到NacosServer8848 ####

*  ##### 创建member-service-nacos-provider-10006 #####
 *  ##### 修改本模块pom.xml #####

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <artifactId>e-commerce-center</artifactId>
            <groupId>com.hspedu.springcloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>member-service-nacos-provider-10006</artifactId>
    
        
        <dependencies>
    
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-nacos-discovery</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                
                <version>1.1.17</version>
            </dependency>
    
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-jdbc</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.hspedu.springcloud</groupId>
                <artifactId>e_commerce_center-common-api</artifactId>
                <version>${project.version}</version>
            </dependency>
        </dependencies>
    
        <properties>
            <maven.compiler.source>8</maven.compiler.source>
            <maven.compiler.target>8</maven.compiler.target>
        </properties>
    
    </project>

*  ##### 拷贝member-service-nacos-provider-10004 的main目录文件 #####
 *  ##### 修改application.yml #####

server:
      port: 10006
    
    spring:
      application:
        name: member-service-nacos-provider #配置应用的名称
      datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        url: jdbc:mysql://localhost:3306/e_commerce_center_db?useSSL=true&useUnicode=true&characterEncoding=UTF-8
        username: root
        password: 123456
      #配置nacos
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848 #配置 Nacos Server的地址
    #配置暴露所有的监控点
    management:
      endpoints:
        web:
          exposure:
            include: '*'
    
    mybatis:
      mapper-locations: classpath:mapper/*.xml #指定mapper.xml文件位置
      type-aliases-package: com.hspedu.springcloud.entity #实体类所在的包，这样通过类名可以引用

*  ##### 创建主启动类 #####

package com.hspedu.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    // @EnableDiscoveryClient 引入Nacos发现的注解
    @EnableDiscoveryClient
    @SpringBootApplication
    public class MemberNacosProviderApplication10006 {
        
    
        public static void main(String[] args) {
        
            SpringApplication.run(MemberNacosProviderApplication10006.class,args);
        }
    
    }

*  ##### 为看到更好提示，修改Controller #####

package com.hspedu.springcloud.controller;
    
    import com.hspedu.springcloud.entity.Member;
    import com.hspedu.springcloud.entity.Result;
    import com.hspedu.springcloud.service.MemberService;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.web.bind.annotation.*;
    
    import javax.annotation.Resource;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import java.util.concurrent.TimeUnit;
    
    @Slf4j
    @RestController
    public class MemberController {
        
    
        // 装配MemberService
        @Resource
        private MemberService memberService;
        // 查询接口
        @GetMapping("member/get/{id}")
        public Result getMemberById(@PathVariable("id") Long id, HttpServletRequest request) {
        
    
    //        String color = request.getParameter("color");
    //        String address = request.getParameter("address");
            // 模拟超时，休眠5秒
    //        try {
        
    //            TimeUnit.MILLISECONDS.sleep(5000);
    //        } catch (InterruptedException e) {
        
    //            e.printStackTrace();
    //        }
    
            Member member = memberService.queryMemberById(id);
            if (member != null) {
        
                return Result.success("查询会员成功 member-service-nacos-provider-10006", member);
            } else {
        
                return Result.error("402", "ID=" + id + "不存在");
            }
    
        }
    
        //编写方法，完成添加
        //老韩说明
        //1. 我们的前端如果是以json格式来发送添加信息furn， 那么我们需要使用@RequestBody
        //   , 才能将数据封装到对应的bean, 同时保证http的请求头的 content-type是对应
        //2. 如果前端是以表单形式提交了，则不需要使用@RequestBody, 才会进行对象参数封装, 同时保证
        //   http的请求头的 content-type是对应
        //3. 一会老师给小伙伴测试
        @PostMapping("member/save")
        public Result save(@RequestBody Member member) {
        
            log.info("service-provider member={}",member);
            int affected = memberService.save(member);
            if (affected > 0) {
        
                return Result.success("添加会员成功 member-service-nacos-provider-10006", affected);
            } else {
        
                return Result.error("401", "添加会员失败");
            }
        }
    
    }

*  ##### 测试 #####
    
     *  启动Nacos Server 8848
     *  启动member-service-nacos-provider-10006
     *  观察nacos服务是否注册成功
     *  浏览器 http://localhost:10006/member/get/2

