分布式服务跟踪SpringCloud Sleuth

- 日理万妓 2022-04-22 01:28 233阅读 0赞

## 分布式服务跟踪SpringCloud Sleuth ##

### 文章目录 ###

*   *  分布式服务跟踪SpringCloud Sleuth
     *   *  快速入门
         *  实现跟踪
         *  跟踪原理
         *  抽样收集
         *  Htttp 收集
         *   *  zipkin 搭建
             *  为应用引入和配置 Zipkin 服务
         *  消息中间件收集
         *  数据存储

### 快速入门 ###

创建 trace-1 9015

pom 依赖

<?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.zk.springcloud</groupId>
        <artifactId>springcloud-trace-1</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>springcloud-trace-1</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.6.RELEASE</version>
            <relativePath/> 
        </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>Finchley.SR2</spring-cloud.version>
        </properties>
    
        <dependencies>
            <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>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </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>

启动类

package com.zk.springcloud.springcloudtrace1;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.client.loadbalancer.LoadBalanced;
    import org.springframework.context.annotation.Bean;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    @SpringBootApplication
    @RestController
    @EnableDiscoveryClient
    public class SpringcloudTrace1Application { 
    
        @Bean
        @LoadBalanced
        RestTemplate restTemplate(){ 
            return  new RestTemplate();
        }
    
        @GetMapping(value = "/trace-1")
        public String trace(){ 
            System.out.println("===call trace-1===");
            return restTemplate().getForEntity("http://trace-2/trace-2",String.class).getBody();
        }
    
        public static void main(String[] args) { 
            SpringApplication.run(SpringcloudTrace1Application.class, args);
        }
    }

配置文件

spring.application.name=trace-1
    server.port=9015
    eureka.client.service-url.defaultZone=http://localhost:9001/eureka/,http://localhost:9004/eureka/

创建 trace-2 9016

pom 依赖同 trace-1 9015

启动类

package com.zk.springcloud.springcloudtrace2;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    @SpringBootApplication
    @RestController
    @EnableDiscoveryClient
    public class SpringcloudTrace2Application { 
    
        @GetMapping(value = "/trace-2")
        public String trace(){ 
            System.out.println("====== <call trace-2> ======");
            return "Trace";
        }
    
        public static void main(String[] args) { 
            SpringApplication.run(SpringcloudTrace2Application.class, args);
        }
    }

配置文件

spring.application.name=trace-2
    server.port=9016
    eureka.client.service-url.defaultZone=http://localhost:9001/eureka/,http://localhost:9004/eureka/

将 eureka 9001 和 eureka-1 9004 、 trace-1 、 trace-2 都启动

访问 [http://localhost:9015/trace-1][http_localhost_9015_trace-1] 返回 Trace

访问 [http://localhost:9016/trace-2][http_localhost_9016_trace-2] 返回 Trace

日志打印

trace-1 
    
    ===call trace-1===
    
    trace-2
    
    ====== <call trace-2> ======

### 实现跟踪 ###

在 trace-1 9015 、trace-2 9016 添加如下依赖

<dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-sleuth</artifactId>
        <version>1.2.5.RELEASE</version>
    </dependency>

重启后，调用 访问 [http://localhost:9015/trace-1][http_localhost_9015_trace-1] 返回 Trace

控制台打印日志：

2018-10-30 10:12:14.259  INFO [trace-1,2c3ee05efdc3793a,7bf98dfe2ca06882,false] 22288 --- [nio-9015-exec-1] c.n.l.DynamicServerListLoadBalancer      : Using serverListUpdater PollingServerListUpdater

### 跟踪原理 ###

对 trace-2 9016 输出头信息

@GetMapping(value = "/trace-2")
    public String trace(HttpServletRequest request){
        System.out.println("====== <call trace-2> ====== traceid = " + request.getHeader("X-B3-TraceId")
        + " spanid = "+ request.getHeader("X-B3-SpanId"));
        return "Trace";
    }

重启后，调用 访问 [http://localhost:9015/trace-1][http_localhost_9015_trace-1] 返回 Trace

trace-1
    
    ===call trace-1===
    2018-10-30 10:40:47.212  INFO [trace-1,79512deb9356ecad,cf672765f1dce864,false] 24248 --- [nio-9015-exec-1] s.c.a.AnnotationConfigApplicationContext : Refreshing SpringClientFactory-trace-2: startup date [Tue Oct 30 10:40:47 CST 2018]; parent: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@3224a577
    
    
    trace-2
    ====== <call trace-2> ====== traceid = 79512deb9356ecad spanid = cf672765f1dce864

