問(wèn)題背景
根據(jù)上一篇文章完成了 Gateway+FeignClient+Nacos 的初步搭建竹椒，這篇添加 Sleuth 鏈路追蹤
注意事項(xiàng)：
- 可以根據(jù)文中的代碼自己創(chuàng)建工程呻畸，也可以直接下載源碼進(jìn)行學(xué)習(xí)
- 默認(rèn)已安裝JDK
- 可以根據(jù)文章自檢創(chuàng)建工程写穴，也可以直接下載源碼進(jìn)行參考
Gateway+Nacos+Sleuth+Zipkin網(wǎng)關(guān)鏈路追蹤（測(cè)試及源碼）共苛，Gateway+FeignClient+Nacos通過(guò)網(wǎng)關(guān)遠(yuǎn)程調(diào)用微服務(wù)（一）
Gateway+Nacos+Sleuth+Zipkin網(wǎng)關(guān)鏈路追蹤（測(cè)試及源碼），Gateway+Nacos+Sleuth鏈路追蹤（二）
Gateway+Nacos+Sleuth+Zipkin網(wǎng)關(guān)鏈路追蹤（測(cè)試及源碼）仪吧，Gateway+Nacos+Zipkin安裝部署可視化http方式鏈路追蹤（三）
Gateway+Nacos+Sleuth+Zipkin網(wǎng)關(guān)鏈路追蹤（測(cè)試及源碼）庄新，Gateway+Nacos+Zipkin持久化mysql存儲(chǔ)rabbitmq消息隊(duì)列鏈路追蹤（四）
項(xiàng)目搭建
1 sleuth鏈路追蹤可以直接根據(jù)上一篇文章的代碼，再添加一個(gè)sleuth依賴
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>
整個(gè)pom如下薯鼠，service公共pom
<?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>
<groupId>com.yg</groupId>
<artifactId>sleuthTest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<modules>
<module>service1</module>
<module>service2</module>
</modules>
<name>sleuthTest</name>
<description>sleuthTest</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.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
<version>2.1.0.RELEASE</version>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
<!-- <version>2.1.0.RELEASE</version>-->
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<!--Spring Cloud-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>2.2.1.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
gateway服務(wù)的pom
<?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>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.yg</groupId>
<artifactId>gateway</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>gateway</name>
<description>gateway</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
<!-- <version>2.1.0.RELEASE</version>-->
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<!-- <scope>test</scope>-->
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
<!-- <version>2.1.0.RELEASE</version>-->
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-sleuth</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Hoxton.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>2.2.1.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
2 其他東西都不用改择诈，只需要引入依賴，現(xiàn)在新的版本logback都不用添加出皇，默認(rèn)會(huì)打印traceID和spanID
項(xiàng)目測(cè)試
1 啟動(dòng)nacos服務(wù)端羞芍，gateway，service1郊艘，service2
2 查看注冊(cè)中心http://localhost:8848/nacos荷科，密碼和賬號(hào)都為：nacos
3 使用網(wǎng)關(guān)路由調(diào)用service1微服務(wù)API唯咬，service1微服務(wù)調(diào)用service2
4 查看gateway的日志，可以看到紅框步做，gateway是微服務(wù)名副渴，后面接著是traceID和spanID
5 查看service1微服務(wù)的日志，service1微服務(wù)名全度，后面接著是traceID和spanID
6 可以從上兩張圖看到service1的traceID和gateway的traceID和spanID相同，gateway是起始調(diào)用斥滤，所以traceID和spanID相同
7 如果微服務(wù)過(guò)多将鸵，這種方式查看及其不方便，所以下一章介紹zipkin
心得
- sleuth添加非常簡(jiǎn)單佑颇，添加即用顶掉，但查看不方便，引出zipkin帶有web界面可視化
作為程序員第 19 篇文章挑胸，每次寫(xiě)一句歌詞記錄一下痒筒，看看人生有幾首歌的時(shí)間，wahahaha ...
