Spring Boot 2.X中如何配置负载均衡与反向代理的详细步骤解析？

本文共计1174个文字，预计阅读时间需要5分钟。

本文简要介绍了Spring Boot 2.X中的负载均衡和反向代理实现过程，并通过示例代码进行讲解，内容非非常详细，适合对Spring Boot有一定了解的学习者或工作者参考。

Spring Boot 2.X负载均衡和反向代理示例：java@RestControllerpublic class LoadBalancerController {

@Autowired private RestTemplate restTemplate;

@GetMapping(/load-balancer) public String loadBalancer() { String result=restTemplate.getForObject(http://service1/api/data, String.class); return Load Balancer Result: + result; }}

java@Configurationpublic class LoadBalancerConfig {

@LoadBalanced @Bean public RestTemplate restTemplate() { return new RestTemplate(); }}

使用zuul实现反向代理：java@EnableZuulProxy@Configurationpublic class ZuulConfig { @Bean public ZuulFilter preRequestFilter() { return new PreRequestFilter(); }}

class PreRequestFilter extends ZuulFilter {

@Override public String filterType() { return pre; }

@Override public int filterOrder() { return 1; }

@Override public boolean shouldFilter() { return true; }

@Override public Object run() { // Filter logic here return null; }}

java@Beanpublic ZuulRouteLocator routeLocator(ZuulProperties properties) { return new CustomRouteLocator(properties);}

class CustomRouteLocator extends ZuulRouteLocator {

public CustomRouteLocator(ZuulProperties properties) { super(properties); }

@Override protected ListZuulRouteLocator routes() { // Define routes here return null; }}

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gitee.com/babybeibeili/zuul_consul.git

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持易盾网络。