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SpringCloud 周边服务学习

作者：互联网

zipkin 链路追踪

越来越多的微服务存在，他们之间也会有更加复杂的调用关系。
这个调用关系，仅仅通过观察代码，会越来越难以识别，就需要通过 zipkin 服务链路追踪服务器 这个东西来用图片进行识别各个服务的调用关系

 

 

  1.  启动zipkin-server
    java -jar zipkin-server-2.10.1-exec.jar

     

  2. pom.xml 为各个服务增加
        <!--zipkin-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zipkin</artifactId>
        </dependency>

     

  3. application.yml 为各个需要追踪的服务增加
    spring:
  application:
    name: index-codes-service

#增加 zipkin 地址
  zipkin:
    base-url: http://localhost:9411

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

     

    eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
spring:
  application:
    name: index-data-service
  zipkin:
    base-url: http://localhost:9411

     

  4. Application增加 Sampler 的Bean
    @SpringBootApplication
@EnableEurekaClient
@EnableCaching
public class IndexCodesApplication {
    public static void main(String[] args) {
         
    }
//增加Sampler的Bean
    @Bean
    public Sampler defaultSampler() {
        return Sampler.ALWAYS_SAMPLE;
    }
}
  5. 链路追踪地址
    http://localhost:9411/zipkin/dependency/

     

配置服务器 ConfigServer

  1. 创建子模块index-config-server
  2. 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>trendParentProject</artifactId>
        <groupId>cn.how2j.trend</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
 
    <artifactId>index-config-server</artifactId>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
#spring-cloud-config-server 的依赖
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-config-server</artifactId>
        </dependency>
    
    </dependencies>
</project>

     

  3. 启动类 Application 增加 @EnableConfigServer
    @SpringBootApplication
@EnableConfigServer
@EnableDiscoveryClient
@EnableEurekaClient
public class IndexConfigServerApplication {
    public static void main(String[] args) {
        new SpringApplicationBuilder(IndexConfigServerApplication.class).properties("server.port=" + port).run(args);
    }
}

     

  4. application.yml
    spring:
  application:
    name: index-config-server
  cloud:
    config:
#label 表示 分支
      label: master
      server:
        git:
#uri 表示 git 地址：
          uri: https://github.com/how2j/trendConfig/
#searchPaths 表示目录
          searchPaths: respo
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

     

     

     

  5. 更改所需要配置的服务
    pom.xml 添加对spring-cloud-starter-config 的依赖
    <!--config-client-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

    增加bootstrap.yml 把 eureka 地址信息移动到了 bootstrap.yml 里

    bootstrap.yml 和 application.yml 的区别，简单说就是前者先启动，并且一些系统方面的配置需要在 bootstrap.yml 里进行配置

    spring:
  cloud:
    config:
      label: master
      profile: dev
      discovery:
        enabled:  true
#提供了 serviceId: index-config-server, 这个是配置服务器在 eureka server 里的服务名称，这样就可以定位 config-server了
        serviceId:  index-config-server
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

     

    增加注解 @Value("${version}")  
    @Controller
public class ViewController {
    #增加了个注解来获取版本信息
    @Value("${version}")
    String version;
    @GetMapping("/")
    public String view(Model m) throws Exception {
        m.addAttribute("version", version);
        return "view";
    }
}

     

rabbitMQ 数据广播

服务业务逻辑
　　

1. 通过运行FreshConfigUtil类， 以 post 方式访问地址 http://localhost:8041/actuator/bus-refresh，通知 view:8041 刷新配置。

2. view:8041 告诉 index-config-server 获取新的配置数据

3. index-config-server 从 git 拿到数据，返回给 view:8041

4. view:8041 拿到数据不仅自己用了，还发给了 rabbitMQ

5. rabbitMQ 拿到这个数据广播给其他的，比如 view:8042

 

 

  1. 启动RabbitMQ
  2. 为view服务添加pom.xml
    <artifactId>trend-trading-backtest-view</artifactId>
    <dependencies>
#用于访问路径：/actuator/bus-refresh， 这个地址就用来通知它去更新配置服务器
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
#多了spring-cloud-starter-bus-amqp 用于支持 rabbitmq
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-bus-amqp</artifactId>
        </dependency>
    </dependencies>

     

  3. bootstrap.yml

    spring:
  cloud:
    config:
      label: master
      profile: dev
      discovery:
        enabled:  true
        serviceId:  index-config-server
#新增 but总线配置
    bus:
      enabled: true
      trace:
        enabled: true
#新增 rabbitMQ 配置
rabbitmq:
  host: localhost
  port: 5672
  username: guest
  password: guest
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/

     

