9.1 概述
什么是zuul?
Zull包含了对请求的路由(用来跳转的)和过滤**两个最主要功能:
其中路由功能负责将外部请求转发到具体的微服务实例上,是实现外部访问统一入口的基础,而过滤器功能则负责对请求的处理过程进行干预,是实现请求校验,服务聚合等功能的基础。Zuul和Eureka进行整合,将Zuul自身注册为Eureka服务治理下的应用,同时从Eureka中获得其他服务的消息,也即以后的访问微服务都是通过Zuul跳转后得。
注意:Zuul服务最终还是会注册进Eureka
提供:代理+路由+过滤 三大功能!
Zuul能干嘛?
**
- 路由
- 过滤
官方文档:https://github.com/Netflix/zuul/
9.2 入门案例
- 新建springcloud-zuul模块,并导入依赖
**
<dependencies>
<!--zuul-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-zuul</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<!-- Hystrix依赖 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix-dashboard</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<!-- Ribbon -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-ribbon</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<!--eureka-->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
<version>1.4.7.RELEASE</version>
</dependency>
<dependency>
<groupId>nuc.ss</groupId>
<artifactId>springcloud-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
- application.yml
**
server:
port: 9527
spring:
application:
name: springcloud-zuul
eureka:
client:
service-url:
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
instance:
instance-id: zuul9527.com
prefer-ip-address: true
info:
app.name: springcloud
company.name: blog.kuangstudy.com
- application.properties
server.port=9527
spring.application.name=springcloud-zuul
#Eureka配置,服务注册到哪里
eureka.client.service-url.defaultZone=http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
eureka.instance.instance-id=zuul9527.com
eureka.instance.prefer-ip-address=true
info.app.name=gmw-springcloud
info.company.name=blog.gmw.com
#配置zuul路由
zuul.routes.mydept.service-id=springcloud-provider-dept
zuul.routes.mydept.path=/mydept/**
#忽略
#不能再使用这个路径访问了
#zuul.ignored-services=springcloud-provider-dept
#隐藏全部
zuul.ignored-services=“*”
#配置访问前缀
#设置公共的前缀
zuul.prefix=/gmw
- 编写ZuulApplication_9527启动类
@SpringBootApplication
@EnableZuulProxy
public class ZuulApplication_9527 {
public static void main(String[] args) {
SpringApplication.run(ZuulApplication_9527.class,args);
}
}
启动如下图三个服务(先去host文件里面添加www.kuangstudy.com的服务)
隐藏微服务springcloud-provider-dept的名称在地址栏,application.yml中添加配置
zuul:
routes:
mydept.serviceId: springcloud-provider-dept
mydept.path: /mydept/**
访问这个地址即可http://www.kuangstudy.com:9527/mydept/dept/get/1
但是原路径http://www.kuangstudy.com:9527/springcloud-provider-dept/dept/get/1也能访问
继续配置application.yml,原来的http://www.kuangstudy.com:9527/springcloud-provider-dept/dept/get/1不能访问了
zuul:
routes:
mydept.serviceId: springcloud-provider-dept
mydept.path: /mydept/**
ignored-services: "*" # 不能再使用某个(*:全部)路径访问了,ignored : 忽略,隐藏全部的~
继续想application添加公共的访问前缀,访问路径变为http://www.kuangstudy.com:9527/kuang/mydept/dept/get/1
zuul:
routes:
mydept.serviceId: springcloud-provider-dept
mydept.path: /mydept/**
ignored-services: "*" # 不能再使用某个(*:全部)路径访问了,ignored : 忽略,隐藏全部的~
prefix: /kuang # 设置公共的前缀,实现隐藏原有路由