### 创建Nacos服务消费者 ###

#### 需求说明/图解 ####

![在这里插入图片描述][91ef886f006b43059672ff07ee1d18d9.png]

#### 创建member-service-nacos-consumer-80 并注册到NacosServer8848 ####

*  ##### 创建member-service-nacos-consumer-80 #####
 *  ##### 修改pom.xml #####

*  ##### 创建application.yml #####

server:
      port: 81
    
    spring:
      application:
        name: member-service-nacos-consumer-80
      #配置nacos
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848 #nacos server的地址

*  ##### 创建主启动类 #####

package com.hspedu.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    @SpringBootApplication
    @EnableDiscoveryClient // 引入的是启动nacos发现注解
    public class MemberNacosConsumerApplication80 {
        
        public static void main(String[] args) {
        
            SpringApplication.run(MemberNacosConsumerApplication80.class,args);
        }
    }

*  ##### 业务类创建 #####

创建 CustomizationBean类

package com.hspedu.springcloud.config;
    
    import org.springframework.cloud.client.loadbalancer.LoadBalanced;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.client.RestTemplate;
    
    /**
     * CustomizationBean:配置类
     * 配置注入RestTemplate bean/对象
     */
    @Configuration
    public class CustomizationBean {
        
    
        // 配置注入RestTemplate bean/对象
        // 这里的@LoadBalanced 就是赋予RestTemplate 负载均衡的能力
        // 默认是使用轮询算法来访问远程调用接口
        @Bean
        @LoadBalanced
        public RestTemplate getRestTemplate(){
        
            return new RestTemplate();
        }
    
    }

创建 MemberNacosConsumerController类

package com.hspedu.springcloud.controller;
    
    import com.hspedu.springcloud.entity.Member;
    import com.hspedu.springcloud.entity.Result;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    import javax.annotation.Resource;
    
    @RestController
    @Slf4j
    public class MemberNacosConsumerController {
        
    
        //http://member-service-nacos-provider 就是注册到Nacos server 的服务名
        public static final String MEMBER_SERVICE_NACOS_PROVIDER_URL =
                "http://member-service-nacos-provider"; //后面这里地方会修改成提供服务模块的注册别名
    
        // 装配RestTemplate
        @Resource
        private RestTemplate restTemplate;
    
        // 方法/接口，根据id调用服务接口返回member对象
        @GetMapping("member/nacos/consumer/get/{id}")
        public Result getMemberById(@PathVariable("id") Long id) {
        
            return restTemplate.getForObject(MEMBER_SERVICE_NACOS_PROVIDER_URL + "/member/get/"+id,Result.class);
        }
    
        // 方法/接口 添加member对象到数据库表
        @PostMapping("member/nacos/consumer/save")
        public Result<Member> save(Member member){
        
            log.info("service-consumer member={}",member);
            // 拼接url
            // member:就是通过restTemplate 发出的post请求携带数据
            //Result.class ：返回对象类型
            return restTemplate.postForObject(MEMBER_SERVICE_NACOS_PROVIDER_URL + "/member/save", member, Result.class);
        }
    
    }

*  ##### 测试 #####

![在这里插入图片描述][a6a60ced58104e4da161f331228649c7.png]

浏览器：http://localhost:81/member/nacos/consumer/get/2

![在这里插入图片描述][907afacc7e414dd4996c04121c75e282.png]

*  ##### 配置自己的负载均衡算法，测试完毕恢复成原来的轮询算法 #####

###### 创建RibbonRule类 ######

package com.hspedu.springcloud.config;
    
    import com.netflix.loadbalancer.IRule;
    import com.netflix.loadbalancer.RandomRule;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    /**
     * 配置自己的负载均衡算法
     */
    @Configuration
    public class RibbonRule {
        
    
        // 配置注入自己的负载均衡算法
        @Bean
        public IRule myRibbonRule(){
        
            // 这里返回的是RandomRule,当然小伙伴也可以自己指定
            return new RandomRule();
        }
    }

### Nacos AP和CP切换 ###

#### 各注册中心对比 ####

![在这里插入图片描述][e2b13a89bbfc45f0b93e018a7f59810c.png]

#### 选择AP还是CP ####

![在这里插入图片描述][a80cc5006e7e4f3ca8dafe3ccbed23fd.png]

