dubbo服務(wù)鏈路跟蹤方式

更新時間：2021年07月26日 11:11:59 作者：燕少༒江湖

這篇文章主要介紹了dubbo服務(wù)鏈路跟蹤方式，具有很好的參考價值，希望對大家有所幫助。如有錯誤或未考慮完全的地方，望不吝賜教

目前很多業(yè)務(wù)使用微服務(wù)架構(gòu)，服務(wù)模塊劃分有這2種方式：

服務(wù)功能劃分
業(yè)務(wù)劃分

不管哪種方式，一次接口調(diào)用都需要多個服務(wù)協(xié)同完成，其中一個服務(wù)出現(xiàn)問題，都會導(dǎo)致最終失敗，雖然有l(wèi)ogback + kafka + ELK 這樣的神器架構(gòu)，但是定位問題也很麻煩，如果在整個鏈路中，可以通過一個唯一ID（traceId）跟蹤本次服務(wù)調(diào)用，就可以在ELK中查找當(dāng)前traceId來定位問題。

一、案例

1、案例結(jié)構(gòu)

pratices-demo-provider-core：定義服務(wù)接口
pratices-demo-provider：具體實現(xiàn)
pratices-demo-consumer-core：服務(wù)消費者，同時也是服務(wù)提供者
pratices-demo-consumer：具體實現(xiàn)
pratices-demo-web：提供http服務(wù)
pratices-demo-trace：本案例的核心模塊，在服務(wù)調(diào)用時攔截，設(shè)置traceId，跟蹤本次服務(wù)調(diào)用

2、pratices-demo

2.1、pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>pom</packaging>
    <modules>
        <module>pratices-demo-consumer</module>
        <module>pratices-demo-provider</module>
        <module>pratices-demo-provider-core</module>
        <module>pratices-demo-consumer-core</module>
        <module>pratices-demo-web</module>
        <module>pratices-demo-trace</module>
    </modules>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.cn.dl</groupId>
    <artifactId>pratices-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>pratices-demo</name>
    <description>Demo project for Spring Boot</description>
 
    <properties>
        <java.version>1.8</java.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-autoconfigure</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>dubbo</artifactId>
            <version>2.6.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>ch.qos.logback</groupId>
                    <artifactId>logback-core</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>ch.qos.logback</groupId>
                    <artifactId>logback-access</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>ch.qos.logback</groupId>
                    <artifactId>logback-classic</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.4.10</version>
        </dependency>
        <!--Exception in thread "main" java.lang.NoClassDefFoundError: org/I0Itec/zkclient/IZkStateListener-->
        <!--Caused by: java.lang.ClassNotFoundException: org.I0Itec.zkclient.IZkStateListener-->
        <dependency>
            <groupId>com.101tec</groupId>
            <artifactId>zkclient</artifactId>
            <version>0.10</version>
            <exclusions>
                <exclusion>
                    <artifactId>slf4j-log4j12</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
 
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>
 
</project>

3、pratices-demo-provider-core

3.1、ProviderService

package com.cn.dl;
 
/**
 * Created by yanshao on 2019-09-04.
 */
public interface ProviderService {
    String sayHello(String name);
}

4、pratices-demo-provider

4.1、ProviderServiceImpl

package com.cn.dl.provider.impl;
 
import com.alibaba.dubbo.config.annotation.Service;
import com.cn.dl.ProviderService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
 
/**
 * Created by yanshao on 2019-09-04.
 */
@Service
public class ProviderServiceImpl implements ProviderService {
 
    private static final Logger log = LoggerFactory.getLogger(ProviderServiceImpl.class);
 
    @Override
    public String sayHello(String name) {
        log.info("providerServiceImpl 服務(wù)提供 traceId:{},sayHello:{}", MDC.get("traceId"),name);
        return "hello " + name ;
    }
}

4.2、dubbo-provider.properties 配置文件

# dubbo-provider.properties
dubbo.application.name=service2
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.protocol.name=dubbo
dubbo.protocol.port=50010
dubbo.consumer.timeout=5000

4.3、ProviderMain服務(wù)啟動類

注意：啟動dubbo服務(wù)不需要暴露http服務(wù)

package com.cn.dl;
 
import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.annotation.PropertySource;
 
import java.util.concurrent.locks.LockSupport;
 
/**
 * Created by yanshao on 2019-09-04.
 */
@EnableDubbo(scanBasePackages = "com.cn.dl*")
@PropertySource("classpath:/dubbo-provider.properties")
@SpringBootApplication
public class ProviderMain{
 
    private static final Logger log = LoggerFactory.getLogger(ProviderMain.class);
    /**
     * 啟動dubbo服務(wù)，不需要提供web服務(wù)，但是默認(rèn)有8080端口，通過一下方式可以不暴露web服務(wù)
     *
     * 1、在application.properties加上一下配置
     *
     * spring:
     *   main:
     *     allow-bean-definition-overriding: true
     *     web-application-type: none
     *
     * 2、修改啟動類
     *  new SpringApplicationBuilder(ProviderMain .class)
     *                 .web(WebApplicationType.NONE)
     *                 .run(args)
     * */
    public static void main(String[] args)  {
        new SpringApplicationBuilder(ProviderMain.class).web(WebApplicationType.NONE).run(args);
        log.info("ProviderMain 啟動了");
        LockSupport.park();
    }
}

