参考链接：
https://blog.csdn.net/jrn1012/article/details/77837710
https://blog.csdn.net/forezp/article/details/70162074
调用链的对比
https://blog.csdn.net/u012394095/article/details/79700200

Sleuth会在每个请求的header上添加跟踪需求的重要信息，例如：
X-B3-TraceId：对应TraceID；
X-B3-SpanId：对应SpanID；
X-B3-ParentSpanId：前面一环的SpanID；
X-B3-Sampled：是否被选中抽样输出；
X-Span-Name：工作单元名称。
日志的pattern可以使用这些信息

Zipkin

（1）@EnableZipkinServer 已经废弃，不能通过自定义项目的方式来实现。可以在官网上下载独立的jar包，来单独启动。
（2）Zipkin指定数据库
新建数据zipkin
zipkin数据中导入一下脚本 SQL
新建shell脚本zipkin.sh

#!/bin/bash
java -jar zipkin-server-2.11.3-exec.jar  --STORAGE_TYPE=mysql --MYSQL_DB=zipkin --MYSQL_USER=root --MYSQL_PASS=654321 --MYSQL_HOST=localhost --MYSQL_TCP_PORT=3306

增加执行权限
chmod +x zipkin.sh
运行
./zipkin.sh
(3)zipkin集群
Zipkin + Kafka + Cassandra 集群搭建
架构图：

集群架构图

cat

cat 项目地址
参考地址：
https://github.com/dianping/cat
https://my.oschina.net/wwh/blog/1483697

官网有详细的使用说明。基本步骤：
（1）服务器端
通过mvn方式安装：

mvn clean install -DskipTests
mvn cat:install

会报错误：

[ERROR] No plugin found for prefix 'cat' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (/var/root/.m2/repository), central (http://repo1.maven.org/maven2), cat.repo (https://raw.github.com/dianping/cat/mvn-repo)] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoPluginFoundForPrefixException

搜索了多种方式，依然出错，所以采用手动安装的方式：
下载官网包放到tomcat的webapps下

建/data/目录

mkdir /data
chmod 777 /data/ -R

新建数据库配置文件 /data/appdatas/cat/datasource.xml

<?xml version="1.0" encoding="utf-8"?>

<data-sources>
    <data-source id="cat">
        <maximum-pool-size>3</maximum-pool-size>
        <connection-timeout>1s</connection-timeout>
        <idle-timeout>10m</idle-timeout>
        <statement-cache-size>1000</statement-cache-size>
        <properties>
            <driver>com.mysql.jdbc.Driver</driver>
            <url><![CDATA[jdbc:mysql://127.0.0.1:3306/cat]]></url>
            <user>root</user>
            <password></password>
            <connectionProperties><![CDATA[useUnicode=true&autoReconnect=true]]></connectionProperties>
        </properties>
    </data-source>
    <data-source id="app">
        <maximum-pool-size>3</maximum-pool-size>
        <connection-timeout>1s</connection-timeout>
        <idle-timeout>10m</idle-timeout>
        <statement-cache-size>1000</statement-cache-size>
        <properties>
            <driver>com.mysql.jdbc.Driver</driver>
            <url><![CDATA[jdbc:mysql://127.0.0.1:3306/cat]]></url>
            <user>root</user>
            <password></password>
            <connectionProperties><![CDATA[useUnicode=true&autoReconnect=true]]></connectionProperties>
        </properties>
    </data-source>
</data-sources>

/data/appdatas/cat/server.xml

<config local-mode="false" hdfs-machine="false" job-machine="true" alert-machine="false">
    
    <storage  local-base-dir="/data/appdatas/cat/bucket/" max-hdfs-storage-time="15" local-report-storage-time="7" local-logivew-storage-time="7">
    
    </storage>
    
    <console default-domain="Cat" show-cat-domain="true">
        <remote-servers>127.0.0.1:8080</remote-servers> <!--服务cat服务端地址-->
    
    </console>
        
</config>

/data/appdatas/cat/client.xml

<?xml version="1.0" encoding="utf-8"?>

<config mode="client" xmlns:xsi="http://www.w3.org/2001/XMLSchema" xsi:noNamespaceSchemaLocation="config.xsd">
    <servers>
        <server ip="127.0.0.1" port="2280" http-port="8080" />
    </servers>
</config>

启动tomcat，进入 localhost:8080

cat home

启动成功~

（2）客户端配置
windows在工程目录的盘下建文件夹：/data/appdatas/cat
添加client.xml

<?xml version="1.0" encoding="utf-8"?>

<config mode="client" xmlns:xsi="http://www.w3.org/2001/XMLSchema" xsi:noNamespaceSchemaLocation="config.xsd">
    <servers>
        <server ip="127.0.0.1" port="2280" http-port="8080" />
    </servers>
</config>

在pom.xml中增加如下依赖：

<!--dianping-->
        <dependency>
            <groupId>com.dianping.cat</groupId>
            <artifactId>cat-core</artifactId>
            <version>1.3.7</version>
        </dependency>
        <dependency>
            <groupId>com.dianping.cat</groupId>
            <artifactId>cat-client</artifactId>
            <version>1.3.8</version>
        </dependency>
        <dependency>
            <groupId>org.unidal.framework</groupId>
            <artifactId>foundation-service</artifactId>
            <version>2.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.codehaus.plexus</groupId>
            <artifactId>plexus-container-default</artifactId>
            <version>1.6</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.collections</groupId>
                    <artifactId>google-collections</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

添加测试代码：

public static void main(String[] args){
        while (true) {
            System.out.println("=== one transaction ===");
            Transaction transaction = Cat.newTransaction("MyType","UserServiceA-test");

            try{
                Cat.logEvent("URL.Server","192.168.4.5", Event.SUCCESS,"ip=192.168.4.5");
                Cat.logMetricForCount("main.count");
                Cat.logMetricForSum("main.sum",10);
                transaction.setStatus(Transaction.SUCCESS);
            }catch (Exception e){
                transaction.setStatus(e);
            }
            transaction.complete();
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

启动项目，查看CAT记录

CAT日志

（3）Springboot 集成