  4. application.yml

    spring:
  application:
    name: trend-trading-backtest-view
  thymeleaf:
    mode: LEGACYHTML5
    encoding: UTF-8
    content-type: text/html
    cache: false
  zipkin:
    base-url: http://localhost:9411
#增加management
#其作用是允许访问：/actuator/bus-refresh
management:
  endpoints:
    web:
      exposure:
        include: "*"
      cors:
        allowed-origins: "*"
        allowed-methods: "*"

     

  5. 增加 rabbitMQ 端口判断。5672 是 rabbitMQ 服务器的端口， 15672 是 rabbitMQ 自带的某个web工具的端口

            int rabbitMQPort = 5672;
        if(NetUtil.isUsableLocalPort(rabbitMQPort)) {
            System.err.printf("检查到端口%d 未启用，判断 rabbitMQ 服务器没有启动，本服务无法使用，故退出%n", rabbitMQPort );
            System.exit(1);
        }

     

  6. 为view增加注解 @RefreshScope 表示允许刷新

    import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
  
@Controller
@RefreshScope
public class ViewController {
    @Value("${version}")
    String version;
    @GetMapping("/")
    public String view(Model m) throws Exception {
        m.addAttribute("version", version);
        return "view";
    }
}

     

  7. post访问工具

    import java.util.HashMap;  
import cn.hutool.http.HttpUtil;  
public class FreshConfigUtil {  
    public static void main(String[] args) {
        HashMap<String,String> headers =new HashMap<>();
        headers.put("Content-Type", "application/json; charset=utf-8");
        System.out.println("因为要去git获取，还要刷新index-config-server, 会比较卡，所以一般会要好几秒才能完成，请耐心等待");
  
        String result = HttpUtil.createPost("http://localhost:8041/actuator/bus-refresh").addHeaders(headers).execute().body();
        System.out.println("result:"+result);
        System.out.println("refresh 完成");
    }
}

     

  8. 对服务链路追踪的影响

    因为视图服务进行了改造，支持了 rabbitMQ, 那么在默认情况下，它的信息就不会进入 Zipkin了。 在Zipkin 里看不到视图服务的资料了。
为了解决这个问题，在启动 Zipkin 的时候 带一个参数就好了：--zipkin.collector.rabbitmq.addresses=localhost

    现在改成

    java -jar zipkin-server-2.10.1-exec.jar --zipkin.collector.rabbitmq.addresses=localhost

     

     

断路器监控 

  1. 新建子模块 index-hystrix-dashboard


  2. 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>trendParentProject</artifactId>
        <groupId>cn.how2j.trend</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
 
    <artifactId>index-hystrix-dashboard</artifactId>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</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.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        </dependency>
 
    </dependencies>
 
</project>

     

  3. 断路器监控启动器 IndexHystrixDashboardApplication
    import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.hystrix.dashboard.EnableHystrixDashboard;
import cn.hutool.core.util.NetUtil;
    
@SpringBootApplication
    //使用 @EnableHystrixDashboard 来启动断路器监控台
@EnableHystrixDashboard
public class IndexHystrixDashboardApplication {
    public static void main(String[] args) {
        int port = 8070;
        int eurekaServerPort = 8761;
        if(NetUtil.isUsableLocalPort(eurekaServerPort)) {
            System.err.printf("检查到端口%d 未启用，判断 eureka 服务器没有启动，本服务无法使用，故退出%n", eurekaServerPort );
            System.exit(1);
        }
        if(!NetUtil.isUsableLocalPort(port)) {
            System.err.printf("端口%d被占用了，无法启动%n", port );
            System.exit(1);
        }
        new SpringApplicationBuilder(IndexHystrixDashboardApplication.class).properties("server.port=" + port).run(args);
    }
}

     



  4. application.yml
    spring:
  application:
    name: index-hystrix-dashboard

     

  5. 对需要进行监控的服务进行修改
    pom.xml 增加监控接口
    <!--监控接口-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
  6. 为需要监控的服务的启动类增加注解: @EnableCircuitBreaker，用于把断路信息分享出来
    @EnableCircuitBreaker
public class TrendTradingBackTestServiceApplication {
    public static void main(String[] args) {
         new SpringApplicationBuilder(TrendTradingBackTestServiceApplication.class).properties("server.port=" + port).run(args);
    }
}

     

  7. 更改需要监控的服务的application.yml
    spring:
  application:
    name:  trend-trading-backtest-service
  zipkin:
    base-url: http://localhost:9411
feign.hystrix.enabled: true
#增加如下内容，使之可以访问
management:
  endpoints:
    web:
      exposure:
        include: "*"
      cors:
        allowed-origins: "*"
        allowed-methods: "*"

     

  8. 监控地址
    http://localhost:8070/hystrix

    输入参数

    http://localhost:8051/actuator/hystrix.stream

     

 

标签：周边,SpringCloud,springframework,server,学习,spring,org,config,cloud
来源： https://www.cnblogs.com/ideaAI/p/13830111.html