#### AP和CP切换 ####

![在这里插入图片描述][4a230e63d62442fa9dbde7e45fa8d924.png]

##### 说明 #####

![在这里插入图片描述][de1392e3be504a15be90b0f7aaf97454.png]

##### 参考 https://www.jianshu.com/p/c56e22c222bb #####

### Nacos 配置中心实例 ###

#### 需求分析/图解 ####

![在这里插入图片描述][baac11dd1c324479b9cd3e87d59b4047.png]

#### 在Nacos Server 加入配置 ####

1.  ##### 进入到Nacos Server #####
2.  ##### 加入配置，后缀名yml #####

![在这里插入图片描述][4fc2aca15dc64ced9ec4516c61e8d241.png]

##### Data ID: e-commerce-nacos-config-client-dev.yaml #####

![在这里插入图片描述][ccbfd11b6a38449f869113c19af4b510.png]

#### 创建Nacos配置客户端模块 e-commerce-nacos-config-client5000 ####

##### 创建Module #####

![在这里插入图片描述][c6376f7eea384f2babe6262a46b6266e.png]

##### 修改Pom.xml #####

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <parent>
            <artifactId>e-commerce-center</artifactId>
            <groupId>com.hspedu.springcloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>e-commerce-nacos-config-client5000</artifactId>
    
        
        <dependencies>
    
    
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
    
    
            
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
    
            
            <dependency>
                <groupId>com.hspedu.springcloud</groupId>
                <artifactId>e_commerce_center-common-api</artifactId>
                <version>${project.version}</version>
            </dependency>
        </dependencies>
    
        <properties>
            <maven.compiler.source>8</maven.compiler.source>
            <maven.compiler.target>8</maven.compiler.target>
        </properties>
    
    </project>

##### 创建application.yml #####

spring:
      profiles:
        active: dev # 指定环境，常见的环境有 dev开发/test测试/prod生产

##### 创建bootstrap.yml #####

server:
      port: 5000 # 端口
    
    spring:
      application:
        # 这里的name 需要参考nacos 配置中心的Data id
        name: e-commerce-nacos-config-client
      # 配置nacos
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848 #nacos 服务注册中心地址
          config:
            server-addr: localhost:8848 #nacos 服务配置中心地址
            file-extension: yaml # 指定yaml格式的配置
    
    # 解读
    # 1.nacos 配置客户端/当前的微服务模块，会根据配置，找到配置中心的数据(配置)
    # 2.nacos.server-addr:loocalhost:8848 可以找到配置中心
    # 3.spring.application.name 对应的是 Dataid e-commerce-nacos-config-client
    # 4.在application.yml: 配置 spring.profiles.active: dev
    # 5.spring.cloud.nacos.config.file-extension 配置文件的扩展名 .yaml
    # 6. 小结：根据配置 就是 到loocalhost:8848 下的 e-commerce-nacos-config-client-dev.yaml
    #    获取配置信息/数据
    # 7.规则就是：${spring.application.name}-${spring.profiles.active}.${spring.cloud.nacos.config.file-extension}
    #   来定位配置中心的 Data ID

##### 主启动类 #####

package com.hspedu.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    
    @SpringBootApplication
    @EnableDiscoveryClient
    public class NacosConfigClientApplication5000 {
        
    
        public static void main(String[] args) {
        
            SpringApplication.run(NacosConfigClientApplication5000.class,args);
        }
    }

##### 业务类 #####

package com.hspedu.springcloud.controller;
    
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @RestController
    @Slf4j
    public class NacosConfigClientController {
        
    
        /**
         * 1.client 会拉取nacos server 的 e-commerce-nacos-config-client-dev.yaml
         * config:
         *     ip: "122.22.22.22"
         *     name: "jiang"
         * 2.@Value("${config.ip}") 会将config.ip 赋给 configIp
         * 3.这里${config.ip}不能乱写，要有依据
         */
        @Value("${config.ip}")
        private String configIp;
    
        @Value("${config.name}")
        private String configName;
    
