Spring cloud Finchley.RELEASE version 8 service link tracking Sleuth

Sleuth brief introduction

Microservice architecture divides services by services. Exposed interfaces may require many services to cooperate to complete an interface function. If any service on the link has problems, interface calls will fail. At this time, it is very difficult to find the microservices with problems. The main function of Spring Cloud Sleuth is to provide tracking solutions in distributed systems, and it is compatible with zipkin.

Sleuth Server

zipkin server does not need to build its own code. It can directly use the official one. Download address: https://dl.bintray.com/openzipkin/maven/io/zipkin/java/zipkin-server/

After downloading the jar package, you need to run the jar, java -jar zipkin-server-2.10.1-exec.jar

1. Build a service provider

Under micro parent, create a new module, micro zipkin client, add zipkin and other related dependencies. pom.xml is as follows:

<?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>
	<artifactId>micro-zuul-client</artifactId>
	<packaging>jar</packaging>
	<name>micro-zuul-client</name>
	<description>Microservice practice</description>	
	
	<parent>
		<groupId>com.sun</groupId>
		<artifactId>micro-parent</artifactId>
	    <version>0.0.1-SNAPSHOT</version>
	</parent>
	
	<dependencies>
	
	 	<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zipkin</artifactId>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

         <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
		
	</dependencies>
	
</project>

Profile:

server:
  port: 7091
spring:
  application:
    name: micro-zipkin-client
  zipkin:
    base-url: http://Localhost: 9411 ා Zipkin service address
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8080/eureka

The startup class provides an external method:

package com.sun.eureka;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
public class ZipkinApplication {

	public static void main(String[] args) {
		SpringApplication.run(ZipkinApplication.class, args);
	}
	
	@RequestMapping("/hello")
	public String hello(){
		return "hello";
	}
	
}

2. Build a service consumer

Under micro parent, create a new module, micro zipkin server, add zipkin and other related dependencies. pom.xml is as follows:

<?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>
	<artifactId>micro-zipkin-server</artifactId>
	<packaging>jar</packaging>
	<name>micro-zipkin-server</name>
	<description>Microservice practice</description>	
	
	<parent>
		<groupId>com.sun</groupId>
		<artifactId>micro-parent</artifactId>
	    <version>0.0.1-SNAPSHOT</version>
	</parent>
	
	<dependencies>
	
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

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

	</dependencies>
	
</project>

Profile:

spring:
  zipkin:
    base-url: http://Localhost: 9411 ා Zipkin server
  application:
    name: micro-zipkin-client
server:
  port: 7090
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8080/eureka

Startup class:

package com.sun.eureka;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
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 BusApplication {

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

	@Autowired
	private RestTemplate restTemplate;

	@Bean
    @LoadBalanced
	public RestTemplate getRestTemplate(){
		return new RestTemplate();
	}

	@RequestMapping("/hi")
	public String callHome(){
		return restTemplate.getForObject("http://MICRO-ZIPKIN-CLIENT/hello", String.class);
	}

}

Start mirco Eureka server, mirco Zipkin server, mirco Zipkin client; access http://localhost:7090/hi Show:

open http://localhost:9411/zipkin/

From the service name, you can see the mirco Zipkin server and mirco Zipkin client services. Click find traces to see the data of specific services calling each other