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服务链路追踪---Sleuth

Sleuth：日志收集工具包，封装了Dapper和log-based追踪以及Zipkin和HTrace操作，为SpringCloud应用实现了一种分布式追踪解决方案。

当服务与服务之间调用复杂时，SpringCloud Sleuth配合Zipkin提供的界面，可以直观的分析追踪数据，这篇文章介绍SpringCloud Sleuth与Zipkin配合使用。

新建Zipkin Server，加入zipkin依赖，pom文件如下：

<?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>

	<groupId>com.dalaoyang</groupId>

	<artifactId>springcloud_zipkin</artifactId>

	<version>0.0.1-SNAPSHOT</version>

	<packaging>jar</packaging>

	<name>springcloud_zipkin</name>

	<description>springcloud_zipkin</description>

	<parent>

		<groupId>org.springframework.boot</groupId>

		<artifactId>spring-boot-starter-parent</artifactId>

		<version>1.5.9.RELEASE</version>

		<relativePath/> <!-- lookup parent from repository -->

	</parent>

	<properties>

		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

		<java.version>1.8</java.version>

		<spring-cloud.version>Edgware.SR1</spring-cloud.version>

	</properties>

	<dependencies>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter</artifactId>

		</dependency>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter-test</artifactId>

			<scope>test</scope>

		</dependency>

		<dependency>

			<groupId>io.zipkin.java</groupId>

			<artifactId>zipkin-server</artifactId>

		</dependency>

		<dependency>

			<groupId>io.zipkin.java</groupId>

			<artifactId>zipkin-autoconfigure-ui</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>

配置文件只配置了一个端口号：

##端口号

server.port=9000

启动类加入注解@EnableZipkinServer，来声明是一个ZipkinServer，启动项目，可以看到控制的log已经变化了，如图

服务链路追踪---Sleuth-LMLPHP

然后在浏览器访问http://localhost:9000/zipkin/dependency/，如下图

服务链路追踪---Sleuth-LMLPHP

为了方便我们观察，分别创建了两个项目，first_service（9001），second_service（9002），pom文件加入spring-cloud-starter-zipkin依赖，

first_service（9001）pom文件代码如下：

<?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>

	<groupId>com.dalaoyang</groupId>

	<artifactId>springcloud_zipkin_firstservice</artifactId>

	<version>0.0.1-SNAPSHOT</version>

	<packaging>jar</packaging>

	<name>springcloud_zipkin_firstservice</name>

	<description>springcloud_zipkin_firstservice</description>

	<parent>

		<groupId>org.springframework.boot</groupId>

		<artifactId>spring-boot-starter-parent</artifactId>

		<version>1.5.9.RELEASE</version>

		<relativePath/> <!-- lookup parent from repository -->

	</parent>

	<properties>

		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

		<java.version>1.8</java.version>

		<spring-cloud.version>Edgware.SR1</spring-cloud.version>

	</properties>

	<dependencies>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter-web</artifactId>

		</dependency>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-devtools</artifactId>

			<scope>runtime</scope>

		</dependency>

		<dependency>

			<groupId>org.springframework.boot</groupId>

			<artifactId>spring-boot-starter-test</artifactId>

			<scope>test</scope>

		</dependency>

		<dependency>

			<groupId>org.springframework.cloud</groupId>

			<artifactId>spring-cloud-starter-zipkin</artifactId>

			<version>1.3.1.RELEASE</version>

		</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>

配置文件，其中spring.zipkin.base-url指定zipkin server地址

server.port=9001

spring.zipkin.base-url=http://localhost:9000

spring.application.name=first_service

启动类加上@RestController注解方便测试，然后新建两个方法，一个用于被调用，一个调用其他，代码如下：

package com.dalaoyang;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;

import org.springframework.context.annotation.Bean;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import org.springframework.web.client.RestTemplate;

@SpringBootApplication

@RestController

public class SpringcloudZipkinFirstserviceApplication {

	public static void main(String[] args) {

		SpringApplication.run(SpringcloudZipkinFirstserviceApplication.class, args);

	}

	@Bean

	@LoadBalanced

	RestTemplate restTemplate() {

		return new RestTemplate();

	}

	@Value("${spring.application.name}")

	String serviceName;

	@RequestMapping("/callSecond")

	public String callSecond(){

		return restTemplate().getForObject("http://localhost:9002/second", String.class);

	}

	@RequestMapping("/first")

	public String first(){

		return serviceName;

	}

}

到这里first_service（9001）代码展示完成，接下来是second_service（9002）代码，内容不在赘述，和first_service（9001）类似。

pom文件

<?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>

    <groupId>com.dalaoyang</groupId>

    <artifactId>springcloud_zipkin_secondservice</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>springcloud_zipkin_secondservice</name>

    <description>springcloud_zipkin_secondservice</description>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>1.5.9.RELEASE</version>

        <relativePath/> <!-- lookup parent from repository -->

    </parent>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

        <java.version>1.8</java.version>

        <spring-cloud.version>Edgware.SR1</spring-cloud.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-zipkin</artifactId>

            <version>1.3.1.RELEASE</version>

        </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>

配置文件：

server.port=9002

spring.zipkin.base-url=http://localhost:9000

spring.application.name=second_service

启动类：

package com.dalaoyang;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.client.loadbalancer.LoadBalanced;

import org.springframework.context.annotation.Bean;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

import org.springframework.web.client.RestTemplate;

@SpringBootApplication

@RestController

public class SpringcloudZipkinSecondserviceApplication {

	public static void main(String[] args) {

		SpringApplication.run(SpringcloudZipkinSecondserviceApplication.class, args);

	}

	@Bean

	@LoadBalanced

	RestTemplate restTemplate() {

		return new RestTemplate();

	}

	@Value("${spring.application.name}")

	String serviceName;

	@RequestMapping("/second")

	public String second(){

		return serviceName;

	}

	@RequestMapping("/callFirst")

	public String callFirst(){

		return restTemplate().getForObject("http://localhost:9001/first",String.class);

	}

}

启动这两个项目，浏览器访问http://localhost:9001/callSecond，然后观看Zipkin Server页面，可以看到调用关系，请求细节等，如下图：

服务链路追踪---Sleuth-LMLPHP

服务链路追踪---Sleuth-LMLPHP

服务链路追踪---Sleuth-LMLPHP

服务链路追踪---Sleuth-LMLPHP

源码下载 ：大老杨码云

个人网站：https://www.dalaoyang.cn

05-11 17:10
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