        @GetMapping("nacos/config/ip")
        public String getConfigIp(){
        
            return configIp;
        }
    
        @GetMapping("nacos/config/name")
        public String getConfigName(){
        
            return configName;
        }
    
    }

##### 测试 #####

###### 启动 Nacos Server ######

###### 启动 e-commerce-nacos-config-client5000 ######

###### 浏览器 http://localhost:5000/nacos/config/ip ######

##### 注意事项和细节 #####

![在这里插入图片描述][a513908e0d4549a6aa728180b013b487.png]

![在这里插入图片描述][a268868ef043405397ce70dedd797f80.png]

##### @RefreshScope 是springcloud原生注解，实现配置信息自动刷新 #####

### Nacos分类配置 ###

#### DataID方案 ####

##### 需求分析/图解 #####

![在这里插入图片描述][5cb056e471ef428da5c24af0c22fdb55.png]

##### 解决方案分析 #####

###### 使用Data ID方案解决 ######

##### 配置实现 #####

![在这里插入图片描述][432aae4e59244a189f2a21f4be4f52cc.png]

##### 修改application.yml 把active修改成test #####

spring:
      profiles:
        active: test # 指定环境，常见的环境有 dev开发/test测试/prod生产

##### 测试 #####

http://localhost:5000/nacos/config/ip  
![在这里插入图片描述][929d3c01e4d44adda990016c021546bc.png]

#### Group方案 ####

##### 需求分析/图解 #####

![在这里插入图片描述][70d517bfcf7d4cac9f5bfd4a4a0e3c16.png]

##### 解决方案分析 #####

###### 使用Group方案解决 ######

##### 配置实现 #####

###### 配置 订单订单开发微服务模块的 yaml ######

![在这里插入图片描述][4911b007167b478cb6e018cd859378f7.png]

###### 配置 秒杀微服务模块的 yaml ######

![在这里插入图片描述][42dfdc7fbd5b4d99a2f4369ff556750a.png]

##### 修改application.yml active改成dev #####

spring:
      profiles:
        active: dev # 指定环境，常见的环境有 dev开发/test测试/prod生产

##### 修改bootstrap.yml #####

###### 添加上 spring.cloud.nacos.config.group: order 指定分组 ######

##### 测试 #####

http://localhost:5000/nacos/config/ip

#### Namespace方案 ####

##### 需求分析/图解 #####

![在这里插入图片描述][48265b8c1eb341aab786fa054051170b.png]

##### 解决方案分析 #####

###### 使用Namespace方案 ######

##### 配置实现 #####

###### 添加百度公司的Namespace ######

![在这里插入图片描述][ac1995ca84be49998eafed8ee7163874.png]

###### 添加阿里公司的Namespace ######

![在这里插入图片描述][ab1e154d9cf342d4afd73f3d36ae7d3e.png]

###### 在阿里的Namespance下添加配置 ######

![在这里插入图片描述][185288f02551426c826c3b51d05c3ab1.png]  
![在这里插入图片描述][8b4c60b9519f47909a8a014f2b0bc086.png]

###### 在百度的Namespance下添加配置 ######

![在这里插入图片描述][1e2bd68e6d924745b46b58cf06281e9f.png]  
![在这里插入图片描述][b5e6241296c544bc81d4383d03c5cb97.png]

##### 修改application.yml #####

spring:
      profiles:
        active: dev # 指定环境，常见的环境有 dev开发/test测试/prod生产

##### 修改bootstrap.yml #####

###### 添加上 spring.cloud.nacos.config.namespace 指定对应的namespace ######

spring:
      application:
        # 这里的name 需要参考nacos 配置中心的Data id
        name: e-commerce-nacos-config-client
      # 配置nacos
      cloud:
        nacos:
          discovery:
            server-addr: localhost:8848 #nacos 服务注册中心地址
          config:
            server-addr: localhost:8848 #nacos 服务配置中心地址
            file-extension: yaml # 指定yaml格式的配置
            group: seckill # 指定order组的配置，默认是DEFAULT_GROUP
            namespace: 0334af75-332c-4bf0-b9a4-968827fc81e3 # 指定对应的namespace id[阿里]

##### 测试 #####

http://localhost:5000/nacos/config/ip

#### Namespace/Group/Data id 关系 ####

##### 图解 #####

![在这里插入图片描述][20d484bda5dd4677a089faf7b193c104.png]  
![在这里插入图片描述][76758b8157bc44e2b78f7d45a6cf3a71.png]

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