Spring boot2X负载均衡和反向代理实现过程解析

这篇文章主要介绍了Spring boot2X负载均衡和反向代理实现过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

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

（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

来源：https://www.cnblogs.com/baby123/p/11907377.html