Spring Boot 2.0 + zipkin 分布式跟踪系统

注意

Spring Boot 2.0之后，使用EnableZipkinServer创建自定义的zipkin服务器已经被废弃，将无法启动
具体可看issue
Deprecates EnableZipkinServer to explain custom servers are unsupported

开始

搭建zipkin服务器

获取最新发布的zipkin服务器，一个可执行的jar

curl -sSL https://zipkin.io/quickstart.sh | bash -s

然后启动它

java -jar zipkin.jar

也可以通过docker来启动

docker run -d -p 9411:9411 openzipkin/zipkin

启动后就可以在浏览器打开http://your_host:9411/zipkin/查看了。

创建两个服务

pom.xml

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.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>
        <sleuth.version>2.0.0.RELEASE</sleuth.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.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!-- Sleuth automatically adds trace interceptors when in the classpath -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-sleuth</artifactId>
        </dependency>
        <!-- Sends trace data to zipkin over http (defaults to http://localhost:9411/api/v2/spans) -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-sleuth-zipkin</artifactId>
        </dependency>
    </dependencies>

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

Backend.java

@EnableAutoConfiguration
@RestController
public class Backend {

  @RequestMapping("/api") public String printDate() {
    return new Date().toString() + " by hongxi";
  }

  public static void main(String[] args) {
    SpringApplication.run(Backend.class,
        "--spring.application.name=backend",
        "--server.port=9000"
    );
  }
}

Frontend.java

@EnableAutoConfiguration
@RestController
@CrossOrigin // So that javascript can be hosted elsewhere
public class Frontend {

  @Autowired RestTemplate restTemplate;

  @RequestMapping("/") public String callBackend() {
    return restTemplate.getForObject("http://localhost:9000/api", String.class);
  }

  @Bean RestTemplate restTemplate() {
    return new RestTemplate();
  }

  public static void main(String[] args) {
    SpringApplication.run(Frontend.class,
        "--spring.application.name=frontend",
        "--server.port=8081"
    );
  }
}

application.properties

spring.sleuth.traceId128=true
spring.sleuth.sampler.probability=1.0

然后分别启动Backen和Frontend，在浏览器访问http://localhost:8080/，可以看到页面显示

Wed Jun 20 16:47:00 CST 2018 by hongxi

说明调用成功，然后回到http://your_host:9411/zipkin/点击大大的那个按钮“Find Traces”即可看到调用跟踪信息。

WX20180620-164932@2x.png