spring cloud:zipkin

zipkin-server

1. File-->new spring starter project

2.add dependency

<?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">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.smile</groupId>
    <artifactId>zipkin-server</artifactId>
    <version>0.0.1</version>
    <name>zipkin-server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
        <skipTest>true</skipTest>
    </properties>
    <dependencies>
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-server</artifactId>
            <version>2.11.8</version>
             <!--排除-->
            <exclusions>
                <exclusion>
                    <groupId>org.apache.logging.log4j</groupId>
                    <artifactId>log4j-slf4j-impl</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-autoconfigure-ui</artifactId>
            <version>2.11.8</version>
        </dependency>
        <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-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

View Code

3.Edit application.yml

server:
  port: 9000

spring:
  application:
    name: zipkin-server

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
      
#zipkin启动报错无法访问的解决方法
management:
  metrics:
    web:
      server:
        auto-time-requests: false

4.program

package com.smile;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

import zipkin2.server.internal.EnableZipkinServer;



@SpringBootApplication
@EnableZipkinServer
@EnableAutoConfiguration
@EnableEurekaClient
public class ZipkinServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(ZipkinServerApplication.class, args);
    }

}

5.Run

visit: http://localhost:9000/zipkin/

这个项目各种报错，成功踩了两个坑

【spring cloud】spring cloud集成zipkin报错：Prometheus requires that all meters with the same name have the same set of tag keys.

【maven】排除maven中jar包依赖的解决过程例子：spring cloud启动zipkin，报错maven依赖jar包冲突 Class path contains multiple SLF4J bindings.

项目添加zipkin支持

在项目producer和consumer-feign-hystrix中添加zipkin的支持。创建项目 zipkin-producer 和zipkin-consumer

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>

Spring应用在监测到Java依赖包中有sleuth和zipkin后，会自动在RestTemplate的调用过程中向HTTP请求注入追踪信息，并向Zipkin Server发送这些信息。

同时配置文件中添加如下代码：

spring:
  zipkin:
    base-url: http://localhost:9000
  sleuth:
    sampler:
      percentage: 1.0

spring.zipkin.base-url指定了Zipkin服务器的地址，spring.sleuth.sampler.percentage将采样比例设置为1.0，也就是全部都需要。

Spring Cloud Sleuth有一个Sampler策略，可以通过这个实现类来控制采样算法。采样器不会阻碍span相关id的产生，但是会对导出以及附加事件标签的相关操作造成影响。 Sleuth默认采样算法的实现是Reservoir sampling，具体的实现类是PercentageBasedSampler，默认的采样比例为: 0.1(即10%)。不过我们可以通过spring.sleuth.sampler.percentage来设置，所设置的值介于0.0到1.0之间，1.0则表示全部采集。

这两个项目添加zipkin之后，依次进行启动。