Spring Cloud Sleuth為Spring Cloud提供了分散式跟蹤的解決方案

Zipkin是分散式跟蹤系統，主要功能是收集系統的時序資料，從而追蹤微服務框架的系統延時等問題。

## 跟蹤方式

一種採用原生的sleuth，是http方式。zipkin是其中一種實現方式

一種採用非同步的方式，結合kafaka/rabbitmq等第三方中介軟體實現，提高效率

## 資料儲存方式

mysql

Elasticsearch

cassandra

in-momery

（每種方式依賴的jar不同）

==》使用http的方式接受訊息（zipkin）---Sleuth-server

1、新增依賴

<dependency>

<groupId>io.zipkin.java</groupId>

<artifactId>zipkin-server</artifactId>

</dependency>

<dependency>

<groupId>io.zipkin.java</groupId>

<artifactId>zipkin-autoconfigure-ui</artifactId>

<scope>runtime</scope>

</dependency>

2、啟動類添加註解 @EnableZipkinServer

3、配置檔案.yml 新增 server.port=9411

-------------------------------------------------------------------------------

微服務整合Zipkin

1、新增依賴

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-sleuth-zipkin</artifactId>

</dependency>

2、配置檔案

==》使用中介軟體接受訊息（rabbitMQ）------Sleuth-server

1、新增依賴

<!-- 採用中介軟體的形式跟蹤訊息 -->

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-sleuth-zipkin-stream</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-stream-rabbit</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-sleuth</artifactId>

</dependency>

<dependency>

<groupId>io.zipkin.java</groupId>

<artifactId>zipkin-autoconfigure-ui</artifactId>

<scope>runtime</scope>

</dependency>

2、啟動類中添加註解 @EnableZipkinStreamServer

3、修改配置檔案

server.port=9411

#rabbit config

spring.rabbitmq.host=localhost

spring.rabbitmq.port=5672

spring.rabbitmq.username=guest

spring.rabbitmq.password=guest

-------------------------------------------------------------------------------

微服務整合中介軟體（XXXX-service）

1、新增依賴

<!-- 採用中介軟體來接受收集跟蹤訊息 -->

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-sleuth</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-sleuth-stream</artifactId>

</dependency>

<dependency>

<groupId>org.springframework.cloud</groupId>

<artifactId>spring-cloud-starter-stream-rabbit</artifactId>

</dependency>

2、配置檔案

spring.rabbitmq.host=localhost

spring.rabbitmq.port=5672

spring.rabbitmq.username=guest

spring.rabbitmq.password=guest

=======================================================================

==》儲存跟蹤資料（mysql、Elasticsearch、cassandra、in-momery等）---Sleuth-server

1、新增依賴

<!--儲存到資料庫需要如下依賴 不同的後端儲存對應相應的依賴 -->

<!-- MySql -->

<dependency>

<groupId>io.zipkin.java</groupId>

<artifactId>zipkin-autoconfigure-storage-mysql</artifactId>

</dependency>

<!-- Elasticsearch -->

<dependency>

<groupId>io.zipkin.java</groupId> -

<artifactId>zipkin-autoconfigure-storage-elasticsearch-http</artifactId>

<version>1.24.0</version>

<optional>true</optional>

</dependency>

<!-- cassandra-->

<dependency>

<groupId>io.zipkin.java</groupId>

<artifactId>zipkin-storage-cassandra</artifactId>

<version>${zipkin.version}</version>

<scope>test</scope>

</dependency>

2、配置檔案中新增：

#elasticsearch config

#將跟蹤資料儲存到Elasticsearch中

zipkin.storage.type=elasticsearch

zipkin.storage.elasticsearch.hosts=127.0.0.1:9200

zipkin.storage.elasticsearch.cluster=elasticsearch

zipkin.storage.elasticsearch.index=zipkin

zipkin.storage.elasticsearch.index-shards=5

zipkin.storage.elasticsearch.index-replicas=1

#mysql config

#將跟蹤資料儲存到Mysql中

zipkin.storage.type=mysql

spring.datasource.schema=classpath:/mysql.sql

spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/test

spring.datasource.username=root

spring.datasource.password=123456

spring.datasource.initialize=true

spring.datasource.continueOnError=true

spring.sleuth.enabled=false