@EnableDubbo(scanBasePackages = "com.cn.dl*")

掃描Dubbo的服務(wù)提供者以及Dubbo的服務(wù)消費者，一定要注意@EnableDubbo和@SpringBootApplication的先后次序；

@PropertySource("classpath:/dubbo-provider.properties")

加載配置文件到上下文環(huán)境變量。

5、pratices-demo-consumer-core

5.1、ConsumerService

package com.cn.dl;
 
/**
 * Created by yanshao on 2019-09-04.
 */
public interface ConsumerService {
    String toSayHello(String name);
    int getRandomInt();
}

6、pratices-demo-consumer

6.1、ConsumerServiceImpl

package com.cn.dl.consumer.impl;
 
import com.alibaba.dubbo.config.annotation.Reference;
import com.alibaba.dubbo.config.annotation.Service;
import com.cn.dl.ConsumerService;
import com.cn.dl.ProviderService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
 
import java.util.Random;
 
/**
 * Created by yanshao on 2019-09-04.
 */
@Service
public class ConsumerServiceImpl implements ConsumerService {
 
    private static final Logger log = LoggerFactory.getLogger(ConsumerServiceImpl.class);
 
    @Reference
    private ProviderService providerService;
 
    @Override
    public String toSayHello(String name) {
        String sayHello = providerService.sayHello(name);
        log.info("ConsumerServiceImpl >>>> traceId:{},sayHello:{}", MDC.get("traceId"),sayHello);
        return sayHello;
    }
 
    @Override
    public int getRandomInt() {
        return new Random().nextInt(100);
    }
}

6.2、dubbo-consumer.properties

dubbo.application.name=service1
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.protocol.name=dubbo
dubbo.protocol.port=50020
dubbo.consumer.timeout=5000

6.3、ConsumerMain

package com.cn.dl;
 
import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.WebApplicationType;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.annotation.PropertySource;
 
import java.util.concurrent.locks.LockSupport;
 
/**
 * Created by yanshao on 2019-09-04.
 */
@EnableDubbo(scanBasePackages = "com.cn.dl*")
@PropertySource("classpath:/dubbo-consumer.properties")
@SpringBootApplication
public class ConsumerMain {
    public static void main(String[] args) {
        new SpringApplicationBuilder(ConsumerMain.class).web(WebApplicationType.NONE).run(args);
        LockSupport.park();
    }
}

7、pratices-demo-web

7.1、WebTraceFilter

定義web攔截器，攔截所有請求，生成唯一ID

package com.cn.dl.webTrace;
 
import com.cn.dl.utils.TraceUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
 
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
 
import static com.cn.dl.config.TraceConfig.TRACE_ID;
 
/**
 * Created by yanshao on 2019-09-04.
 */
public class WebTraceFilter implements Filter {
 
    private static final Logger log = LoggerFactory.getLogger(WebTraceFilter.class);
 
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        if (! (servletRequest instanceof HttpServletRequest) || ! (servletResponse instanceof HttpServletResponse)) {
            throw new ServletException("只支持http請求");
        }
        try {
            String traceId = TraceUtil.getTraceId();
            log.info("WebTraceFilter traceId:{}",traceId);
            MDC.put(TRACE_ID,traceId);
            filterChain.doFilter(servletRequest, servletResponse);
        } finally {
            MDC.remove(TRACE_ID);
        }
    }
}

7.2、TraceUtil

package com.cn.dl.utils;
 
import java.util.UUID;
 
/**
 * Created by yanshao on 2019-09-04.
 */
public class TraceUtil {
 
    public static String getTraceId(){
        return UUID.randomUUID().toString().replace("-","");
    }
 
    public static void main(String[] args) {
        System.out.println(getTraceId());
    }
}

7.3、TraceConfig

package com.cn.dl.config;
 
/**
 * Created by yanshao on 2019-09-04.
 */
public interface TraceConfig {
    String TRACE_ID = "traceId";
}

7.4、RpcProviderInterceptor

package com.cn.dl.rpcTrace;
 
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.extension.Activate;
import com.alibaba.dubbo.rpc.*;
import com.cn.dl.utils.TraceUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import org.springframework.util.StringUtils;
 
import java.util.Map;
 
import static com.cn.dl.config.TraceConfig.TRACE_ID;
/**
 * Created by yanshao on 2019-09-04.
 */
@Activate(group = Constants.PROVIDER)
public class RpcProviderInterceptor implements Filter {
 
    private static final Logger log = LoggerFactory.getLogger(RpcProviderInterceptor.class);
 
