在分布式系统中,服务跟踪(Service Tracing)是一个重要的功能,可以帮助开发者理解和分析服务之间的调用关系,定位性能瓶颈和故障点。Dubbo可以与分布式跟踪系统(如Zipkin和SkyWalking)集成,实现服务跟踪功能。以下是详细步骤和代码示例,展示如何在Dubbo中实现服务跟踪。
1. 使用Zipkin实现服务跟踪
1.1 添加依赖
在 pom.xml
中添加Zipkin相关依赖:
xml
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zipkin</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
<version>2.7.8</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>
1.2 配置Zipkin
在 application.yml
中配置Zipkin:
yaml
spring:
application:
name: dubbo-demo
zipkin:
base-url: http://localhost:9411 # Zipkin服务器地址
sender:
type: web
sleuth:
sampler:
probability: 1.0 # 采样率,1.0表示全部采样
dubbo:
application:
name: dubbo-demo
registry:
address: nacos://127.0.0.1:8848
protocol:
name: dubbo
port: 20880
1.3 定义服务接口和实现
服务接口 MyService
:
java
package com.example.dubbo;
public interface MyService {
String sayHello(String name);
}
服务实现 MyServiceImpl
:
java
package com.example.dubbo.provider;
import com.example.dubbo.MyService;
import org.apache.dubbo.config.annotation.DubboService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@DubboService
public class MyServiceImpl implements MyService {
private static final Logger logger = LoggerFactory.getLogger(MyServiceImpl.class);
@Override
public String sayHello(String name) {
logger.info("sayHello method called with name: {}", name);
return "Hello, " + name;
}
}
1.4 编写服务消费者
服务消费者 MyServiceConsumer
:
java
package com.example.dubbo.consumer;
import com.example.dubbo.MyService;
import org.apache.dubbo.config.annotation.DubboReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
@Component
public class MyServiceConsumer implements CommandLineRunner {
private static final Logger logger = LoggerFactory.getLogger(MyServiceConsumer.class);
@DubboReference
private MyService myService;
@Override
public void run(String... args) throws Exception {
String response = myService.sayHello("Dubbo");
logger.info("Response from MyService: {}", response);
}
}
1.5 配置服务消费者
在 application.yml
中配置服务消费者:
yaml
spring:
application:
name: dubbo-demo-consumer
dubbo:
application:
name: dubbo-demo-consumer
registry:
address: nacos://127.0.0.1:8848
scan:
base-packages: com.example.dubbo.consumer
1.6 启动类
服务提供者启动类 DubboProviderApplication
:
java
package com.example.dubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DubboProviderApplication {
public static void main(String[] args) {
SpringApplication.run(DubboProviderApplication.class, args);
}
}
服务消费者启动类 DubboConsumerApplication
:
java
package com.example.dubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DubboConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(DubboConsumerApplication.class, args);
}
}
1.7 启动服务并验证服务跟踪效果
- 启动Zipkin服务器:运行
java -jar zipkin.jar
。 - 启动服务提供者:运行
DubboProviderApplication
类。 - 启动服务消费者:运行
DubboConsumerApplication
类。 - 在Zipkin UI中查看服务调用链路。
2. 使用SkyWalking实现服务跟踪
2.1 添加依赖
在 pom.xml
中添加SkyWalking相关依赖:
xml
<dependency>
<groupId>org.apache.skywalking</groupId>
<artifactId>apm-toolkit-logback-1.x</artifactId>
<version>8.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.skywalking</groupId>
<artifactId>apm-toolkit-trace</artifactId>
<version>8.7.0</version>
</dependency>
<dependency>
<groupId>org.apache.skywalking</groupId>
<artifactId>apm-toolkit-opentracing</artifactId>
<version>8.7.0</version>
</dependency>
2.2 配置SkyWalking
在 application.yml
中配置SkyWalking:
yaml
skywalking:
agent:
service_name: dubbo-demo
namespace: default
collector_backend_service: localhost:11800
2.3 定义服务接口和实现
服务接口 MyService
:
java
package com.example.dubbo;
public interface MyService {
String sayHello(String name);
}
服务实现 MyServiceImpl
:
java
package com.example.dubbo.provider;
import com.example.dubbo.MyService;
import org.apache.dubbo.config.annotation.DubboService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@DubboService
public class MyServiceImpl implements MyService {
private static final Logger logger = LoggerFactory.getLogger(MyServiceImpl.class);
@Override
public String sayHello(String name) {
logger.info("sayHello method called with name: {}", name);
return "Hello, " + name;
}
}
2.4 编写服务消费者
服务消费者 MyServiceConsumer
:
java
package com.example.dubbo.consumer;
import com.example.dubbo.MyService;
import org.apache.dubbo.config.annotation.DubboReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;
@Component
public class MyServiceConsumer implements CommandLineRunner {
private static final Logger logger = LoggerFactory.getLogger(MyServiceConsumer.class);
@DubboReference
private MyService myService;
@Override
public void run(String... args) throws Exception {
String response = myService.sayHello("Dubbo");
logger.info("Response from MyService: {}", response);
}
}
2.5 配置服务消费者
在 application.yml
中配置服务消费者:
yaml
spring:
application:
name: dubbo-demo-consumer
dubbo:
application:
name: dubbo-demo-consumer
registry:
address: nacos://127.0.0.1:8848
scan:
base-packages: com.example.dubbo.consumer
2.6 启动类
服务提供者启动类 DubboProviderApplication
:
java
package com.example.dubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DubboProviderApplication {
public static void main(String[] args) {
SpringApplication.run(DubboProviderApplication.class, args);
}
}
服务消费者启动类 DubboConsumerApplication
:
java
package com.example.dubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DubboConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(DubboConsumerApplication.class, args);
}
}
2.7 启动服务并验证服务跟踪效果
- 启动SkyWalking OAP Server和UI:按照SkyWalking官方文档配置并启动。
- 启动服务提供者:运行
DubboProviderApplication
类。 - 启动服务消费者:运行
DubboConsumerApplication
类。 - 在SkyWalking UI中查看服务调用链路。
3. 代码总结
通过以上步骤,我们成功地在Dubbo中实现了服务跟踪,涵盖了以下关键步骤:
- 使用Zipkin实现服务跟踪:添加Zipkin依赖,配置Zipkin,定义服务接口和实现,编写服务消费者,启动服务并验证服务跟踪效果。
- 使用SkyWalking实现服务跟踪:添加SkyWalking依赖,配置SkyWalking,定义服务接口和实现,编写服务消费者,启动服务并验证服务跟踪效果。
通过这些步骤,可以有效地在Dubbo中实现服务跟踪,帮助开发者理解和分析服务之间的调用关系,定位性能瓶颈和故障点。