SpringCloud之網關 Zuul(四)

 

一 Zuul簡介html

zuul 是netflix開源的一個API Gateway 服務器, 本質上是一個web servlet應用。java

Zuul 在雲平臺上提供動態路由,監控,彈性,安全等邊緣服務的框架。Zuul 至關因而設備和 Netflix 流應用的 Web 網站後端全部請求的前門。git

zuul的例子能夠參考 netflix 在github上的 simple webapp,能夠按照netflix 在github wiki 上文檔說明來進行使用。github

簡單說來就是把一個請求地址轉發到另外的地址上面去,在轉發以前能夠進行權限驗證,合法檢查等操做。web

下圖展現了Zuul與Eureka配合使用時的架構spring

搭建網關服務Zuul(eureka-zuul)

接到上篇"SpringCloud之聲明式服務調用 Feign(三)"apache

繼續在springcloud工程中添加模塊eureka-zuul,也是經過start.spring.io提供的模板建立後端

新的目錄api

生成的pom.xml文件爲安全

<?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.xuan</groupId>
    <artifactId>eureka-zuul</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>eureka-zuul</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

修改啓動文件EurekaZuulApplication.java,增長@EnableZuulProxy註解。

package com.xuan.eurekazuul;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

@SpringBootApplication
@EnableZuulProxy
public class EurekaZuulApplication {

    public static void main(String[] args) {
        SpringApplication.run(EurekaZuulApplication.class, args);
    }
}

修改配置文件」application.properties「,找到註冊中心和定義自身的服務名,端口,轉發的路徑,

spring.application.name=eureka-zuul
server.port=8765

zuul.routes.api.path=/xuan/**
zuul.routes.api.serviceId=eureka-client
eureka.client.serviceUrl.defaultZone=http://localhost:8080/eureka/

分別啓動模塊了:

1.EurekaServerApplication

2.EurekaClientApplication,EurekaClientApplication1,EurekaClientApplication2

3.EurekaZuulApplication

啓動後打開http://localhost:8080/顯示如圖:

訪問Zuul模塊提供的接口http://localhost:8765/xuan/hello,刷新一次也會訪問到不一樣的提供者上面去,緣由是zuul作負載均衡。

 

 

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