【SpringCloud框架之Sleuth分布式请求链路跟踪】

一时失言乱红尘 2023-09-25 17:48 15阅读 0赞

本笔记内容为[尚硅谷SpringCloud][SpringCloud]框架开发Sleuth分布式请求链路跟踪部分

**目录**

一、概述

二、搭建链路监控步骤

1、zipkin

1.下载

2.运行

3.运行控制台

2、 服务提供者

3、服务消费者(调用方)

4、依次启动eureka7001/8001/80

5. 打开浏览器访问：http://localhost:9411

会出现以下界面

查看依赖关系

原理

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

# 一、概述 #

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

> 在微服务框架中，一个由客户端发起的请求在后端系统中会经过多个不同的的服务节点调用来协同产生最后的请求结果，每一个前段请求都会形成一条复杂的分布式服务调用链路，链路中的任何一环出现高延时或错误都会引起整个请求最后的失败。

![f26c87e6d6db41dfb731c42c076935d2.png][]

官网：[GitHub - spring-cloud/spring-cloud-sleuth: Distributed tracing for spring cloud][GitHub - spring-cloud_spring-cloud-sleuth_ Distributed tracing for spring cloud]

Spring Cloud Sleuth提供了一套完整的服务跟踪的解决方案

在分布式系统中提供追踪解决方案并且兼容支持了zipkin

![96ac9653d45f4dd0a02d90c0074fefb0.png][]

# 二、搭建链路监控步骤 #

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

## 1、zipkin ##

SpringCloud从F版起已不需要自己构建Zipkin Server了，只需调用jar包即可

### 1.下载 ###

地址：[Central Repository: io/zipkin/zipkin-server][Central Repository_ io_zipkin_zipkin-server]

zipkin-server-2.12.9-exec.jar

### 2.运行 ###

> java -jar zipkin-server-2.12.9-exec.jar

![674f1eb4f1df40f2b3bc0a7a798aa4fc.png][]

### 3.运行控制台 ###

[http://localhost:9411/zipkin/][http_localhost_9411_zipkin]

**完整的调用链路**

表示一请求链路，一条链路通过Trace Id唯一标识，Span标识发起的请求信息，各span通过parent id 关联起来

![e1b36db56b9b4634838d4b6191b32b08.png][]

一条链路通过Trace Id唯一标识，Span标识发起的请求信息，各span通过parent id 关联起来

![ef8650607524422383c8f5a88887ca1d.png][]

**名词解释**

Trace:类似于树结构的Span集合，表示一条调用链路，存在唯一标识

span:表示调用链路来源，通俗的理解span就是一次请求信息

## 2、 服务提供者 ##

在之前的项目cloud-provider-payment8001

**POM**

![63b2536f69b347b5b019bd29f83a3b5f.png][]

**YML**

![cef7f756c89c48bd9f0136b0ed71fc3d.png][]

server:
      port: 8001
    
    spring:
      application:
        name: cloud-payment-service
      zipkin:
        base-url: http://localhost:9411
      sleuth:
        sampler:
    
          #采样率值介于 0 到 1 之间，1 则表示全部采集
         probability: 1
      datasource:
        type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
        driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
        url: jdbc:mysql://localhost:3306/db2019?useUnicode=true&characterEncoding=utf-8&useSSL=false
        username: root
        password: 123456
    
    eureka:
      client:
        #表示是否将自己注册进EurekaServer默认为true。
        register-with-eureka: true
        #是否从EurekaServer抓取已有的注册信息，默认为true。单节点无所谓，集群必须设置为true才能配合ribbon使用负载均衡
        fetchRegistry: true
        service-url:
          #defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka  # 集群版
          defaultZone: http://localhost:7001/eureka  # 单机版
      instance:
        instance-id: payment8001
        #访问路径可以显示IP地址
        prefer-ip-address: true
        #Eureka客户端向服务端发送心跳的时间间隔，单位为秒(默认是30秒)
        lease-renewal-interval-in-seconds: 1
        #Eureka服务端在收到最后一次心跳后等待时间上限，单位为秒(默认是90秒)，超时将剔除服务
        lease-expiration-duration-in-seconds: 2
    
    
    mybatis:
      mapperLocations: classpath:mapper/*.xml
      type-aliases-package: com.atguigu.springcloud.entities    # 所有Entity别名类所在包

**业务类PaymentController**

@GetMapping("/payment/zipkin")
    public String paymentZipkin()
    {
        return "hi ,i'am paymentzipkin server fall back，welcome to atguigu，O(∩_∩)O哈哈~";
    }