    @Override
    public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
        Result result;
        try {
            Map<String, String> at = invocation.getAttachments();
            MDC.put(TRACE_ID, ! StringUtils.isEmpty(at.get(TRACE_ID)) ? at.get(TRACE_ID): TraceUtil.getTraceId());
            result = invoker.invoke(invocation);
        } catch (Exception e) {
            log.error("RpcProviderInterceptor 異常",e);
            throw e;
        } finally {
            MDC.remove(TRACE_ID);
        }
        return result;
    }
}

7.5、RpcConsumerInterceptor

package com.cn.dl.rpcTrace;
 
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.extension.Activate;
import com.alibaba.dubbo.rpc.*;
import com.cn.dl.utils.TraceUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
 
import java.util.Map;
 
import static com.cn.dl.config.TraceConfig.TRACE_ID;
/**
 * Created by yanshao on 2019-09-04.
 */
@Activate(group = Constants.CONSUMER)
public class RpcConsumerInterceptor implements Filter {
 
    private static final Logger log = LoggerFactory.getLogger(RpcProviderInterceptor.class);
 
    @Override
    public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
        Result result;
        try {
            Map<String, String> at = invocation.getAttachments();
            if (MDC.get(TRACE_ID) == null) {
                MDC.put(TRACE_ID,TraceUtil.getTraceId());
            }
            at.put(TRACE_ID, MDC.get(TRACE_ID));
            result = invoker.invoke(invocation);
        }catch (Exception e){
            log.error("RpcConsumerInterceptor 異常",e);
            throw e;
        }
        return result;
    }
}

7.6、RpcProviderInterceptor

package com.cn.dl.rpcTrace;
 
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.extension.Activate;
import com.alibaba.dubbo.rpc.*;
import com.cn.dl.utils.TraceUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.slf4j.MDC;
import org.springframework.util.StringUtils;
 
import java.util.Map;
 
import static com.cn.dl.config.TraceConfig.TRACE_ID;
/**
 * Created by yanshao on 2019-09-04.
 */
@Activate(group = Constants.PROVIDER)
public class RpcProviderInterceptor implements Filter {
 
    private static final Logger log = LoggerFactory.getLogger(RpcProviderInterceptor.class);
 
    @Override
    public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
        Result result;
        try {
            Map<String, String> at = invocation.getAttachments();
            MDC.put(TRACE_ID, ! StringUtils.isEmpty(at.get(TRACE_ID)) ? at.get(TRACE_ID): TraceUtil.getTraceId());
            result = invoker.invoke(invocation);
        } catch (Exception e) {
            log.error("RpcProviderInterceptor 異常",e);
            throw e;
        } finally {
            MDC.remove(TRACE_ID);
        }
        return result;
    }
}

然后在resources下創(chuàng)建META-INF/dubbo/com.alibaba.dubbo.rpc.Filter，將擴展的攔截器添加到dubbo調(diào)用鏈中

consumerTraceFilter=com.cn.dl.rpcTrace.RpcConsumerInterceptor
providerTraceFilter=com.cn.dl.rpcTrace.RpcProviderInterceptor

8、pratices-demo-web

8.1、TraceInterceptor注冊web攔截器

package com.cn.dl.config;
 
import com.cn.dl.webTrace.WebTraceFilter;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
 
import javax.annotation.Resource;
import javax.servlet.Filter;
 
/**
 * Created by yanshao on 2019-09-04.
 */
@SpringBootConfiguration
public class TraceInterceptor {
 
    @Bean(name = "webTraceFilter")
    public WebTraceFilter getWebTraceFilter(){
       return new WebTraceFilter();
    }
 
    @Bean
    @Resource
    public FilterRegistrationBean traceFilterRegistration(Filter webTraceFilter) {
        FilterRegistrationBean<Filter> registration = new FilterRegistrationBean<>();
        registration.setFilter(webTraceFilter);
        registration.addUrlPatterns("/*");
        registration.setName("webTraceFilter");
        registration.setOrder(1);
        return registration;
    }
}

8.2、dubbo.properties

dubbo.application.name=consumer-service
dubbo.registry.address=zookeeper://127.0.0.1:2181
dubbo.consumer.timeout=5000

8.3、DemoWebController

package com.cn.dl.controller;
 
import com.alibaba.dubbo.config.annotation.Reference;
import com.cn.dl.ConsumerService;
import org.springframework.web.bind.annotation.*;
 
/**
 * Created by yanshao on 2019-09-04.
 */
@RestController
public class DemoWebController {
 
    @Reference
    private ConsumerService consumerService;
 
    @PostMapping("sayHello")
    public String sayHello(@RequestParam("name") String name){
        return consumerService.toSayHello(name);
    }
 
    @GetMapping("getRandomInt")
    public int getRandomInt(){
        return consumerService.getRandomInt();
    }
 
}

8.4、StartWeb

package com.cn.dl;
 
import com.alibaba.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.PropertySource;
 
/**
 * Created by yanshao on 2019-09-04.
 */
@EnableDubbo(scanBasePackages = "com.cn.dl*")
@PropertySource("classpath:/dubbo.properties")
@SpringBootApplication
public class StartWeb {
    public static void main(String[] args) {
        SpringApplication.run(StartWeb.class,args);
    }
}