标签:word 服务端 class 客户 fse test apache alt cloud
同一份代码,改变端口,就可以启动多个同名但是端口不一样的微服务。
客户端通过nginx来调用后面的多个用户微服务来实现负载均衡,这是服务端负载均衡。
客户端有一个组件,可以知道当前有几个用户微服务的ip和端口,客户端实现一个负载均衡算法,直接去调用用户微服务。Ribbon是实现了客户端负载均衡的组件。
Ribbon选择一个在同一个zone且负载少的eureka,从中拉取可用的服务提供者列表,放到客户端,然后在客户端实现一个负载均衡的算法,最后命中到某个节点。Ribbon提供了多种算法:轮询、随机、根据响应时间。默认负载均衡的策略是轮询。
通过代码自定义配置ribbon:
package com.itmuch.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.netflix.ribbon.RibbonClient; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.ComponentScan; import org.springframework.context.annotation.FilterType; import org.springframework.web.client.RestTemplate; @SpringBootApplication @EnableEurekaClient @RibbonClient(name = "microservice-provider-user", configuration = TestConfiguration.class) //@ComponentScan扫的是他所在的包和子包 @ComponentScan(excludeFilters = { @ComponentScan.Filter(type = FilterType.ANNOTATION, value = ExcludeFromComponentScan.class) }) public class ConsumerMovieRibbonApplication { @Bean @LoadBalanced//就一个注解。@LoadBalanced整合了ribbon,让RestTemplate具备负载均衡的能力 public RestTemplate restTemplate() { return new RestTemplate(); } public static void main(String[] args) { SpringApplication.run(ConsumerMovieRibbonApplication.class, args); } }
package com.itmuch.cloud; public @interface ExcludeFromComponentScan { }
package com.itmuch.cloud; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import com.netflix.loadbalancer.IRule; import com.netflix.loadbalancer.RandomRule; @Configuration @ExcludeFromComponentScan//否则所有的ribbon客户端都会使用RandomRule这个规则 public class TestConfiguration { // @Autowired // IClientConfig config; @Bean public IRule ribbonRule() { return new RandomRule(); //随机选取一个微服务,也可以自己定义路由规则。 } }
package com.itmuch.cloud.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cloud.client.ServiceInstance; import org.springframework.cloud.client.loadbalancer.LoadBalancerClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; import com.itmuch.cloud.entity.User; @RestController public class MovieController { @Autowired private RestTemplate restTemplate; @Autowired private LoadBalancerClient loadBalancerClient; @GetMapping("/movie/{id}") public User findById(@PathVariable Long id) { // http://localhost:7900/simple/,microservice-provider-user是注册到eureka之后的一个虚拟主机名(页面有,microservice-provider-user工程的虚拟主机名)。 //microservice-provider-user工程的配置文件中spring.application.name中定义。 // VIP virtual IP。不再是通过服务提供者的ip和端口访问了。 // HAProxy Heartbeat //spring:application:name:microservice-provider-user return this.restTemplate.getForObject("http://microservice-provider-user/simple/" + id, User.class); } @GetMapping("/test") public String test() { //如果microservice-provider-user微服务有多个,可以看出命中的是哪个ip端口 ServiceInstance serviceInstance = this.loadBalancerClient.choose("microservice-provider-user"); System.out.println("111" + ":" + serviceInstance.getServiceId() + ":" + serviceInstance.getHost() + ":" + serviceInstance.getPort()); ServiceInstance serviceInstance2 = this.loadBalancerClient.choose("microservice-provider-user2"); System.out.println("222" + ":" + serviceInstance2.getServiceId() + ":" + serviceInstance2.getHost() + ":" + serviceInstance2.getPort()); return "1"; } }
spring: application: name: microservice-consumer-movie-ribbon #自己的工程名字 server: port: 8010 eureka: client: healthcheck: enabled: true serviceUrl: defaultZone: http://user:password123@localhost:8761/eureka #eureka server的地址 instance: prefer-ip-address: true
<?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>
<artifactId>microservice-consumer-movie-ribbon</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>com.itmuch.cloud</groupId>
<artifactId>microservice-spring-cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</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.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- ribbon注册到eureka上面去 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
</project>
通过配置文件自定义ribbon:
package com.itmuch.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @SpringBootApplication @EnableEurekaClient public class ConsumerMovieRibbonApplication { @Bean @LoadBalanced//就一个注解。@LoadBalanced整合了ribbon,让RestTemplate具备负载均衡的能力 public RestTemplate restTemplate() { return new RestTemplate(); } public static void main(String[] args) { SpringApplication.run(ConsumerMovieRibbonApplication.class, args); } }
