Spring boot2X集成zuul与consul实现负载均衡和反向代理

zuul 是netflix开源的一个API Gateway 服务器

所有从设备或网站来的请求都会经过Zuul到达后端的Netflix应用程序。

作为一个边界性质的应用程序，Zuul提供了动态路由、监控、弹性负载和安全功能。

实现反向代理

1.服务注册发现中心Consul

启动

consul agent -dev

2.服务端

provider和provider1

spring boot 版本 2.2.1.RELEASE

（1）添加依赖

<properties>

        <java.version>1.8</java.version>

        <spring-cloud.version>Greenwich.SR3</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-consul-discovery</artifactId>

        </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>

（2）配置

server.port=8010

spring.application.name=service-provider

spring.cloud.consul.host=localhost

spring.cloud.consul.port=8500

spring.cloud.consul.discovery.health-check-path=/actuator/health

spring.cloud.consul.discovery.service-name=${spring.application.name}

spring.cloud.consul.discovery.heartbeat.enabled=true

management.endpoints.web.exposure.include=*

management.endpoint.health.show-details=always

（3）测试方法

package com.xyz.provider.controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

@RestController

public class demoController {

    @RequestMapping("/hello")

    public String Hello(){

        return "hello,provider";

    }

}

（4）启动类

package com.xyz.provider;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@EnableDiscoveryClient

@SpringBootApplication

public class ProviderApplication {

    public static void main(String[] args) {

        SpringApplication.run(ProviderApplication.class, args);

    }

}

provide1的

server.port=8011

测试方法

package com.xyz.provider1.controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;

@RestController

public class demoController {

    @RequestMapping("/hello")

    public String Hello(){

        return "hello,another provider";

    }

}

3.网关

zuul

Spring boot版本 2.1.8.RELEASE

上面用的Spring boot版本为 2.2.1.RELEASE

但是启动时遇到了报错，因此改成了这个版本（报错问题）

（1）添加依赖

<properties>

        <java.version>1.8</java.version>

        <spring-cloud.version>Greenwich.SR2</spring-cloud.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-consul-discovery</artifactId>

        </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>

（2）添加配置

server.port=8090

spring.application.name=service-zuul

spring.cloud.consul.host=localhost

spring.cloud.consul.port=8500

spring.cloud.consul.discovery.service-name=${spring.application.name}

spring.cloud.consul.discovery.instance-id=${spring.application.name}:${server.port}

management.endpoints.web.exposure.include=*

management.endpoint.health.show-details=always

zuul.routes.api.path=/api/**

zuul.routes.api.serviceId=service-provider

（3）启动类

package com.xyz.zuul;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

import org.springframework.cloud.netflix.zuul.EnableZuulProxy;

@EnableZuulProxy

@SpringBootApplication

public class ZuulApplication {

    public static void main(String[] args) {

        SpringApplication.run(ZuulApplication.class, args);

    }

}

启动Consul

启动provider、provider1

启动 zuul

访问http://127.0.0.1:8090/api/hello

结果输出：

　　hello,provider和hello,another provider

结果交替出现的，负载均衡器采用的是轮询的方式

示例 https://gitee.com/babybeibeili/zuul_consul.git

巴特西

Spring boot2X集成zuul与consul实现负载均衡和反向代理

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