八、Spring Cloud Zuul

1.Zuul簡介

  Zuul包含了對請求的路由和過濾兩個最主要的功能。

  路由功能負責將外部請求轉發到具體的微服務實例上，是實現外部訪問統一入口的基礎。

  過濾器功能則負責對請求的處理過程進行干預，是實現請求校驗、服務聚合等功能的基礎。

  Zuul和Eureka進行整合，將Zuul自身註冊爲Eureka服務治理下的應用，同時從Eureka中得到其餘微服務的消息，也即之後的訪問微服務都是經過Zuul跳轉後得到。

  注：Zuul服務最終仍是會註冊進Eureka

  Zuul提供代理、路由、過濾三大功能。

https://github.com/Netflix/zuul/wiki/Getting-Started

2.Zuul配置

 

(1).建立工程

  新建Module模塊microservicecloud-zuul-gateway-9527

 

 

(2).配置pom

[1].修改部分

<!-- zuul路由網關 --> <dependency>     <groupId>org.springframework.cloud</groupId>     <artifactId>spring-cloud-starter-zuul</artifactId> </dependency> <dependency>     <groupId>org.springframework.cloud</groupId>     <artifactId>spring-cloud-starter-eureka</artifactId> </dependency>

[2].完整部分

<?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">     <parent>         <artifactId>microservicecloud</artifactId>         <groupId>com.hosystem</groupId>         <version>1.0-SNAPSHOT</version>     </parent>     <modelVersion>4.0.0</modelVersion>       <artifactId>microservicecloud-zuul-gateway-9527</artifactId>     <dependencies>         <!-- zuul路由網關 -->         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-zuul</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-eureka</artifactId>         </dependency>         <!-- actuator監控 -->         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-actuator</artifactId>         </dependency>         <!--  hystrix容錯-->         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-hystrix</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.cloud</groupId>             <artifactId>spring-cloud-starter-config</artifactId>         </dependency>         <!-- 平常標配 -->         <dependency>             <groupId>com.atguigu.springcloud</groupId>             <artifactId>microservicecloud-api</artifactId>             <version>${project.version}</version>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-jetty</artifactId>         </dependency>         <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>         </dependency>         <!-- 熱部署插件 -->         <dependency>             <groupId>org.springframework</groupId>             <artifactId>springloaded</artifactId>         </dependency>         <dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-devtools</artifactId>         </dependency>     </dependencies>   </project>

(3).applicaiton.yml

server:   port: 9527   spring:   application:     name: microservicecloud-zuul-gateway   eureka:   client:     service-url:       defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka,http://eureka7003.com:7003/eureka     instance:     instance-id: gateway-9527.com     prefer-ip-address: true     info:   app.name: hosystem-microcloud   company.name: www.hosystem.com   build.artifactId: $project.artifactId$   build.version: $project.version$

(4).修改hosts

127.0.0.1  myzuul.com

 

(5).主啓動類

  建立主啓動類Zuul_9527_StartSpringCloudApp，並添加註解@EnableZuulProxy.

package com.hosystem.springcloud;   import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.zuul.EnableZuulProxy;   @SpringBootApplication @EnableZuulProxy public class Zuul_9527_StartSpringCloudApp {     public static void main(String[] args)     {         SpringApplication.run(Zuul_9527_StartSpringCloudApp.class, args);     } }

(6).啓動項目

[1].啓動eureka700一、eureka700二、eureka7003

  啓動microservicecloud-eureka-700一、microservicecloud-eureka-700二、microservicecloud-eureka-7003

 

[2].啓動provider8001

  啓動microservicecloud-provider-dept-8001

 

[3].啓動zuul9527

  啓動microservicecloud-zuul-gateway-9527

 

(7).測試

[1].未啓用路由

http://localhost:8001/dept/get/2

 

[2].啓動路由

http://myzuul.com:9527/microservicecloud-dept/dept/get/2

 

3.Zuul路由訪問映射規則

 

(1).修改application.yml

  修改部分：

zuul:   routes:     mydept.serviceId: microservicecloud-dept     mydept.path: /mydept/**

  完整部分：

server:   port: 9527   spring:   application:     name: microservicecloud-zuul-gateway   eureka:   client:     service-url:       defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka,http://eureka7003.com:7003/eureka   instance:     instance-id: gateway-9527.com     prefer-ip-address: true   zuul:   routes:     mydept.serviceId: microservicecloud-dept     mydept.path: /mydept/**   info:   app.name: hosystem-microcloud   company.name: www.hosystem.com   build.artifactId: $project.artifactId$   build.version: $project.version$

  訪問效果

#以前訪問的時候經過'microservicecloud-dept‘ http://myzuul.com:9527/microservicecloud-dept/dept/get/2   #以後訪問的時候經過'mydept' http://myzuul.com:9527/mydept/dept/get/1

  出現的問題，經過'microservicecloud-dept‘或者'mydept'均可以訪問。如何限制只容許'mydept'訪問，而'microservicecloud-dept'訪問失敗呢？具體解決方法以下，

#解決單個的時候指定具體的servideId #若是想要解決多個的時候能夠使用   "*" zuul:   ignored-services: microservicecloud-dept   routes:     mydept.serviceId: microservicecloud-dept     mydept.path: /mydept/**

 

  統一公共前綴

zuul:   prefix: /hosystem   ignored-services: "*"   routes:     mydept.serviceId: microservicecloud-dept     mydept.path: /mydept/**

 

  完整的applicaiton.yml文件

server:   port: 9527   spring:   application:     name: microservicecloud-zuul-gateway   eureka:   client:     service-url:       defaultZone: http://eureka7001.com:7001/eureka,http://eureka7002.com:7002/eureka,http://eureka7003.com:7003/eureka   instance:     instance-id: gateway-9527.com     prefer-ip-address: true   zuul:   prefix: /hosystem   ignored-services: "*"   routes:     mydept.serviceId: microservicecloud-dept     mydept.path: /mydept/**   info:   app.name: hosystem-microcloud   company.name: www.hosystem.com   build.artifactId: $project.artifactId$   build.version: $project.version$

參考文檔：

https://github.com/Netflix/zuul/wiki/Getting-Started