package com.itmuch.cloud.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cloud.client.ServiceInstance; import org.springframework.cloud.client.loadbalancer.LoadBalancerClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; import com.itmuch.cloud.entity.User; @RestController public class MovieController { @Autowired private RestTemplate restTemplate; @Autowired private LoadBalancerClient loadBalancerClient; @GetMapping("/movie/{id}") public User findById(@PathVariable Long id) { // http://localhost:7900/simple/ // VIP virtual IP // HAProxy Heartbeat ServiceInstance serviceInstance = this.loadBalancerClient.choose("microservice-provider-user"); System.out.println("===" + ":" + serviceInstance.getServiceId() + ":" + serviceInstance.getHost() + ":" + serviceInstance.getPort()); return this.restTemplate.getForObject("http://microservice-provider-user/simple/" + id, User.class); } @GetMapping("/test") public String test() { ServiceInstance serviceInstance = this.loadBalancerClient.choose("microservice-provider-user"); System.out.println("111" + ":" + serviceInstance.getServiceId() + ":" + serviceInstance.getHost() + ":" + serviceInstance.getPort()); ServiceInstance serviceInstance2 = this.loadBalancerClient.choose("microservice-provider-user2"); System.out.println("222" + ":" + serviceInstance2.getServiceId() + ":" + serviceInstance2.getHost() + ":" + serviceInstance2.getPort()); return "1"; } }
spring: application: name: microservice-consumer-movie-ribbon server: port: 8010 eureka: client: healthcheck: enabled: true serviceUrl: defaultZone: http://user:password123@localhost:8761/eureka instance: prefer-ip-address: true microservice-provider-user: #请求这个微服务的时候 ribbon: #ribbon配置 NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule #随机的rule去负载均衡
<?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>
<artifactId>microservice-consumer-movie-ribbon-properties-customizing</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>com.itmuch.cloud</groupId>
<artifactId>microservice-spring-cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</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.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
</project>
Ribbon禁止eureka:
package com.itmuch.cloud; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @SpringBootApplication @EnableEurekaClient public class ConsumerMovieRibbonApplication { @Bean @LoadBalanced public RestTemplate restTemplate() { return new RestTemplate(); } public static void main(String[] args) { SpringApplication.run(ConsumerMovieRibbonApplication.class, args); } }
package com.itmuch.cloud.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cloud.client.ServiceInstance; import org.springframework.cloud.client.loadbalancer.LoadBalancerClient; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; import com.itmuch.cloud.entity.User; @RestController public class MovieController { @Autowired private RestTemplate restTemplate; @Autowired private LoadBalancerClient loadBalancerClient; @GetMapping("/movie/{id}") public User findById(@PathVariable Long id) { // http://localhost:7900/simple/ // VIP virtual IP // HAProxy Heartbeat ServiceInstance serviceInstance = this.loadBalancerClient.choose("microservice-provider-user"); System.out.println("===" + ":" + serviceInstance.getServiceId() + ":" + serviceInstance.getHost() + ":" + serviceInstance.getPort()); return this.restTemplate.getForObject("http://microservice-provider-user/simple/" + id, User.class); } @GetMapping("/test") public String test() { ServiceInstance serviceInstance = this.loadBalancerClient.choose("microservice-provider-user"); System.out.println("111" + ":" + serviceInstance.getServiceId() + ":" + serviceInstance.getHost() + ":" + serviceInstance.getPort()); ServiceInstance serviceInstance2 = this.loadBalancerClient.choose("microservice-provider-user2"); System.out.println("222" + ":" + serviceInstance2.getServiceId() + ":" + serviceInstance2.getHost() + ":" + serviceInstance2.getPort()); return "1"; } }
spring: application: name: microservice-consumer-movie-ribbon server: port: 8010 eureka: client: healthcheck: enabled: true serviceUrl: defaultZone: http://user:password123@localhost:8761/eureka instance: prefer-ip-address: true ribbon: eureka: enabled: false #禁止ribbon中的eureka microservice-provider-user: #请求这个微服务的时候(此时这个微服务有7900.7901.7904三个微服务),只访问7900 ribbon: listOfServers: localhost:7900
<?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>
<artifactId>microservice-consumer-movie-ribbon-without-eureka</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>com.itmuch.cloud</groupId>
<artifactId>microservice-spring-cloud</artifactId>
<version>0.0.1-SNAPSHOT</version>
</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.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
</project>
标签:word 服务端 class 客户 fse test apache alt cloud
原文地址:https://www.cnblogs.com/yaowen/p/9128228.html