### 抽样收集 ###

spring.sleuth.sampler.percentage=0.1

### Htttp 收集 ###

[zipkin地址][zipkin]

[zipkin文档地址][zipkin 1]

[spring cloud 2.0 入门系列一 （10）分布式链路追踪-Zipkin][spring cloud 2.0 _ _10_-Zipkin]

从SpringCloud2.0 以后，官方已经不支持自定义服务，官方只提供编译好的jar包供用户使用。

#### zipkin 搭建 ####

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

访问：[http://localhost:9411][http_localhost_9411] 可以看到 zipkin 界面

#### 为应用引入和配置 Zipkin 服务 ####

trace-1 9015 、 trace-2 9016 添加 zipkin 依赖 和 配置

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-zipkin</artifactId>
                <version>1.2.5.RELEASE</version>
            </dependency>

配置

# zipkin 服务地址
    spring.zipkin.base-url=http://localhost:9411
    # #样本采集量，默认为0.1，为了测试这里修改为1，正式环境一般使用默认值。
    spring.sleuth.sampler.probability=1

调用 [http://localhost:9015/trace-1][http_localhost_9015_trace-1] 可在 [http://localhost:9411/zipkin][http_localhost_9411_zipkin] 看到请求链路

### 消息中间件收集 ###

[spring boot2.0.0使用zipkin和rabbitmq进行服务链路追踪][spring boot2.0.0_zipkin_rabbitmq]

修改客户端 trace-1 和 trace-2 添加 pom 依赖

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-sleuth-stream</artifactId>
                <version>2.0.2.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-stream-rabbit</artifactId>
                <version>2.0.1.RELEASE</version>
            </dependency>

配置文件添加 rabbitmq 并将 zipkin 配置注释

# zipkin 服务地址
    #spring.zipkin.base-url=http://localhost:9411
    spring.rabbitmq.host=localhost
    spring.rabbitmq.port=5672
    spring.rabbitmq.username=springcloud
    spring.rabbitmq.password=123456

使用如下命令启动 zipkin 服务

java -jar zipkin.jar --zipkin.collector.rabbitmq.addresses=localhost --zipkin.collector.rabbitmq.username=springcloud --zipkin.collector.rabbitmq.password=123456

访问 [http://localhost:9015/trace-1][http_localhost_9015_trace-1] 再访问 [http://localhost:9411/zipkin][http_localhost_9411_zipkin] 可以看到链路追踪

### 数据存储 ###

默认情况下， Zipkin Server 会将跟踪信息存储在内存中，每次重启 Zipkin Server 都会使之前收集的跟踪信息丢失，并且当有大量跟踪信息时内存存储也会成为瓶颈

[zipkin-server 配置相关][zipkin-server]

创建数据库表 [mysql.sql 建表语句][mysql.sql]

CREATE TABLE IF NOT EXISTS zipkin_spans (
      `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit',
      `trace_id` BIGINT NOT NULL,
      `id` BIGINT NOT NULL,
      `name` VARCHAR(255) NOT NULL,
      `parent_id` BIGINT,
      `debug` BIT(1),
      `start_ts` BIGINT COMMENT 'Span.timestamp(): epoch micros used for endTs query and to implement TTL',
      `duration` BIGINT COMMENT 'Span.duration(): micros used for minDuration and maxDuration query'
    ) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;
    
    ALTER TABLE zipkin_spans ADD UNIQUE KEY(`trace_id_high`, `trace_id`, `id`) COMMENT 'ignore insert on duplicate';
    ALTER TABLE zipkin_spans ADD INDEX(`trace_id_high`, `trace_id`, `id`) COMMENT 'for joining with zipkin_annotations';
    ALTER TABLE zipkin_spans ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTracesByIds';
    ALTER TABLE zipkin_spans ADD INDEX(`name`) COMMENT 'for getTraces and getSpanNames';
    ALTER TABLE zipkin_spans ADD INDEX(`start_ts`) COMMENT 'for getTraces ordering and range';
    