## 3、服务消费者(调用方) ##

在之前的项目cloud-consumer-order80下

**POM**

![1ac9bccc6fb6452794bf3c6b2613e853.png][]

<?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>mscloud03</artifactId>
            <groupId>com.atguigu.springcloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>cloud-consumer-order80</artifactId>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            </dependency>
            
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-zipkin</artifactId>
            </dependency>
            <dependency>
                <groupId>com.atguigu.springcloud</groupId>
                <artifactId>cloud-api-commons</artifactId>
                <version>${project.version}</version>
            </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.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <scope>runtime</scope>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
    </project>

**YML**

![3c9b9c421e0a4c6899ac744475380811.png][]

server:
      port: 80
    
    spring:
        application:
            name: cloud-order-service
        zipkin:
          base-url: http://localhost:9411
        sleuth:
          sampler:
            probability: 1
    
    eureka:
      client:
        #表示是否将自己注册进EurekaServer默认为true。
        register-with-eureka: true
        #是否从EurekaServer抓取已有的注册信息，默认为true。单节点无所谓，集群必须设置为true才能配合ribbon使用负载均衡
        fetchRegistry: true
        service-url:
          #defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/
          defaultZone: http://eureka7001.com:7001/eureka

**业务类OrderController**

// ====================> zipkin+sleuth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin()
    {
        String result = restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin/", String.class);
        return result;
    }

## 4、依次启动eureka7001/8001/80 ##

80调用8001几次测试下

## 5. 打开浏览器访问：http://localhost:9411 ##

### 会出现以下界面 ###

![83bc7ec5c1684c31862348905d4a3791.png][]

### 查看依赖关系 ###

![f94711838ea94c0bada2d207de6e6186.png][]

### 原理 ###

![e5a1966790aa43a4bd1b004086ff8b7c.png][]

结束！

[SpringCloud]: https://so.csdn.net/so/search?q=%E5%B0%9A%E7%A1%85%E8%B0%B7SpringCloud&spm=1001.2101.3001.7020
[f26c87e6d6db41dfb731c42c076935d2.png]: https://img-blog.csdnimg.cn/f26c87e6d6db41dfb731c42c076935d2.png
[GitHub - spring-cloud_spring-cloud-sleuth_ Distributed tracing for spring cloud]: https://github.com/spring-cloud/spring-cloud-sleuth
[96ac9653d45f4dd0a02d90c0074fefb0.png]: https://img-blog.csdnimg.cn/96ac9653d45f4dd0a02d90c0074fefb0.png
[Central Repository_ io_zipkin_zipkin-server]: https://repo1.maven.org/maven2/io/zipkin/zipkin-server/
[674f1eb4f1df40f2b3bc0a7a798aa4fc.png]: https://img-blog.csdnimg.cn/674f1eb4f1df40f2b3bc0a7a798aa4fc.png
[http_localhost_9411_zipkin]: http://localhost:9411/zipkin/
[e1b36db56b9b4634838d4b6191b32b08.png]: https://img-blog.csdnimg.cn/e1b36db56b9b4634838d4b6191b32b08.png
[ef8650607524422383c8f5a88887ca1d.png]: https://img-blog.csdnimg.cn/ef8650607524422383c8f5a88887ca1d.png
[63b2536f69b347b5b019bd29f83a3b5f.png]: https://img-blog.csdnimg.cn/63b2536f69b347b5b019bd29f83a3b5f.png
[cef7f756c89c48bd9f0136b0ed71fc3d.png]: https://img-blog.csdnimg.cn/cef7f756c89c48bd9f0136b0ed71fc3d.png
[1ac9bccc6fb6452794bf3c6b2613e853.png]: https://img-blog.csdnimg.cn/1ac9bccc6fb6452794bf3c6b2613e853.png
[3c9b9c421e0a4c6899ac744475380811.png]: https://img-blog.csdnimg.cn/3c9b9c421e0a4c6899ac744475380811.png
[83bc7ec5c1684c31862348905d4a3791.png]: https://img-blog.csdnimg.cn/83bc7ec5c1684c31862348905d4a3791.png
[f94711838ea94c0bada2d207de6e6186.png]: https://img-blog.csdnimg.cn/f94711838ea94c0bada2d207de6e6186.png
[e5a1966790aa43a4bd1b004086ff8b7c.png]: https://img-blog.csdnimg.cn/e5a1966790aa43a4bd1b004086ff8b7c.png