路由网关Zuul结合Config-Server配置文件更新教程

Quick Start

Zuul的主要功能是路由转发和过滤器。路由功能是微服务的一部分，比如／api/user转发到到user服务，/api/shop转发到到shop服务。zuul默认和Ribbon结合实现了负载均衡的功能。

创建项目

新建一个项目名叫service-zuul，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.fiveplus</groupId>
	<artifactId>service-zuul</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>service-zuul</name>
	<description>Zuul project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.8.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>
	</properties>

	<dependencies>
	
		<dependency>
		  	<groupId>org.springframework.cloud</groupId>
		  	<artifactId>spring-cloud-starter-bus-amqp</artifactId>
		</dependency>
		
		<dependency>
		  	<groupId>org.springframework.boot</groupId>
		  	<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
	
		<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>
	
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-eureka</artifactId>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-zuul</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>
			<scope>test</scope>
		</dependency>
		
		<dependency>
	        <groupId>org.aspectj</groupId>
	        <artifactId>aspectjweaver</artifactId>
	        <version>1.8.9</version>
	    </dependency>
		
	</dependencies>
	
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-dependencies</artifactId>
				<version>Dalston.RC1</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>
    					<executable>true</executable>
  				</configuration>
			</plugin>
		</plugins>
	</build>
	
	<repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

</project>

接下来是application.properties配置文件

eureka.client.service-url.default-zone=http://localhost:8761/eureka/

server.port=8769

spring.rabbitmq.host=localhost
spring.rabbitmq.port=5672

注意一下，需要安装rabbitmq。

接下来是bootstrap.properties配置文件，用来配置连接的Config Server。

spring.application.name=service-zuul
spring.cloud.config.label=master
spring.cloud.config.profile=dev
spring.cloud.config.uri= http://localhost:8888/

然后是Application.java文件：

package com.fiveplus;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.config.server.EnableConfigServer;

@SpringBootApplication
@EnableConfigServer
public class Application {

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

好了，然后我们可以把所有的路由全写在git上（service-zuul-dev.properties）：

zuul.routes.user.path=/user-service/**
zuul.routes.user.service-id=user-service

然后可以结合WebHook，每当push文件的时候，发送请求更新配置文件：

http://<config_server_hostname/config_server_ip>:<config_server_port>/bus/refresh

结束

注意，在Spring Config Server搭建教程中已经配置了Spring-Cloud-Bus。