    CREATE TABLE IF NOT EXISTS zipkin_annotations (
      `trace_id_high` BIGINT NOT NULL DEFAULT 0 COMMENT 'If non zero, this means the trace uses 128 bit traceIds instead of 64 bit',
      `trace_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.trace_id',
      `span_id` BIGINT NOT NULL COMMENT 'coincides with zipkin_spans.id',
      `a_key` VARCHAR(255) NOT NULL COMMENT 'BinaryAnnotation.key or Annotation.value if type == -1',
      `a_value` BLOB COMMENT 'BinaryAnnotation.value(), which must be smaller than 64KB',
      `a_type` INT NOT NULL COMMENT 'BinaryAnnotation.type() or -1 if Annotation',
      `a_timestamp` BIGINT COMMENT 'Used to implement TTL; Annotation.timestamp or zipkin_spans.timestamp',
      `endpoint_ipv4` INT COMMENT 'Null when Binary/Annotation.endpoint is null',
      `endpoint_ipv6` BINARY(16) COMMENT 'Null when Binary/Annotation.endpoint is null, or no IPv6 address',
      `endpoint_port` SMALLINT COMMENT 'Null when Binary/Annotation.endpoint is null',
      `endpoint_service_name` VARCHAR(255) COMMENT 'Null when Binary/Annotation.endpoint is null'
    ) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;
    
    ALTER TABLE zipkin_annotations ADD UNIQUE KEY(`trace_id_high`, `trace_id`, `span_id`, `a_key`, `a_timestamp`) COMMENT 'Ignore insert on duplicate';
    ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`, `span_id`) COMMENT 'for joining with zipkin_spans';
    ALTER TABLE zipkin_annotations ADD INDEX(`trace_id_high`, `trace_id`) COMMENT 'for getTraces/ByIds';
    ALTER TABLE zipkin_annotations ADD INDEX(`endpoint_service_name`) COMMENT 'for getTraces and getServiceNames';
    ALTER TABLE zipkin_annotations ADD INDEX(`a_type`) COMMENT 'for getTraces';
    ALTER TABLE zipkin_annotations ADD INDEX(`a_key`) COMMENT 'for getTraces';
    ALTER TABLE zipkin_annotations ADD INDEX(`trace_id`, `span_id`, `a_key`) COMMENT 'for dependencies job';
    
    CREATE TABLE IF NOT EXISTS zipkin_dependencies (
      `day` DATE NOT NULL,
      `parent` VARCHAR(255) NOT NULL,
      `child` VARCHAR(255) NOT NULL,
      `call_count` BIGINT,
      `error_count` BIGINT
    ) ENGINE=InnoDB ROW_FORMAT=COMPRESSED CHARACTER SET=utf8 COLLATE utf8_general_ci;
    
    ALTER TABLE zipkin_dependencies ADD UNIQUE KEY(`day`, `parent`, `child`);

用如下命令启动 zipkin server ，数据已记录在数据库

java -jar zipkin.jar --zipkin.collector.rabbitmq.addresses=localhost --zipkin.collector.rabbitmq.username=springcloud --zipkin.collector.rabbitmq.password=123456 --zipkin.storage.type=mysql --zipkin.storage.mysql.host=localhost --zipkin.storage.mysql.port=3306 --zipkin.storage.mysql.username=root --zipkin.storage.mysql.password=root --zipkin.storage.mysql.db=zipkin

[http_localhost_9015_trace-1]: http://localhost:9015/trace-1
[http_localhost_9016_trace-2]: http://localhost:9016/trace-2
[zipkin]: https://github.com/openzipkin/zipkin
[zipkin 1]: https://zipkin.io/pages/quickstart.html
[spring cloud 2.0 _ _10_-Zipkin]: https://blog.csdn.net/xiaoluo033/article/details/80961807
[http_localhost_9411]: http://localhost:9411
[http_localhost_9411_zipkin]: http://localhost:9411/zipkin
[spring boot2.0.0_zipkin_rabbitmq]: https://blog.csdn.net/weixin_37651459/article/details/80705677
[zipkin-server]: https://github.com/openzipkin/zipkin/blob/master/zipkin-server/src/main/resources/zipkin-server-shared.yml
[mysql.sql]: https://github.com/openzipkin/zipkin/blob/master/zipkin-storage/mysql-v1/src/main/resources/mysql.sql