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Zuul简介
Zuul的核心是一系列的过滤器,这些过滤器帮助我们完成以下功能:
微服务网关封装了应用程序的内部结构,客户端只须跟网关交互,而无须直接调用特定微服务的接口。这样,开发就可以得到简化。不仅如此,使用微服务网关还有以下优点:
- 易于监控。可在微服务网关收集监控数据并将其推送到外部系统进行分析。
- 易于认证。可在微服务网关上进行认证,然后再将请求转发到后端的微服务,而无须在每个微服务中进行认证。
- 减少了客户端与各个微服务之间的交互次数。
2.简单入门
service-zuul工程
其pom.xml文件如下:
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.forezp</groupId>
<artifactId>service-zuul</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>service-zuul</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>com.forezp</groupId>
<artifactId>sc-f-chapter5</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>
</dependencies>
</project>
在其入口applicaton类加上注解@EnableZuulProxy,开启zuul的功能:
package com.bruobuqi;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableEurekaClient
@EnableDiscoveryClient
@EnableFeignClients
@EnableZuulProxy
public class ZuulApplication {
public static void main(String[] args) {
SpringApplication.run(ZuulApplication.class, args);
}
}
加上配置文件application.yml加上以下的配置代码:
server:
port: 5000
spring:
application:
name: zuul-client
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
zuul:
routes:
api-a:
path: /apia/**
serviceId: zuul-client
api-b:
path: /apib/**
serviceId: service-feign
首先指定服务注册中心的地址为http://localhost:8761/eureka/,服务的端口为5000,服务名为zuul-client;以/apia/ 开头的请求都转发给zuul-client服务;以/apib/开头的请求都转发给service-feign服务;浏览器访问http://localhost:5000/apia/hi2?name=nihao
hi nihao ,i am from port:8763